/*
- * Copyright (c) 2000-2009 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2020 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
- *
+ *
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
*/
-/*
+/*
* Mach Operating System
* Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
* All Rights Reserved.
- *
+ *
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
- *
+ *
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
+ *
* Carnegie Mellon requests users of this software to return to
- *
+ *
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
- *
+ *
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
*/
#include <stdint.h>
+#include <ptrauth.h>
#include <debug.h>
#include <mach_pagemap.h>
#include <mach_cluster_stats.h>
-#include <advisory_pageout.h>
#include <mach/mach_types.h>
#include <mach/memory_object.h>
#include <kern/misc_protos.h>
#include <kern/sched.h>
#include <kern/thread.h>
-#include <kern/xpr.h>
#include <kern/kalloc.h>
+#include <kern/zalloc_internal.h>
+#include <kern/policy_internal.h>
+#include <kern/thread_group.h>
#include <machine/vm_tuning.h>
#include <machine/commpage.h>
#include <vm/vm_shared_region.h>
#include <vm/vm_compressor.h>
-/*
- * ENCRYPTED SWAP:
- */
-#include <libkern/crypto/aes.h>
-extern u_int32_t random(void); /* from <libkern/libkern.h> */
+#include <san/kasan.h>
-extern int cs_debug;
+#if CONFIG_PHANTOM_CACHE
+#include <vm/vm_phantom_cache.h>
+#endif
#if UPL_DEBUG
#include <libkern/OSDebug.h>
#endif
-extern vm_pressure_level_t memorystatus_vm_pressure_level;
-int memorystatus_purge_on_warning = 2;
-int memorystatus_purge_on_urgent = 5;
-int memorystatus_purge_on_critical = 8;
+extern int cs_debug;
+
+extern void mbuf_drain(boolean_t);
#if VM_PRESSURE_EVENTS
+#if CONFIG_JETSAM
+extern unsigned int memorystatus_available_pages;
+extern unsigned int memorystatus_available_pages_pressure;
+extern unsigned int memorystatus_available_pages_critical;
+#else /* CONFIG_JETSAM */
+extern uint64_t memorystatus_available_pages;
+extern uint64_t memorystatus_available_pages_pressure;
+extern uint64_t memorystatus_available_pages_critical;
+#endif /* CONFIG_JETSAM */
+
+extern unsigned int memorystatus_frozen_count;
+extern unsigned int memorystatus_suspended_count;
+extern vm_pressure_level_t memorystatus_vm_pressure_level;
+
+extern lck_mtx_t memorystatus_jetsam_fg_band_lock;
+extern uint32_t memorystatus_jetsam_fg_band_waiters;
+
void vm_pressure_response(void);
-boolean_t vm_pressure_thread_running = FALSE;
extern void consider_vm_pressure_events(void);
-#endif
-boolean_t vm_pressure_changed = FALSE;
-#ifndef VM_PAGEOUT_BURST_ACTIVE_THROTTLE /* maximum iterations of the active queue to move pages to inactive */
-#define VM_PAGEOUT_BURST_ACTIVE_THROTTLE 100
-#endif
+#define MEMORYSTATUS_SUSPENDED_THRESHOLD 4
+#endif /* VM_PRESSURE_EVENTS */
+
+thread_t vm_pageout_scan_thread = THREAD_NULL;
+boolean_t vps_dynamic_priority_enabled = FALSE;
#ifndef VM_PAGEOUT_BURST_INACTIVE_THROTTLE /* maximum iterations of the inactive queue w/o stealing/cleaning a page */
+#ifdef CONFIG_EMBEDDED
+#define VM_PAGEOUT_BURST_INACTIVE_THROTTLE 1024
+#else
#define VM_PAGEOUT_BURST_INACTIVE_THROTTLE 4096
#endif
-
-#ifndef VM_PAGEOUT_DEADLOCK_RELIEF
-#define VM_PAGEOUT_DEADLOCK_RELIEF 100 /* number of pages to move to break deadlock */
#endif
-#ifndef VM_PAGEOUT_INACTIVE_RELIEF
-#define VM_PAGEOUT_INACTIVE_RELIEF 50 /* minimum number of pages to move to the inactive q */
+#ifndef VM_PAGEOUT_DEADLOCK_RELIEF
+#define VM_PAGEOUT_DEADLOCK_RELIEF 100 /* number of pages to move to break deadlock */
#endif
-#ifndef VM_PAGE_LAUNDRY_MAX
-#define VM_PAGE_LAUNDRY_MAX 128UL /* maximum pageouts on a given pageout queue */
-#endif /* VM_PAGEOUT_LAUNDRY_MAX */
+#ifndef VM_PAGE_LAUNDRY_MAX
+#define VM_PAGE_LAUNDRY_MAX 128UL /* maximum pageouts on a given pageout queue */
+#endif /* VM_PAGEOUT_LAUNDRY_MAX */
-#ifndef VM_PAGEOUT_BURST_WAIT
-#define VM_PAGEOUT_BURST_WAIT 30 /* milliseconds */
-#endif /* VM_PAGEOUT_BURST_WAIT */
+#ifndef VM_PAGEOUT_BURST_WAIT
+#define VM_PAGEOUT_BURST_WAIT 1 /* milliseconds */
+#endif /* VM_PAGEOUT_BURST_WAIT */
-#ifndef VM_PAGEOUT_EMPTY_WAIT
-#define VM_PAGEOUT_EMPTY_WAIT 200 /* milliseconds */
-#endif /* VM_PAGEOUT_EMPTY_WAIT */
+#ifndef VM_PAGEOUT_EMPTY_WAIT
+#define VM_PAGEOUT_EMPTY_WAIT 50 /* milliseconds */
+#endif /* VM_PAGEOUT_EMPTY_WAIT */
-#ifndef VM_PAGEOUT_DEADLOCK_WAIT
-#define VM_PAGEOUT_DEADLOCK_WAIT 300 /* milliseconds */
-#endif /* VM_PAGEOUT_DEADLOCK_WAIT */
+#ifndef VM_PAGEOUT_DEADLOCK_WAIT
+#define VM_PAGEOUT_DEADLOCK_WAIT 100 /* milliseconds */
+#endif /* VM_PAGEOUT_DEADLOCK_WAIT */
-#ifndef VM_PAGEOUT_IDLE_WAIT
-#define VM_PAGEOUT_IDLE_WAIT 10 /* milliseconds */
-#endif /* VM_PAGEOUT_IDLE_WAIT */
+#ifndef VM_PAGEOUT_IDLE_WAIT
+#define VM_PAGEOUT_IDLE_WAIT 10 /* milliseconds */
+#endif /* VM_PAGEOUT_IDLE_WAIT */
-#ifndef VM_PAGEOUT_SWAP_WAIT
-#define VM_PAGEOUT_SWAP_WAIT 50 /* milliseconds */
-#endif /* VM_PAGEOUT_SWAP_WAIT */
+#ifndef VM_PAGEOUT_SWAP_WAIT
+#define VM_PAGEOUT_SWAP_WAIT 10 /* milliseconds */
+#endif /* VM_PAGEOUT_SWAP_WAIT */
-#ifndef VM_PAGEOUT_PRESSURE_PAGES_CONSIDERED
-#define VM_PAGEOUT_PRESSURE_PAGES_CONSIDERED 1000 /* maximum pages considered before we issue a pressure event */
-#endif /* VM_PAGEOUT_PRESSURE_PAGES_CONSIDERED */
-
-#ifndef VM_PAGEOUT_PRESSURE_EVENT_MONITOR_SECS
-#define VM_PAGEOUT_PRESSURE_EVENT_MONITOR_SECS 5 /* seconds */
-#endif /* VM_PAGEOUT_PRESSURE_EVENT_MONITOR_SECS */
-
-unsigned int vm_page_speculative_q_age_ms = VM_PAGE_SPECULATIVE_Q_AGE_MS;
-unsigned int vm_page_speculative_percentage = 5;
#ifndef VM_PAGE_SPECULATIVE_TARGET
-#define VM_PAGE_SPECULATIVE_TARGET(total) ((total) * 1 / (100 / vm_page_speculative_percentage))
+#define VM_PAGE_SPECULATIVE_TARGET(total) ((total) * 1 / (100 / vm_pageout_state.vm_page_speculative_percentage))
#endif /* VM_PAGE_SPECULATIVE_TARGET */
-#ifndef VM_PAGE_INACTIVE_HEALTHY_LIMIT
-#define VM_PAGE_INACTIVE_HEALTHY_LIMIT(total) ((total) * 1 / 200)
-#endif /* VM_PAGE_INACTIVE_HEALTHY_LIMIT */
-
-
/*
* To obtain a reasonable LRU approximation, the inactive queue
* needs to be large enough to give pages on it a chance to be
* then the pageout daemon starts running.
*/
-#ifndef VM_PAGE_INACTIVE_TARGET
-#define VM_PAGE_INACTIVE_TARGET(avail) ((avail) * 1 / 2)
-#endif /* VM_PAGE_INACTIVE_TARGET */
+#ifndef VM_PAGE_INACTIVE_TARGET
+#define VM_PAGE_INACTIVE_TARGET(avail) ((avail) * 1 / 2)
+#endif /* VM_PAGE_INACTIVE_TARGET */
/*
* Once the pageout daemon starts running, it keeps going
* until vm_page_free_count meets or exceeds vm_page_free_target.
*/
-#ifndef VM_PAGE_FREE_TARGET
-#define VM_PAGE_FREE_TARGET(free) (15 + (free) / 80)
-#endif /* VM_PAGE_FREE_TARGET */
+#ifndef VM_PAGE_FREE_TARGET
+#ifdef CONFIG_EMBEDDED
+#define VM_PAGE_FREE_TARGET(free) (15 + (free) / 100)
+#else
+#define VM_PAGE_FREE_TARGET(free) (15 + (free) / 80)
+#endif
+#endif /* VM_PAGE_FREE_TARGET */
/*
* falls below vm_page_free_min.
*/
-#ifndef VM_PAGE_FREE_MIN
-#define VM_PAGE_FREE_MIN(free) (10 + (free) / 100)
-#endif /* VM_PAGE_FREE_MIN */
-
-#define VM_PAGE_FREE_RESERVED_LIMIT 100
-#define VM_PAGE_FREE_MIN_LIMIT 1500
-#define VM_PAGE_FREE_TARGET_LIMIT 2000
+#ifndef VM_PAGE_FREE_MIN
+#ifdef CONFIG_EMBEDDED
+#define VM_PAGE_FREE_MIN(free) (10 + (free) / 200)
+#else
+#define VM_PAGE_FREE_MIN(free) (10 + (free) / 100)
+#endif
+#endif /* VM_PAGE_FREE_MIN */
+#ifdef CONFIG_EMBEDDED
+#define VM_PAGE_FREE_RESERVED_LIMIT 100
+#define VM_PAGE_FREE_MIN_LIMIT 1500
+#define VM_PAGE_FREE_TARGET_LIMIT 2000
+#else
+#define VM_PAGE_FREE_RESERVED_LIMIT 1700
+#define VM_PAGE_FREE_MIN_LIMIT 3500
+#define VM_PAGE_FREE_TARGET_LIMIT 4000
+#endif
/*
* When vm_page_free_count falls below vm_page_free_reserved,
* operation by dipping into the reserved pool of pages.
*/
-#ifndef VM_PAGE_FREE_RESERVED
-#define VM_PAGE_FREE_RESERVED(n) \
+#ifndef VM_PAGE_FREE_RESERVED
+#define VM_PAGE_FREE_RESERVED(n) \
((unsigned) (6 * VM_PAGE_LAUNDRY_MAX) + (n))
-#endif /* VM_PAGE_FREE_RESERVED */
+#endif /* VM_PAGE_FREE_RESERVED */
/*
* When we dequeue pages from the inactive list, they are
* we will make per call of vm_pageout_scan().
*/
#define VM_PAGE_REACTIVATE_LIMIT_MAX 20000
-#ifndef VM_PAGE_REACTIVATE_LIMIT
-#define VM_PAGE_REACTIVATE_LIMIT(avail) (MAX((avail) * 1 / 20,VM_PAGE_REACTIVATE_LIMIT_MAX))
-#endif /* VM_PAGE_REACTIVATE_LIMIT */
-#define VM_PAGEOUT_INACTIVE_FORCE_RECLAIM 100
+#ifndef VM_PAGE_REACTIVATE_LIMIT
+#ifdef CONFIG_EMBEDDED
+#define VM_PAGE_REACTIVATE_LIMIT(avail) (VM_PAGE_INACTIVE_TARGET(avail) / 2)
+#else
+#define VM_PAGE_REACTIVATE_LIMIT(avail) (MAX((avail) * 1 / 20,VM_PAGE_REACTIVATE_LIMIT_MAX))
+#endif
+#endif /* VM_PAGE_REACTIVATE_LIMIT */
+#define VM_PAGEOUT_INACTIVE_FORCE_RECLAIM 1000
extern boolean_t hibernate_cleaning_in_progress;
-/*
- * Exported variable used to broadcast the activation of the pageout scan
- * Working Set uses this to throttle its use of pmap removes. In this
- * way, code which runs within memory in an uncontested context does
- * not keep encountering soft faults.
- */
-
-unsigned int vm_pageout_scan_event_counter = 0;
-
/*
* Forward declarations for internal routines.
*/
struct cq {
struct vm_pageout_queue *q;
- void *current_chead;
- char *scratch_buf;
+ void *current_chead;
+ char *scratch_buf;
+ int id;
};
+struct cq ciq[MAX_COMPRESSOR_THREAD_COUNT];
+
#if VM_PRESSURE_EVENTS
void vm_pressure_thread(void);
+
+boolean_t VM_PRESSURE_NORMAL_TO_WARNING(void);
+boolean_t VM_PRESSURE_WARNING_TO_CRITICAL(void);
+
+boolean_t VM_PRESSURE_WARNING_TO_NORMAL(void);
+boolean_t VM_PRESSURE_CRITICAL_TO_WARNING(void);
#endif
-static void vm_pageout_garbage_collect(int);
-static void vm_pageout_iothread_continue(struct vm_pageout_queue *);
+
+void vm_pageout_garbage_collect(int);
static void vm_pageout_iothread_external(void);
static void vm_pageout_iothread_internal(struct cq *cq);
-static void vm_pageout_adjust_io_throttles(struct vm_pageout_queue *, struct vm_pageout_queue *, boolean_t);
+static void vm_pageout_adjust_eq_iothrottle(struct vm_pageout_queue *, boolean_t);
extern void vm_pageout_continue(void);
extern void vm_pageout_scan(void);
-static thread_t vm_pageout_external_iothread = THREAD_NULL;
-static thread_t vm_pageout_internal_iothread = THREAD_NULL;
-
-unsigned int vm_pageout_reserved_internal = 0;
-unsigned int vm_pageout_reserved_really = 0;
-
-unsigned int vm_pageout_swap_wait = 0;
-unsigned int vm_pageout_idle_wait = 0; /* milliseconds */
-unsigned int vm_pageout_empty_wait = 0; /* milliseconds */
-unsigned int vm_pageout_burst_wait = 0; /* milliseconds */
-unsigned int vm_pageout_deadlock_wait = 0; /* milliseconds */
-unsigned int vm_pageout_deadlock_relief = 0;
-unsigned int vm_pageout_inactive_relief = 0;
-unsigned int vm_pageout_burst_active_throttle = 0;
-unsigned int vm_pageout_burst_inactive_throttle = 0;
-
-int vm_upl_wait_for_pages = 0;
+boolean_t vm_pageout_running = FALSE;
+uint32_t vm_page_upl_tainted = 0;
+uint32_t vm_page_iopl_tainted = 0;
-/*
- * These variables record the pageout daemon's actions:
- * how many pages it looks at and what happens to those pages.
- * No locking needed because only one thread modifies the variables.
- */
+#if !CONFIG_EMBEDDED
+static boolean_t vm_pageout_waiter = FALSE;
+#endif /* !CONFIG_EMBEDDED */
-unsigned int vm_pageout_active = 0; /* debugging */
-unsigned int vm_pageout_active_busy = 0; /* debugging */
-unsigned int vm_pageout_inactive = 0; /* debugging */
-unsigned int vm_pageout_inactive_throttled = 0; /* debugging */
-unsigned int vm_pageout_inactive_forced = 0; /* debugging */
-unsigned int vm_pageout_inactive_nolock = 0; /* debugging */
-unsigned int vm_pageout_inactive_avoid = 0; /* debugging */
-unsigned int vm_pageout_inactive_busy = 0; /* debugging */
-unsigned int vm_pageout_inactive_error = 0; /* debugging */
-unsigned int vm_pageout_inactive_absent = 0; /* debugging */
-unsigned int vm_pageout_inactive_notalive = 0; /* debugging */
-unsigned int vm_pageout_inactive_used = 0; /* debugging */
-unsigned int vm_pageout_cache_evicted = 0; /* debugging */
-unsigned int vm_pageout_inactive_clean = 0; /* debugging */
-unsigned int vm_pageout_speculative_clean = 0; /* debugging */
-
-unsigned int vm_pageout_freed_from_cleaned = 0;
-unsigned int vm_pageout_freed_from_speculative = 0;
-unsigned int vm_pageout_freed_from_inactive_clean = 0;
-
-unsigned int vm_pageout_enqueued_cleaned_from_inactive_clean = 0;
-unsigned int vm_pageout_enqueued_cleaned_from_inactive_dirty = 0;
-
-unsigned int vm_pageout_cleaned_reclaimed = 0; /* debugging; how many cleaned pages are reclaimed by the pageout scan */
-unsigned int vm_pageout_cleaned_reactivated = 0; /* debugging; how many cleaned pages are found to be referenced on pageout (and are therefore reactivated) */
-unsigned int vm_pageout_cleaned_reference_reactivated = 0;
-unsigned int vm_pageout_cleaned_volatile_reactivated = 0;
-unsigned int vm_pageout_cleaned_fault_reactivated = 0;
-unsigned int vm_pageout_cleaned_commit_reactivated = 0; /* debugging; how many cleaned pages are found to be referenced on commit (and are therefore reactivated) */
-unsigned int vm_pageout_cleaned_busy = 0;
-unsigned int vm_pageout_cleaned_nolock = 0;
-
-unsigned int vm_pageout_inactive_dirty_internal = 0; /* debugging */
-unsigned int vm_pageout_inactive_dirty_external = 0; /* debugging */
-unsigned int vm_pageout_inactive_deactivated = 0; /* debugging */
-unsigned int vm_pageout_inactive_anonymous = 0; /* debugging */
-unsigned int vm_pageout_dirty_no_pager = 0; /* debugging */
-unsigned int vm_pageout_purged_objects = 0; /* debugging */
-unsigned int vm_stat_discard = 0; /* debugging */
-unsigned int vm_stat_discard_sent = 0; /* debugging */
-unsigned int vm_stat_discard_failure = 0; /* debugging */
-unsigned int vm_stat_discard_throttle = 0; /* debugging */
-unsigned int vm_pageout_reactivation_limit_exceeded = 0; /* debugging */
-unsigned int vm_pageout_catch_ups = 0; /* debugging */
-unsigned int vm_pageout_inactive_force_reclaim = 0; /* debugging */
-
-unsigned int vm_pageout_scan_reclaimed_throttled = 0;
-unsigned int vm_pageout_scan_active_throttled = 0;
-unsigned int vm_pageout_scan_inactive_throttled_internal = 0;
-unsigned int vm_pageout_scan_inactive_throttled_external = 0;
-unsigned int vm_pageout_scan_throttle = 0; /* debugging */
-unsigned int vm_pageout_scan_burst_throttle = 0; /* debugging */
-unsigned int vm_pageout_scan_empty_throttle = 0; /* debugging */
-unsigned int vm_pageout_scan_swap_throttle = 0; /* debugging */
-unsigned int vm_pageout_scan_deadlock_detected = 0; /* debugging */
-unsigned int vm_pageout_scan_active_throttle_success = 0; /* debugging */
-unsigned int vm_pageout_scan_inactive_throttle_success = 0; /* debugging */
-unsigned int vm_pageout_inactive_external_forced_jetsam_count = 0; /* debugging */
-unsigned int vm_page_speculative_count_drifts = 0;
-unsigned int vm_page_speculative_count_drift_max = 0;
+#if DEVELOPMENT || DEBUG
+struct vm_pageout_debug vm_pageout_debug;
+#endif
+struct vm_pageout_vminfo vm_pageout_vminfo;
+struct vm_pageout_state vm_pageout_state;
+struct vm_config vm_config;
-/*
- * Backing store throttle when BS is exhausted
- */
-unsigned int vm_backing_store_low = 0;
-
-unsigned int vm_pageout_out_of_line = 0;
-unsigned int vm_pageout_in_place = 0;
+struct vm_pageout_queue vm_pageout_queue_internal VM_PAGE_PACKED_ALIGNED;
+struct vm_pageout_queue vm_pageout_queue_external VM_PAGE_PACKED_ALIGNED;
-unsigned int vm_page_steal_pageout_page = 0;
+int vm_upl_wait_for_pages = 0;
+vm_object_t vm_pageout_scan_wants_object = VM_OBJECT_NULL;
-/*
- * ENCRYPTED SWAP:
- * counters and statistics...
- */
-unsigned long vm_page_decrypt_counter = 0;
-unsigned long vm_page_decrypt_for_upl_counter = 0;
-unsigned long vm_page_encrypt_counter = 0;
-unsigned long vm_page_encrypt_abort_counter = 0;
-unsigned long vm_page_encrypt_already_encrypted_counter = 0;
-boolean_t vm_pages_encrypted = FALSE; /* are there encrypted pages ? */
+boolean_t(*volatile consider_buffer_cache_collect)(int) = NULL;
-struct vm_pageout_queue vm_pageout_queue_internal;
-struct vm_pageout_queue vm_pageout_queue_external;
+int vm_debug_events = 0;
-unsigned int vm_page_speculative_target = 0;
+LCK_GRP_DECLARE(vm_pageout_lck_grp, "vm_pageout");
-vm_object_t vm_pageout_scan_wants_object = VM_OBJECT_NULL;
+#if CONFIG_MEMORYSTATUS
+extern boolean_t memorystatus_kill_on_VM_page_shortage(boolean_t async);
-boolean_t (* volatile consider_buffer_cache_collect)(int) = NULL;
+uint32_t vm_pageout_memorystatus_fb_factor_nr = 5;
+uint32_t vm_pageout_memorystatus_fb_factor_dr = 2;
-#if DEVELOPMENT || DEBUG
-unsigned long vm_cs_validated_resets = 0;
#endif
-int vm_debug_events = 0;
+#if __AMP__
+int vm_compressor_ebound = 1;
+int vm_pgo_pbound = 0;
+extern void thread_bind_cluster_type(thread_t, char, bool);
+#endif /* __AMP__ */
-#if CONFIG_MEMORYSTATUS
-#if !CONFIG_JETSAM
-extern boolean_t memorystatus_idle_exit_from_VM(void);
-#endif
-extern boolean_t memorystatus_kill_on_VM_page_shortage(boolean_t async);
-extern void memorystatus_on_pageout_scan_end(void);
-#endif
-
-boolean_t vm_page_compressions_failing = FALSE;
/*
- * Routine: vm_backing_store_disable
- * Purpose:
- * Suspend non-privileged threads wishing to extend
- * backing store when we are low on backing store
- * (Synchronized by caller)
- */
-void
-vm_backing_store_disable(
- boolean_t disable)
-{
- if(disable) {
- vm_backing_store_low = 1;
- } else {
- if(vm_backing_store_low) {
- vm_backing_store_low = 0;
- thread_wakeup((event_t) &vm_backing_store_low);
- }
- }
-}
-
-
-#if MACH_CLUSTER_STATS
-unsigned long vm_pageout_cluster_dirtied = 0;
-unsigned long vm_pageout_cluster_cleaned = 0;
-unsigned long vm_pageout_cluster_collisions = 0;
-unsigned long vm_pageout_cluster_clusters = 0;
-unsigned long vm_pageout_cluster_conversions = 0;
-unsigned long vm_pageout_target_collisions = 0;
-unsigned long vm_pageout_target_page_dirtied = 0;
-unsigned long vm_pageout_target_page_freed = 0;
-#define CLUSTER_STAT(clause) clause
-#else /* MACH_CLUSTER_STATS */
-#define CLUSTER_STAT(clause)
-#endif /* MACH_CLUSTER_STATS */
-
-/*
* Routine: vm_pageout_object_terminate
* Purpose:
* Destroy the pageout_object, and perform all of the
* required cleanup actions.
- *
+ *
* In/Out conditions:
* The object must be locked, and will be returned locked.
*/
void
vm_pageout_object_terminate(
- vm_object_t object)
+ vm_object_t object)
{
- vm_object_t shadow_object;
+ vm_object_t shadow_object;
/*
* Deal with the deallocation (last reference) of a pageout object
shadow_object = object->shadow;
vm_object_lock(shadow_object);
- while (!queue_empty(&object->memq)) {
- vm_page_t p, m;
- vm_object_offset_t offset;
+ while (!vm_page_queue_empty(&object->memq)) {
+ vm_page_t p, m;
+ vm_object_offset_t offset;
- p = (vm_page_t) queue_first(&object->memq);
+ p = (vm_page_t) vm_page_queue_first(&object->memq);
- assert(p->private);
- assert(p->pageout);
- p->pageout = FALSE;
- assert(!p->cleaning);
- assert(!p->laundry);
+ assert(p->vmp_private);
+ assert(p->vmp_free_when_done);
+ p->vmp_free_when_done = FALSE;
+ assert(!p->vmp_cleaning);
+ assert(!p->vmp_laundry);
- offset = p->offset;
+ offset = p->vmp_offset;
VM_PAGE_FREE(p);
p = VM_PAGE_NULL;
m = vm_page_lookup(shadow_object,
- offset + object->vo_shadow_offset);
+ offset + object->vo_shadow_offset);
- if(m == VM_PAGE_NULL)
+ if (m == VM_PAGE_NULL) {
continue;
+ }
- assert((m->dirty) || (m->precious) ||
- (m->busy && m->cleaning));
+ assert((m->vmp_dirty) || (m->vmp_precious) ||
+ (m->vmp_busy && m->vmp_cleaning));
/*
* Handle the trusted pager throttle.
* Also decrement the burst throttle (if external).
*/
vm_page_lock_queues();
- if (m->pageout_queue)
+ if (m->vmp_q_state == VM_PAGE_ON_PAGEOUT_Q) {
vm_pageout_throttle_up(m);
+ }
/*
* Handle the "target" page(s). These pages are to be freed if
* pages may have been modified between the selection as an
* adjacent page and conversion to a target.
*/
- if (m->pageout) {
- assert(m->busy);
- assert(m->wire_count == 1);
- m->cleaning = FALSE;
- m->encrypted_cleaning = FALSE;
- m->pageout = FALSE;
-#if MACH_CLUSTER_STATS
- if (m->wanted) vm_pageout_target_collisions++;
-#endif
+ if (m->vmp_free_when_done) {
+ assert(m->vmp_busy);
+ assert(m->vmp_q_state == VM_PAGE_IS_WIRED);
+ assert(m->vmp_wire_count == 1);
+ m->vmp_cleaning = FALSE;
+ m->vmp_free_when_done = FALSE;
/*
* Revoke all access to the page. Since the object is
* locked, and the page is busy, this prevents the page
* can detect whether the page was redirtied during
* pageout by checking the modify state.
*/
- if (pmap_disconnect(m->phys_page) & VM_MEM_MODIFIED) {
+ if (pmap_disconnect(VM_PAGE_GET_PHYS_PAGE(m)) & VM_MEM_MODIFIED) {
SET_PAGE_DIRTY(m, FALSE);
} else {
- m->dirty = FALSE;
+ m->vmp_dirty = FALSE;
}
- if (m->dirty) {
- CLUSTER_STAT(vm_pageout_target_page_dirtied++;)
- vm_page_unwire(m, TRUE); /* reactivates */
+ if (m->vmp_dirty) {
+ vm_page_unwire(m, TRUE); /* reactivates */
VM_STAT_INCR(reactivations);
PAGE_WAKEUP_DONE(m);
} else {
- CLUSTER_STAT(vm_pageout_target_page_freed++;)
- vm_page_free(m);/* clears busy, etc. */
+ vm_page_free(m); /* clears busy, etc. */
}
vm_page_unlock_queues();
continue;
* If prep_pin_count is nonzero, then someone is using the
* page, so make it active.
*/
- if (!m->active && !m->inactive && !m->throttled && !m->private) {
- if (m->reference)
+ if ((m->vmp_q_state == VM_PAGE_NOT_ON_Q) && !m->vmp_private) {
+ if (m->vmp_reference) {
vm_page_activate(m);
- else
+ } else {
vm_page_deactivate(m);
+ }
}
- if (m->overwriting) {
+ if (m->vmp_overwriting) {
/*
* the (COPY_OUT_FROM == FALSE) request_page_list case
*/
- if (m->busy) {
+ if (m->vmp_busy) {
/*
- * We do not re-set m->dirty !
+ * We do not re-set m->vmp_dirty !
* The page was busy so no extraneous activity
* could have occurred. COPY_INTO is a read into the
* new pages. CLEAN_IN_PLACE does actually write
* will take care of resetting dirty. We clear the
* modify however for the Programmed I/O case.
*/
- pmap_clear_modify(m->phys_page);
+ pmap_clear_modify(VM_PAGE_GET_PHYS_PAGE(m));
- m->busy = FALSE;
- m->absent = FALSE;
+ m->vmp_busy = FALSE;
+ m->vmp_absent = FALSE;
} else {
/*
* alternate (COPY_OUT_FROM == FALSE) request_page_list case
* Occurs when the original page was wired
* at the time of the list request
*/
- assert(VM_PAGE_WIRED(m));
- vm_page_unwire(m, TRUE); /* reactivates */
+ assert(VM_PAGE_WIRED(m));
+ vm_page_unwire(m, TRUE); /* reactivates */
}
- m->overwriting = FALSE;
+ m->vmp_overwriting = FALSE;
} else {
- /*
- * Set the dirty state according to whether or not the page was
- * modified during the pageout. Note that we purposefully do
- * NOT call pmap_clear_modify since the page is still mapped.
- * If the page were to be dirtied between the 2 calls, this
- * this fact would be lost. This code is only necessary to
- * maintain statistics, since the pmap module is always
- * consulted if m->dirty is false.
- */
-#if MACH_CLUSTER_STATS
- m->dirty = pmap_is_modified(m->phys_page);
-
- if (m->dirty) vm_pageout_cluster_dirtied++;
- else vm_pageout_cluster_cleaned++;
- if (m->wanted) vm_pageout_cluster_collisions++;
-#else
- m->dirty = FALSE;
-#endif
+ m->vmp_dirty = FALSE;
}
- if (m->encrypted_cleaning == TRUE) {
- m->encrypted_cleaning = FALSE;
- m->busy = FALSE;
- }
- m->cleaning = FALSE;
+ m->vmp_cleaning = FALSE;
/*
* Wakeup any thread waiting for the page to be un-cleaning.
* must be locked.
*
*/
-void
+static void
vm_pageclean_setup(
- vm_page_t m,
- vm_page_t new_m,
- vm_object_t new_object,
- vm_object_offset_t new_offset)
+ vm_page_t m,
+ vm_page_t new_m,
+ vm_object_t new_object,
+ vm_object_offset_t new_offset)
{
- assert(!m->busy);
+ assert(!m->vmp_busy);
#if 0
- assert(!m->cleaning);
+ assert(!m->vmp_cleaning);
#endif
- XPR(XPR_VM_PAGEOUT,
- "vm_pageclean_setup, obj 0x%X off 0x%X page 0x%X new 0x%X new_off 0x%X\n",
- m->object, m->offset, m,
- new_m, new_offset);
-
- pmap_clear_modify(m->phys_page);
+ pmap_clear_modify(VM_PAGE_GET_PHYS_PAGE(m));
/*
* Mark original page as cleaning in place.
*/
- m->cleaning = TRUE;
+ m->vmp_cleaning = TRUE;
SET_PAGE_DIRTY(m, FALSE);
- m->precious = FALSE;
+ m->vmp_precious = FALSE;
/*
* Convert the fictitious page to a private shadow of
* the real page.
*/
- assert(new_m->fictitious);
- assert(new_m->phys_page == vm_page_fictitious_addr);
- new_m->fictitious = FALSE;
- new_m->private = TRUE;
- new_m->pageout = TRUE;
- new_m->phys_page = m->phys_page;
+ assert(new_m->vmp_fictitious);
+ assert(VM_PAGE_GET_PHYS_PAGE(new_m) == vm_page_fictitious_addr);
+ new_m->vmp_fictitious = FALSE;
+ new_m->vmp_private = TRUE;
+ new_m->vmp_free_when_done = TRUE;
+ VM_PAGE_SET_PHYS_PAGE(new_m, VM_PAGE_GET_PHYS_PAGE(m));
vm_page_lockspin_queues();
- vm_page_wire(new_m);
+ vm_page_wire(new_m, VM_KERN_MEMORY_NONE, TRUE);
vm_page_unlock_queues();
- vm_page_insert(new_m, new_object, new_offset);
- assert(!new_m->wanted);
- new_m->busy = FALSE;
+ vm_page_insert_wired(new_m, new_object, new_offset, VM_KERN_MEMORY_NONE);
+ assert(!new_m->vmp_wanted);
+ new_m->vmp_busy = FALSE;
}
/*
* Implementation:
* Move this page to a completely new object.
*/
-void
+void
vm_pageout_initialize_page(
- vm_page_t m)
+ vm_page_t m)
{
- vm_object_t object;
- vm_object_offset_t paging_offset;
- memory_object_t pager;
+ vm_object_t object;
+ vm_object_offset_t paging_offset;
+ memory_object_t pager;
+
+ assert(VM_CONFIG_COMPRESSOR_IS_PRESENT);
- XPR(XPR_VM_PAGEOUT,
- "vm_pageout_initialize_page, page 0x%X\n",
- m, 0, 0, 0, 0);
- assert(m->busy);
+ object = VM_PAGE_OBJECT(m);
+
+ assert(m->vmp_busy);
+ assert(object->internal);
/*
* Verify that we really want to clean this page
*/
- assert(!m->absent);
- assert(!m->error);
- assert(m->dirty);
+ assert(!m->vmp_absent);
+ assert(!m->vmp_error);
+ assert(m->vmp_dirty);
/*
* Create a paging reference to let us play with the object.
*/
- object = m->object;
- paging_offset = m->offset + object->paging_offset;
+ paging_offset = m->vmp_offset + object->paging_offset;
- if (m->absent || m->error || m->restart || (!m->dirty && !m->precious)) {
- VM_PAGE_FREE(m);
+ if (m->vmp_absent || m->vmp_error || m->vmp_restart || (!m->vmp_dirty && !m->vmp_precious)) {
panic("reservation without pageout?"); /* alan */
+
+ VM_PAGE_FREE(m);
vm_object_unlock(object);
return;
}
/*
- * If there's no pager, then we can't clean the page. This should
+ * If there's no pager, then we can't clean the page. This should
* never happen since this should be a copy object and therefore not
* an external object, so the pager should always be there.
*/
pager = object->pager;
if (pager == MEMORY_OBJECT_NULL) {
- VM_PAGE_FREE(m);
panic("missing pager for copy object");
+
+ VM_PAGE_FREE(m);
return;
}
/*
* set the page for future call to vm_fault_list_request
*/
- pmap_clear_modify(m->phys_page);
+ pmap_clear_modify(VM_PAGE_GET_PHYS_PAGE(m));
SET_PAGE_DIRTY(m, FALSE);
- m->pageout = TRUE;
/*
* keep the object from collapsing or terminating
vm_object_paging_end(object);
}
-#if MACH_CLUSTER_STATS
-#define MAXCLUSTERPAGES 16
-struct {
- unsigned long pages_in_cluster;
- unsigned long pages_at_higher_offsets;
- unsigned long pages_at_lower_offsets;
-} cluster_stats[MAXCLUSTERPAGES];
-#endif /* MACH_CLUSTER_STATS */
-
/*
* vm_pageout_cluster:
*
* The page must not be on any pageout queue.
*/
+#if DEVELOPMENT || DEBUG
+vmct_stats_t vmct_stats;
+
+int32_t vmct_active = 0;
+uint64_t vm_compressor_epoch_start = 0;
+uint64_t vm_compressor_epoch_stop = 0;
+
+typedef enum vmct_state_t {
+ VMCT_IDLE,
+ VMCT_AWAKENED,
+ VMCT_ACTIVE,
+} vmct_state_t;
+vmct_state_t vmct_state[MAX_COMPRESSOR_THREAD_COUNT];
+#endif
+
void
-vm_pageout_cluster(vm_page_t m, boolean_t pageout)
+vm_pageout_cluster(vm_page_t m)
{
- vm_object_t object = m->object;
- struct vm_pageout_queue *q;
-
-
- XPR(XPR_VM_PAGEOUT,
- "vm_pageout_cluster, object 0x%X offset 0x%X page 0x%X\n",
- object, m->offset, m, 0, 0);
+ vm_object_t object = VM_PAGE_OBJECT(m);
+ struct vm_pageout_queue *q;
VM_PAGE_CHECK(m);
-#if DEBUG
- lck_mtx_assert(&vm_page_queue_lock, LCK_MTX_ASSERT_OWNED);
-#endif
+ LCK_MTX_ASSERT(&vm_page_queue_lock, LCK_MTX_ASSERT_OWNED);
vm_object_lock_assert_exclusive(object);
/*
* Only a certain kind of page is appreciated here.
*/
- assert((m->dirty || m->precious) && (!VM_PAGE_WIRED(m)));
- assert(!m->cleaning && !m->pageout && !m->laundry);
-#ifndef CONFIG_FREEZE
- assert(!m->inactive && !m->active);
- assert(!m->throttled);
-#endif
+ assert((m->vmp_dirty || m->vmp_precious) && (!VM_PAGE_WIRED(m)));
+ assert(!m->vmp_cleaning && !m->vmp_laundry);
+ assert(m->vmp_q_state == VM_PAGE_NOT_ON_Q);
/*
* protect the object from collapse or termination
*/
vm_object_activity_begin(object);
- m->pageout = pageout;
-
if (object->internal == TRUE) {
- if (COMPRESSED_PAGER_IS_ACTIVE || DEFAULT_FREEZER_COMPRESSED_PAGER_IS_ACTIVE)
- m->busy = TRUE;
+ assert(VM_CONFIG_COMPRESSOR_IS_PRESENT);
- q = &vm_pageout_queue_internal;
- } else
- q = &vm_pageout_queue_external;
+ m->vmp_busy = TRUE;
+
+ q = &vm_pageout_queue_internal;
+ } else {
+ q = &vm_pageout_queue_external;
+ }
- /*
+ /*
* pgo_laundry count is tied to the laundry bit
*/
- m->laundry = TRUE;
+ m->vmp_laundry = TRUE;
q->pgo_laundry++;
- m->pageout_queue = TRUE;
- queue_enter(&q->pgo_pending, m, vm_page_t, pageq);
-
+ m->vmp_q_state = VM_PAGE_ON_PAGEOUT_Q;
+ vm_page_queue_enter(&q->pgo_pending, m, vmp_pageq);
+
if (q->pgo_idle == TRUE) {
q->pgo_idle = FALSE;
thread_wakeup((event_t) &q->pgo_pending);
}
-unsigned long vm_pageout_throttle_up_count = 0;
-
/*
- * A page is back from laundry or we are stealing it back from
+ * A page is back from laundry or we are stealing it back from
* the laundering state. See if there are some pages waiting to
* go to laundry and if we can let some of them go now.
*
*/
void
vm_pageout_throttle_up(
- vm_page_t m)
+ vm_page_t m)
{
- struct vm_pageout_queue *q;
-
- assert(m->object != VM_OBJECT_NULL);
- assert(m->object != kernel_object);
+ struct vm_pageout_queue *q;
+ vm_object_t m_object;
-#if DEBUG
- lck_mtx_assert(&vm_page_queue_lock, LCK_MTX_ASSERT_OWNED);
- vm_object_lock_assert_exclusive(m->object);
-#endif
+ m_object = VM_PAGE_OBJECT(m);
- vm_pageout_throttle_up_count++;
+ assert(m_object != VM_OBJECT_NULL);
+ assert(m_object != kernel_object);
- if (m->object->internal == TRUE)
- q = &vm_pageout_queue_internal;
- else
- q = &vm_pageout_queue_external;
+ LCK_MTX_ASSERT(&vm_page_queue_lock, LCK_MTX_ASSERT_OWNED);
+ vm_object_lock_assert_exclusive(m_object);
- if (m->pageout_queue == TRUE) {
+ if (m_object->internal == TRUE) {
+ q = &vm_pageout_queue_internal;
+ } else {
+ q = &vm_pageout_queue_external;
+ }
- queue_remove(&q->pgo_pending, m, vm_page_t, pageq);
- m->pageout_queue = FALSE;
+ if (m->vmp_q_state == VM_PAGE_ON_PAGEOUT_Q) {
+ vm_page_queue_remove(&q->pgo_pending, m, vmp_pageq);
+ m->vmp_q_state = VM_PAGE_NOT_ON_Q;
- m->pageq.next = NULL;
- m->pageq.prev = NULL;
+ VM_PAGE_ZERO_PAGEQ_ENTRY(m);
- vm_object_activity_end(m->object);
- }
- if (m->laundry == TRUE) {
+ vm_object_activity_end(m_object);
- m->laundry = FALSE;
- q->pgo_laundry--;
+ VM_PAGEOUT_DEBUG(vm_page_steal_pageout_page, 1);
+ }
+ if (m->vmp_laundry == TRUE) {
+ m->vmp_laundry = FALSE;
+ q->pgo_laundry--;
- if (q->pgo_throttled == TRUE) {
- q->pgo_throttled = FALSE;
- thread_wakeup((event_t) &q->pgo_laundry);
- }
- if (q->pgo_draining == TRUE && q->pgo_laundry == 0) {
- q->pgo_draining = FALSE;
- thread_wakeup((event_t) (&q->pgo_laundry+1));
- }
+ if (q->pgo_throttled == TRUE) {
+ q->pgo_throttled = FALSE;
+ thread_wakeup((event_t) &q->pgo_laundry);
+ }
+ if (q->pgo_draining == TRUE && q->pgo_laundry == 0) {
+ q->pgo_draining = FALSE;
+ thread_wakeup((event_t) (&q->pgo_laundry + 1));
+ }
+ VM_PAGEOUT_DEBUG(vm_pageout_throttle_up_count, 1);
}
}
static void
vm_pageout_throttle_up_batch(
struct vm_pageout_queue *q,
- int batch_cnt)
+ int batch_cnt)
{
-#if DEBUG
- lck_mtx_assert(&vm_page_queue_lock, LCK_MTX_ASSERT_OWNED);
-#endif
+ LCK_MTX_ASSERT(&vm_page_queue_lock, LCK_MTX_ASSERT_OWNED);
- vm_pageout_throttle_up_count += batch_cnt;
+ VM_PAGEOUT_DEBUG(vm_pageout_throttle_up_count, batch_cnt);
- q->pgo_laundry -= batch_cnt;
+ q->pgo_laundry -= batch_cnt;
- if (q->pgo_throttled == TRUE) {
- q->pgo_throttled = FALSE;
- thread_wakeup((event_t) &q->pgo_laundry);
- }
- if (q->pgo_draining == TRUE && q->pgo_laundry == 0) {
- q->pgo_draining = FALSE;
- thread_wakeup((event_t) (&q->pgo_laundry+1));
- }
+ if (q->pgo_throttled == TRUE) {
+ q->pgo_throttled = FALSE;
+ thread_wakeup((event_t) &q->pgo_laundry);
+ }
+ if (q->pgo_draining == TRUE && q->pgo_laundry == 0) {
+ q->pgo_draining = FALSE;
+ thread_wakeup((event_t) (&q->pgo_laundry + 1));
+ }
}
* also returns the number of pages the system still needs to reclaim at this
* moment in time.
*/
-#define VM_PAGEOUT_STAT_SIZE 31
+#if DEVELOPMENT || DEBUG
+#define VM_PAGEOUT_STAT_SIZE (30 * 8) + 1
+#else
+#define VM_PAGEOUT_STAT_SIZE (1 * 8) + 1
+#endif
struct vm_pageout_stat {
+ unsigned long vm_page_active_count;
+ unsigned long vm_page_speculative_count;
+ unsigned long vm_page_inactive_count;
+ unsigned long vm_page_anonymous_count;
+
+ unsigned long vm_page_free_count;
+ unsigned long vm_page_wire_count;
+ unsigned long vm_page_compressor_count;
+
+ unsigned long vm_page_pages_compressed;
+ unsigned long vm_page_pageable_internal_count;
+ unsigned long vm_page_pageable_external_count;
+ unsigned long vm_page_xpmapped_external_count;
+
+ unsigned int pages_grabbed;
+ unsigned int pages_freed;
+
+ unsigned int pages_compressed;
+ unsigned int pages_grabbed_by_compressor;
+ unsigned int failed_compressions;
+
+ unsigned int pages_evicted;
+ unsigned int pages_purged;
+
unsigned int considered;
- unsigned int reclaimed;
-} vm_pageout_stats[VM_PAGEOUT_STAT_SIZE] = {{0,0}, };
+ unsigned int considered_bq_internal;
+ unsigned int considered_bq_external;
+
+ unsigned int skipped_external;
+ unsigned int filecache_min_reactivations;
+
+ unsigned int freed_speculative;
+ unsigned int freed_cleaned;
+ unsigned int freed_internal;
+ unsigned int freed_external;
+
+ unsigned int cleaned_dirty_external;
+ unsigned int cleaned_dirty_internal;
+
+ unsigned int inactive_referenced;
+ unsigned int inactive_nolock;
+ unsigned int reactivation_limit_exceeded;
+ unsigned int forced_inactive_reclaim;
+
+ unsigned int throttled_internal_q;
+ unsigned int throttled_external_q;
+
+ unsigned int phantom_ghosts_found;
+ unsigned int phantom_ghosts_added;
+} vm_pageout_stats[VM_PAGEOUT_STAT_SIZE] = {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, };
+
unsigned int vm_pageout_stat_now = 0;
-unsigned int vm_memory_pressure = 0;
#define VM_PAGEOUT_STAT_BEFORE(i) \
(((i) == 0) ? VM_PAGEOUT_STAT_SIZE - 1 : (i) - 1)
(((i) == VM_PAGEOUT_STAT_SIZE - 1) ? 0 : (i) + 1)
#if VM_PAGE_BUCKETS_CHECK
-int vm_page_buckets_check_interval = 10; /* in seconds */
+int vm_page_buckets_check_interval = 80; /* in eighths of a second */
#endif /* VM_PAGE_BUCKETS_CHECK */
-/*
- * Called from compute_averages().
- */
+
void
-compute_memory_pressure(
- __unused void *arg)
+record_memory_pressure(void);
+void
+record_memory_pressure(void)
{
unsigned int vm_pageout_next;
}
#endif /* VM_PAGE_BUCKETS_CHECK */
- vm_memory_pressure =
- vm_pageout_stats[VM_PAGEOUT_STAT_BEFORE(vm_pageout_stat_now)].reclaimed;
+ vm_pageout_state.vm_memory_pressure =
+ vm_pageout_stats[VM_PAGEOUT_STAT_BEFORE(vm_pageout_stat_now)].freed_speculative +
+ vm_pageout_stats[VM_PAGEOUT_STAT_BEFORE(vm_pageout_stat_now)].freed_cleaned +
+ vm_pageout_stats[VM_PAGEOUT_STAT_BEFORE(vm_pageout_stat_now)].freed_internal +
+ vm_pageout_stats[VM_PAGEOUT_STAT_BEFORE(vm_pageout_stat_now)].freed_external;
- commpage_set_memory_pressure( vm_memory_pressure );
+ commpage_set_memory_pressure((unsigned int)vm_pageout_state.vm_memory_pressure );
/* move "now" forward */
vm_pageout_next = VM_PAGEOUT_STAT_AFTER(vm_pageout_stat_now);
- vm_pageout_stats[vm_pageout_next].considered = 0;
- vm_pageout_stats[vm_pageout_next].reclaimed = 0;
+
+ bzero(&vm_pageout_stats[vm_pageout_next], sizeof(struct vm_pageout_stat));
+
vm_pageout_stat_now = vm_pageout_next;
}
/*
* IMPORTANT
* mach_vm_ctl_page_free_wanted() is called indirectly, via
- * mach_vm_pressure_monitor(), when taking a stackshot. Therefore,
- * it must be safe in the restricted stackshot context. Locks and/or
+ * mach_vm_pressure_monitor(), when taking a stackshot. Therefore,
+ * it must be safe in the restricted stackshot context. Locks and/or
* blocking are not allowable.
*/
unsigned int
/*
* IMPORTANT:
- * mach_vm_pressure_monitor() is called when taking a stackshot, with
+ * mach_vm_pressure_monitor() is called when taking a stackshot, with
* wait_for_pressure FALSE, so that code path must remain safe in the
* restricted stackshot context. No blocking or locks are allowable.
* on that code path.
kern_return_t
mach_vm_pressure_monitor(
- boolean_t wait_for_pressure,
- unsigned int nsecs_monitored,
- unsigned int *pages_reclaimed_p,
- unsigned int *pages_wanted_p)
+ boolean_t wait_for_pressure,
+ unsigned int nsecs_monitored,
+ unsigned int *pages_reclaimed_p,
+ unsigned int *pages_wanted_p)
{
- wait_result_t wr;
- unsigned int vm_pageout_then, vm_pageout_now;
- unsigned int pages_reclaimed;
+ wait_result_t wr;
+ unsigned int vm_pageout_then, vm_pageout_now;
+ unsigned int pages_reclaimed;
+ unsigned int units_of_monitor;
+ units_of_monitor = 8 * nsecs_monitored;
/*
* We don't take the vm_page_queue_lock here because we don't want
* vm_pressure_monitor() to get in the way of the vm_pageout_scan()
/* wait until there's memory pressure */
while (vm_page_free_count >= vm_page_free_target) {
wr = assert_wait((event_t) &vm_page_free_wanted,
- THREAD_INTERRUPTIBLE);
+ THREAD_INTERRUPTIBLE);
if (wr == THREAD_WAITING) {
wr = thread_block(THREAD_CONTINUE_NULL);
}
}
/* provide number of pages reclaimed in the last "nsecs_monitored" */
- do {
- vm_pageout_now = vm_pageout_stat_now;
- pages_reclaimed = 0;
- for (vm_pageout_then =
- VM_PAGEOUT_STAT_BEFORE(vm_pageout_now);
- vm_pageout_then != vm_pageout_now &&
- nsecs_monitored-- != 0;
- vm_pageout_then =
- VM_PAGEOUT_STAT_BEFORE(vm_pageout_then)) {
- pages_reclaimed += vm_pageout_stats[vm_pageout_then].reclaimed;
- }
- } while (vm_pageout_now != vm_pageout_stat_now);
+ vm_pageout_now = vm_pageout_stat_now;
+ pages_reclaimed = 0;
+ for (vm_pageout_then =
+ VM_PAGEOUT_STAT_BEFORE(vm_pageout_now);
+ vm_pageout_then != vm_pageout_now &&
+ units_of_monitor-- != 0;
+ vm_pageout_then =
+ VM_PAGEOUT_STAT_BEFORE(vm_pageout_then)) {
+ pages_reclaimed += vm_pageout_stats[vm_pageout_then].freed_speculative;
+ pages_reclaimed += vm_pageout_stats[vm_pageout_then].freed_cleaned;
+ pages_reclaimed += vm_pageout_stats[vm_pageout_then].freed_internal;
+ pages_reclaimed += vm_pageout_stats[vm_pageout_then].freed_external;
+ }
*pages_reclaimed_p = pages_reclaimed;
return KERN_SUCCESS;
-/*
- * function in BSD to apply I/O throttle to the pageout thread
- */
-extern void vm_pageout_io_throttle(void);
-
+#if DEVELOPMENT || DEBUG
-#if LATENCY_JETSAM
-boolean_t jlp_init = FALSE;
-uint64_t jlp_time = 0, jlp_current = 0;
-struct vm_page jetsam_latency_page[NUM_OF_JETSAM_LATENCY_TOKENS];
-unsigned int latency_jetsam_wakeup = 0;
-#endif /* LATENCY_JETSAM */
+static void
+vm_pageout_disconnect_all_pages_in_queue(vm_page_queue_head_t *, int);
/*
- * Page States: Used below to maintain the page state
- * before it's removed from it's Q. This saved state
- * helps us do the right accounting in certain cases
+ * condition variable used to make sure there is
+ * only a single sweep going on at a time
*/
-#define PAGE_STATE_SPECULATIVE 1
-#define PAGE_STATE_ANONYMOUS 2
-#define PAGE_STATE_INACTIVE 3
-#define PAGE_STATE_INACTIVE_FIRST 4
-#define PAGE_STATE_CLEAN 5
-
-
-#define VM_PAGEOUT_SCAN_HANDLE_REUSABLE_PAGE(m) \
- MACRO_BEGIN \
- /* \
- * If a "reusable" page somehow made it back into \
- * the active queue, it's been re-used and is not \
- * quite re-usable. \
- * If the VM object was "all_reusable", consider it \
- * as "all re-used" instead of converting it to \
- * "partially re-used", which could be expensive. \
- */ \
- if ((m)->reusable || \
- (m)->object->all_reusable) { \
- vm_object_reuse_pages((m)->object, \
- (m)->offset, \
- (m)->offset + PAGE_SIZE_64, \
- FALSE); \
- } \
- MACRO_END
-
-
-#define VM_PAGEOUT_DELAYED_UNLOCK_LIMIT 64
-#define VM_PAGEOUT_DELAYED_UNLOCK_LIMIT_MAX 1024
-
-#define FCS_IDLE 0
-#define FCS_DELAYED 1
-#define FCS_DEADLOCK_DETECTED 2
-
-struct flow_control {
- int state;
- mach_timespec_t ts;
-};
-
-uint32_t vm_pageout_considered_page = 0;
-uint32_t vm_page_filecache_min = 0;
+boolean_t vm_pageout_disconnect_all_pages_active = FALSE;
-#define VM_PAGE_FILECACHE_MIN 50000
-#define ANONS_GRABBED_LIMIT 2
-/*
- * vm_pageout_scan does the dirty work for the pageout daemon.
- * It returns with both vm_page_queue_free_lock and vm_page_queue_lock
- * held and vm_page_free_wanted == 0.
- */
void
-vm_pageout_scan(void)
+vm_pageout_disconnect_all_pages()
{
- unsigned int loop_count = 0;
- unsigned int inactive_burst_count = 0;
- unsigned int active_burst_count = 0;
- unsigned int reactivated_this_call;
- unsigned int reactivate_limit;
- vm_page_t local_freeq = NULL;
- int local_freed = 0;
- int delayed_unlock;
- int delayed_unlock_limit = 0;
- int refmod_state = 0;
- int vm_pageout_deadlock_target = 0;
- struct vm_pageout_queue *iq;
- struct vm_pageout_queue *eq;
- struct vm_speculative_age_q *sq;
- struct flow_control flow_control = { 0, { 0, 0 } };
- boolean_t inactive_throttled = FALSE;
- boolean_t try_failed;
- mach_timespec_t ts;
- unsigned int msecs = 0;
- vm_object_t object;
- vm_object_t last_object_tried;
- uint32_t catch_up_count = 0;
- uint32_t inactive_reclaim_run;
- boolean_t forced_reclaim;
- boolean_t exceeded_burst_throttle;
- boolean_t grab_anonymous = FALSE;
- boolean_t force_anonymous = FALSE;
- int anons_grabbed = 0;
- int page_prev_state = 0;
- int cache_evict_throttle = 0;
- uint32_t vm_pageout_inactive_external_forced_reactivate_limit = 0;
- vm_pressure_level_t pressure_level;
-
- VM_DEBUG_EVENT(vm_pageout_scan, VM_PAGEOUT_SCAN, DBG_FUNC_START,
- vm_pageout_speculative_clean, vm_pageout_inactive_clean,
- vm_pageout_inactive_dirty_internal, vm_pageout_inactive_dirty_external);
-
-#if LATENCY_JETSAM
- if (jlp_init == FALSE) {
- int i=0;
- vm_page_t jlp;
- for(; i < NUM_OF_JETSAM_LATENCY_TOKENS; i++) {
- jlp = &jetsam_latency_page[i];
- jlp->fictitious = TRUE;
- jlp->offset = 0;
-
- }
- jlp = &jetsam_latency_page[0];
- queue_enter(&vm_page_queue_active, jlp, vm_page_t, pageq);
- jlp->active = TRUE;
+ vm_page_lock_queues();
- jlp->offset = mach_absolute_time();
- jlp_time = jlp->offset;
- jlp_current++;
- jlp_init = TRUE;
+ if (vm_pageout_disconnect_all_pages_active == TRUE) {
+ vm_page_unlock_queues();
+ return;
}
-#endif /* LATENCY_JETSAM */
+ vm_pageout_disconnect_all_pages_active = TRUE;
+ vm_page_unlock_queues();
- flow_control.state = FCS_IDLE;
- iq = &vm_pageout_queue_internal;
- eq = &vm_pageout_queue_external;
- sq = &vm_page_queue_speculative[VM_PAGE_SPECULATIVE_AGED_Q];
+ vm_pageout_disconnect_all_pages_in_queue(&vm_page_queue_throttled, vm_page_throttled_count);
+ vm_pageout_disconnect_all_pages_in_queue(&vm_page_queue_anonymous, vm_page_anonymous_count);
+ vm_pageout_disconnect_all_pages_in_queue(&vm_page_queue_active, vm_page_active_count);
+
+ vm_pageout_disconnect_all_pages_active = FALSE;
+}
- XPR(XPR_VM_PAGEOUT, "vm_pageout_scan\n", 0, 0, 0, 0, 0);
+void
+vm_pageout_disconnect_all_pages_in_queue(vm_page_queue_head_t *q, int qcount)
+{
+ vm_page_t m;
+ vm_object_t t_object = NULL;
+ vm_object_t l_object = NULL;
+ vm_object_t m_object = NULL;
+ int delayed_unlock = 0;
+ int try_failed_count = 0;
+ int disconnected_count = 0;
+ int paused_count = 0;
+ int object_locked_count = 0;
+
+ KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE, (MACHDBG_CODE(DBG_MACH_WORKINGSET, VM_DISCONNECT_ALL_PAGE_MAPPINGS)) | DBG_FUNC_START,
+ q, qcount, 0, 0, 0);
-
vm_page_lock_queues();
- delayed_unlock = 1; /* must be nonzero if Qs are locked, 0 if unlocked */
- /*
- * Calculate the max number of referenced pages on the inactive
- * queue that we will reactivate.
- */
- reactivated_this_call = 0;
- reactivate_limit = VM_PAGE_REACTIVATE_LIMIT(vm_page_active_count +
- vm_page_inactive_count);
- inactive_reclaim_run = 0;
+ while (qcount && !vm_page_queue_empty(q)) {
+ LCK_MTX_ASSERT(&vm_page_queue_lock, LCK_MTX_ASSERT_OWNED);
- vm_pageout_inactive_external_forced_reactivate_limit = vm_page_active_count + vm_page_inactive_count;
+ m = (vm_page_t) vm_page_queue_first(q);
+ m_object = VM_PAGE_OBJECT(m);
- /*
- * We want to gradually dribble pages from the active queue
- * to the inactive queue. If we let the inactive queue get
- * very small, and then suddenly dump many pages into it,
- * those pages won't get a sufficient chance to be referenced
- * before we start taking them from the inactive queue.
- *
- * We must limit the rate at which we send pages to the pagers
- * so that we don't tie up too many pages in the I/O queues.
- * We implement a throttling mechanism using the laundry count
- * to limit the number of pages outstanding to the default
- * and external pagers. We can bypass the throttles and look
- * for clean pages if the pageout queues don't drain in a timely
- * fashion since this may indicate that the pageout paths are
- * stalled waiting for memory, which only we can provide.
- */
+ /*
+ * check to see if we currently are working
+ * with the same object... if so, we've
+ * already got the lock
+ */
+ if (m_object != l_object) {
+ /*
+ * the object associated with candidate page is
+ * different from the one we were just working
+ * with... dump the lock if we still own it
+ */
+ if (l_object != NULL) {
+ vm_object_unlock(l_object);
+ l_object = NULL;
+ }
+ if (m_object != t_object) {
+ try_failed_count = 0;
+ }
+ /*
+ * Try to lock object; since we've alread got the
+ * page queues lock, we can only 'try' for this one.
+ * if the 'try' fails, we need to do a mutex_pause
+ * to allow the owner of the object lock a chance to
+ * run...
+ */
+ if (!vm_object_lock_try_scan(m_object)) {
+ if (try_failed_count > 20) {
+ goto reenter_pg_on_q;
+ }
+ vm_page_unlock_queues();
+ mutex_pause(try_failed_count++);
+ vm_page_lock_queues();
+ delayed_unlock = 0;
-Restart:
- assert(delayed_unlock!=0);
-
- /*
- * Recalculate vm_page_inactivate_target.
- */
- vm_page_inactive_target = VM_PAGE_INACTIVE_TARGET(vm_page_active_count +
- vm_page_inactive_count +
- vm_page_speculative_count);
+ paused_count++;
- vm_page_anonymous_min = vm_page_inactive_target / 20;
+ t_object = m_object;
+ continue;
+ }
+ object_locked_count++;
+ l_object = m_object;
+ }
+ if (!m_object->alive || m->vmp_cleaning || m->vmp_laundry || m->vmp_busy || m->vmp_absent || m->vmp_error || m->vmp_free_when_done) {
+ /*
+ * put it back on the head of its queue
+ */
+ goto reenter_pg_on_q;
+ }
+ if (m->vmp_pmapped == TRUE) {
+ pmap_disconnect(VM_PAGE_GET_PHYS_PAGE(m));
- /*
- * don't want to wake the pageout_scan thread up everytime we fall below
- * the targets... set a low water mark at 0.25% below the target
- */
- vm_page_inactive_min = vm_page_inactive_target - (vm_page_inactive_target / 400);
-
- if (vm_page_speculative_percentage > 50)
- vm_page_speculative_percentage = 50;
- else if (vm_page_speculative_percentage <= 0)
- vm_page_speculative_percentage = 1;
-
- vm_page_speculative_target = VM_PAGE_SPECULATIVE_TARGET(vm_page_active_count +
- vm_page_inactive_count);
-
- object = NULL;
- last_object_tried = NULL;
- try_failed = FALSE;
-
- if ((vm_page_inactive_count + vm_page_speculative_count) < VM_PAGE_INACTIVE_HEALTHY_LIMIT(vm_page_active_count))
- catch_up_count = vm_page_inactive_count + vm_page_speculative_count;
- else
- catch_up_count = 0;
-
- for (;;) {
- vm_page_t m;
+ disconnected_count++;
+ }
+reenter_pg_on_q:
+ vm_page_queue_remove(q, m, vmp_pageq);
+ vm_page_queue_enter(q, m, vmp_pageq);
- DTRACE_VM2(rev, int, 1, (uint64_t *), NULL);
+ qcount--;
+ try_failed_count = 0;
- if (delayed_unlock == 0) {
- vm_page_lock_queues();
- delayed_unlock = 1;
+ if (delayed_unlock++ > 128) {
+ if (l_object != NULL) {
+ vm_object_unlock(l_object);
+ l_object = NULL;
+ }
+ lck_mtx_yield(&vm_page_queue_lock);
+ delayed_unlock = 0;
}
- if (vm_upl_wait_for_pages < 0)
- vm_upl_wait_for_pages = 0;
+ }
+ if (l_object != NULL) {
+ vm_object_unlock(l_object);
+ l_object = NULL;
+ }
+ vm_page_unlock_queues();
- delayed_unlock_limit = VM_PAGEOUT_DELAYED_UNLOCK_LIMIT + vm_upl_wait_for_pages;
+ KERNEL_DEBUG_CONSTANT_IST(KDEBUG_TRACE, (MACHDBG_CODE(DBG_MACH_WORKINGSET, VM_DISCONNECT_ALL_PAGE_MAPPINGS)) | DBG_FUNC_END,
+ q, disconnected_count, object_locked_count, paused_count, 0);
+}
- if (delayed_unlock_limit > VM_PAGEOUT_DELAYED_UNLOCK_LIMIT_MAX)
- delayed_unlock_limit = VM_PAGEOUT_DELAYED_UNLOCK_LIMIT_MAX;
+#endif
+
+
+static void
+vm_pageout_page_queue(vm_page_queue_head_t *, int);
+
+/*
+ * condition variable used to make sure there is
+ * only a single sweep going on at a time
+ */
+boolean_t vm_pageout_anonymous_pages_active = FALSE;
+
+
+void
+vm_pageout_anonymous_pages()
+{
+ if (VM_CONFIG_COMPRESSOR_IS_PRESENT) {
+ vm_page_lock_queues();
+
+ if (vm_pageout_anonymous_pages_active == TRUE) {
+ vm_page_unlock_queues();
+ return;
+ }
+ vm_pageout_anonymous_pages_active = TRUE;
+ vm_page_unlock_queues();
+
+ vm_pageout_page_queue(&vm_page_queue_throttled, vm_page_throttled_count);
+ vm_pageout_page_queue(&vm_page_queue_anonymous, vm_page_anonymous_count);
+ vm_pageout_page_queue(&vm_page_queue_active, vm_page_active_count);
+
+ if (VM_CONFIG_SWAP_IS_PRESENT) {
+ vm_consider_swapping();
+ }
+
+ vm_page_lock_queues();
+ vm_pageout_anonymous_pages_active = FALSE;
+ vm_page_unlock_queues();
+ }
+}
+
+
+void
+vm_pageout_page_queue(vm_page_queue_head_t *q, int qcount)
+{
+ vm_page_t m;
+ vm_object_t t_object = NULL;
+ vm_object_t l_object = NULL;
+ vm_object_t m_object = NULL;
+ int delayed_unlock = 0;
+ int try_failed_count = 0;
+ int refmod_state;
+ int pmap_options;
+ struct vm_pageout_queue *iq;
+ ppnum_t phys_page;
+
+
+ iq = &vm_pageout_queue_internal;
+
+ vm_page_lock_queues();
+
+ while (qcount && !vm_page_queue_empty(q)) {
+ LCK_MTX_ASSERT(&vm_page_queue_lock, LCK_MTX_ASSERT_OWNED);
+
+ if (VM_PAGE_Q_THROTTLED(iq)) {
+ if (l_object != NULL) {
+ vm_object_unlock(l_object);
+ l_object = NULL;
+ }
+ iq->pgo_draining = TRUE;
+
+ assert_wait((event_t) (&iq->pgo_laundry + 1), THREAD_INTERRUPTIBLE);
+ vm_page_unlock_queues();
+
+ thread_block(THREAD_CONTINUE_NULL);
+
+ vm_page_lock_queues();
+ delayed_unlock = 0;
+ continue;
+ }
+ m = (vm_page_t) vm_page_queue_first(q);
+ m_object = VM_PAGE_OBJECT(m);
+
+ /*
+ * check to see if we currently are working
+ * with the same object... if so, we've
+ * already got the lock
+ */
+ if (m_object != l_object) {
+ if (!m_object->internal) {
+ goto reenter_pg_on_q;
+ }
+
+ /*
+ * the object associated with candidate page is
+ * different from the one we were just working
+ * with... dump the lock if we still own it
+ */
+ if (l_object != NULL) {
+ vm_object_unlock(l_object);
+ l_object = NULL;
+ }
+ if (m_object != t_object) {
+ try_failed_count = 0;
+ }
+
+ /*
+ * Try to lock object; since we've alread got the
+ * page queues lock, we can only 'try' for this one.
+ * if the 'try' fails, we need to do a mutex_pause
+ * to allow the owner of the object lock a chance to
+ * run...
+ */
+ if (!vm_object_lock_try_scan(m_object)) {
+ if (try_failed_count > 20) {
+ goto reenter_pg_on_q;
+ }
+ vm_page_unlock_queues();
+ mutex_pause(try_failed_count++);
+ vm_page_lock_queues();
+ delayed_unlock = 0;
+
+ t_object = m_object;
+ continue;
+ }
+ l_object = m_object;
+ }
+ if (!m_object->alive || m->vmp_cleaning || m->vmp_laundry || m->vmp_busy || m->vmp_absent || m->vmp_error || m->vmp_free_when_done) {
+ /*
+ * page is not to be cleaned
+ * put it back on the head of its queue
+ */
+ goto reenter_pg_on_q;
+ }
+ phys_page = VM_PAGE_GET_PHYS_PAGE(m);
+
+ if (m->vmp_reference == FALSE && m->vmp_pmapped == TRUE) {
+ refmod_state = pmap_get_refmod(phys_page);
+
+ if (refmod_state & VM_MEM_REFERENCED) {
+ m->vmp_reference = TRUE;
+ }
+ if (refmod_state & VM_MEM_MODIFIED) {
+ SET_PAGE_DIRTY(m, FALSE);
+ }
+ }
+ if (m->vmp_reference == TRUE) {
+ m->vmp_reference = FALSE;
+ pmap_clear_refmod_options(phys_page, VM_MEM_REFERENCED, PMAP_OPTIONS_NOFLUSH, (void *)NULL);
+ goto reenter_pg_on_q;
+ }
+ if (m->vmp_pmapped == TRUE) {
+ if (m->vmp_dirty || m->vmp_precious) {
+ pmap_options = PMAP_OPTIONS_COMPRESSOR;
+ } else {
+ pmap_options = PMAP_OPTIONS_COMPRESSOR_IFF_MODIFIED;
+ }
+ refmod_state = pmap_disconnect_options(phys_page, pmap_options, NULL);
+ if (refmod_state & VM_MEM_MODIFIED) {
+ SET_PAGE_DIRTY(m, FALSE);
+ }
+ }
+
+ if (!m->vmp_dirty && !m->vmp_precious) {
+ vm_page_unlock_queues();
+ VM_PAGE_FREE(m);
+ vm_page_lock_queues();
+ delayed_unlock = 0;
+
+ goto next_pg;
+ }
+ if (!m_object->pager_initialized || m_object->pager == MEMORY_OBJECT_NULL) {
+ if (!m_object->pager_initialized) {
+ vm_page_unlock_queues();
+
+ vm_object_collapse(m_object, (vm_object_offset_t) 0, TRUE);
+
+ if (!m_object->pager_initialized) {
+ vm_object_compressor_pager_create(m_object);
+ }
+
+ vm_page_lock_queues();
+ delayed_unlock = 0;
+ }
+ if (!m_object->pager_initialized || m_object->pager == MEMORY_OBJECT_NULL) {
+ goto reenter_pg_on_q;
+ }
+ /*
+ * vm_object_compressor_pager_create will drop the object lock
+ * which means 'm' may no longer be valid to use
+ */
+ continue;
+ }
+ /*
+ * we've already factored out pages in the laundry which
+ * means this page can't be on the pageout queue so it's
+ * safe to do the vm_page_queues_remove
+ */
+ vm_page_queues_remove(m, TRUE);
+
+ LCK_MTX_ASSERT(&vm_page_queue_lock, LCK_MTX_ASSERT_OWNED);
+
+ vm_pageout_cluster(m);
+
+ goto next_pg;
+
+reenter_pg_on_q:
+ vm_page_queue_remove(q, m, vmp_pageq);
+ vm_page_queue_enter(q, m, vmp_pageq);
+next_pg:
+ qcount--;
+ try_failed_count = 0;
+
+ if (delayed_unlock++ > 128) {
+ if (l_object != NULL) {
+ vm_object_unlock(l_object);
+ l_object = NULL;
+ }
+ lck_mtx_yield(&vm_page_queue_lock);
+ delayed_unlock = 0;
+ }
+ }
+ if (l_object != NULL) {
+ vm_object_unlock(l_object);
+ l_object = NULL;
+ }
+ vm_page_unlock_queues();
+}
+
+
+
+/*
+ * function in BSD to apply I/O throttle to the pageout thread
+ */
+extern void vm_pageout_io_throttle(void);
+
+#define VM_PAGEOUT_SCAN_HANDLE_REUSABLE_PAGE(m, obj) \
+ MACRO_BEGIN \
+ /* \
+ * If a "reusable" page somehow made it back into \
+ * the active queue, it's been re-used and is not \
+ * quite re-usable. \
+ * If the VM object was "all_reusable", consider it \
+ * as "all re-used" instead of converting it to \
+ * "partially re-used", which could be expensive. \
+ */ \
+ assert(VM_PAGE_OBJECT((m)) == (obj)); \
+ if ((m)->vmp_reusable || \
+ (obj)->all_reusable) { \
+ vm_object_reuse_pages((obj), \
+ (m)->vmp_offset, \
+ (m)->vmp_offset + PAGE_SIZE_64, \
+ FALSE); \
+ } \
+ MACRO_END
+
+
+#define VM_PAGEOUT_DELAYED_UNLOCK_LIMIT 64
+#define VM_PAGEOUT_DELAYED_UNLOCK_LIMIT_MAX 1024
+
+#define FCS_IDLE 0
+#define FCS_DELAYED 1
+#define FCS_DEADLOCK_DETECTED 2
+
+struct flow_control {
+ int state;
+ mach_timespec_t ts;
+};
+
+
+#if CONFIG_BACKGROUND_QUEUE
+uint64_t vm_pageout_rejected_bq_internal = 0;
+uint64_t vm_pageout_rejected_bq_external = 0;
+uint64_t vm_pageout_skipped_bq_internal = 0;
+#endif
+
+#define ANONS_GRABBED_LIMIT 2
+
+
+#if 0
+static void vm_pageout_delayed_unlock(int *, int *, vm_page_t *);
+#endif
+static void vm_pageout_prepare_to_block(vm_object_t *, int *, vm_page_t *, int *, int);
+
+#define VM_PAGEOUT_PB_NO_ACTION 0
+#define VM_PAGEOUT_PB_CONSIDER_WAKING_COMPACTOR_SWAPPER 1
+#define VM_PAGEOUT_PB_THREAD_YIELD 2
+
+
+#if 0
+static void
+vm_pageout_delayed_unlock(int *delayed_unlock, int *local_freed, vm_page_t *local_freeq)
+{
+ if (*local_freeq) {
+ vm_page_unlock_queues();
+
+ VM_DEBUG_CONSTANT_EVENT(
+ vm_pageout_freelist, VM_PAGEOUT_FREELIST, DBG_FUNC_START,
+ vm_page_free_count, 0, 0, 1);
+
+ vm_page_free_list(*local_freeq, TRUE);
+
+ VM_DEBUG_CONSTANT_EVENT(vm_pageout_freelist, VM_PAGEOUT_FREELIST, DBG_FUNC_END,
+ vm_page_free_count, *local_freed, 0, 1);
+
+ *local_freeq = NULL;
+ *local_freed = 0;
+
+ vm_page_lock_queues();
+ } else {
+ lck_mtx_yield(&vm_page_queue_lock);
+ }
+ *delayed_unlock = 1;
+}
+#endif
+
+
+static void
+vm_pageout_prepare_to_block(vm_object_t *object, int *delayed_unlock,
+ vm_page_t *local_freeq, int *local_freed, int action)
+{
+ vm_page_unlock_queues();
+
+ if (*object != NULL) {
+ vm_object_unlock(*object);
+ *object = NULL;
+ }
+ if (*local_freeq) {
+ vm_page_free_list(*local_freeq, TRUE);
+
+ *local_freeq = NULL;
+ *local_freed = 0;
+ }
+ *delayed_unlock = 1;
+
+ switch (action) {
+ case VM_PAGEOUT_PB_CONSIDER_WAKING_COMPACTOR_SWAPPER:
+ vm_consider_waking_compactor_swapper();
+ break;
+ case VM_PAGEOUT_PB_THREAD_YIELD:
+ thread_yield_internal(1);
+ break;
+ case VM_PAGEOUT_PB_NO_ACTION:
+ default:
+ break;
+ }
+ vm_page_lock_queues();
+}
+
+
+static struct vm_pageout_vminfo last;
+
+uint64_t last_vm_page_pages_grabbed = 0;
+
+extern uint32_t c_segment_pages_compressed;
+
+extern uint64_t shared_region_pager_reclaimed;
+extern struct memory_object_pager_ops shared_region_pager_ops;
+
+void
+update_vm_info(void)
+{
+ unsigned long tmp;
+ uint64_t tmp64;
+
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_active_count = vm_page_active_count;
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_speculative_count = vm_page_speculative_count;
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_inactive_count = vm_page_inactive_count;
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_anonymous_count = vm_page_anonymous_count;
+
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_free_count = vm_page_free_count;
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_wire_count = vm_page_wire_count;
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_compressor_count = VM_PAGE_COMPRESSOR_COUNT;
+
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_pages_compressed = c_segment_pages_compressed;
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_pageable_internal_count = vm_page_pageable_internal_count;
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_pageable_external_count = vm_page_pageable_external_count;
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_xpmapped_external_count = vm_page_xpmapped_external_count;
+
+
+ tmp = vm_pageout_vminfo.vm_pageout_considered_page;
+ vm_pageout_stats[vm_pageout_stat_now].considered = (unsigned int)(tmp - last.vm_pageout_considered_page);
+ last.vm_pageout_considered_page = tmp;
+
+ tmp64 = vm_pageout_vminfo.vm_pageout_compressions;
+ vm_pageout_stats[vm_pageout_stat_now].pages_compressed = (unsigned int)(tmp64 - last.vm_pageout_compressions);
+ last.vm_pageout_compressions = tmp64;
+
+ tmp = vm_pageout_vminfo.vm_compressor_failed;
+ vm_pageout_stats[vm_pageout_stat_now].failed_compressions = (unsigned int)(tmp - last.vm_compressor_failed);
+ last.vm_compressor_failed = tmp;
+
+ tmp64 = vm_pageout_vminfo.vm_compressor_pages_grabbed;
+ vm_pageout_stats[vm_pageout_stat_now].pages_grabbed_by_compressor = (unsigned int)(tmp64 - last.vm_compressor_pages_grabbed);
+ last.vm_compressor_pages_grabbed = tmp64;
+
+ tmp = vm_pageout_vminfo.vm_phantom_cache_found_ghost;
+ vm_pageout_stats[vm_pageout_stat_now].phantom_ghosts_found = (unsigned int)(tmp - last.vm_phantom_cache_found_ghost);
+ last.vm_phantom_cache_found_ghost = tmp;
+
+ tmp = vm_pageout_vminfo.vm_phantom_cache_added_ghost;
+ vm_pageout_stats[vm_pageout_stat_now].phantom_ghosts_added = (unsigned int)(tmp - last.vm_phantom_cache_added_ghost);
+ last.vm_phantom_cache_added_ghost = tmp;
+
+ tmp64 = get_pages_grabbed_count();
+ vm_pageout_stats[vm_pageout_stat_now].pages_grabbed = (unsigned int)(tmp64 - last_vm_page_pages_grabbed);
+ last_vm_page_pages_grabbed = tmp64;
+
+ tmp = vm_pageout_vminfo.vm_page_pages_freed;
+ vm_pageout_stats[vm_pageout_stat_now].pages_freed = (unsigned int)(tmp - last.vm_page_pages_freed);
+ last.vm_page_pages_freed = tmp;
+
+
+ if (vm_pageout_stats[vm_pageout_stat_now].considered) {
+ tmp = vm_pageout_vminfo.vm_pageout_pages_evicted;
+ vm_pageout_stats[vm_pageout_stat_now].pages_evicted = (unsigned int)(tmp - last.vm_pageout_pages_evicted);
+ last.vm_pageout_pages_evicted = tmp;
+
+ tmp = vm_pageout_vminfo.vm_pageout_pages_purged;
+ vm_pageout_stats[vm_pageout_stat_now].pages_purged = (unsigned int)(tmp - last.vm_pageout_pages_purged);
+ last.vm_pageout_pages_purged = tmp;
+
+ tmp = vm_pageout_vminfo.vm_pageout_freed_speculative;
+ vm_pageout_stats[vm_pageout_stat_now].freed_speculative = (unsigned int)(tmp - last.vm_pageout_freed_speculative);
+ last.vm_pageout_freed_speculative = tmp;
+
+ tmp = vm_pageout_vminfo.vm_pageout_freed_external;
+ vm_pageout_stats[vm_pageout_stat_now].freed_external = (unsigned int)(tmp - last.vm_pageout_freed_external);
+ last.vm_pageout_freed_external = tmp;
+
+ tmp = vm_pageout_vminfo.vm_pageout_inactive_referenced;
+ vm_pageout_stats[vm_pageout_stat_now].inactive_referenced = (unsigned int)(tmp - last.vm_pageout_inactive_referenced);
+ last.vm_pageout_inactive_referenced = tmp;
+
+ tmp = vm_pageout_vminfo.vm_pageout_scan_inactive_throttled_external;
+ vm_pageout_stats[vm_pageout_stat_now].throttled_external_q = (unsigned int)(tmp - last.vm_pageout_scan_inactive_throttled_external);
+ last.vm_pageout_scan_inactive_throttled_external = tmp;
+
+ tmp = vm_pageout_vminfo.vm_pageout_inactive_dirty_external;
+ vm_pageout_stats[vm_pageout_stat_now].cleaned_dirty_external = (unsigned int)(tmp - last.vm_pageout_inactive_dirty_external);
+ last.vm_pageout_inactive_dirty_external = tmp;
+
+ tmp = vm_pageout_vminfo.vm_pageout_freed_cleaned;
+ vm_pageout_stats[vm_pageout_stat_now].freed_cleaned = (unsigned int)(tmp - last.vm_pageout_freed_cleaned);
+ last.vm_pageout_freed_cleaned = tmp;
+
+ tmp = vm_pageout_vminfo.vm_pageout_inactive_nolock;
+ vm_pageout_stats[vm_pageout_stat_now].inactive_nolock = (unsigned int)(tmp - last.vm_pageout_inactive_nolock);
+ last.vm_pageout_inactive_nolock = tmp;
+
+ tmp = vm_pageout_vminfo.vm_pageout_scan_inactive_throttled_internal;
+ vm_pageout_stats[vm_pageout_stat_now].throttled_internal_q = (unsigned int)(tmp - last.vm_pageout_scan_inactive_throttled_internal);
+ last.vm_pageout_scan_inactive_throttled_internal = tmp;
+
+ tmp = vm_pageout_vminfo.vm_pageout_skipped_external;
+ vm_pageout_stats[vm_pageout_stat_now].skipped_external = (unsigned int)(tmp - last.vm_pageout_skipped_external);
+ last.vm_pageout_skipped_external = tmp;
+
+ tmp = vm_pageout_vminfo.vm_pageout_reactivation_limit_exceeded;
+ vm_pageout_stats[vm_pageout_stat_now].reactivation_limit_exceeded = (unsigned int)(tmp - last.vm_pageout_reactivation_limit_exceeded);
+ last.vm_pageout_reactivation_limit_exceeded = tmp;
+
+ tmp = vm_pageout_vminfo.vm_pageout_inactive_force_reclaim;
+ vm_pageout_stats[vm_pageout_stat_now].forced_inactive_reclaim = (unsigned int)(tmp - last.vm_pageout_inactive_force_reclaim);
+ last.vm_pageout_inactive_force_reclaim = tmp;
+
+ tmp = vm_pageout_vminfo.vm_pageout_freed_internal;
+ vm_pageout_stats[vm_pageout_stat_now].freed_internal = (unsigned int)(tmp - last.vm_pageout_freed_internal);
+ last.vm_pageout_freed_internal = tmp;
+
+ tmp = vm_pageout_vminfo.vm_pageout_considered_bq_internal;
+ vm_pageout_stats[vm_pageout_stat_now].considered_bq_internal = (unsigned int)(tmp - last.vm_pageout_considered_bq_internal);
+ last.vm_pageout_considered_bq_internal = tmp;
+
+ tmp = vm_pageout_vminfo.vm_pageout_considered_bq_external;
+ vm_pageout_stats[vm_pageout_stat_now].considered_bq_external = (unsigned int)(tmp - last.vm_pageout_considered_bq_external);
+ last.vm_pageout_considered_bq_external = tmp;
+
+ tmp = vm_pageout_vminfo.vm_pageout_filecache_min_reactivated;
+ vm_pageout_stats[vm_pageout_stat_now].filecache_min_reactivations = (unsigned int)(tmp - last.vm_pageout_filecache_min_reactivated);
+ last.vm_pageout_filecache_min_reactivated = tmp;
+
+ tmp = vm_pageout_vminfo.vm_pageout_inactive_dirty_internal;
+ vm_pageout_stats[vm_pageout_stat_now].cleaned_dirty_internal = (unsigned int)(tmp - last.vm_pageout_inactive_dirty_internal);
+ last.vm_pageout_inactive_dirty_internal = tmp;
+ }
+
+ KERNEL_DEBUG_CONSTANT((MACHDBG_CODE(DBG_MACH_VM, VM_INFO1)) | DBG_FUNC_NONE,
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_active_count,
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_speculative_count,
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_inactive_count,
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_anonymous_count,
+ 0);
+
+ KERNEL_DEBUG_CONSTANT((MACHDBG_CODE(DBG_MACH_VM, VM_INFO2)) | DBG_FUNC_NONE,
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_free_count,
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_wire_count,
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_compressor_count,
+ 0,
+ 0);
+
+ KERNEL_DEBUG_CONSTANT((MACHDBG_CODE(DBG_MACH_VM, VM_INFO3)) | DBG_FUNC_NONE,
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_pages_compressed,
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_pageable_internal_count,
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_pageable_external_count,
+ vm_pageout_stats[vm_pageout_stat_now].vm_page_xpmapped_external_count,
+ 0);
+
+ if (vm_pageout_stats[vm_pageout_stat_now].considered ||
+ vm_pageout_stats[vm_pageout_stat_now].pages_compressed ||
+ vm_pageout_stats[vm_pageout_stat_now].failed_compressions) {
+ KERNEL_DEBUG_CONSTANT((MACHDBG_CODE(DBG_MACH_VM, VM_INFO4)) | DBG_FUNC_NONE,
+ vm_pageout_stats[vm_pageout_stat_now].considered,
+ vm_pageout_stats[vm_pageout_stat_now].freed_speculative,
+ vm_pageout_stats[vm_pageout_stat_now].freed_external,
+ vm_pageout_stats[vm_pageout_stat_now].inactive_referenced,
+ 0);
+
+ KERNEL_DEBUG_CONSTANT((MACHDBG_CODE(DBG_MACH_VM, VM_INFO5)) | DBG_FUNC_NONE,
+ vm_pageout_stats[vm_pageout_stat_now].throttled_external_q,
+ vm_pageout_stats[vm_pageout_stat_now].cleaned_dirty_external,
+ vm_pageout_stats[vm_pageout_stat_now].freed_cleaned,
+ vm_pageout_stats[vm_pageout_stat_now].inactive_nolock,
+ 0);
+
+ KERNEL_DEBUG_CONSTANT((MACHDBG_CODE(DBG_MACH_VM, VM_INFO6)) | DBG_FUNC_NONE,
+ vm_pageout_stats[vm_pageout_stat_now].throttled_internal_q,
+ vm_pageout_stats[vm_pageout_stat_now].pages_compressed,
+ vm_pageout_stats[vm_pageout_stat_now].pages_grabbed_by_compressor,
+ vm_pageout_stats[vm_pageout_stat_now].skipped_external,
+ 0);
+
+ KERNEL_DEBUG_CONSTANT((MACHDBG_CODE(DBG_MACH_VM, VM_INFO7)) | DBG_FUNC_NONE,
+ vm_pageout_stats[vm_pageout_stat_now].reactivation_limit_exceeded,
+ vm_pageout_stats[vm_pageout_stat_now].forced_inactive_reclaim,
+ vm_pageout_stats[vm_pageout_stat_now].failed_compressions,
+ vm_pageout_stats[vm_pageout_stat_now].freed_internal,
+ 0);
+
+ KERNEL_DEBUG_CONSTANT((MACHDBG_CODE(DBG_MACH_VM, VM_INFO8)) | DBG_FUNC_NONE,
+ vm_pageout_stats[vm_pageout_stat_now].considered_bq_internal,
+ vm_pageout_stats[vm_pageout_stat_now].considered_bq_external,
+ vm_pageout_stats[vm_pageout_stat_now].filecache_min_reactivations,
+ vm_pageout_stats[vm_pageout_stat_now].cleaned_dirty_internal,
+ 0);
+ }
+ KERNEL_DEBUG_CONSTANT((MACHDBG_CODE(DBG_MACH_VM, VM_INFO9)) | DBG_FUNC_NONE,
+ vm_pageout_stats[vm_pageout_stat_now].pages_grabbed,
+ vm_pageout_stats[vm_pageout_stat_now].pages_freed,
+ vm_pageout_stats[vm_pageout_stat_now].phantom_ghosts_found,
+ vm_pageout_stats[vm_pageout_stat_now].phantom_ghosts_added,
+ 0);
+
+ record_memory_pressure();
+}
+
+extern boolean_t hibernation_vmqueues_inspection;
+
+/*
+ * Return values for functions called by vm_pageout_scan
+ * that control its flow.
+ *
+ * PROCEED -- vm_pageout_scan will keep making forward progress.
+ * DONE_RETURN -- page demand satisfied, work is done -> vm_pageout_scan returns.
+ * NEXT_ITERATION -- restart the 'for' loop in vm_pageout_scan aka continue.
+ */
+
+#define VM_PAGEOUT_SCAN_PROCEED (0)
+#define VM_PAGEOUT_SCAN_DONE_RETURN (1)
+#define VM_PAGEOUT_SCAN_NEXT_ITERATION (2)
+
+/*
+ * This function is called only from vm_pageout_scan and
+ * it moves overflow secluded pages (one-at-a-time) to the
+ * batched 'local' free Q or active Q.
+ */
+static void
+vps_deal_with_secluded_page_overflow(vm_page_t *local_freeq, int *local_freed)
+{
+#if CONFIG_SECLUDED_MEMORY
+ /*
+ * Deal with secluded_q overflow.
+ */
+ if (vm_page_secluded_count > vm_page_secluded_target) {
+ vm_page_t secluded_page;
+
+ /*
+ * SECLUDED_AGING_BEFORE_ACTIVE:
+ * Excess secluded pages go to the active queue and
+ * will later go to the inactive queue.
+ */
+ assert((vm_page_secluded_count_free +
+ vm_page_secluded_count_inuse) ==
+ vm_page_secluded_count);
+ secluded_page = (vm_page_t)vm_page_queue_first(&vm_page_queue_secluded);
+ assert(secluded_page->vmp_q_state == VM_PAGE_ON_SECLUDED_Q);
+
+ vm_page_queues_remove(secluded_page, FALSE);
+ assert(!secluded_page->vmp_fictitious);
+ assert(!VM_PAGE_WIRED(secluded_page));
+
+ if (secluded_page->vmp_object == 0) {
+ /* transfer to free queue */
+ assert(secluded_page->vmp_busy);
+ secluded_page->vmp_snext = *local_freeq;
+ *local_freeq = secluded_page;
+ *local_freed += 1;
+ } else {
+ /* transfer to head of active queue */
+ vm_page_enqueue_active(secluded_page, FALSE);
+ secluded_page = VM_PAGE_NULL;
+ }
+ }
+#else /* CONFIG_SECLUDED_MEMORY */
+
+#pragma unused(local_freeq)
+#pragma unused(local_freed)
+
+ return;
+
+#endif /* CONFIG_SECLUDED_MEMORY */
+}
+
+/*
+ * This function is called only from vm_pageout_scan and
+ * it initializes the loop targets for vm_pageout_scan().
+ */
+static void
+vps_init_page_targets(void)
+{
+ /*
+ * LD TODO: Other page targets should be calculated here too.
+ */
+ vm_page_anonymous_min = vm_page_inactive_target / 20;
+
+ if (vm_pageout_state.vm_page_speculative_percentage > 50) {
+ vm_pageout_state.vm_page_speculative_percentage = 50;
+ } else if (vm_pageout_state.vm_page_speculative_percentage <= 0) {
+ vm_pageout_state.vm_page_speculative_percentage = 1;
+ }
+
+ vm_pageout_state.vm_page_speculative_target = VM_PAGE_SPECULATIVE_TARGET(vm_page_active_count +
+ vm_page_inactive_count);
+}
+
+/*
+ * This function is called only from vm_pageout_scan and
+ * it purges a single VM object at-a-time and will either
+ * make vm_pageout_scan() restart the loop or keeping moving forward.
+ */
+static int
+vps_purge_object()
+{
+ int force_purge;
+
+ assert(available_for_purge >= 0);
+ force_purge = 0; /* no force-purging */
+
+#if VM_PRESSURE_EVENTS
+ vm_pressure_level_t pressure_level;
+
+ pressure_level = memorystatus_vm_pressure_level;
+
+ if (pressure_level > kVMPressureNormal) {
+ if (pressure_level >= kVMPressureCritical) {
+ force_purge = vm_pageout_state.memorystatus_purge_on_critical;
+ } else if (pressure_level >= kVMPressureUrgent) {
+ force_purge = vm_pageout_state.memorystatus_purge_on_urgent;
+ } else if (pressure_level >= kVMPressureWarning) {
+ force_purge = vm_pageout_state.memorystatus_purge_on_warning;
+ }
+ }
+#endif /* VM_PRESSURE_EVENTS */
+
+ if (available_for_purge || force_purge) {
+ memoryshot(VM_PAGEOUT_PURGEONE, DBG_FUNC_START);
+
+ VM_DEBUG_EVENT(vm_pageout_purgeone, VM_PAGEOUT_PURGEONE, DBG_FUNC_START, vm_page_free_count, 0, 0, 0);
+ if (vm_purgeable_object_purge_one(force_purge, C_DONT_BLOCK)) {
+ VM_PAGEOUT_DEBUG(vm_pageout_purged_objects, 1);
+ VM_DEBUG_EVENT(vm_pageout_purgeone, VM_PAGEOUT_PURGEONE, DBG_FUNC_END, vm_page_free_count, 0, 0, 0);
+ memoryshot(VM_PAGEOUT_PURGEONE, DBG_FUNC_END);
+
+ return VM_PAGEOUT_SCAN_NEXT_ITERATION;
+ }
+ VM_DEBUG_EVENT(vm_pageout_purgeone, VM_PAGEOUT_PURGEONE, DBG_FUNC_END, 0, 0, 0, -1);
+ memoryshot(VM_PAGEOUT_PURGEONE, DBG_FUNC_END);
+ }
+
+ return VM_PAGEOUT_SCAN_PROCEED;
+}
+
+/*
+ * This function is called only from vm_pageout_scan and
+ * it will try to age the next speculative Q if the oldest
+ * one is empty.
+ */
+static int
+vps_age_speculative_queue(boolean_t force_speculative_aging)
+{
+#define DELAY_SPECULATIVE_AGE 1000
+
+ /*
+ * try to pull pages from the aging bins...
+ * see vm_page.h for an explanation of how
+ * this mechanism works
+ */
+ boolean_t can_steal = FALSE;
+ int num_scanned_queues;
+ static int delay_speculative_age = 0; /* depends the # of times we go through the main pageout_scan loop.*/
+ mach_timespec_t ts;
+ struct vm_speculative_age_q *aq;
+ struct vm_speculative_age_q *sq;
+
+ sq = &vm_page_queue_speculative[VM_PAGE_SPECULATIVE_AGED_Q];
+
+ aq = &vm_page_queue_speculative[speculative_steal_index];
+
+ num_scanned_queues = 0;
+ while (vm_page_queue_empty(&aq->age_q) &&
+ num_scanned_queues++ != VM_PAGE_MAX_SPECULATIVE_AGE_Q) {
+ speculative_steal_index++;
+
+ if (speculative_steal_index > VM_PAGE_MAX_SPECULATIVE_AGE_Q) {
+ speculative_steal_index = VM_PAGE_MIN_SPECULATIVE_AGE_Q;
+ }
+
+ aq = &vm_page_queue_speculative[speculative_steal_index];
+ }
+
+ if (num_scanned_queues == VM_PAGE_MAX_SPECULATIVE_AGE_Q + 1) {
+ /*
+ * XXX We've scanned all the speculative
+ * queues but still haven't found one
+ * that is not empty, even though
+ * vm_page_speculative_count is not 0.
+ */
+ if (!vm_page_queue_empty(&sq->age_q)) {
+ return VM_PAGEOUT_SCAN_NEXT_ITERATION;
+ }
+#if DEVELOPMENT || DEBUG
+ panic("vm_pageout_scan: vm_page_speculative_count=%d but queues are empty", vm_page_speculative_count);
+#endif
+ /* readjust... */
+ vm_page_speculative_count = 0;
+ /* ... and continue */
+ return VM_PAGEOUT_SCAN_NEXT_ITERATION;
+ }
+
+ if (vm_page_speculative_count > vm_pageout_state.vm_page_speculative_target || force_speculative_aging == TRUE) {
+ can_steal = TRUE;
+ } else {
+ if (!delay_speculative_age) {
+ mach_timespec_t ts_fully_aged;
+
+ ts_fully_aged.tv_sec = (VM_PAGE_MAX_SPECULATIVE_AGE_Q * vm_pageout_state.vm_page_speculative_q_age_ms) / 1000;
+ ts_fully_aged.tv_nsec = ((VM_PAGE_MAX_SPECULATIVE_AGE_Q * vm_pageout_state.vm_page_speculative_q_age_ms) % 1000)
+ * 1000 * NSEC_PER_USEC;
+
+ ADD_MACH_TIMESPEC(&ts_fully_aged, &aq->age_ts);
+
+ clock_sec_t sec;
+ clock_nsec_t nsec;
+ clock_get_system_nanotime(&sec, &nsec);
+ ts.tv_sec = (unsigned int) sec;
+ ts.tv_nsec = nsec;
+
+ if (CMP_MACH_TIMESPEC(&ts, &ts_fully_aged) >= 0) {
+ can_steal = TRUE;
+ } else {
+ delay_speculative_age++;
+ }
+ } else {
+ delay_speculative_age++;
+ if (delay_speculative_age == DELAY_SPECULATIVE_AGE) {
+ delay_speculative_age = 0;
+ }
+ }
+ }
+ if (can_steal == TRUE) {
+ vm_page_speculate_ageit(aq);
+ }
+
+ return VM_PAGEOUT_SCAN_PROCEED;
+}
+
+/*
+ * This function is called only from vm_pageout_scan and
+ * it evicts a single VM object from the cache.
+ */
+static int inline
+vps_object_cache_evict(vm_object_t *object_to_unlock)
+{
+ static int cache_evict_throttle = 0;
+ struct vm_speculative_age_q *sq;
+
+ sq = &vm_page_queue_speculative[VM_PAGE_SPECULATIVE_AGED_Q];
+
+ if (vm_page_queue_empty(&sq->age_q) && cache_evict_throttle == 0) {
+ int pages_evicted;
+
+ if (*object_to_unlock != NULL) {
+ vm_object_unlock(*object_to_unlock);
+ *object_to_unlock = NULL;
+ }
+ KERNEL_DEBUG_CONSTANT(0x13001ec | DBG_FUNC_START, 0, 0, 0, 0, 0);
+
+ pages_evicted = vm_object_cache_evict(100, 10);
+
+ KERNEL_DEBUG_CONSTANT(0x13001ec | DBG_FUNC_END, pages_evicted, 0, 0, 0, 0);
+
+ if (pages_evicted) {
+ vm_pageout_vminfo.vm_pageout_pages_evicted += pages_evicted;
+
+ VM_DEBUG_EVENT(vm_pageout_cache_evict, VM_PAGEOUT_CACHE_EVICT, DBG_FUNC_NONE,
+ vm_page_free_count, pages_evicted, vm_pageout_vminfo.vm_pageout_pages_evicted, 0);
+ memoryshot(VM_PAGEOUT_CACHE_EVICT, DBG_FUNC_NONE);
+
+ /*
+ * we just freed up to 100 pages,
+ * so go back to the top of the main loop
+ * and re-evaulate the memory situation
+ */
+ return VM_PAGEOUT_SCAN_NEXT_ITERATION;
+ } else {
+ cache_evict_throttle = 1000;
+ }
+ }
+ if (cache_evict_throttle) {
+ cache_evict_throttle--;
+ }
+
+ return VM_PAGEOUT_SCAN_PROCEED;
+}
+
+
+/*
+ * This function is called only from vm_pageout_scan and
+ * it calculates the filecache min. that needs to be maintained
+ * as we start to steal pages.
+ */
+static void
+vps_calculate_filecache_min(void)
+{
+ int divisor = vm_pageout_state.vm_page_filecache_min_divisor;
+
+#if CONFIG_JETSAM
+ /*
+ * don't let the filecache_min fall below 15% of available memory
+ * on systems with an active compressor that isn't nearing its
+ * limits w/r to accepting new data
+ *
+ * on systems w/o the compressor/swapper, the filecache is always
+ * a very large percentage of the AVAILABLE_NON_COMPRESSED_MEMORY
+ * since most (if not all) of the anonymous pages are in the
+ * throttled queue (which isn't counted as available) which
+ * effectively disables this filter
+ */
+ if (vm_compressor_low_on_space() || divisor == 0) {
+ vm_pageout_state.vm_page_filecache_min = 0;
+ } else {
+ vm_pageout_state.vm_page_filecache_min =
+ ((AVAILABLE_NON_COMPRESSED_MEMORY) * 10) / divisor;
+ }
+#else
+ if (vm_compressor_out_of_space() || divisor == 0) {
+ vm_pageout_state.vm_page_filecache_min = 0;
+ } else {
+ /*
+ * don't let the filecache_min fall below the specified critical level
+ */
+ vm_pageout_state.vm_page_filecache_min =
+ ((AVAILABLE_NON_COMPRESSED_MEMORY) * 10) / divisor;
+ }
+#endif
+ if (vm_page_free_count < (vm_page_free_reserved / 4)) {
+ vm_pageout_state.vm_page_filecache_min = 0;
+ }
+}
+
+/*
+ * This function is called only from vm_pageout_scan and
+ * it updates the flow control time to detect if VM pageoutscan
+ * isn't making progress.
+ */
+static void
+vps_flow_control_reset_deadlock_timer(struct flow_control *flow_control)
+{
+ mach_timespec_t ts;
+ clock_sec_t sec;
+ clock_nsec_t nsec;
+
+ ts.tv_sec = vm_pageout_state.vm_pageout_deadlock_wait / 1000;
+ ts.tv_nsec = (vm_pageout_state.vm_pageout_deadlock_wait % 1000) * 1000 * NSEC_PER_USEC;
+ clock_get_system_nanotime(&sec, &nsec);
+ flow_control->ts.tv_sec = (unsigned int) sec;
+ flow_control->ts.tv_nsec = nsec;
+ ADD_MACH_TIMESPEC(&flow_control->ts, &ts);
+
+ flow_control->state = FCS_DELAYED;
+
+ vm_pageout_vminfo.vm_pageout_scan_inactive_throttled_internal++;
+}
+
+/*
+ * This function is called only from vm_pageout_scan and
+ * it is the flow control logic of VM pageout scan which
+ * controls if it should block and for how long.
+ * Any blocking of vm_pageout_scan happens ONLY in this function.
+ */
+static int
+vps_flow_control(struct flow_control *flow_control, int *anons_grabbed, vm_object_t *object, int *delayed_unlock,
+ vm_page_t *local_freeq, int *local_freed, int *vm_pageout_deadlock_target, unsigned int inactive_burst_count)
+{
+ boolean_t exceeded_burst_throttle = FALSE;
+ unsigned int msecs = 0;
+ uint32_t inactive_external_count;
+ mach_timespec_t ts;
+ struct vm_pageout_queue *iq;
+ struct vm_pageout_queue *eq;
+ struct vm_speculative_age_q *sq;
+
+ iq = &vm_pageout_queue_internal;
+ eq = &vm_pageout_queue_external;
+ sq = &vm_page_queue_speculative[VM_PAGE_SPECULATIVE_AGED_Q];
+
+ /*
+ * Sometimes we have to pause:
+ * 1) No inactive pages - nothing to do.
+ * 2) Loop control - no acceptable pages found on the inactive queue
+ * within the last vm_pageout_burst_inactive_throttle iterations
+ * 3) Flow control - default pageout queue is full
+ */
+ if (vm_page_queue_empty(&vm_page_queue_inactive) &&
+ vm_page_queue_empty(&vm_page_queue_anonymous) &&
+ vm_page_queue_empty(&vm_page_queue_cleaned) &&
+ vm_page_queue_empty(&sq->age_q)) {
+ VM_PAGEOUT_DEBUG(vm_pageout_scan_empty_throttle, 1);
+ msecs = vm_pageout_state.vm_pageout_empty_wait;
+ } else if (inactive_burst_count >=
+ MIN(vm_pageout_state.vm_pageout_burst_inactive_throttle,
+ (vm_page_inactive_count +
+ vm_page_speculative_count))) {
+ VM_PAGEOUT_DEBUG(vm_pageout_scan_burst_throttle, 1);
+ msecs = vm_pageout_state.vm_pageout_burst_wait;
+
+ exceeded_burst_throttle = TRUE;
+ } else if (VM_PAGE_Q_THROTTLED(iq) &&
+ VM_DYNAMIC_PAGING_ENABLED()) {
+ clock_sec_t sec;
+ clock_nsec_t nsec;
+
+ switch (flow_control->state) {
+ case FCS_IDLE:
+ if ((vm_page_free_count + *local_freed) < vm_page_free_target &&
+ vm_pageout_state.vm_restricted_to_single_processor == FALSE) {
+ /*
+ * since the compressor is running independently of vm_pageout_scan
+ * let's not wait for it just yet... as long as we have a healthy supply
+ * of filecache pages to work with, let's keep stealing those.
+ */
+ inactive_external_count = vm_page_inactive_count - vm_page_anonymous_count;
+
+ if (vm_page_pageable_external_count > vm_pageout_state.vm_page_filecache_min &&
+ (inactive_external_count >= VM_PAGE_INACTIVE_TARGET(vm_page_pageable_external_count))) {
+ *anons_grabbed = ANONS_GRABBED_LIMIT;
+ VM_PAGEOUT_DEBUG(vm_pageout_scan_throttle_deferred, 1);
+ return VM_PAGEOUT_SCAN_PROCEED;
+ }
+ }
+
+ vps_flow_control_reset_deadlock_timer(flow_control);
+ msecs = vm_pageout_state.vm_pageout_deadlock_wait;
+
+ break;
+
+ case FCS_DELAYED:
+ clock_get_system_nanotime(&sec, &nsec);
+ ts.tv_sec = (unsigned int) sec;
+ ts.tv_nsec = nsec;
+
+ if (CMP_MACH_TIMESPEC(&ts, &flow_control->ts) >= 0) {
+ /*
+ * the pageout thread for the default pager is potentially
+ * deadlocked since the
+ * default pager queue has been throttled for more than the
+ * allowable time... we need to move some clean pages or dirty
+ * pages belonging to the external pagers if they aren't throttled
+ * vm_page_free_wanted represents the number of threads currently
+ * blocked waiting for pages... we'll move one page for each of
+ * these plus a fixed amount to break the logjam... once we're done
+ * moving this number of pages, we'll re-enter the FSC_DELAYED state
+ * with a new timeout target since we have no way of knowing
+ * whether we've broken the deadlock except through observation
+ * of the queue associated with the default pager... we need to
+ * stop moving pages and allow the system to run to see what
+ * state it settles into.
+ */
+
+ *vm_pageout_deadlock_target = vm_pageout_state.vm_pageout_deadlock_relief +
+ vm_page_free_wanted + vm_page_free_wanted_privileged;
+ VM_PAGEOUT_DEBUG(vm_pageout_scan_deadlock_detected, 1);
+ flow_control->state = FCS_DEADLOCK_DETECTED;
+ thread_wakeup((event_t) &vm_pageout_garbage_collect);
+ return VM_PAGEOUT_SCAN_PROCEED;
+ }
+ /*
+ * just resniff instead of trying
+ * to compute a new delay time... we're going to be
+ * awakened immediately upon a laundry completion,
+ * so we won't wait any longer than necessary
+ */
+ msecs = vm_pageout_state.vm_pageout_idle_wait;
+ break;
+
+ case FCS_DEADLOCK_DETECTED:
+ if (*vm_pageout_deadlock_target) {
+ return VM_PAGEOUT_SCAN_PROCEED;
+ }
+
+ vps_flow_control_reset_deadlock_timer(flow_control);
+ msecs = vm_pageout_state.vm_pageout_deadlock_wait;
+
+ break;
+ }
+ } else {
+ /*
+ * No need to pause...
+ */
+ return VM_PAGEOUT_SCAN_PROCEED;
+ }
+
+ vm_pageout_scan_wants_object = VM_OBJECT_NULL;
+
+ vm_pageout_prepare_to_block(object, delayed_unlock, local_freeq, local_freed,
+ VM_PAGEOUT_PB_CONSIDER_WAKING_COMPACTOR_SWAPPER);
+
+ if (vm_page_free_count >= vm_page_free_target) {
+ /*
+ * we're here because
+ * 1) someone else freed up some pages while we had
+ * the queues unlocked above
+ * and we've hit one of the 3 conditions that
+ * cause us to pause the pageout scan thread
+ *
+ * since we already have enough free pages,
+ * let's avoid stalling and return normally
+ *
+ * before we return, make sure the pageout I/O threads
+ * are running throttled in case there are still requests
+ * in the laundry... since we have enough free pages
+ * we don't need the laundry to be cleaned in a timely
+ * fashion... so let's avoid interfering with foreground
+ * activity
+ *
+ * we don't want to hold vm_page_queue_free_lock when
+ * calling vm_pageout_adjust_eq_iothrottle (since it
+ * may cause other locks to be taken), we do the intitial
+ * check outside of the lock. Once we take the lock,
+ * we recheck the condition since it may have changed.
+ * if it has, no problem, we will make the threads
+ * non-throttled before actually blocking
+ */
+ vm_pageout_adjust_eq_iothrottle(eq, TRUE);
+ }
+ lck_mtx_lock(&vm_page_queue_free_lock);
+
+ if (vm_page_free_count >= vm_page_free_target &&
+ (vm_page_free_wanted == 0) && (vm_page_free_wanted_privileged == 0)) {
+ return VM_PAGEOUT_SCAN_DONE_RETURN;
+ }
+ lck_mtx_unlock(&vm_page_queue_free_lock);
+
+ if ((vm_page_free_count + vm_page_cleaned_count) < vm_page_free_target) {
+ /*
+ * we're most likely about to block due to one of
+ * the 3 conditions that cause vm_pageout_scan to
+ * not be able to make forward progress w/r
+ * to providing new pages to the free queue,
+ * so unthrottle the I/O threads in case we
+ * have laundry to be cleaned... it needs
+ * to be completed ASAP.
+ *
+ * even if we don't block, we want the io threads
+ * running unthrottled since the sum of free +
+ * clean pages is still under our free target
+ */
+ vm_pageout_adjust_eq_iothrottle(eq, FALSE);
+ }
+ if (vm_page_cleaned_count > 0 && exceeded_burst_throttle == FALSE) {
+ /*
+ * if we get here we're below our free target and
+ * we're stalling due to a full laundry queue or
+ * we don't have any inactive pages other then
+ * those in the clean queue...
+ * however, we have pages on the clean queue that
+ * can be moved to the free queue, so let's not
+ * stall the pageout scan
+ */
+ flow_control->state = FCS_IDLE;
+ return VM_PAGEOUT_SCAN_PROCEED;
+ }
+ if (flow_control->state == FCS_DELAYED && !VM_PAGE_Q_THROTTLED(iq)) {
+ flow_control->state = FCS_IDLE;
+ return VM_PAGEOUT_SCAN_PROCEED;
+ }
+
+ VM_CHECK_MEMORYSTATUS;
+
+ if (flow_control->state != FCS_IDLE) {
+ VM_PAGEOUT_DEBUG(vm_pageout_scan_throttle, 1);
+ }
+
+ iq->pgo_throttled = TRUE;
+ assert_wait_timeout((event_t) &iq->pgo_laundry, THREAD_INTERRUPTIBLE, msecs, 1000 * NSEC_PER_USEC);
+
+ counter(c_vm_pageout_scan_block++);
+
+ vm_page_unlock_queues();
+
+ assert(vm_pageout_scan_wants_object == VM_OBJECT_NULL);
+
+ VM_DEBUG_EVENT(vm_pageout_thread_block, VM_PAGEOUT_THREAD_BLOCK, DBG_FUNC_START,
+ iq->pgo_laundry, iq->pgo_maxlaundry, msecs, 0);
+ memoryshot(VM_PAGEOUT_THREAD_BLOCK, DBG_FUNC_START);
+
+ thread_block(THREAD_CONTINUE_NULL);
+
+ VM_DEBUG_EVENT(vm_pageout_thread_block, VM_PAGEOUT_THREAD_BLOCK, DBG_FUNC_END,
+ iq->pgo_laundry, iq->pgo_maxlaundry, msecs, 0);
+ memoryshot(VM_PAGEOUT_THREAD_BLOCK, DBG_FUNC_END);
+
+ vm_page_lock_queues();
+
+ iq->pgo_throttled = FALSE;
+
+ vps_init_page_targets();
+
+ return VM_PAGEOUT_SCAN_NEXT_ITERATION;
+}
+
+/*
+ * This function is called only from vm_pageout_scan and
+ * it will find and return the most appropriate page to be
+ * reclaimed.
+ */
+static int
+vps_choose_victim_page(vm_page_t *victim_page, int *anons_grabbed, boolean_t *grab_anonymous, boolean_t force_anonymous,
+ boolean_t *is_page_from_bg_q, unsigned int *reactivated_this_call)
+{
+ vm_page_t m = NULL;
+ vm_object_t m_object = VM_OBJECT_NULL;
+ uint32_t inactive_external_count;
+ struct vm_speculative_age_q *sq;
+ struct vm_pageout_queue *iq;
+ int retval = VM_PAGEOUT_SCAN_PROCEED;
+
+ sq = &vm_page_queue_speculative[VM_PAGE_SPECULATIVE_AGED_Q];
+ iq = &vm_pageout_queue_internal;
+
+ *is_page_from_bg_q = FALSE;
+
+ m = NULL;
+ m_object = VM_OBJECT_NULL;
+
+ if (VM_DYNAMIC_PAGING_ENABLED()) {
+ assert(vm_page_throttled_count == 0);
+ assert(vm_page_queue_empty(&vm_page_queue_throttled));
+ }
+
+ /*
+ * Try for a clean-queue inactive page.
+ * These are pages that vm_pageout_scan tried to steal earlier, but
+ * were dirty and had to be cleaned. Pick them up now that they are clean.
+ */
+ if (!vm_page_queue_empty(&vm_page_queue_cleaned)) {
+ m = (vm_page_t) vm_page_queue_first(&vm_page_queue_cleaned);
+
+ assert(m->vmp_q_state == VM_PAGE_ON_INACTIVE_CLEANED_Q);
+
+ goto found_page;
+ }
+
+ /*
+ * The next most eligible pages are ones we paged in speculatively,
+ * but which have not yet been touched and have been aged out.
+ */
+ if (!vm_page_queue_empty(&sq->age_q)) {
+ m = (vm_page_t) vm_page_queue_first(&sq->age_q);
+
+ assert(m->vmp_q_state == VM_PAGE_ON_SPECULATIVE_Q);
+
+ if (!m->vmp_dirty || force_anonymous == FALSE) {
+ goto found_page;
+ } else {
+ m = NULL;
+ }
+ }
+
+#if CONFIG_BACKGROUND_QUEUE
+ if (vm_page_background_mode != VM_PAGE_BG_DISABLED && (vm_page_background_count > vm_page_background_target)) {
+ vm_object_t bg_m_object = NULL;
+
+ m = (vm_page_t) vm_page_queue_first(&vm_page_queue_background);
+
+ bg_m_object = VM_PAGE_OBJECT(m);
+
+ if (!VM_PAGE_PAGEABLE(m)) {
+ /*
+ * This page is on the background queue
+ * but not on a pageable queue. This is
+ * likely a transient state and whoever
+ * took it out of its pageable queue
+ * will likely put it back on a pageable
+ * queue soon but we can't deal with it
+ * at this point, so let's ignore this
+ * page.
+ */
+ } else if (force_anonymous == FALSE || bg_m_object->internal) {
+ if (bg_m_object->internal &&
+ (VM_PAGE_Q_THROTTLED(iq) ||
+ vm_compressor_out_of_space() == TRUE ||
+ vm_page_free_count < (vm_page_free_reserved / 4))) {
+ vm_pageout_skipped_bq_internal++;
+ } else {
+ *is_page_from_bg_q = TRUE;
+
+ if (bg_m_object->internal) {
+ vm_pageout_vminfo.vm_pageout_considered_bq_internal++;
+ } else {
+ vm_pageout_vminfo.vm_pageout_considered_bq_external++;
+ }
+ goto found_page;
+ }
+ }
+ }
+#endif /* CONFIG_BACKGROUND_QUEUE */
+
+ inactive_external_count = vm_page_inactive_count - vm_page_anonymous_count;
+
+ if ((vm_page_pageable_external_count < vm_pageout_state.vm_page_filecache_min || force_anonymous == TRUE) ||
+ (inactive_external_count < VM_PAGE_INACTIVE_TARGET(vm_page_pageable_external_count))) {
+ *grab_anonymous = TRUE;
+ *anons_grabbed = 0;
+
+ vm_pageout_vminfo.vm_pageout_skipped_external++;
+ goto want_anonymous;
+ }
+ *grab_anonymous = (vm_page_anonymous_count > vm_page_anonymous_min);
+
+#if CONFIG_JETSAM
+ /* If the file-backed pool has accumulated
+ * significantly more pages than the jetsam
+ * threshold, prefer to reclaim those
+ * inline to minimise compute overhead of reclaiming
+ * anonymous pages.
+ * This calculation does not account for the CPU local
+ * external page queues, as those are expected to be
+ * much smaller relative to the global pools.
+ */
+
+ struct vm_pageout_queue *eq = &vm_pageout_queue_external;
+
+ if (*grab_anonymous == TRUE && !VM_PAGE_Q_THROTTLED(eq)) {
+ if (vm_page_pageable_external_count >
+ vm_pageout_state.vm_page_filecache_min) {
+ if ((vm_page_pageable_external_count *
+ vm_pageout_memorystatus_fb_factor_dr) >
+ (memorystatus_available_pages_critical *
+ vm_pageout_memorystatus_fb_factor_nr)) {
+ *grab_anonymous = FALSE;
+
+ VM_PAGEOUT_DEBUG(vm_grab_anon_overrides, 1);
+ }
+ }
+ if (*grab_anonymous) {
+ VM_PAGEOUT_DEBUG(vm_grab_anon_nops, 1);
+ }
+ }
+#endif /* CONFIG_JETSAM */
+
+want_anonymous:
+ if (*grab_anonymous == FALSE || *anons_grabbed >= ANONS_GRABBED_LIMIT || vm_page_queue_empty(&vm_page_queue_anonymous)) {
+ if (!vm_page_queue_empty(&vm_page_queue_inactive)) {
+ m = (vm_page_t) vm_page_queue_first(&vm_page_queue_inactive);
+
+ assert(m->vmp_q_state == VM_PAGE_ON_INACTIVE_EXTERNAL_Q);
+ *anons_grabbed = 0;
+
+ if (vm_page_pageable_external_count < vm_pageout_state.vm_page_filecache_min) {
+ if (!vm_page_queue_empty(&vm_page_queue_anonymous)) {
+ if ((++(*reactivated_this_call) % 100)) {
+ vm_pageout_vminfo.vm_pageout_filecache_min_reactivated++;
+
+ vm_page_activate(m);
+ VM_STAT_INCR(reactivations);
+#if CONFIG_BACKGROUND_QUEUE
+#if DEVELOPMENT || DEBUG
+ if (*is_page_from_bg_q == TRUE) {
+ if (m_object->internal) {
+ vm_pageout_rejected_bq_internal++;
+ } else {
+ vm_pageout_rejected_bq_external++;
+ }
+ }
+#endif /* DEVELOPMENT || DEBUG */
+#endif /* CONFIG_BACKGROUND_QUEUE */
+ vm_pageout_state.vm_pageout_inactive_used++;
+
+ m = NULL;
+ retval = VM_PAGEOUT_SCAN_NEXT_ITERATION;
+
+ goto found_page;
+ }
+
+ /*
+ * steal 1 of the file backed pages even if
+ * we are under the limit that has been set
+ * for a healthy filecache
+ */
+ }
+ }
+ goto found_page;
+ }
+ }
+ if (!vm_page_queue_empty(&vm_page_queue_anonymous)) {
+ m = (vm_page_t) vm_page_queue_first(&vm_page_queue_anonymous);
+
+ assert(m->vmp_q_state == VM_PAGE_ON_INACTIVE_INTERNAL_Q);
+ *anons_grabbed += 1;
+
+ goto found_page;
+ }
+
+ m = NULL;
+
+found_page:
+ *victim_page = m;
+
+ return retval;
+}
+
+/*
+ * This function is called only from vm_pageout_scan and
+ * it will put a page back on the active/inactive queue
+ * if we can't reclaim it for some reason.
+ */
+static void
+vps_requeue_page(vm_page_t m, int page_prev_q_state, __unused boolean_t page_from_bg_q)
+{
+ if (page_prev_q_state == VM_PAGE_ON_SPECULATIVE_Q) {
+ vm_page_enqueue_inactive(m, FALSE);
+ } else {
+ vm_page_activate(m);
+ }
+
+#if CONFIG_BACKGROUND_QUEUE
+#if DEVELOPMENT || DEBUG
+ vm_object_t m_object = VM_PAGE_OBJECT(m);
+
+ if (page_from_bg_q == TRUE) {
+ if (m_object->internal) {
+ vm_pageout_rejected_bq_internal++;
+ } else {
+ vm_pageout_rejected_bq_external++;
+ }
+ }
+#endif /* DEVELOPMENT || DEBUG */
+#endif /* CONFIG_BACKGROUND_QUEUE */
+}
+
+/*
+ * This function is called only from vm_pageout_scan and
+ * it will try to grab the victim page's VM object (m_object)
+ * which differs from the previous victim page's object (object).
+ */
+static int
+vps_switch_object(vm_page_t m, vm_object_t m_object, vm_object_t *object, int page_prev_q_state, boolean_t avoid_anon_pages, boolean_t page_from_bg_q)
+{
+ struct vm_speculative_age_q *sq;
+
+ sq = &vm_page_queue_speculative[VM_PAGE_SPECULATIVE_AGED_Q];
+
+ /*
+ * the object associated with candidate page is
+ * different from the one we were just working
+ * with... dump the lock if we still own it
+ */
+ if (*object != NULL) {
+ vm_object_unlock(*object);
+ *object = NULL;
+ }
+ /*
+ * Try to lock object; since we've alread got the
+ * page queues lock, we can only 'try' for this one.
+ * if the 'try' fails, we need to do a mutex_pause
+ * to allow the owner of the object lock a chance to
+ * run... otherwise, we're likely to trip over this
+ * object in the same state as we work our way through
+ * the queue... clumps of pages associated with the same
+ * object are fairly typical on the inactive and active queues
+ */
+ if (!vm_object_lock_try_scan(m_object)) {
+ vm_page_t m_want = NULL;
+
+ vm_pageout_vminfo.vm_pageout_inactive_nolock++;
+
+ if (page_prev_q_state == VM_PAGE_ON_INACTIVE_CLEANED_Q) {
+ VM_PAGEOUT_DEBUG(vm_pageout_cleaned_nolock, 1);
+ }
+
+ pmap_clear_reference(VM_PAGE_GET_PHYS_PAGE(m));
+
+ m->vmp_reference = FALSE;
+
+ if (!m_object->object_is_shared_cache) {
+ /*
+ * don't apply this optimization if this is the shared cache
+ * object, it's too easy to get rid of very hot and important
+ * pages...
+ * m->vmp_object must be stable since we hold the page queues lock...
+ * we can update the scan_collisions field sans the object lock
+ * since it is a separate field and this is the only spot that does
+ * a read-modify-write operation and it is never executed concurrently...
+ * we can asynchronously set this field to 0 when creating a UPL, so it
+ * is possible for the value to be a bit non-determistic, but that's ok
+ * since it's only used as a hint
+ */
+ m_object->scan_collisions = 1;
+ }
+ if (!vm_page_queue_empty(&vm_page_queue_cleaned)) {
+ m_want = (vm_page_t) vm_page_queue_first(&vm_page_queue_cleaned);
+ } else if (!vm_page_queue_empty(&sq->age_q)) {
+ m_want = (vm_page_t) vm_page_queue_first(&sq->age_q);
+ } else if ((avoid_anon_pages || vm_page_queue_empty(&vm_page_queue_anonymous)) &&
+ !vm_page_queue_empty(&vm_page_queue_inactive)) {
+ m_want = (vm_page_t) vm_page_queue_first(&vm_page_queue_inactive);
+ } else if (!vm_page_queue_empty(&vm_page_queue_anonymous)) {
+ m_want = (vm_page_t) vm_page_queue_first(&vm_page_queue_anonymous);
+ }
+
+ /*
+ * this is the next object we're going to be interested in
+ * try to make sure its available after the mutex_pause
+ * returns control
+ */
+ if (m_want) {
+ vm_pageout_scan_wants_object = VM_PAGE_OBJECT(m_want);
+ }
+
+ vps_requeue_page(m, page_prev_q_state, page_from_bg_q);
+
+ return VM_PAGEOUT_SCAN_NEXT_ITERATION;
+ } else {
+ *object = m_object;
+ vm_pageout_scan_wants_object = VM_OBJECT_NULL;
+ }
+
+ return VM_PAGEOUT_SCAN_PROCEED;
+}
+
+/*
+ * This function is called only from vm_pageout_scan and
+ * it notices that pageout scan may be rendered ineffective
+ * due to a FS deadlock and will jetsam a process if possible.
+ * If jetsam isn't supported, it'll move the page to the active
+ * queue to try and get some different pages pushed onwards so
+ * we can try to get out of this scenario.
+ */
+static void
+vps_deal_with_throttled_queues(vm_page_t m, vm_object_t *object, uint32_t *vm_pageout_inactive_external_forced_reactivate_limit,
+ int *delayed_unlock, boolean_t *force_anonymous, __unused boolean_t is_page_from_bg_q)
+{
+ struct vm_pageout_queue *eq;
+ vm_object_t cur_object = VM_OBJECT_NULL;
+
+ cur_object = *object;
+
+ eq = &vm_pageout_queue_external;
+
+ if (cur_object->internal == FALSE) {
+ /*
+ * we need to break up the following potential deadlock case...
+ * a) The external pageout thread is stuck on the truncate lock for a file that is being extended i.e. written.
+ * b) The thread doing the writing is waiting for pages while holding the truncate lock
+ * c) Most of the pages in the inactive queue belong to this file.
+ *
+ * we are potentially in this deadlock because...
+ * a) the external pageout queue is throttled
+ * b) we're done with the active queue and moved on to the inactive queue
+ * c) we've got a dirty external page
+ *
+ * since we don't know the reason for the external pageout queue being throttled we
+ * must suspect that we are deadlocked, so move the current page onto the active queue
+ * in an effort to cause a page from the active queue to 'age' to the inactive queue
+ *
+ * if we don't have jetsam configured (i.e. we have a dynamic pager), set
+ * 'force_anonymous' to TRUE to cause us to grab a page from the cleaned/anonymous
+ * pool the next time we select a victim page... if we can make enough new free pages,
+ * the deadlock will break, the external pageout queue will empty and it will no longer
+ * be throttled
+ *
+ * if we have jetsam configured, keep a count of the pages reactivated this way so
+ * that we can try to find clean pages in the active/inactive queues before
+ * deciding to jetsam a process
+ */
+ vm_pageout_vminfo.vm_pageout_scan_inactive_throttled_external++;
+
+ vm_page_check_pageable_safe(m);
+ assert(m->vmp_q_state == VM_PAGE_NOT_ON_Q);
+ vm_page_queue_enter(&vm_page_queue_active, m, vmp_pageq);
+ m->vmp_q_state = VM_PAGE_ON_ACTIVE_Q;
+ vm_page_active_count++;
+ vm_page_pageable_external_count++;
+
+ vm_pageout_adjust_eq_iothrottle(eq, FALSE);
+
+#if CONFIG_MEMORYSTATUS && CONFIG_JETSAM
+
+#pragma unused(force_anonymous)
+
+ *vm_pageout_inactive_external_forced_reactivate_limit -= 1;
+
+ if (*vm_pageout_inactive_external_forced_reactivate_limit <= 0) {
+ *vm_pageout_inactive_external_forced_reactivate_limit = vm_page_active_count + vm_page_inactive_count;
+ /*
+ * Possible deadlock scenario so request jetsam action
+ */
+
+ assert(cur_object);
+ vm_object_unlock(cur_object);
+
+ cur_object = VM_OBJECT_NULL;
+
+ /*
+ * VM pageout scan needs to know we have dropped this lock and so set the
+ * object variable we got passed in to NULL.
+ */
+ *object = VM_OBJECT_NULL;
+
+ vm_page_unlock_queues();
+
+ VM_DEBUG_CONSTANT_EVENT(vm_pageout_jetsam, VM_PAGEOUT_JETSAM, DBG_FUNC_START,
+ vm_page_active_count, vm_page_inactive_count, vm_page_free_count, vm_page_free_count);
+
+ /* Kill first suitable process. If this call returned FALSE, we might have simply purged a process instead. */
+ if (memorystatus_kill_on_VM_page_shortage(FALSE) == TRUE) {
+ VM_PAGEOUT_DEBUG(vm_pageout_inactive_external_forced_jetsam_count, 1);
+ }
+
+ VM_DEBUG_CONSTANT_EVENT(vm_pageout_jetsam, VM_PAGEOUT_JETSAM, DBG_FUNC_END,
+ vm_page_active_count, vm_page_inactive_count, vm_page_free_count, vm_page_free_count);
+
+ vm_page_lock_queues();
+ *delayed_unlock = 1;
+ }
+#else /* CONFIG_MEMORYSTATUS && CONFIG_JETSAM */
+
+#pragma unused(vm_pageout_inactive_external_forced_reactivate_limit)
+#pragma unused(delayed_unlock)
+
+ *force_anonymous = TRUE;
+#endif /* CONFIG_MEMORYSTATUS && CONFIG_JETSAM */
+ } else {
+ vm_page_activate(m);
+ VM_STAT_INCR(reactivations);
+
+#if CONFIG_BACKGROUND_QUEUE
+#if DEVELOPMENT || DEBUG
+ if (is_page_from_bg_q == TRUE) {
+ if (cur_object->internal) {
+ vm_pageout_rejected_bq_internal++;
+ } else {
+ vm_pageout_rejected_bq_external++;
+ }
+ }
+#endif /* DEVELOPMENT || DEBUG */
+#endif /* CONFIG_BACKGROUND_QUEUE */
+
+ vm_pageout_state.vm_pageout_inactive_used++;
+ }
+}
+
+
+void
+vm_page_balance_inactive(int max_to_move)
+{
+ vm_page_t m;
+
+ LCK_MTX_ASSERT(&vm_page_queue_lock, LCK_MTX_ASSERT_OWNED);
+
+ if (hibernation_vmqueues_inspection || hibernate_cleaning_in_progress) {
+ /*
+ * It is likely that the hibernation code path is
+ * dealing with these very queues as we are about
+ * to move pages around in/from them and completely
+ * change the linkage of the pages.
+ *
+ * And so we skip the rebalancing of these queues.
+ */
+ return;
+ }
+ vm_page_inactive_target = VM_PAGE_INACTIVE_TARGET(vm_page_active_count +
+ vm_page_inactive_count +
+ vm_page_speculative_count);
+
+ while (max_to_move-- && (vm_page_inactive_count + vm_page_speculative_count) < vm_page_inactive_target) {
+ VM_PAGEOUT_DEBUG(vm_pageout_balanced, 1);
+
+ m = (vm_page_t) vm_page_queue_first(&vm_page_queue_active);
+
+ assert(m->vmp_q_state == VM_PAGE_ON_ACTIVE_Q);
+ assert(!m->vmp_laundry);
+ assert(VM_PAGE_OBJECT(m) != kernel_object);
+ assert(VM_PAGE_GET_PHYS_PAGE(m) != vm_page_guard_addr);
+
+ DTRACE_VM2(scan, int, 1, (uint64_t *), NULL);
+
+ /*
+ * by not passing in a pmap_flush_context we will forgo any TLB flushing, local or otherwise...
+ *
+ * a TLB flush isn't really needed here since at worst we'll miss the reference bit being
+ * updated in the PTE if a remote processor still has this mapping cached in its TLB when the
+ * new reference happens. If no futher references happen on the page after that remote TLB flushes
+ * we'll see a clean, non-referenced page when it eventually gets pulled out of the inactive queue
+ * by pageout_scan, which is just fine since the last reference would have happened quite far
+ * in the past (TLB caches don't hang around for very long), and of course could just as easily
+ * have happened before we moved the page
+ */
+ if (m->vmp_pmapped == TRUE) {
+ pmap_clear_refmod_options(VM_PAGE_GET_PHYS_PAGE(m), VM_MEM_REFERENCED, PMAP_OPTIONS_NOFLUSH, (void *)NULL);
+ }
+
+ /*
+ * The page might be absent or busy,
+ * but vm_page_deactivate can handle that.
+ * FALSE indicates that we don't want a H/W clear reference
+ */
+ vm_page_deactivate_internal(m, FALSE);
+ }
+}
+
+
+/*
+ * vm_pageout_scan does the dirty work for the pageout daemon.
+ * It returns with both vm_page_queue_free_lock and vm_page_queue_lock
+ * held and vm_page_free_wanted == 0.
+ */
+void
+vm_pageout_scan(void)
+{
+ unsigned int loop_count = 0;
+ unsigned int inactive_burst_count = 0;
+ unsigned int reactivated_this_call;
+ unsigned int reactivate_limit;
+ vm_page_t local_freeq = NULL;
+ int local_freed = 0;
+ int delayed_unlock;
+ int delayed_unlock_limit = 0;
+ int refmod_state = 0;
+ int vm_pageout_deadlock_target = 0;
+ struct vm_pageout_queue *iq;
+ struct vm_pageout_queue *eq;
+ struct vm_speculative_age_q *sq;
+ struct flow_control flow_control = { .state = 0, .ts = { .tv_sec = 0, .tv_nsec = 0 } };
+ boolean_t inactive_throttled = FALSE;
+ vm_object_t object = NULL;
+ uint32_t inactive_reclaim_run;
+ boolean_t grab_anonymous = FALSE;
+ boolean_t force_anonymous = FALSE;
+ boolean_t force_speculative_aging = FALSE;
+ int anons_grabbed = 0;
+ int page_prev_q_state = 0;
+ boolean_t page_from_bg_q = FALSE;
+ uint32_t vm_pageout_inactive_external_forced_reactivate_limit = 0;
+ vm_object_t m_object = VM_OBJECT_NULL;
+ int retval = 0;
+ boolean_t lock_yield_check = FALSE;
+
+
+ VM_DEBUG_CONSTANT_EVENT(vm_pageout_scan, VM_PAGEOUT_SCAN, DBG_FUNC_START,
+ vm_pageout_vminfo.vm_pageout_freed_speculative,
+ vm_pageout_state.vm_pageout_inactive_clean,
+ vm_pageout_vminfo.vm_pageout_inactive_dirty_internal,
+ vm_pageout_vminfo.vm_pageout_inactive_dirty_external);
- /*
- * Move pages from active to inactive if we're below the target
- */
- /* if we are trying to make clean, we need to make sure we actually have inactive - mj */
- if ((vm_page_inactive_count + vm_page_speculative_count) >= vm_page_inactive_target)
- goto done_moving_active_pages;
+ flow_control.state = FCS_IDLE;
+ iq = &vm_pageout_queue_internal;
+ eq = &vm_pageout_queue_external;
+ sq = &vm_page_queue_speculative[VM_PAGE_SPECULATIVE_AGED_Q];
- if (object != NULL) {
- vm_object_unlock(object);
- object = NULL;
- vm_pageout_scan_wants_object = VM_OBJECT_NULL;
- }
- /*
- * Don't sweep through active queue more than the throttle
- * which should be kept relatively low
- */
- active_burst_count = MIN(vm_pageout_burst_active_throttle, vm_page_active_count);
+ /* Ask the pmap layer to return any pages it no longer needs. */
+ uint64_t pmap_wired_pages_freed = pmap_release_pages_fast();
+
+ vm_page_lock_queues();
- VM_DEBUG_EVENT(vm_pageout_balance, VM_PAGEOUT_BALANCE, DBG_FUNC_START,
- vm_pageout_inactive, vm_pageout_inactive_used, vm_page_free_count, local_freed);
+ vm_page_wire_count -= pmap_wired_pages_freed;
- VM_DEBUG_EVENT(vm_pageout_balance, VM_PAGEOUT_BALANCE, DBG_FUNC_NONE,
- vm_pageout_speculative_clean, vm_pageout_inactive_clean,
- vm_pageout_inactive_dirty_internal, vm_pageout_inactive_dirty_external);
- memoryshot(VM_PAGEOUT_BALANCE, DBG_FUNC_START);
+ delayed_unlock = 1;
+ /*
+ * Calculate the max number of referenced pages on the inactive
+ * queue that we will reactivate.
+ */
+ reactivated_this_call = 0;
+ reactivate_limit = VM_PAGE_REACTIVATE_LIMIT(vm_page_active_count +
+ vm_page_inactive_count);
+ inactive_reclaim_run = 0;
- while (!queue_empty(&vm_page_queue_active) && active_burst_count--) {
+ vm_pageout_inactive_external_forced_reactivate_limit = vm_page_active_count + vm_page_inactive_count;
- vm_pageout_active++;
+ /*
+ * We must limit the rate at which we send pages to the pagers
+ * so that we don't tie up too many pages in the I/O queues.
+ * We implement a throttling mechanism using the laundry count
+ * to limit the number of pages outstanding to the default
+ * and external pagers. We can bypass the throttles and look
+ * for clean pages if the pageout queues don't drain in a timely
+ * fashion since this may indicate that the pageout paths are
+ * stalled waiting for memory, which only we can provide.
+ */
- m = (vm_page_t) queue_first(&vm_page_queue_active);
+ vps_init_page_targets();
+ assert(object == NULL);
+ assert(delayed_unlock != 0);
- assert(m->active && !m->inactive);
- assert(!m->laundry);
- assert(m->object != kernel_object);
- assert(m->phys_page != vm_page_guard_addr);
+ for (;;) {
+ vm_page_t m;
- DTRACE_VM2(scan, int, 1, (uint64_t *), NULL);
+ DTRACE_VM2(rev, int, 1, (uint64_t *), NULL);
-#if LATENCY_JETSAM
- if (m->fictitious) {
- const uint32_t FREE_TARGET_MULTIPLIER = 2;
-
- uint64_t now = mach_absolute_time();
- uint64_t delta = now - m->offset;
- clock_sec_t jl_secs = 0;
- clock_usec_t jl_usecs = 0;
- boolean_t issue_jetsam = FALSE;
-
- absolutetime_to_microtime(delta, &jl_secs, &jl_usecs);
- jl_usecs += jl_secs * USEC_PER_SEC;
+ if (lock_yield_check) {
+ lock_yield_check = FALSE;
- /* Jetsam only if the token hasn't aged sufficiently and the free count is close to the target (avoiding spurious triggers) */
- if ((jl_usecs <= JETSAM_AGE_NOTIFY_CRITICAL) && (vm_page_free_count < (FREE_TARGET_MULTIPLIER * vm_page_free_target))) {
- issue_jetsam = TRUE;
- }
-
- VM_DEBUG_EVENT(vm_pageout_page_token, VM_PAGEOUT_PAGE_TOKEN, DBG_FUNC_NONE,
- vm_page_active_count, vm_page_inactive_count, vm_page_free_count, jl_usecs);
-
- m->offset = 0;
- queue_remove(&vm_page_queue_active, m, vm_page_t, pageq);
- queue_enter(&vm_page_queue_active, m, vm_page_t, pageq);
-
- m->offset = now;
- jlp_time = now;
-
- if (issue_jetsam) {
- vm_page_unlock_queues();
+ if (delayed_unlock++ > delayed_unlock_limit) {
+ int freed = local_freed;
- if (local_freeq) {
- vm_page_free_list(local_freeq, TRUE);
- local_freeq = NULL;
- local_freed = 0;
- }
-
- VM_DEBUG_EVENT(vm_pageout_jetsam, VM_PAGEOUT_JETSAM, DBG_FUNC_START,
- vm_page_active_count, vm_page_inactive_count, vm_page_free_count, 0);
-
- assert_wait_timeout(&latency_jetsam_wakeup, THREAD_INTERRUPTIBLE, 10 /* msecs */, 1000*NSEC_PER_USEC);
- /* Kill the top process asynchronously */
- memorystatus_kill_on_VM_page_shortage(TRUE);
- thread_block(THREAD_CONTINUE_NULL);
-
- VM_DEBUG_EVENT(vm_pageout_jetsam, VM_PAGEOUT_JETSAM, DBG_FUNC_END, 0, 0, 0, 0);
-
- vm_page_lock_queues();
+ vm_pageout_prepare_to_block(&object, &delayed_unlock, &local_freeq, &local_freed,
+ VM_PAGEOUT_PB_CONSIDER_WAKING_COMPACTOR_SWAPPER);
+ if (freed == 0) {
+ lck_mtx_yield(&vm_page_queue_lock);
}
- } else {
-#endif /* LATENCY_JETSAM */
- /*
- * by not passing in a pmap_flush_context we will forgo any TLB flushing, local or otherwise...
- *
- * a TLB flush isn't really needed here since at worst we'll miss the reference bit being
- * updated in the PTE if a remote processor still has this mapping cached in its TLB when the
- * new reference happens. If no futher references happen on the page after that remote TLB flushes
- * we'll see a clean, non-referenced page when it eventually gets pulled out of the inactive queue
- * by pageout_scan, which is just fine since the last reference would have happened quite far
- * in the past (TLB caches don't hang around for very long), and of course could just as easily
- * have happened before we moved the page
- */
- pmap_clear_refmod_options(m->phys_page, VM_MEM_REFERENCED, PMAP_OPTIONS_NOFLUSH, (void *)NULL);
-
- /*
- * The page might be absent or busy,
- * but vm_page_deactivate can handle that.
- * FALSE indicates that we don't want a H/W clear reference
- */
- vm_page_deactivate_internal(m, FALSE);
+ } else if (vm_pageout_scan_wants_object) {
+ vm_page_unlock_queues();
+ mutex_pause(0);
+ vm_page_lock_queues();
+ }
+ }
- if (delayed_unlock++ > delayed_unlock_limit) {
+ if (vm_upl_wait_for_pages < 0) {
+ vm_upl_wait_for_pages = 0;
+ }
- if (local_freeq) {
- vm_page_unlock_queues();
-
- VM_DEBUG_EVENT(vm_pageout_freelist, VM_PAGEOUT_FREELIST, DBG_FUNC_START,
- vm_page_free_count, local_freed, delayed_unlock_limit, 1);
+ delayed_unlock_limit = VM_PAGEOUT_DELAYED_UNLOCK_LIMIT + vm_upl_wait_for_pages;
- vm_page_free_list(local_freeq, TRUE);
-
- VM_DEBUG_EVENT(vm_pageout_freelist, VM_PAGEOUT_FREELIST, DBG_FUNC_END,
- vm_page_free_count, 0, 0, 1);
+ if (delayed_unlock_limit > VM_PAGEOUT_DELAYED_UNLOCK_LIMIT_MAX) {
+ delayed_unlock_limit = VM_PAGEOUT_DELAYED_UNLOCK_LIMIT_MAX;
+ }
- local_freeq = NULL;
- local_freed = 0;
- vm_page_lock_queues();
- } else
- lck_mtx_yield(&vm_page_queue_lock);
+ vps_deal_with_secluded_page_overflow(&local_freeq, &local_freed);
- delayed_unlock = 1;
+ assert(delayed_unlock);
- /*
- * continue the while loop processing
- * the active queue... need to hold
- * the page queues lock
- */
- }
-#if LATENCY_JETSAM
- }
-#endif /* LATENCY_JETSAM */
- }
+ /*
+ * maintain our balance
+ */
+ vm_page_balance_inactive(1);
- VM_DEBUG_EVENT(vm_pageout_balance, VM_PAGEOUT_BALANCE, DBG_FUNC_END,
- vm_page_active_count, vm_page_inactive_count, vm_page_speculative_count, vm_page_inactive_target);
- memoryshot(VM_PAGEOUT_BALANCE, DBG_FUNC_END);
/**********************************************************************
- * above this point we're playing with the active queue
- * below this point we're playing with the throttling mechanisms
- * and the inactive queue
- **********************************************************************/
-
-done_moving_active_pages:
+ * above this point we're playing with the active and secluded queues
+ * below this point we're playing with the throttling mechanisms
+ * and the inactive queue
+ **********************************************************************/
if (vm_page_free_count + local_freed >= vm_page_free_target) {
- if (object != NULL) {
- vm_object_unlock(object);
- object = NULL;
- }
vm_pageout_scan_wants_object = VM_OBJECT_NULL;
- if (local_freeq) {
- vm_page_unlock_queues();
-
- VM_DEBUG_EVENT(vm_pageout_freelist, VM_PAGEOUT_FREELIST, DBG_FUNC_START,
- vm_page_free_count, local_freed, delayed_unlock_limit, 2);
-
- vm_page_free_list(local_freeq, TRUE);
-
- VM_DEBUG_EVENT(vm_pageout_freelist, VM_PAGEOUT_FREELIST, DBG_FUNC_END,
- vm_page_free_count, local_freed, 0, 2);
-
- local_freeq = NULL;
- local_freed = 0;
- vm_page_lock_queues();
- }
+ vm_pageout_prepare_to_block(&object, &delayed_unlock, &local_freeq, &local_freed,
+ VM_PAGEOUT_PB_CONSIDER_WAKING_COMPACTOR_SWAPPER);
/*
* make sure the pageout I/O threads are running
- * throttled in case there are still requests
+ * throttled in case there are still requests
* in the laundry... since we have met our targets
* we don't need the laundry to be cleaned in a timely
* fashion... so let's avoid interfering with foreground
* activity
*/
- vm_pageout_adjust_io_throttles(iq, eq, TRUE);
+ vm_pageout_adjust_eq_iothrottle(eq, TRUE);
- /*
- * recalculate vm_page_inactivate_target
- */
- vm_page_inactive_target = VM_PAGE_INACTIVE_TARGET(vm_page_active_count +
- vm_page_inactive_count +
- vm_page_speculative_count);
- if (((vm_page_inactive_count + vm_page_speculative_count) < vm_page_inactive_target) &&
- !queue_empty(&vm_page_queue_active)) {
- /*
- * inactive target still not met... keep going
- * until we get the queues balanced...
- */
- continue;
- }
- lck_mtx_lock(&vm_page_queue_free_lock);
+ lck_mtx_lock(&vm_page_queue_free_lock);
if ((vm_page_free_count >= vm_page_free_target) &&
(vm_page_free_wanted == 0) && (vm_page_free_wanted_privileged == 0)) {
return_from_scan:
assert(vm_pageout_scan_wants_object == VM_OBJECT_NULL);
- VM_DEBUG_EVENT(vm_pageout_scan, VM_PAGEOUT_SCAN, DBG_FUNC_NONE,
- vm_pageout_inactive, vm_pageout_inactive_used, 0, 0);
- VM_DEBUG_EVENT(vm_pageout_scan, VM_PAGEOUT_SCAN, DBG_FUNC_END,
- vm_pageout_speculative_clean, vm_pageout_inactive_clean,
- vm_pageout_inactive_dirty_internal, vm_pageout_inactive_dirty_external);
+ VM_DEBUG_CONSTANT_EVENT(vm_pageout_scan, VM_PAGEOUT_SCAN, DBG_FUNC_NONE,
+ vm_pageout_state.vm_pageout_inactive,
+ vm_pageout_state.vm_pageout_inactive_used, 0, 0);
+ VM_DEBUG_CONSTANT_EVENT(vm_pageout_scan, VM_PAGEOUT_SCAN, DBG_FUNC_END,
+ vm_pageout_vminfo.vm_pageout_freed_speculative,
+ vm_pageout_state.vm_pageout_inactive_clean,
+ vm_pageout_vminfo.vm_pageout_inactive_dirty_internal,
+ vm_pageout_vminfo.vm_pageout_inactive_dirty_external);
return;
}
lck_mtx_unlock(&vm_page_queue_free_lock);
}
-
+
/*
- * Before anything, we check if we have any ripe volatile
+ * Before anything, we check if we have any ripe volatile
* objects around. If so, try to purge the first object.
* If the purge fails, fall through to reclaim a page instead.
* If the purge succeeds, go back to the top and reevalute
* the new memory situation.
*/
- pressure_level = memorystatus_vm_pressure_level;
- assert (available_for_purge>=0);
+ retval = vps_purge_object();
- if (available_for_purge
- || pressure_level > kVMPressureNormal
- ) {
- int force_purge;
-
- if (object != NULL) {
- vm_object_unlock(object);
+ if (retval == VM_PAGEOUT_SCAN_NEXT_ITERATION) {
+ /*
+ * Success
+ */
+ if (object != NULL) {
+ vm_object_unlock(object);
object = NULL;
}
- VM_DEBUG_EVENT(vm_pageout_purgeone, VM_PAGEOUT_PURGEONE, DBG_FUNC_START, vm_page_free_count, 0, 0, 0);
- memoryshot(VM_PAGEOUT_PURGEONE, DBG_FUNC_START);
-
- force_purge = 0; /* no force-purging */
- if (pressure_level >= kVMPressureCritical) {
- force_purge = memorystatus_purge_on_critical;
- } else if (pressure_level >= kVMPressureUrgent) {
- force_purge = memorystatus_purge_on_urgent;
- } else if (pressure_level >= kVMPressureWarning) {
- force_purge = memorystatus_purge_on_warning;
- } else {
- force_purge = 0;
- }
- if (vm_purgeable_object_purge_one(force_purge)) {
-
- VM_DEBUG_EVENT(vm_pageout_purgeone, VM_PAGEOUT_PURGEONE, DBG_FUNC_END, vm_page_free_count, 0, 0, 0);
- memoryshot(VM_PAGEOUT_PURGEONE, DBG_FUNC_END);
- continue;
- }
- VM_DEBUG_EVENT(vm_pageout_purgeone, VM_PAGEOUT_PURGEONE, DBG_FUNC_END, 0, 0, 0, -1);
- memoryshot(VM_PAGEOUT_PURGEONE, DBG_FUNC_END);
+ lock_yield_check = FALSE;
+ continue;
}
- if (queue_empty(&sq->age_q) && vm_page_speculative_count) {
- /*
- * try to pull pages from the aging bins...
- * see vm_page.h for an explanation of how
- * this mechanism works
- */
- struct vm_speculative_age_q *aq;
- mach_timespec_t ts_fully_aged;
- boolean_t can_steal = FALSE;
- int num_scanned_queues;
-
- aq = &vm_page_queue_speculative[speculative_steal_index];
- num_scanned_queues = 0;
- while (queue_empty(&aq->age_q) &&
- num_scanned_queues++ != VM_PAGE_MAX_SPECULATIVE_AGE_Q) {
-
- speculative_steal_index++;
-
- if (speculative_steal_index > VM_PAGE_MAX_SPECULATIVE_AGE_Q)
- speculative_steal_index = VM_PAGE_MIN_SPECULATIVE_AGE_Q;
-
- aq = &vm_page_queue_speculative[speculative_steal_index];
- }
+ /*
+ * If our 'aged' queue is empty and we have some speculative pages
+ * in the other queues, let's go through and see if we need to age
+ * them.
+ *
+ * If we succeeded in aging a speculative Q or just that everything
+ * looks normal w.r.t queue age and queue counts, we keep going onward.
+ *
+ * If, for some reason, we seem to have a mismatch between the spec.
+ * page count and the page queues, we reset those variables and
+ * restart the loop (LD TODO: Track this better?).
+ */
+ if (vm_page_queue_empty(&sq->age_q) && vm_page_speculative_count) {
+ retval = vps_age_speculative_queue(force_speculative_aging);
- if (num_scanned_queues == VM_PAGE_MAX_SPECULATIVE_AGE_Q + 1) {
- /*
- * XXX We've scanned all the speculative
- * queues but still haven't found one
- * that is not empty, even though
- * vm_page_speculative_count is not 0.
- *
- * report the anomaly...
- */
- printf("vm_pageout_scan: "
- "all speculative queues empty "
- "but count=%d. Re-adjusting.\n",
- vm_page_speculative_count);
- if (vm_page_speculative_count > vm_page_speculative_count_drift_max)
- vm_page_speculative_count_drift_max = vm_page_speculative_count;
- vm_page_speculative_count_drifts++;
-#if 6553678
- Debugger("vm_pageout_scan: no speculative pages");
-#endif
- /* readjust... */
- vm_page_speculative_count = 0;
- /* ... and continue */
+ if (retval == VM_PAGEOUT_SCAN_NEXT_ITERATION) {
+ lock_yield_check = FALSE;
continue;
}
-
- if (vm_page_speculative_count > vm_page_speculative_target)
- can_steal = TRUE;
- else {
- ts_fully_aged.tv_sec = (VM_PAGE_MAX_SPECULATIVE_AGE_Q * vm_page_speculative_q_age_ms) / 1000;
- ts_fully_aged.tv_nsec = ((VM_PAGE_MAX_SPECULATIVE_AGE_Q * vm_page_speculative_q_age_ms) % 1000)
- * 1000 * NSEC_PER_USEC;
-
- ADD_MACH_TIMESPEC(&ts_fully_aged, &aq->age_ts);
-
- clock_sec_t sec;
- clock_nsec_t nsec;
- clock_get_system_nanotime(&sec, &nsec);
- ts.tv_sec = (unsigned int) sec;
- ts.tv_nsec = nsec;
-
- if (CMP_MACH_TIMESPEC(&ts, &ts_fully_aged) >= 0)
- can_steal = TRUE;
- }
- if (can_steal == TRUE)
- vm_page_speculate_ageit(aq);
}
- if (queue_empty(&sq->age_q) && cache_evict_throttle == 0) {
- int pages_evicted;
-
- if (object != NULL) {
- vm_object_unlock(object);
- object = NULL;
- }
- pages_evicted = vm_object_cache_evict(100, 10);
-
- if (pages_evicted) {
+ force_speculative_aging = FALSE;
- vm_pageout_cache_evicted += pages_evicted;
-
- VM_DEBUG_EVENT(vm_pageout_cache_evict, VM_PAGEOUT_CACHE_EVICT, DBG_FUNC_NONE,
- vm_page_free_count, pages_evicted, vm_pageout_cache_evicted, 0);
- memoryshot(VM_PAGEOUT_CACHE_EVICT, DBG_FUNC_NONE);
+ /*
+ * Check to see if we need to evict objects from the cache.
+ *
+ * Note: 'object' here doesn't have anything to do with
+ * the eviction part. We just need to make sure we have dropped
+ * any object lock we might be holding if we need to go down
+ * into the eviction logic.
+ */
+ retval = vps_object_cache_evict(&object);
- /*
- * we just freed up to 100 pages,
- * so go back to the top of the main loop
- * and re-evaulate the memory situation
- */
- continue;
- } else
- cache_evict_throttle = 100;
+ if (retval == VM_PAGEOUT_SCAN_NEXT_ITERATION) {
+ lock_yield_check = FALSE;
+ continue;
}
- if (cache_evict_throttle)
- cache_evict_throttle--;
- exceeded_burst_throttle = FALSE;
/*
- * Sometimes we have to pause:
- * 1) No inactive pages - nothing to do.
- * 2) Loop control - no acceptable pages found on the inactive queue
- * within the last vm_pageout_burst_inactive_throttle iterations
- * 3) Flow control - default pageout queue is full
+ * Calculate our filecache_min that will affect the loop
+ * going forward.
*/
- if (queue_empty(&vm_page_queue_inactive) && queue_empty(&vm_page_queue_anonymous) && queue_empty(&sq->age_q)) {
- vm_pageout_scan_empty_throttle++;
- msecs = vm_pageout_empty_wait;
- goto vm_pageout_scan_delay;
-
- } else if (inactive_burst_count >=
- MIN(vm_pageout_burst_inactive_throttle,
- (vm_page_inactive_count +
- vm_page_speculative_count))) {
- vm_pageout_scan_burst_throttle++;
- msecs = vm_pageout_burst_wait;
-
- exceeded_burst_throttle = TRUE;
- goto vm_pageout_scan_delay;
-
- } else if (vm_page_free_count > (vm_page_free_reserved / 4) &&
- VM_PAGEOUT_SCAN_NEEDS_TO_THROTTLE()) {
- vm_pageout_scan_swap_throttle++;
- msecs = vm_pageout_swap_wait;
- goto vm_pageout_scan_delay;
-
- } else if (VM_PAGE_Q_THROTTLED(iq) &&
- VM_DYNAMIC_PAGING_ENABLED(memory_manager_default)) {
- clock_sec_t sec;
- clock_nsec_t nsec;
-
- switch (flow_control.state) {
-
- case FCS_IDLE:
- if ((vm_page_free_count + local_freed) < vm_page_free_target) {
-
- if (vm_page_pageable_external_count > vm_page_filecache_min && !queue_empty(&vm_page_queue_inactive)) {
- anons_grabbed = ANONS_GRABBED_LIMIT;
- goto consider_inactive;
- }
- if (((vm_page_inactive_count + vm_page_speculative_count) < vm_page_inactive_target) && vm_page_active_count)
- continue;
- }
-reset_deadlock_timer:
- ts.tv_sec = vm_pageout_deadlock_wait / 1000;
- ts.tv_nsec = (vm_pageout_deadlock_wait % 1000) * 1000 * NSEC_PER_USEC;
- clock_get_system_nanotime(&sec, &nsec);
- flow_control.ts.tv_sec = (unsigned int) sec;
- flow_control.ts.tv_nsec = nsec;
- ADD_MACH_TIMESPEC(&flow_control.ts, &ts);
-
- flow_control.state = FCS_DELAYED;
- msecs = vm_pageout_deadlock_wait;
-
- break;
-
- case FCS_DELAYED:
- clock_get_system_nanotime(&sec, &nsec);
- ts.tv_sec = (unsigned int) sec;
- ts.tv_nsec = nsec;
-
- if (CMP_MACH_TIMESPEC(&ts, &flow_control.ts) >= 0) {
- /*
- * the pageout thread for the default pager is potentially
- * deadlocked since the
- * default pager queue has been throttled for more than the
- * allowable time... we need to move some clean pages or dirty
- * pages belonging to the external pagers if they aren't throttled
- * vm_page_free_wanted represents the number of threads currently
- * blocked waiting for pages... we'll move one page for each of
- * these plus a fixed amount to break the logjam... once we're done
- * moving this number of pages, we'll re-enter the FSC_DELAYED state
- * with a new timeout target since we have no way of knowing
- * whether we've broken the deadlock except through observation
- * of the queue associated with the default pager... we need to
- * stop moving pages and allow the system to run to see what
- * state it settles into.
- */
- vm_pageout_deadlock_target = vm_pageout_deadlock_relief + vm_page_free_wanted + vm_page_free_wanted_privileged;
- vm_pageout_scan_deadlock_detected++;
- flow_control.state = FCS_DEADLOCK_DETECTED;
- thread_wakeup((event_t) &vm_pageout_garbage_collect);
- goto consider_inactive;
- }
- /*
- * just resniff instead of trying
- * to compute a new delay time... we're going to be
- * awakened immediately upon a laundry completion,
- * so we won't wait any longer than necessary
- */
- msecs = vm_pageout_idle_wait;
- break;
-
- case FCS_DEADLOCK_DETECTED:
- if (vm_pageout_deadlock_target)
- goto consider_inactive;
- goto reset_deadlock_timer;
-
- }
-vm_pageout_scan_delay:
- if (object != NULL) {
- vm_object_unlock(object);
- object = NULL;
- }
- vm_pageout_scan_wants_object = VM_OBJECT_NULL;
-
- if (local_freeq) {
- vm_page_unlock_queues();
-
- VM_DEBUG_EVENT(vm_pageout_freelist, VM_PAGEOUT_FREELIST, DBG_FUNC_START,
- vm_page_free_count, local_freed, delayed_unlock_limit, 3);
+ vps_calculate_filecache_min();
- vm_page_free_list(local_freeq, TRUE);
-
- VM_DEBUG_EVENT(vm_pageout_freelist, VM_PAGEOUT_FREELIST, DBG_FUNC_END,
- vm_page_free_count, local_freed, 0, 3);
-
- local_freeq = NULL;
- local_freed = 0;
- vm_page_lock_queues();
-
- if (flow_control.state == FCS_DELAYED &&
- !VM_PAGE_Q_THROTTLED(iq)) {
- flow_control.state = FCS_IDLE;
- goto consider_inactive;
- }
- }
-
- if (vm_page_free_count >= vm_page_free_target) {
- /*
- * we're here because
- * 1) someone else freed up some pages while we had
- * the queues unlocked above
- * and we've hit one of the 3 conditions that
- * cause us to pause the pageout scan thread
- *
- * since we already have enough free pages,
- * let's avoid stalling and return normally
- *
- * before we return, make sure the pageout I/O threads
- * are running throttled in case there are still requests
- * in the laundry... since we have enough free pages
- * we don't need the laundry to be cleaned in a timely
- * fashion... so let's avoid interfering with foreground
- * activity
- *
- * we don't want to hold vm_page_queue_free_lock when
- * calling vm_pageout_adjust_io_throttles (since it
- * may cause other locks to be taken), we do the intitial
- * check outside of the lock. Once we take the lock,
- * we recheck the condition since it may have changed.
- * if it has, no problem, we will make the threads
- * non-throttled before actually blocking
- */
- vm_pageout_adjust_io_throttles(iq, eq, TRUE);
- }
- lck_mtx_lock(&vm_page_queue_free_lock);
+ /*
+ * LD TODO: Use a structure to hold all state variables for a single
+ * vm_pageout_scan iteration and pass that structure to this function instead.
+ */
+ retval = vps_flow_control(&flow_control, &anons_grabbed, &object,
+ &delayed_unlock, &local_freeq, &local_freed,
+ &vm_pageout_deadlock_target, inactive_burst_count);
- if (vm_page_free_count >= vm_page_free_target &&
- (vm_page_free_wanted == 0) && (vm_page_free_wanted_privileged == 0)) {
- goto return_from_scan;
- }
- lck_mtx_unlock(&vm_page_queue_free_lock);
-
- if ((vm_page_free_count + vm_page_cleaned_count) < vm_page_free_target) {
- /*
- * we're most likely about to block due to one of
- * the 3 conditions that cause vm_pageout_scan to
- * not be able to make forward progress w/r
- * to providing new pages to the free queue,
- * so unthrottle the I/O threads in case we
- * have laundry to be cleaned... it needs
- * to be completed ASAP.
- *
- * even if we don't block, we want the io threads
- * running unthrottled since the sum of free +
- * clean pages is still under our free target
- */
- vm_pageout_adjust_io_throttles(iq, eq, FALSE);
- }
- if (vm_page_cleaned_count > 0 && exceeded_burst_throttle == FALSE) {
- /*
- * if we get here we're below our free target and
- * we're stalling due to a full laundry queue or
- * we don't have any inactive pages other then
- * those in the clean queue...
- * however, we have pages on the clean queue that
- * can be moved to the free queue, so let's not
- * stall the pageout scan
- */
- flow_control.state = FCS_IDLE;
- goto consider_inactive;
+ if (retval == VM_PAGEOUT_SCAN_NEXT_ITERATION) {
+ if (loop_count >= vm_page_inactive_count) {
+ loop_count = 0;
}
- VM_CHECK_MEMORYSTATUS;
-
- if (flow_control.state != FCS_IDLE)
- vm_pageout_scan_throttle++;
- iq->pgo_throttled = TRUE;
-
- if (COMPRESSED_PAGER_IS_ACTIVE || DEFAULT_FREEZER_COMPRESSED_PAGER_IS_ACTIVE)
- vm_consider_waking_compactor_swapper();
-
- assert_wait_timeout((event_t) &iq->pgo_laundry, THREAD_INTERRUPTIBLE, msecs, 1000*NSEC_PER_USEC);
- counter(c_vm_pageout_scan_block++);
-
- vm_page_unlock_queues();
-
- assert(vm_pageout_scan_wants_object == VM_OBJECT_NULL);
-
- VM_DEBUG_EVENT(vm_pageout_thread_block, VM_PAGEOUT_THREAD_BLOCK, DBG_FUNC_START,
- iq->pgo_laundry, iq->pgo_maxlaundry, msecs, 0);
- memoryshot(VM_PAGEOUT_THREAD_BLOCK, DBG_FUNC_START);
- thread_block(THREAD_CONTINUE_NULL);
-
- VM_DEBUG_EVENT(vm_pageout_thread_block, VM_PAGEOUT_THREAD_BLOCK, DBG_FUNC_END,
- iq->pgo_laundry, iq->pgo_maxlaundry, msecs, 0);
- memoryshot(VM_PAGEOUT_THREAD_BLOCK, DBG_FUNC_END);
-
- vm_page_lock_queues();
- delayed_unlock = 1;
-
- iq->pgo_throttled = FALSE;
-
- if (loop_count >= vm_page_inactive_count)
- loop_count = 0;
inactive_burst_count = 0;
- goto Restart;
- /*NOTREACHED*/
- }
+ assert(object == NULL);
+ assert(delayed_unlock != 0);
+ lock_yield_check = FALSE;
+ continue;
+ } else if (retval == VM_PAGEOUT_SCAN_DONE_RETURN) {
+ goto return_from_scan;
+ }
flow_control.state = FCS_IDLE;
-consider_inactive:
- vm_pageout_inactive_external_forced_reactivate_limit = MIN((vm_page_active_count + vm_page_inactive_count),
- vm_pageout_inactive_external_forced_reactivate_limit);
+
+ vm_pageout_inactive_external_forced_reactivate_limit = MIN((vm_page_active_count + vm_page_inactive_count),
+ vm_pageout_inactive_external_forced_reactivate_limit);
loop_count++;
inactive_burst_count++;
- vm_pageout_inactive++;
-
+ vm_pageout_state.vm_pageout_inactive++;
/*
* Choose a victim.
*/
- while (1) {
- m = NULL;
-
- if (VM_DYNAMIC_PAGING_ENABLED(memory_manager_default)) {
- assert(vm_page_throttled_count == 0);
- assert(queue_empty(&vm_page_queue_throttled));
- }
- /*
- * The most eligible pages are ones we paged in speculatively,
- * but which have not yet been touched.
- */
- if (!queue_empty(&sq->age_q) ) {
- m = (vm_page_t) queue_first(&sq->age_q);
- page_prev_state = PAGE_STATE_SPECULATIVE;
+ m = NULL;
+ retval = vps_choose_victim_page(&m, &anons_grabbed, &grab_anonymous, force_anonymous, &page_from_bg_q, &reactivated_this_call);
- break;
- }
- /*
- * Try a clean-queue inactive page.
- */
- if (!queue_empty(&vm_page_queue_cleaned)) {
- m = (vm_page_t) queue_first(&vm_page_queue_cleaned);
-
- page_prev_state = PAGE_STATE_CLEAN;
-
- break;
- }
-
- grab_anonymous = (vm_page_anonymous_count > vm_page_anonymous_min);
-
- if (vm_page_pageable_external_count < vm_page_filecache_min || force_anonymous == TRUE) {
- grab_anonymous = TRUE;
- anons_grabbed = 0;
- }
-
- if (grab_anonymous == TRUE && vm_compression_available() == FALSE)
- grab_anonymous = FALSE;
-
- if (grab_anonymous == FALSE || anons_grabbed >= ANONS_GRABBED_LIMIT || queue_empty(&vm_page_queue_anonymous)) {
-
- if ( !queue_empty(&vm_page_queue_inactive) ) {
- m = (vm_page_t) queue_first(&vm_page_queue_inactive);
-
- page_prev_state = PAGE_STATE_INACTIVE;
- anons_grabbed = 0;
+ if (m == NULL) {
+ if (retval == VM_PAGEOUT_SCAN_NEXT_ITERATION) {
+ inactive_burst_count = 0;
- break;
+ if (page_prev_q_state == VM_PAGE_ON_INACTIVE_CLEANED_Q) {
+ VM_PAGEOUT_DEBUG(vm_pageout_cleaned_reactivated, 1);
}
- }
- if ( !queue_empty(&vm_page_queue_anonymous) ) {
- m = (vm_page_t) queue_first(&vm_page_queue_anonymous);
- page_prev_state = PAGE_STATE_ANONYMOUS;
- anons_grabbed++;
-
- break;
+ lock_yield_check = TRUE;
+ continue;
}
/*
* if we've gotten here, we have no victim page.
- * if making clean, free the local freed list and return.
- * if making free, check to see if we've finished balancing the queues
- * yet, if we haven't just continue, else panic
+ * check to see if we've not finished balancing the queues
+ * or we have a page on the aged speculative queue that we
+ * skipped due to force_anonymous == TRUE.. or we have
+ * speculative pages that we can prematurely age... if
+ * one of these cases we'll keep going, else panic
*/
- vm_page_unlock_queues();
-
- if (object != NULL) {
- vm_object_unlock(object);
- object = NULL;
- }
- vm_pageout_scan_wants_object = VM_OBJECT_NULL;
-
- if (local_freeq) {
- VM_DEBUG_EVENT(vm_pageout_freelist, VM_PAGEOUT_FREELIST, DBG_FUNC_START,
- vm_page_free_count, local_freed, delayed_unlock_limit, 5);
-
- vm_page_free_list(local_freeq, TRUE);
-
- VM_DEBUG_EVENT(vm_pageout_freelist, VM_PAGEOUT_FREELIST, DBG_FUNC_END,
- vm_page_free_count, local_freed, 0, 5);
-
- local_freeq = NULL;
- local_freed = 0;
- }
- vm_page_lock_queues();
- delayed_unlock = 1;
+ force_anonymous = FALSE;
+ VM_PAGEOUT_DEBUG(vm_pageout_no_victim, 1);
- if ((vm_page_inactive_count + vm_page_speculative_count) < vm_page_inactive_target)
- goto Restart;
+ if (!vm_page_queue_empty(&sq->age_q)) {
+ lock_yield_check = TRUE;
+ continue;
+ }
+ if (vm_page_speculative_count) {
+ force_speculative_aging = TRUE;
+ lock_yield_check = TRUE;
+ continue;
+ }
panic("vm_pageout: no victim");
-
+
/* NOTREACHED */
}
+
+ assert(VM_PAGE_PAGEABLE(m));
+ m_object = VM_PAGE_OBJECT(m);
force_anonymous = FALSE;
-
+
+ page_prev_q_state = m->vmp_q_state;
/*
* we just found this page on one of our queues...
* it can't also be on the pageout queue, so safe
- * to call VM_PAGE_QUEUES_REMOVE
+ * to call vm_page_queues_remove
*/
- assert(!m->pageout_queue);
+ vm_page_queues_remove(m, TRUE);
- VM_PAGE_QUEUES_REMOVE(m);
+ assert(!m->vmp_laundry);
+ assert(!m->vmp_private);
+ assert(!m->vmp_fictitious);
+ assert(m_object != kernel_object);
+ assert(VM_PAGE_GET_PHYS_PAGE(m) != vm_page_guard_addr);
- assert(!m->laundry);
- assert(!m->private);
- assert(!m->fictitious);
- assert(m->object != kernel_object);
- assert(m->phys_page != vm_page_guard_addr);
-
-
- if (page_prev_state != PAGE_STATE_SPECULATIVE)
- vm_pageout_stats[vm_pageout_stat_now].considered++;
+ vm_pageout_vminfo.vm_pageout_considered_page++;
DTRACE_VM2(scan, int, 1, (uint64_t *), NULL);
/*
* check to see if we currently are working
* with the same object... if so, we've
- * already got the lock
- */
- if (m->object != object) {
- /*
- * the object associated with candidate page is
- * different from the one we were just working
- * with... dump the lock if we still own it
- */
- if (object != NULL) {
- vm_object_unlock(object);
- object = NULL;
- vm_pageout_scan_wants_object = VM_OBJECT_NULL;
- }
- /*
- * Try to lock object; since we've alread got the
- * page queues lock, we can only 'try' for this one.
- * if the 'try' fails, we need to do a mutex_pause
- * to allow the owner of the object lock a chance to
- * run... otherwise, we're likely to trip over this
- * object in the same state as we work our way through
- * the queue... clumps of pages associated with the same
- * object are fairly typical on the inactive and active queues
- */
- if (!vm_object_lock_try_scan(m->object)) {
- vm_page_t m_want = NULL;
-
- vm_pageout_inactive_nolock++;
-
- if (page_prev_state == PAGE_STATE_CLEAN)
- vm_pageout_cleaned_nolock++;
-
- if (page_prev_state == PAGE_STATE_SPECULATIVE)
- page_prev_state = PAGE_STATE_INACTIVE_FIRST;
-
- pmap_clear_reference(m->phys_page);
- m->reference = FALSE;
-
- /*
- * m->object must be stable since we hold the page queues lock...
- * we can update the scan_collisions field sans the object lock
- * since it is a separate field and this is the only spot that does
- * a read-modify-write operation and it is never executed concurrently...
- * we can asynchronously set this field to 0 when creating a UPL, so it
- * is possible for the value to be a bit non-determistic, but that's ok
- * since it's only used as a hint
- */
- m->object->scan_collisions++;
-
- if ( !queue_empty(&sq->age_q) )
- m_want = (vm_page_t) queue_first(&sq->age_q);
- else if ( !queue_empty(&vm_page_queue_cleaned))
- m_want = (vm_page_t) queue_first(&vm_page_queue_cleaned);
- else if (anons_grabbed >= ANONS_GRABBED_LIMIT || queue_empty(&vm_page_queue_anonymous))
- m_want = (vm_page_t) queue_first(&vm_page_queue_inactive);
- else if ( !queue_empty(&vm_page_queue_anonymous))
- m_want = (vm_page_t) queue_first(&vm_page_queue_anonymous);
-
- /*
- * this is the next object we're going to be interested in
- * try to make sure its available after the mutex_yield
- * returns control
- */
- if (m_want)
- vm_pageout_scan_wants_object = m_want->object;
-
- /*
- * force us to dump any collected free pages
- * and to pause before moving on
- */
- try_failed = TRUE;
-
- goto requeue_page;
- }
- object = m->object;
- vm_pageout_scan_wants_object = VM_OBJECT_NULL;
+ * already got the lock
+ */
+ if (m_object != object) {
+ boolean_t avoid_anon_pages = (grab_anonymous == FALSE || anons_grabbed >= ANONS_GRABBED_LIMIT);
- try_failed = FALSE;
- }
- if (catch_up_count)
- catch_up_count--;
+ /*
+ * vps_switch_object() will always drop the 'object' lock first
+ * and then try to acquire the 'm_object' lock. So 'object' has to point to
+ * either 'm_object' or NULL.
+ */
+ retval = vps_switch_object(m, m_object, &object, page_prev_q_state, avoid_anon_pages, page_from_bg_q);
- if (m->busy) {
- if (m->encrypted_cleaning) {
- /*
- * ENCRYPTED SWAP:
- * if this page has already been picked up as
- * part of a page-out cluster, it will be busy
- * because it is being encrypted (see
- * vm_object_upl_request()). But we still
- * want to demote it from "clean-in-place"
- * (aka "adjacent") to "clean-and-free" (aka
- * "target"), so let's ignore its "busy" bit
- * here and proceed to check for "cleaning" a
- * little bit below...
- *
- * CAUTION CAUTION:
- * A "busy" page should still be left alone for
- * most purposes, so we have to be very careful
- * not to process that page too much.
- */
- assert(m->cleaning);
- goto consider_inactive_page;
+ if (retval == VM_PAGEOUT_SCAN_NEXT_ITERATION) {
+ lock_yield_check = TRUE;
+ continue;
}
+ }
+ assert(m_object == object);
+ assert(VM_PAGE_OBJECT(m) == m_object);
+ if (m->vmp_busy) {
/*
* Somebody is already playing with this page.
* Put it back on the appropriate queue
*
*/
- vm_pageout_inactive_busy++;
+ VM_PAGEOUT_DEBUG(vm_pageout_inactive_busy, 1);
- if (page_prev_state == PAGE_STATE_CLEAN)
- vm_pageout_cleaned_busy++;
-
-requeue_page:
- switch (page_prev_state) {
+ if (page_prev_q_state == VM_PAGE_ON_INACTIVE_CLEANED_Q) {
+ VM_PAGEOUT_DEBUG(vm_pageout_cleaned_busy, 1);
+ }
- case PAGE_STATE_SPECULATIVE:
- vm_page_speculate(m, FALSE);
- break;
+ vps_requeue_page(m, page_prev_q_state, page_from_bg_q);
- case PAGE_STATE_ANONYMOUS:
- case PAGE_STATE_CLEAN:
- case PAGE_STATE_INACTIVE:
- VM_PAGE_ENQUEUE_INACTIVE(m, FALSE);
- break;
+ lock_yield_check = TRUE;
+ continue;
+ }
- case PAGE_STATE_INACTIVE_FIRST:
- VM_PAGE_ENQUEUE_INACTIVE(m, TRUE);
- break;
- }
- goto done_with_inactivepage;
+ /*
+ * if (m->vmp_cleaning && !m->vmp_free_when_done)
+ * If already cleaning this page in place
+ * just leave if off the paging queues.
+ * We can leave the page mapped, and upl_commit_range
+ * will put it on the clean queue.
+ *
+ * if (m->vmp_free_when_done && !m->vmp_cleaning)
+ * an msync INVALIDATE is in progress...
+ * this page has been marked for destruction
+ * after it has been cleaned,
+ * but not yet gathered into a UPL
+ * where 'cleaning' will be set...
+ * just leave it off the paging queues
+ *
+ * if (m->vmp_free_when_done && m->vmp_clenaing)
+ * an msync INVALIDATE is in progress
+ * and the UPL has already gathered this page...
+ * just leave it off the paging queues
+ */
+ if (m->vmp_free_when_done || m->vmp_cleaning) {
+ lock_yield_check = TRUE;
+ continue;
}
* from reclaiming it - busy or cleaning - that we've already
* dealt with
*/
- if (m->absent || m->error || !object->alive) {
-
- if (m->absent)
- vm_pageout_inactive_absent++;
- else if (!object->alive)
- vm_pageout_inactive_notalive++;
- else
- vm_pageout_inactive_error++;
-reclaim_page:
+ if (m->vmp_absent || m->vmp_error || !object->alive) {
+ if (m->vmp_absent) {
+ VM_PAGEOUT_DEBUG(vm_pageout_inactive_absent, 1);
+ } else if (!object->alive) {
+ VM_PAGEOUT_DEBUG(vm_pageout_inactive_notalive, 1);
+ } else {
+ VM_PAGEOUT_DEBUG(vm_pageout_inactive_error, 1);
+ }
+reclaim_page:
if (vm_pageout_deadlock_target) {
- vm_pageout_scan_inactive_throttle_success++;
- vm_pageout_deadlock_target--;
+ VM_PAGEOUT_DEBUG(vm_pageout_scan_inactive_throttle_success, 1);
+ vm_pageout_deadlock_target--;
}
DTRACE_VM2(dfree, int, 1, (uint64_t *), NULL);
} else {
DTRACE_VM2(fsfree, int, 1, (uint64_t *), NULL);
}
- assert(!m->cleaning);
- assert(!m->laundry);
+ assert(!m->vmp_cleaning);
+ assert(!m->vmp_laundry);
+
+ if (!object->internal &&
+ object->pager != NULL &&
+ object->pager->mo_pager_ops == &shared_region_pager_ops) {
+ shared_region_pager_reclaimed++;
+ }
- m->busy = TRUE;
+ m->vmp_busy = TRUE;
/*
* remove page from object here since we're already
* we'd normally do in vm_page_free_prepare_object
* until 'vm_page_free_list' is called
*/
- if (m->tabled)
+ if (m->vmp_tabled) {
vm_page_remove(m, TRUE);
+ }
- assert(m->pageq.next == NULL &&
- m->pageq.prev == NULL);
- m->pageq.next = (queue_entry_t)local_freeq;
+ assert(m->vmp_pageq.next == 0 && m->vmp_pageq.prev == 0);
+ m->vmp_snext = local_freeq;
local_freeq = m;
local_freed++;
-
- if (page_prev_state == PAGE_STATE_SPECULATIVE)
- vm_pageout_freed_from_speculative++;
- else if (page_prev_state == PAGE_STATE_CLEAN)
- vm_pageout_freed_from_cleaned++;
- else
- vm_pageout_freed_from_inactive_clean++;
- if (page_prev_state != PAGE_STATE_SPECULATIVE)
- vm_pageout_stats[vm_pageout_stat_now].reclaimed++;
+ if (page_prev_q_state == VM_PAGE_ON_SPECULATIVE_Q) {
+ vm_pageout_vminfo.vm_pageout_freed_speculative++;
+ } else if (page_prev_q_state == VM_PAGE_ON_INACTIVE_CLEANED_Q) {
+ vm_pageout_vminfo.vm_pageout_freed_cleaned++;
+ } else if (page_prev_q_state == VM_PAGE_ON_INACTIVE_INTERNAL_Q) {
+ vm_pageout_vminfo.vm_pageout_freed_internal++;
+ } else {
+ vm_pageout_vminfo.vm_pageout_freed_external++;
+ }
+
+ inactive_burst_count = 0;
- goto done_with_inactivepage;
+ lock_yield_check = TRUE;
+ continue;
}
- /*
- * If the object is empty, the page must be reclaimed even
- * if dirty or used.
- * If the page belongs to a volatile object, we stick it back
- * on.
- */
if (object->copy == VM_OBJECT_NULL) {
+ /*
+ * No one else can have any interest in this page.
+ * If this is an empty purgable object, the page can be
+ * reclaimed even if dirty.
+ * If the page belongs to a volatile purgable object, we
+ * reactivate it if the compressor isn't active.
+ */
if (object->purgable == VM_PURGABLE_EMPTY) {
- if (m->pmapped == TRUE) {
+ if (m->vmp_pmapped == TRUE) {
/* unmap the page */
- refmod_state = pmap_disconnect(m->phys_page);
+ refmod_state = pmap_disconnect(VM_PAGE_GET_PHYS_PAGE(m));
if (refmod_state & VM_MEM_MODIFIED) {
SET_PAGE_DIRTY(m, FALSE);
}
}
- if (m->dirty || m->precious) {
+ if (m->vmp_dirty || m->vmp_precious) {
/* we saved the cost of cleaning this page ! */
vm_page_purged_count++;
}
goto reclaim_page;
}
- if (COMPRESSED_PAGER_IS_ACTIVE || DEFAULT_FREEZER_COMPRESSED_PAGER_IS_ACTIVE) {
+ if (VM_CONFIG_COMPRESSOR_IS_ACTIVE) {
/*
* With the VM compressor, the cost of
* reclaiming a page is much lower (no I/O),
/* just stick it back on! */
reactivated_this_call++;
- if (page_prev_state == PAGE_STATE_CLEAN)
- vm_pageout_cleaned_volatile_reactivated++;
+ if (page_prev_q_state == VM_PAGE_ON_INACTIVE_CLEANED_Q) {
+ VM_PAGEOUT_DEBUG(vm_pageout_cleaned_volatile_reactivated, 1);
+ }
goto reactivate_page;
}
}
-
-consider_inactive_page:
- if (m->busy) {
- /*
- * CAUTION CAUTION:
- * A "busy" page should always be left alone, except...
- */
- if (m->cleaning && m->encrypted_cleaning) {
- /*
- * ENCRYPTED_SWAP:
- * We could get here with a "busy" page
- * if it's being encrypted during a
- * "clean-in-place" operation. We'll deal
- * with it right away by testing if it has been
- * referenced and either reactivating it or
- * promoting it from "clean-in-place" to
- * "clean-and-free".
- */
- } else {
- panic("\"busy\" page considered for pageout\n");
- }
- }
-
/*
* If it's being used, reactivate.
* (Fictitious pages are either busy or absent.)
*/
refmod_state = -1;
- if (m->reference == FALSE && m->pmapped == TRUE) {
- refmod_state = pmap_get_refmod(m->phys_page);
-
- if (refmod_state & VM_MEM_REFERENCED)
- m->reference = TRUE;
- if (refmod_state & VM_MEM_MODIFIED) {
+ if (m->vmp_reference == FALSE && m->vmp_pmapped == TRUE) {
+ refmod_state = pmap_get_refmod(VM_PAGE_GET_PHYS_PAGE(m));
+
+ if (refmod_state & VM_MEM_REFERENCED) {
+ m->vmp_reference = TRUE;
+ }
+ if (refmod_state & VM_MEM_MODIFIED) {
SET_PAGE_DIRTY(m, FALSE);
}
}
-
- /*
- * if (m->cleaning && !m->pageout)
- * If already cleaning this page in place and it hasn't
- * been recently referenced, just pull off the queue.
- * We can leave the page mapped, and upl_commit_range
- * will put it on the clean queue.
- *
- * note: if m->encrypted_cleaning == TRUE, then
- * m->cleaning == TRUE
- * and we'll handle it here
- *
- * if (m->pageout && !m->cleaning)
- * an msync INVALIDATE is in progress...
- * this page has been marked for destruction
- * after it has been cleaned,
- * but not yet gathered into a UPL
- * where 'cleaning' will be set...
- * just leave it off the paging queues
- *
- * if (m->pageout && m->clenaing)
- * an msync INVALIDATE is in progress
- * and the UPL has already gathered this page...
- * just leave it off the paging queues
- */
-
- /*
- * page with m->pageout and still on the queues means that an
- * MS_INVALIDATE is in progress on this page... leave it alone
- */
- if (m->pageout) {
- goto done_with_inactivepage;
- }
-
- /* if cleaning, reactivate if referenced. otherwise, just pull off queue */
- if (m->cleaning) {
- if (m->reference == TRUE) {
- reactivated_this_call++;
- goto reactivate_page;
- } else {
- goto done_with_inactivepage;
- }
+
+ if (m->vmp_reference || m->vmp_dirty) {
+ /* deal with a rogue "reusable" page */
+ VM_PAGEOUT_SCAN_HANDLE_REUSABLE_PAGE(m, m_object);
}
- if (m->reference || m->dirty) {
- /* deal with a rogue "reusable" page */
- VM_PAGEOUT_SCAN_HANDLE_REUSABLE_PAGE(m);
- }
+ if (vm_pageout_state.vm_page_xpmapped_min_divisor == 0) {
+ vm_pageout_state.vm_page_xpmapped_min = 0;
+ } else {
+ vm_pageout_state.vm_page_xpmapped_min = (vm_page_external_count * 10) / vm_pageout_state.vm_page_xpmapped_min_divisor;
+ }
- if (m->reference && !m->no_cache) {
+ if (!m->vmp_no_cache &&
+ page_from_bg_q == FALSE &&
+ (m->vmp_reference || (m->vmp_xpmapped && !object->internal &&
+ (vm_page_xpmapped_external_count < vm_pageout_state.vm_page_xpmapped_min)))) {
/*
* The page we pulled off the inactive list has
* been referenced. It is possible for other
* reactivations.
*/
if (++reactivated_this_call >= reactivate_limit) {
- vm_pageout_reactivation_limit_exceeded++;
- } else if (catch_up_count) {
- vm_pageout_catch_ups++;
+ vm_pageout_vminfo.vm_pageout_reactivation_limit_exceeded++;
} else if (++inactive_reclaim_run >= VM_PAGEOUT_INACTIVE_FORCE_RECLAIM) {
- vm_pageout_inactive_force_reclaim++;
+ vm_pageout_vminfo.vm_pageout_inactive_force_reclaim++;
} else {
uint32_t isinuse;
- if (page_prev_state == PAGE_STATE_CLEAN)
- vm_pageout_cleaned_reference_reactivated++;
-
+ if (page_prev_q_state == VM_PAGE_ON_INACTIVE_CLEANED_Q) {
+ VM_PAGEOUT_DEBUG(vm_pageout_cleaned_reference_reactivated, 1);
+ }
+
+ vm_pageout_vminfo.vm_pageout_inactive_referenced++;
reactivate_page:
- if ( !object->internal && object->pager != MEMORY_OBJECT_NULL &&
- vnode_pager_get_isinuse(object->pager, &isinuse) == KERN_SUCCESS && !isinuse) {
+ if (!object->internal && object->pager != MEMORY_OBJECT_NULL &&
+ vnode_pager_get_isinuse(object->pager, &isinuse) == KERN_SUCCESS && !isinuse) {
/*
* no explict mappings of this object exist
* and it's not open via the filesystem
*/
vm_page_deactivate(m);
- vm_pageout_inactive_deactivated++;
+ VM_PAGEOUT_DEBUG(vm_pageout_inactive_deactivated, 1);
} else {
/*
* The page was/is being used, so put back on active list.
*/
vm_page_activate(m);
VM_STAT_INCR(reactivations);
+ inactive_burst_count = 0;
+ }
+#if CONFIG_BACKGROUND_QUEUE
+#if DEVELOPMENT || DEBUG
+ if (page_from_bg_q == TRUE) {
+ if (m_object->internal) {
+ vm_pageout_rejected_bq_internal++;
+ } else {
+ vm_pageout_rejected_bq_external++;
+ }
}
-
- if (page_prev_state == PAGE_STATE_CLEAN)
- vm_pageout_cleaned_reactivated++;
+#endif /* DEVELOPMENT || DEBUG */
+#endif /* CONFIG_BACKGROUND_QUEUE */
- vm_pageout_inactive_used++;
+ if (page_prev_q_state == VM_PAGE_ON_INACTIVE_CLEANED_Q) {
+ VM_PAGEOUT_DEBUG(vm_pageout_cleaned_reactivated, 1);
+ }
+ vm_pageout_state.vm_pageout_inactive_used++;
- goto done_with_inactivepage;
+ lock_yield_check = TRUE;
+ continue;
}
- /*
+ /*
* Make sure we call pmap_get_refmod() if it
* wasn't already called just above, to update
* the dirty bit.
*/
- if ((refmod_state == -1) && !m->dirty && m->pmapped) {
- refmod_state = pmap_get_refmod(m->phys_page);
+ if ((refmod_state == -1) && !m->vmp_dirty && m->vmp_pmapped) {
+ refmod_state = pmap_get_refmod(VM_PAGE_GET_PHYS_PAGE(m));
if (refmod_state & VM_MEM_MODIFIED) {
SET_PAGE_DIRTY(m, FALSE);
}
}
- forced_reclaim = TRUE;
- } else {
- forced_reclaim = FALSE;
}
- XPR(XPR_VM_PAGEOUT,
- "vm_pageout_scan, replace object 0x%X offset 0x%X page 0x%X\n",
- object, m->offset, m, 0,0);
-
/*
* we've got a candidate page to steal...
*
- * m->dirty is up to date courtesy of the
- * preceding check for m->reference... if
- * we get here, then m->reference had to be
+ * m->vmp_dirty is up to date courtesy of the
+ * preceding check for m->vmp_reference... if
+ * we get here, then m->vmp_reference had to be
* FALSE (or possibly "reactivate_limit" was
- * exceeded), but in either case we called
- * pmap_get_refmod() and updated both
- * m->reference and m->dirty
+ * exceeded), but in either case we called
+ * pmap_get_refmod() and updated both
+ * m->vmp_reference and m->vmp_dirty
*
* if it's dirty or precious we need to
* see if the target queue is throtttled
inactive_throttled = FALSE;
- if (m->dirty || m->precious) {
- if (object->internal) {
- if (VM_PAGE_Q_THROTTLED(iq))
- inactive_throttled = TRUE;
+ if (m->vmp_dirty || m->vmp_precious) {
+ if (object->internal) {
+ if (VM_PAGE_Q_THROTTLED(iq)) {
+ inactive_throttled = TRUE;
+ }
} else if (VM_PAGE_Q_THROTTLED(eq)) {
inactive_throttled = TRUE;
}
}
throttle_inactive:
- if (!VM_DYNAMIC_PAGING_ENABLED(memory_manager_default) &&
- object->internal && m->dirty &&
+ if (!VM_DYNAMIC_PAGING_ENABLED() &&
+ object->internal && m->vmp_dirty &&
(object->purgable == VM_PURGABLE_DENY ||
- object->purgable == VM_PURGABLE_NONVOLATILE ||
- object->purgable == VM_PURGABLE_VOLATILE)) {
- queue_enter(&vm_page_queue_throttled, m,
- vm_page_t, pageq);
- m->throttled = TRUE;
+ object->purgable == VM_PURGABLE_NONVOLATILE ||
+ object->purgable == VM_PURGABLE_VOLATILE)) {
+ vm_page_check_pageable_safe(m);
+ assert(m->vmp_q_state == VM_PAGE_NOT_ON_Q);
+ vm_page_queue_enter(&vm_page_queue_throttled, m, vmp_pageq);
+ m->vmp_q_state = VM_PAGE_ON_THROTTLED_Q;
vm_page_throttled_count++;
- vm_pageout_scan_reclaimed_throttled++;
+ VM_PAGEOUT_DEBUG(vm_pageout_scan_reclaimed_throttled, 1);
+
+ inactive_burst_count = 0;
- goto done_with_inactivepage;
+ lock_yield_check = TRUE;
+ continue;
}
if (inactive_throttled == TRUE) {
+ vps_deal_with_throttled_queues(m, &object, &vm_pageout_inactive_external_forced_reactivate_limit,
+ &delayed_unlock, &force_anonymous, page_from_bg_q);
- if (object->internal == FALSE) {
- /*
- * we need to break up the following potential deadlock case...
- * a) The external pageout thread is stuck on the truncate lock for a file that is being extended i.e. written.
- * b) The thread doing the writing is waiting for pages while holding the truncate lock
- * c) Most of the pages in the inactive queue belong to this file.
- *
- * we are potentially in this deadlock because...
- * a) the external pageout queue is throttled
- * b) we're done with the active queue and moved on to the inactive queue
- * c) we've got a dirty external page
- *
- * since we don't know the reason for the external pageout queue being throttled we
- * must suspect that we are deadlocked, so move the current page onto the active queue
- * in an effort to cause a page from the active queue to 'age' to the inactive queue
- *
- * if we don't have jetsam configured (i.e. we have a dynamic pager), set
- * 'force_anonymous' to TRUE to cause us to grab a page from the cleaned/anonymous
- * pool the next time we select a victim page... if we can make enough new free pages,
- * the deadlock will break, the external pageout queue will empty and it will no longer
- * be throttled
- *
- * if we have jestam configured, keep a count of the pages reactivated this way so
- * that we can try to find clean pages in the active/inactive queues before
- * deciding to jetsam a process
- */
- vm_pageout_scan_inactive_throttled_external++;
-
- queue_enter(&vm_page_queue_active, m, vm_page_t, pageq);
- m->active = TRUE;
- vm_page_active_count++;
- if (m->object->internal) {
- vm_page_pageable_internal_count++;
- } else {
- vm_page_pageable_external_count++;
- }
-
- vm_pageout_adjust_io_throttles(iq, eq, FALSE);
-
-#if CONFIG_MEMORYSTATUS && CONFIG_JETSAM
- vm_pageout_inactive_external_forced_reactivate_limit--;
-
- if (vm_pageout_inactive_external_forced_reactivate_limit <= 0) {
- vm_pageout_inactive_external_forced_reactivate_limit = vm_page_active_count + vm_page_inactive_count;
- /*
- * Possible deadlock scenario so request jetsam action
- */
- assert(object);
- vm_object_unlock(object);
- object = VM_OBJECT_NULL;
- vm_page_unlock_queues();
-
- VM_DEBUG_EVENT(vm_pageout_jetsam, VM_PAGEOUT_JETSAM, DBG_FUNC_START,
- vm_page_active_count, vm_page_inactive_count, vm_page_free_count, vm_page_free_count);
-
- /* Kill first suitable process */
- if (memorystatus_kill_on_VM_page_shortage(FALSE) == FALSE) {
- panic("vm_pageout_scan: Jetsam request failed\n");
- }
-
- VM_DEBUG_EVENT(vm_pageout_jetsam, VM_PAGEOUT_JETSAM, DBG_FUNC_END, 0, 0, 0, 0);
-
- vm_pageout_inactive_external_forced_jetsam_count++;
- vm_page_lock_queues();
- delayed_unlock = 1;
- }
-#else /* CONFIG_MEMORYSTATUS && CONFIG_JETSAM */
- force_anonymous = TRUE;
-#endif
- goto done_with_inactivepage;
- } else {
- if (page_prev_state == PAGE_STATE_SPECULATIVE)
- page_prev_state = PAGE_STATE_INACTIVE;
-
- vm_pageout_scan_inactive_throttled_internal++;
+ inactive_burst_count = 0;
- goto requeue_page;
+ if (page_prev_q_state == VM_PAGE_ON_INACTIVE_CLEANED_Q) {
+ VM_PAGEOUT_DEBUG(vm_pageout_cleaned_reactivated, 1);
}
+
+ lock_yield_check = TRUE;
+ continue;
}
/*
* we have the up-to-date modified state
*
* if we need to do a pmap_disconnect then we
- * need to re-evaluate m->dirty since the pmap_disconnect
- * provides the true state atomically... the
+ * need to re-evaluate m->vmp_dirty since the pmap_disconnect
+ * provides the true state atomically... the
* page was still mapped up to the pmap_disconnect
* and may have been dirtied at the last microsecond
*
* Note that if 'pmapped' is FALSE then the page is not
* and has not been in any map, so there is no point calling
- * pmap_disconnect(). m->dirty could have been set in anticipation
+ * pmap_disconnect(). m->vmp_dirty could have been set in anticipation
* of likely usage of the page.
*/
- if (m->pmapped == TRUE) {
+ if (m->vmp_pmapped == TRUE) {
+ int pmap_options;
- if (DEFAULT_PAGER_IS_ACTIVE || DEFAULT_FREEZER_IS_ACTIVE || object->internal == FALSE) {
- refmod_state = pmap_disconnect_options(m->phys_page, 0, NULL);
+ /*
+ * Don't count this page as going into the compressor
+ * if any of these are true:
+ * 1) compressed pager isn't enabled
+ * 2) Freezer enabled device with compressed pager
+ * backend (exclusive use) i.e. most of the VM system
+ * (including vm_pageout_scan) has no knowledge of
+ * the compressor
+ * 3) This page belongs to a file and hence will not be
+ * sent into the compressor
+ */
+ if (!VM_CONFIG_COMPRESSOR_IS_ACTIVE ||
+ object->internal == FALSE) {
+ pmap_options = 0;
+ } else if (m->vmp_dirty || m->vmp_precious) {
+ /*
+ * VM knows that this page is dirty (or
+ * precious) and needs to be compressed
+ * rather than freed.
+ * Tell the pmap layer to count this page
+ * as "compressed".
+ */
+ pmap_options = PMAP_OPTIONS_COMPRESSOR;
} else {
- refmod_state = pmap_disconnect_options(m->phys_page, PMAP_OPTIONS_COMPRESSOR, NULL);
+ /*
+ * VM does not know if the page needs to
+ * be preserved but the pmap layer might tell
+ * us if any mapping has "modified" it.
+ * Let's the pmap layer to count this page
+ * as compressed if and only if it has been
+ * modified.
+ */
+ pmap_options =
+ PMAP_OPTIONS_COMPRESSOR_IFF_MODIFIED;
}
-
+ refmod_state = pmap_disconnect_options(VM_PAGE_GET_PHYS_PAGE(m),
+ pmap_options,
+ NULL);
if (refmod_state & VM_MEM_MODIFIED) {
SET_PAGE_DIRTY(m, FALSE);
}
}
+
/*
- * reset our count of pages that have been reclaimed
+ * reset our count of pages that have been reclaimed
* since the last page was 'stolen'
*/
inactive_reclaim_run = 0;
/*
* If it's clean and not precious, we can free the page.
*/
- if (!m->dirty && !m->precious) {
-
- if (page_prev_state == PAGE_STATE_SPECULATIVE)
- vm_pageout_speculative_clean++;
- else {
- if (page_prev_state == PAGE_STATE_ANONYMOUS)
- vm_pageout_inactive_anonymous++;
- else if (page_prev_state == PAGE_STATE_CLEAN)
- vm_pageout_cleaned_reclaimed++;
-
- if (m->was_dirty) {
- /* page on clean queue used to be dirty; we should increment the vm_stat pageout count here */
- VM_STAT_INCR(pageouts);
- DTRACE_VM2(pgout, int, 1, (uint64_t *), NULL);
- }
- vm_pageout_inactive_clean++;
- }
+ if (!m->vmp_dirty && !m->vmp_precious) {
+ vm_pageout_state.vm_pageout_inactive_clean++;
/*
* OK, at this point we have found a page we are going to free.
*/
+#if CONFIG_PHANTOM_CACHE
+ if (!object->internal) {
+ vm_phantom_cache_add_ghost(m);
+ }
+#endif
goto reclaim_page;
}
* disconnected here, we can make one final check.
*/
if (object->internal) {
- if (VM_PAGE_Q_THROTTLED(iq))
+ if (VM_PAGE_Q_THROTTLED(iq)) {
inactive_throttled = TRUE;
+ }
} else if (VM_PAGE_Q_THROTTLED(eq)) {
inactive_throttled = TRUE;
}
- if (inactive_throttled == TRUE)
+ if (inactive_throttled == TRUE) {
goto throttle_inactive;
-
-#if VM_PRESSURE_EVENTS
- vm_pressure_response();
-#endif /* VM_PRESSURE_EVENTS */
-
- /*
- * do NOT set the pageout bit!
- * sure, we might need free pages, but this page is going to take time to become free
- * anyway, so we may as well put it on the clean queue first and take it from there later
- * if necessary. that way, we'll ensure we don't free up too much. -mj
- */
- vm_pageout_cluster(m, FALSE);
-
- if (page_prev_state == PAGE_STATE_ANONYMOUS)
- vm_pageout_inactive_anonymous++;
- if (object->internal)
- vm_pageout_inactive_dirty_internal++;
- else
- vm_pageout_inactive_dirty_external++;
+ }
+#if VM_PRESSURE_EVENTS
+#if CONFIG_JETSAM
-done_with_inactivepage:
- inactive_burst_count = 0;
+ /*
+ * If Jetsam is enabled, then the sending
+ * of memory pressure notifications is handled
+ * from the same thread that takes care of high-water
+ * and other jetsams i.e. the memorystatus_thread.
+ */
- if (delayed_unlock++ > delayed_unlock_limit || try_failed == TRUE) {
+#else /* CONFIG_JETSAM */
- if (object != NULL) {
- vm_pageout_scan_wants_object = VM_OBJECT_NULL;
- vm_object_unlock(object);
- object = NULL;
- }
- if (local_freeq) {
- vm_page_unlock_queues();
+ vm_pressure_response();
- VM_DEBUG_EVENT(vm_pageout_freelist, VM_PAGEOUT_FREELIST, DBG_FUNC_START,
- vm_page_free_count, local_freed, delayed_unlock_limit, 4);
-
- vm_page_free_list(local_freeq, TRUE);
-
- VM_DEBUG_EVENT(vm_pageout_freelist, VM_PAGEOUT_FREELIST, DBG_FUNC_END,
- vm_page_free_count, local_freed, 0, 4);
+#endif /* CONFIG_JETSAM */
+#endif /* VM_PRESSURE_EVENTS */
- local_freeq = NULL;
- local_freed = 0;
- vm_page_lock_queues();
- } else
- lck_mtx_yield(&vm_page_queue_lock);
+ if (page_prev_q_state == VM_PAGE_ON_SPECULATIVE_Q) {
+ VM_PAGEOUT_DEBUG(vm_pageout_speculative_dirty, 1);
+ }
- delayed_unlock = 1;
+ if (object->internal) {
+ vm_pageout_vminfo.vm_pageout_inactive_dirty_internal++;
+ } else {
+ vm_pageout_vminfo.vm_pageout_inactive_dirty_external++;
}
- vm_pageout_considered_page++;
- if (COMPRESSED_PAGER_IS_ACTIVE || DEFAULT_FREEZER_COMPRESSED_PAGER_IS_ACTIVE)
- vm_consider_waking_compactor_swapper();
+ /*
+ * internal pages will go to the compressor...
+ * external pages will go to the appropriate pager to be cleaned
+ * and upon completion will end up on 'vm_page_queue_cleaned' which
+ * is a preferred queue to steal from
+ */
+ vm_pageout_cluster(m);
+ inactive_burst_count = 0;
/*
* back to top of pageout scan loop
}
-int vm_page_free_count_init;
-
void
vm_page_free_reserve(
int pages)
{
- int free_after_reserve;
+ int free_after_reserve;
- if (COMPRESSED_PAGER_IS_ACTIVE || DEFAULT_FREEZER_COMPRESSED_PAGER_IS_ACTIVE) {
-
- if ((vm_page_free_reserved + pages + COMPRESSOR_FREE_RESERVED_LIMIT) >= (VM_PAGE_FREE_RESERVED_LIMIT + COMPRESSOR_FREE_RESERVED_LIMIT))
+ if (VM_CONFIG_COMPRESSOR_IS_PRESENT) {
+ if ((vm_page_free_reserved + pages + COMPRESSOR_FREE_RESERVED_LIMIT) >= (VM_PAGE_FREE_RESERVED_LIMIT + COMPRESSOR_FREE_RESERVED_LIMIT)) {
vm_page_free_reserved = VM_PAGE_FREE_RESERVED_LIMIT + COMPRESSOR_FREE_RESERVED_LIMIT;
- else
+ } else {
vm_page_free_reserved += (pages + COMPRESSOR_FREE_RESERVED_LIMIT);
-
+ }
} else {
- if ((vm_page_free_reserved + pages) >= VM_PAGE_FREE_RESERVED_LIMIT)
+ if ((vm_page_free_reserved + pages) >= VM_PAGE_FREE_RESERVED_LIMIT) {
vm_page_free_reserved = VM_PAGE_FREE_RESERVED_LIMIT;
- else
+ } else {
vm_page_free_reserved += pages;
+ }
}
- free_after_reserve = vm_page_free_count_init - vm_page_free_reserved;
+ free_after_reserve = vm_pageout_state.vm_page_free_count_init - vm_page_free_reserved;
vm_page_free_min = vm_page_free_reserved +
- VM_PAGE_FREE_MIN(free_after_reserve);
+ VM_PAGE_FREE_MIN(free_after_reserve);
- if (vm_page_free_min > VM_PAGE_FREE_MIN_LIMIT)
- vm_page_free_min = VM_PAGE_FREE_MIN_LIMIT;
+ if (vm_page_free_min > VM_PAGE_FREE_MIN_LIMIT) {
+ vm_page_free_min = VM_PAGE_FREE_MIN_LIMIT;
+ }
vm_page_free_target = vm_page_free_reserved +
- VM_PAGE_FREE_TARGET(free_after_reserve);
+ VM_PAGE_FREE_TARGET(free_after_reserve);
- if (vm_page_free_target > VM_PAGE_FREE_TARGET_LIMIT)
- vm_page_free_target = VM_PAGE_FREE_TARGET_LIMIT;
+ if (vm_page_free_target > VM_PAGE_FREE_TARGET_LIMIT) {
+ vm_page_free_target = VM_PAGE_FREE_TARGET_LIMIT;
+ }
- if (vm_page_free_target < vm_page_free_min + 5)
+ if (vm_page_free_target < vm_page_free_min + 5) {
vm_page_free_target = vm_page_free_min + 5;
+ }
- vm_page_throttle_limit = vm_page_free_target - (vm_page_free_target / 3);
- vm_page_creation_throttle = vm_page_free_target * 3;
+ vm_page_throttle_limit = vm_page_free_target - (vm_page_free_target / 2);
}
/*
vm_pageout_continue(void)
{
DTRACE_VM2(pgrrun, int, 1, (uint64_t *), NULL);
- vm_pageout_scan_event_counter++;
+ VM_PAGEOUT_DEBUG(vm_pageout_scan_event_counter, 1);
+
+ lck_mtx_lock(&vm_page_queue_free_lock);
+ vm_pageout_running = TRUE;
+ lck_mtx_unlock(&vm_page_queue_free_lock);
vm_pageout_scan();
/*
assert(vm_page_free_wanted_privileged == 0);
assert_wait((event_t) &vm_page_free_wanted, THREAD_UNINT);
+ vm_pageout_running = FALSE;
+#if !CONFIG_EMBEDDED
+ if (vm_pageout_waiter) {
+ vm_pageout_waiter = FALSE;
+ thread_wakeup((event_t)&vm_pageout_waiter);
+ }
+#endif /* !CONFIG_EMBEDDED */
+
lck_mtx_unlock(&vm_page_queue_free_lock);
vm_page_unlock_queues();
/*NOTREACHED*/
}
+#if !CONFIG_EMBEDDED
+kern_return_t
+vm_pageout_wait(uint64_t deadline)
+{
+ kern_return_t kr;
-#ifdef FAKE_DEADLOCK
-
-#define FAKE_COUNT 5000
+ lck_mtx_lock(&vm_page_queue_free_lock);
+ for (kr = KERN_SUCCESS; vm_pageout_running && (KERN_SUCCESS == kr);) {
+ vm_pageout_waiter = TRUE;
+ if (THREAD_AWAKENED != lck_mtx_sleep_deadline(
+ &vm_page_queue_free_lock, LCK_SLEEP_DEFAULT,
+ (event_t) &vm_pageout_waiter, THREAD_UNINT, deadline)) {
+ kr = KERN_OPERATION_TIMED_OUT;
+ }
+ }
+ lck_mtx_unlock(&vm_page_queue_free_lock);
-int internal_count = 0;
-int fake_deadlock = 0;
+ return kr;
+}
+#endif /* !CONFIG_EMBEDDED */
-#endif
static void
-vm_pageout_iothread_continue(struct vm_pageout_queue *q)
+vm_pageout_iothread_external_continue(struct vm_pageout_queue *q)
{
- vm_page_t m = NULL;
- vm_object_t object;
+ vm_page_t m = NULL;
+ vm_object_t object;
vm_object_offset_t offset;
- memory_object_t pager;
- thread_t self = current_thread();
+ memory_object_t pager;
- if ((vm_pageout_internal_iothread != THREAD_NULL)
- && (self == vm_pageout_external_iothread )
- && (self->options & TH_OPT_VMPRIV))
- self->options &= ~TH_OPT_VMPRIV;
+ /* On systems with a compressor, the external IO thread clears its
+ * VM privileged bit to accommodate large allocations (e.g. bulk UPL
+ * creation)
+ */
+ if (vm_pageout_state.vm_pageout_internal_iothread != THREAD_NULL) {
+ current_thread()->options &= ~TH_OPT_VMPRIV;
+ }
vm_page_lockspin_queues();
- while ( !queue_empty(&q->pgo_pending) ) {
-
- q->pgo_busy = TRUE;
- queue_remove_first(&q->pgo_pending, m, vm_page_t, pageq);
- if (m->object->object_slid) {
- panic("slid page %p not allowed on this path\n", m);
- }
- VM_PAGE_CHECK(m);
- m->pageout_queue = FALSE;
- m->pageq.next = NULL;
- m->pageq.prev = NULL;
-
- /*
- * grab a snapshot of the object and offset this
- * page is tabled in so that we can relookup this
- * page after we've taken the object lock - these
- * fields are stable while we hold the page queues lock
- * but as soon as we drop it, there is nothing to keep
- * this page in this object... we hold an activity_in_progress
- * on this object which will keep it from terminating
- */
- object = m->object;
- offset = m->offset;
-
- vm_page_unlock_queues();
-
-#ifdef FAKE_DEADLOCK
- if (q == &vm_pageout_queue_internal) {
- vm_offset_t addr;
- int pg_count;
-
- internal_count++;
-
- if ((internal_count == FAKE_COUNT)) {
-
- pg_count = vm_page_free_count + vm_page_free_reserved;
-
- if (kmem_alloc(kernel_map, &addr, PAGE_SIZE * pg_count) == KERN_SUCCESS) {
- kmem_free(kernel_map, addr, PAGE_SIZE * pg_count);
- }
- internal_count = 0;
- fake_deadlock++;
- }
- }
-#endif
- vm_object_lock(object);
-
- m = vm_page_lookup(object, offset);
-
- if (m == NULL ||
- m->busy || m->cleaning || m->pageout_queue || !m->laundry) {
- /*
- * it's either the same page that someone else has
- * started cleaning (or it's finished cleaning or
- * been put back on the pageout queue), or
- * the page has been freed or we have found a
- * new page at this offset... in all of these cases
- * we merely need to release the activity_in_progress
- * we took when we put the page on the pageout queue
- */
- vm_object_activity_end(object);
- vm_object_unlock(object);
-
- vm_page_lockspin_queues();
- continue;
- }
- if (!object->pager_initialized) {
-
- /*
- * If there is no memory object for the page, create
- * one and hand it to the default pager.
- */
-
- if (!object->pager_initialized)
- vm_object_collapse(object,
- (vm_object_offset_t) 0,
- TRUE);
- if (!object->pager_initialized)
- vm_object_pager_create(object);
- if (!object->pager_initialized) {
- /*
- * Still no pager for the object.
- * Reactivate the page.
- *
- * Should only happen if there is no
- * default pager.
- */
- m->pageout = FALSE;
-
- vm_page_lockspin_queues();
-
- vm_pageout_throttle_up(m);
- vm_page_activate(m);
- vm_pageout_dirty_no_pager++;
-
- vm_page_unlock_queues();
-
- /*
- * And we are done with it.
- */
- vm_object_activity_end(object);
- vm_object_unlock(object);
-
- vm_page_lockspin_queues();
- continue;
- }
- }
- pager = object->pager;
-
- if (pager == MEMORY_OBJECT_NULL) {
- /*
- * This pager has been destroyed by either
- * memory_object_destroy or vm_object_destroy, and
- * so there is nowhere for the page to go.
- */
- if (m->pageout) {
- /*
- * Just free the page... VM_PAGE_FREE takes
- * care of cleaning up all the state...
- * including doing the vm_pageout_throttle_up
- */
- VM_PAGE_FREE(m);
- } else {
- vm_page_lockspin_queues();
-
- vm_pageout_throttle_up(m);
- vm_page_activate(m);
-
- vm_page_unlock_queues();
-
- /*
- * And we are done with it.
- */
- }
- vm_object_activity_end(object);
- vm_object_unlock(object);
-
- vm_page_lockspin_queues();
- continue;
- }
-#if 0
- /*
- * we don't hold the page queue lock
- * so this check isn't safe to make
- */
- VM_PAGE_CHECK(m);
-#endif
- /*
- * give back the activity_in_progress reference we
- * took when we queued up this page and replace it
- * it with a paging_in_progress reference that will
- * also hold the paging offset from changing and
- * prevent the object from terminating
- */
- vm_object_activity_end(object);
- vm_object_paging_begin(object);
- vm_object_unlock(object);
-
- /*
- * Send the data to the pager.
- * any pageout clustering happens there
- */
- memory_object_data_return(pager,
- m->offset + object->paging_offset,
- PAGE_SIZE,
- NULL,
- NULL,
- FALSE,
- FALSE,
- 0);
-
- vm_object_lock(object);
- vm_object_paging_end(object);
- vm_object_unlock(object);
-
- vm_pageout_io_throttle();
-
- vm_page_lockspin_queues();
- }
- q->pgo_busy = FALSE;
- q->pgo_idle = TRUE;
+ while (!vm_page_queue_empty(&q->pgo_pending)) {
+ q->pgo_busy = TRUE;
+ vm_page_queue_remove_first(&q->pgo_pending, m, vmp_pageq);
- assert_wait((event_t) &q->pgo_pending, THREAD_UNINT);
- vm_page_unlock_queues();
+ assert(m->vmp_q_state == VM_PAGE_ON_PAGEOUT_Q);
+ VM_PAGE_CHECK(m);
+ /*
+ * grab a snapshot of the object and offset this
+ * page is tabled in so that we can relookup this
+ * page after we've taken the object lock - these
+ * fields are stable while we hold the page queues lock
+ * but as soon as we drop it, there is nothing to keep
+ * this page in this object... we hold an activity_in_progress
+ * on this object which will keep it from terminating
+ */
+ object = VM_PAGE_OBJECT(m);
+ offset = m->vmp_offset;
- thread_block_parameter((thread_continue_t)vm_pageout_iothread_continue, (void *) q);
- /*NOTREACHED*/
-}
+ m->vmp_q_state = VM_PAGE_NOT_ON_Q;
+ VM_PAGE_ZERO_PAGEQ_ENTRY(m);
+ vm_page_unlock_queues();
-static void
-vm_pageout_iothread_external_continue(struct vm_pageout_queue *q)
-{
- vm_page_t m = NULL;
- vm_object_t object;
- vm_object_offset_t offset;
- memory_object_t pager;
+ vm_object_lock(object);
+ m = vm_page_lookup(object, offset);
- if (vm_pageout_internal_iothread != THREAD_NULL)
- current_thread()->options &= ~TH_OPT_VMPRIV;
+ if (m == NULL || m->vmp_busy || m->vmp_cleaning ||
+ !m->vmp_laundry || (m->vmp_q_state != VM_PAGE_NOT_ON_Q)) {
+ /*
+ * it's either the same page that someone else has
+ * started cleaning (or it's finished cleaning or
+ * been put back on the pageout queue), or
+ * the page has been freed or we have found a
+ * new page at this offset... in all of these cases
+ * we merely need to release the activity_in_progress
+ * we took when we put the page on the pageout queue
+ */
+ vm_object_activity_end(object);
+ vm_object_unlock(object);
- vm_page_lockspin_queues();
+ vm_page_lockspin_queues();
+ continue;
+ }
+ pager = object->pager;
+
+ if (pager == MEMORY_OBJECT_NULL) {
+ /*
+ * This pager has been destroyed by either
+ * memory_object_destroy or vm_object_destroy, and
+ * so there is nowhere for the page to go.
+ */
+ if (m->vmp_free_when_done) {
+ /*
+ * Just free the page... VM_PAGE_FREE takes
+ * care of cleaning up all the state...
+ * including doing the vm_pageout_throttle_up
+ */
+ VM_PAGE_FREE(m);
+ } else {
+ vm_page_lockspin_queues();
+
+ vm_pageout_throttle_up(m);
+ vm_page_activate(m);
- while ( !queue_empty(&q->pgo_pending) ) {
-
- q->pgo_busy = TRUE;
- queue_remove_first(&q->pgo_pending, m, vm_page_t, pageq);
- if (m->object->object_slid) {
- panic("slid page %p not allowed on this path\n", m);
- }
- VM_PAGE_CHECK(m);
- m->pageout_queue = FALSE;
- m->pageq.next = NULL;
- m->pageq.prev = NULL;
-
- /*
- * grab a snapshot of the object and offset this
- * page is tabled in so that we can relookup this
- * page after we've taken the object lock - these
- * fields are stable while we hold the page queues lock
- * but as soon as we drop it, there is nothing to keep
- * this page in this object... we hold an activity_in_progress
- * on this object which will keep it from terminating
- */
- object = m->object;
- offset = m->offset;
-
- vm_page_unlock_queues();
-
- vm_object_lock(object);
-
- m = vm_page_lookup(object, offset);
-
- if (m == NULL ||
- m->busy || m->cleaning || m->pageout_queue || !m->laundry) {
- /*
- * it's either the same page that someone else has
- * started cleaning (or it's finished cleaning or
- * been put back on the pageout queue), or
- * the page has been freed or we have found a
- * new page at this offset... in all of these cases
- * we merely need to release the activity_in_progress
- * we took when we put the page on the pageout queue
- */
- vm_object_activity_end(object);
- vm_object_unlock(object);
-
- vm_page_lockspin_queues();
- continue;
- }
- pager = object->pager;
-
- if (pager == MEMORY_OBJECT_NULL) {
- /*
- * This pager has been destroyed by either
- * memory_object_destroy or vm_object_destroy, and
- * so there is nowhere for the page to go.
- */
- if (m->pageout) {
- /*
- * Just free the page... VM_PAGE_FREE takes
- * care of cleaning up all the state...
- * including doing the vm_pageout_throttle_up
- */
- VM_PAGE_FREE(m);
- } else {
- vm_page_lockspin_queues();
-
- vm_pageout_throttle_up(m);
- vm_page_activate(m);
-
- vm_page_unlock_queues();
-
- /*
- * And we are done with it.
- */
- }
- vm_object_activity_end(object);
- vm_object_unlock(object);
-
- vm_page_lockspin_queues();
- continue;
- }
+ vm_page_unlock_queues();
+
+ /*
+ * And we are done with it.
+ */
+ }
+ vm_object_activity_end(object);
+ vm_object_unlock(object);
+
+ vm_page_lockspin_queues();
+ continue;
+ }
#if 0
- /*
- * we don't hold the page queue lock
- * so this check isn't safe to make
- */
- VM_PAGE_CHECK(m);
+ /*
+ * we don't hold the page queue lock
+ * so this check isn't safe to make
+ */
+ VM_PAGE_CHECK(m);
#endif
- /*
- * give back the activity_in_progress reference we
- * took when we queued up this page and replace it
- * it with a paging_in_progress reference that will
- * also hold the paging offset from changing and
- * prevent the object from terminating
- */
- vm_object_activity_end(object);
- vm_object_paging_begin(object);
- vm_object_unlock(object);
-
- /*
- * Send the data to the pager.
- * any pageout clustering happens there
- */
- memory_object_data_return(pager,
- m->offset + object->paging_offset,
- PAGE_SIZE,
- NULL,
- NULL,
- FALSE,
- FALSE,
- 0);
-
- vm_object_lock(object);
- vm_object_paging_end(object);
- vm_object_unlock(object);
-
- vm_pageout_io_throttle();
-
- vm_page_lockspin_queues();
+ /*
+ * give back the activity_in_progress reference we
+ * took when we queued up this page and replace it
+ * it with a paging_in_progress reference that will
+ * also hold the paging offset from changing and
+ * prevent the object from terminating
+ */
+ vm_object_activity_end(object);
+ vm_object_paging_begin(object);
+ vm_object_unlock(object);
+
+ /*
+ * Send the data to the pager.
+ * any pageout clustering happens there
+ */
+ memory_object_data_return(pager,
+ m->vmp_offset + object->paging_offset,
+ PAGE_SIZE,
+ NULL,
+ NULL,
+ FALSE,
+ FALSE,
+ 0);
+
+ vm_object_lock(object);
+ vm_object_paging_end(object);
+ vm_object_unlock(object);
+
+ vm_pageout_io_throttle();
+
+ vm_page_lockspin_queues();
}
q->pgo_busy = FALSE;
q->pgo_idle = TRUE;
}
-uint32_t vm_compressor_failed;
+#define MAX_FREE_BATCH 32
+uint32_t vm_compressor_time_thread; /* Set via sysctl to record time accrued by
+ * this thread.
+ */
-static void
+
+void
+vm_pageout_iothread_internal_continue(struct cq *);
+void
vm_pageout_iothread_internal_continue(struct cq *cq)
{
struct vm_pageout_queue *q;
- vm_page_t m = NULL;
- vm_object_t object;
- memory_object_t pager;
- boolean_t pgo_draining;
+ vm_page_t m = NULL;
+ boolean_t pgo_draining;
vm_page_t local_q;
- int local_cnt;
+ int local_cnt;
vm_page_t local_freeq = NULL;
int local_freed = 0;
- int local_batch_size;
- kern_return_t retval;
-
-
+ int local_batch_size;
+#if DEVELOPMENT || DEBUG
+ int ncomps = 0;
+ boolean_t marked_active = FALSE;
+#endif
KERNEL_DEBUG(0xe040000c | DBG_FUNC_END, 0, 0, 0, 0, 0);
q = cq->q;
- local_batch_size = q->pgo_maxlaundry / (vm_compressor_thread_count * 4);
+#if __AMP__
+ if (vm_compressor_ebound && (vm_pageout_state.vm_compressor_thread_count > 1)) {
+ local_batch_size = (q->pgo_maxlaundry >> 3);
+ local_batch_size = MAX(local_batch_size, 16);
+ } else {
+ local_batch_size = q->pgo_maxlaundry / (vm_pageout_state.vm_compressor_thread_count * 2);
+ }
+#else
+ local_batch_size = q->pgo_maxlaundry / (vm_pageout_state.vm_compressor_thread_count * 2);
+#endif
+#if RECORD_THE_COMPRESSED_DATA
+ if (q->pgo_laundry) {
+ c_compressed_record_init();
+ }
+#endif
while (TRUE) {
+ int pages_left_on_q = 0;
local_cnt = 0;
local_q = NULL;
KERNEL_DEBUG(0xe0400014 | DBG_FUNC_START, 0, 0, 0, 0, 0);
-
- vm_page_lock_queues();
+ vm_page_lock_queues();
+#if DEVELOPMENT || DEBUG
+ if (marked_active == FALSE) {
+ vmct_active++;
+ vmct_state[cq->id] = VMCT_ACTIVE;
+ marked_active = TRUE;
+ if (vmct_active == 1) {
+ vm_compressor_epoch_start = mach_absolute_time();
+ }
+ }
+#endif
KERNEL_DEBUG(0xe0400014 | DBG_FUNC_END, 0, 0, 0, 0, 0);
- KERNEL_DEBUG(0xe0400018 | DBG_FUNC_START, 0, 0, 0, 0, 0);
-
- while ( !queue_empty(&q->pgo_pending) && local_cnt < local_batch_size) {
-
- queue_remove_first(&q->pgo_pending, m, vm_page_t, pageq);
+ KERNEL_DEBUG(0xe0400018 | DBG_FUNC_START, q->pgo_laundry, 0, 0, 0, 0);
+ while (!vm_page_queue_empty(&q->pgo_pending) && local_cnt < local_batch_size) {
+ vm_page_queue_remove_first(&q->pgo_pending, m, vmp_pageq);
+ assert(m->vmp_q_state == VM_PAGE_ON_PAGEOUT_Q);
VM_PAGE_CHECK(m);
- m->pageout_queue = FALSE;
- m->pageq.prev = NULL;
+ m->vmp_q_state = VM_PAGE_NOT_ON_Q;
+ VM_PAGE_ZERO_PAGEQ_ENTRY(m);
+ m->vmp_laundry = FALSE;
- m->pageq.next = (queue_entry_t)local_q;
+ m->vmp_snext = local_q;
local_q = m;
local_cnt++;
}
- if (local_q == NULL)
+ if (local_q == NULL) {
break;
+ }
q->pgo_busy = TRUE;
- if ((pgo_draining = q->pgo_draining) == FALSE)
+ if ((pgo_draining = q->pgo_draining) == FALSE) {
vm_pageout_throttle_up_batch(q, local_cnt);
+ pages_left_on_q = q->pgo_laundry;
+ } else {
+ pages_left_on_q = q->pgo_laundry - local_cnt;
+ }
vm_page_unlock_queues();
- KERNEL_DEBUG(0xe0400018 | DBG_FUNC_END, 0, 0, 0, 0, 0);
+#if !RECORD_THE_COMPRESSED_DATA
+ if (pages_left_on_q >= local_batch_size && cq->id < (vm_pageout_state.vm_compressor_thread_count - 1)) {
+ thread_wakeup((event_t) ((uintptr_t)&q->pgo_pending + cq->id + 1));
+ }
+#endif
+ KERNEL_DEBUG(0xe0400018 | DBG_FUNC_END, q->pgo_laundry, 0, 0, 0, 0);
while (local_q) {
-
- m = local_q;
- local_q = (vm_page_t)m->pageq.next;
- m->pageq.next = NULL;
-
- if (m->object->object_slid) {
- panic("slid page %p not allowed on this path\n", m);
- }
-
- object = m->object;
- pager = object->pager;
-
- if (!object->pager_initialized || pager == MEMORY_OBJECT_NULL) {
-
- KERNEL_DEBUG(0xe0400010 | DBG_FUNC_START, object, pager, 0, 0, 0);
-
- vm_object_lock(object);
-
- /*
- * If there is no memory object for the page, create
- * one and hand it to the compression pager.
- */
-
- if (!object->pager_initialized)
- vm_object_collapse(object, (vm_object_offset_t) 0, TRUE);
- if (!object->pager_initialized)
- vm_object_compressor_pager_create(object);
-
- if (!object->pager_initialized) {
- /*
- * Still no pager for the object.
- * Reactivate the page.
- *
- * Should only happen if there is no
- * compression pager
- */
- m->pageout = FALSE;
- m->laundry = FALSE;
- PAGE_WAKEUP_DONE(m);
+ KERNEL_DEBUG(0xe0400024 | DBG_FUNC_START, local_cnt, 0, 0, 0, 0);
- vm_page_lockspin_queues();
- vm_page_activate(m);
- vm_pageout_dirty_no_pager++;
- vm_page_unlock_queues();
-
- /*
- * And we are done with it.
- */
- vm_object_activity_end(object);
- vm_object_unlock(object);
+ m = local_q;
+ local_q = m->vmp_snext;
+ m->vmp_snext = NULL;
- continue;
- }
- pager = object->pager;
+ if (vm_pageout_compress_page(&cq->current_chead, cq->scratch_buf, m) == KERN_SUCCESS) {
+#if DEVELOPMENT || DEBUG
+ ncomps++;
+#endif
+ KERNEL_DEBUG(0xe0400024 | DBG_FUNC_END, local_cnt, 0, 0, 0, 0);
- if (pager == MEMORY_OBJECT_NULL) {
- /*
- * This pager has been destroyed by either
- * memory_object_destroy or vm_object_destroy, and
- * so there is nowhere for the page to go.
- */
- if (m->pageout) {
- /*
- * Just free the page... VM_PAGE_FREE takes
- * care of cleaning up all the state...
- * including doing the vm_pageout_throttle_up
- */
- VM_PAGE_FREE(m);
- } else {
- m->laundry = FALSE;
- PAGE_WAKEUP_DONE(m);
+ m->vmp_snext = local_freeq;
+ local_freeq = m;
+ local_freed++;
- vm_page_lockspin_queues();
- vm_page_activate(m);
- vm_page_unlock_queues();
+ if (local_freed >= MAX_FREE_BATCH) {
+ OSAddAtomic64(local_freed, &vm_pageout_vminfo.vm_pageout_compressions);
- /*
- * And we are done with it.
- */
- }
- vm_object_activity_end(object);
- vm_object_unlock(object);
+ vm_page_free_list(local_freeq, TRUE);
- continue;
+ local_freeq = NULL;
+ local_freed = 0;
}
- vm_object_unlock(object);
-
- KERNEL_DEBUG(0xe0400010 | DBG_FUNC_END, object, pager, 0, 0, 0);
}
- while (vm_page_free_count < (vm_page_free_reserved - COMPRESSOR_FREE_RESERVED_LIMIT)) {
- kern_return_t wait_result;
- int need_wakeup = 0;
+#if !CONFIG_JETSAM
+ while (vm_page_free_count < COMPRESSOR_FREE_RESERVED_LIMIT) {
+ kern_return_t wait_result;
+ int need_wakeup = 0;
if (local_freeq) {
- vm_page_free_list(local_freeq, TRUE);
+ OSAddAtomic64(local_freed, &vm_pageout_vminfo.vm_pageout_compressions);
+ vm_page_free_list(local_freeq, TRUE);
local_freeq = NULL;
local_freed = 0;
}
lck_mtx_lock_spin(&vm_page_queue_free_lock);
- if (vm_page_free_count < (vm_page_free_reserved - COMPRESSOR_FREE_RESERVED_LIMIT)) {
-
- if (vm_page_free_wanted_privileged++ == 0)
+ if (vm_page_free_count < COMPRESSOR_FREE_RESERVED_LIMIT) {
+ if (vm_page_free_wanted_privileged++ == 0) {
need_wakeup = 1;
+ }
wait_result = assert_wait((event_t)&vm_page_free_wanted_privileged, THREAD_UNINT);
lck_mtx_unlock(&vm_page_queue_free_lock);
- if (need_wakeup)
+ if (need_wakeup) {
thread_wakeup((event_t)&vm_page_free_wanted);
+ }
- if (wait_result == THREAD_WAITING)
+ if (wait_result == THREAD_WAITING) {
thread_block(THREAD_CONTINUE_NULL);
- } else
+ }
+ } else {
lck_mtx_unlock(&vm_page_queue_free_lock);
+ }
}
- retval = vm_compressor_pager_put(pager, m->offset + object->paging_offset, m->phys_page, &cq->current_chead, cq->scratch_buf);
-
- vm_object_lock(object);
- m->laundry = FALSE;
- m->pageout = FALSE;
-
- if (retval == KERN_SUCCESS) {
-
- vm_page_compressions_failing = FALSE;
-
- VM_STAT_INCR(compressions);
-
- if (m->tabled)
- vm_page_remove(m, TRUE);
- vm_object_activity_end(object);
- vm_object_unlock(object);
-
- m->pageq.next = (queue_entry_t)local_freeq;
- local_freeq = m;
- local_freed++;
-
- } else {
- PAGE_WAKEUP_DONE(m);
-
- vm_page_lockspin_queues();
-
- vm_page_activate(m);
- vm_compressor_failed++;
-
- vm_page_compressions_failing = TRUE;
-
- vm_page_unlock_queues();
-
- vm_object_activity_end(object);
- vm_object_unlock(object);
- }
+#endif
}
if (local_freeq) {
+ OSAddAtomic64(local_freed, &vm_pageout_vminfo.vm_pageout_compressions);
+
vm_page_free_list(local_freeq, TRUE);
-
local_freeq = NULL;
local_freed = 0;
}
q->pgo_busy = FALSE;
q->pgo_idle = TRUE;
- assert_wait((event_t) &q->pgo_pending, THREAD_UNINT);
+ assert_wait((event_t) ((uintptr_t)&q->pgo_pending + cq->id), THREAD_UNINT);
+#if DEVELOPMENT || DEBUG
+ if (marked_active == TRUE) {
+ vmct_active--;
+ vmct_state[cq->id] = VMCT_IDLE;
+
+ if (vmct_active == 0) {
+ vm_compressor_epoch_stop = mach_absolute_time();
+ assertf(vm_compressor_epoch_stop >= vm_compressor_epoch_start,
+ "Compressor epoch non-monotonic: 0x%llx -> 0x%llx",
+ vm_compressor_epoch_start, vm_compressor_epoch_stop);
+ /* This interval includes intervals where one or more
+ * compressor threads were pre-empted
+ */
+ vmct_stats.vmct_cthreads_total += vm_compressor_epoch_stop - vm_compressor_epoch_start;
+ }
+ }
+#endif
vm_page_unlock_queues();
+#if DEVELOPMENT || DEBUG
+ if (__improbable(vm_compressor_time_thread)) {
+ vmct_stats.vmct_runtimes[cq->id] = thread_get_runtime_self();
+ vmct_stats.vmct_pages[cq->id] += ncomps;
+ vmct_stats.vmct_iterations[cq->id]++;
+ if (ncomps > vmct_stats.vmct_maxpages[cq->id]) {
+ vmct_stats.vmct_maxpages[cq->id] = ncomps;
+ }
+ if (ncomps < vmct_stats.vmct_minpages[cq->id]) {
+ vmct_stats.vmct_minpages[cq->id] = ncomps;
+ }
+ }
+#endif
KERNEL_DEBUG(0xe0400018 | DBG_FUNC_END, 0, 0, 0, 0, 0);
}
+kern_return_t
+vm_pageout_compress_page(void **current_chead, char *scratch_buf, vm_page_t m)
+{
+ vm_object_t object;
+ memory_object_t pager;
+ int compressed_count_delta;
+ kern_return_t retval;
+
+ object = VM_PAGE_OBJECT(m);
+
+ assert(!m->vmp_free_when_done);
+ assert(!m->vmp_laundry);
+
+ pager = object->pager;
+
+ if (!object->pager_initialized || pager == MEMORY_OBJECT_NULL) {
+ KERNEL_DEBUG(0xe0400010 | DBG_FUNC_START, object, pager, 0, 0, 0);
+
+ vm_object_lock(object);
+
+ /*
+ * If there is no memory object for the page, create
+ * one and hand it to the compression pager.
+ */
+
+ if (!object->pager_initialized) {
+ vm_object_collapse(object, (vm_object_offset_t) 0, TRUE);
+ }
+ if (!object->pager_initialized) {
+ vm_object_compressor_pager_create(object);
+ }
+
+ pager = object->pager;
+
+ if (!object->pager_initialized || pager == MEMORY_OBJECT_NULL) {
+ /*
+ * Still no pager for the object,
+ * or the pager has been destroyed.
+ * Reactivate the page.
+ *
+ * Should only happen if there is no
+ * compression pager
+ */
+ PAGE_WAKEUP_DONE(m);
+
+ vm_page_lockspin_queues();
+ vm_page_activate(m);
+ VM_PAGEOUT_DEBUG(vm_pageout_dirty_no_pager, 1);
+ vm_page_unlock_queues();
+
+ /*
+ * And we are done with it.
+ */
+ vm_object_activity_end(object);
+ vm_object_unlock(object);
+
+ return KERN_FAILURE;
+ }
+ vm_object_unlock(object);
+
+ KERNEL_DEBUG(0xe0400010 | DBG_FUNC_END, object, pager, 0, 0, 0);
+ }
+ assert(object->pager_initialized && pager != MEMORY_OBJECT_NULL);
+ assert(object->activity_in_progress > 0);
+
+ retval = vm_compressor_pager_put(
+ pager,
+ m->vmp_offset + object->paging_offset,
+ VM_PAGE_GET_PHYS_PAGE(m),
+ current_chead,
+ scratch_buf,
+ &compressed_count_delta);
+
+ vm_object_lock(object);
+
+ assert(object->activity_in_progress > 0);
+ assert(VM_PAGE_OBJECT(m) == object);
+ assert( !VM_PAGE_WIRED(m));
+
+ vm_compressor_pager_count(pager,
+ compressed_count_delta,
+ FALSE, /* shared_lock */
+ object);
+
+ if (retval == KERN_SUCCESS) {
+ /*
+ * If the object is purgeable, its owner's
+ * purgeable ledgers will be updated in
+ * vm_page_remove() but the page still
+ * contributes to the owner's memory footprint,
+ * so account for it as such.
+ */
+ if ((object->purgable != VM_PURGABLE_DENY ||
+ object->vo_ledger_tag) &&
+ object->vo_owner != NULL) {
+ /* one more compressed purgeable/tagged page */
+ vm_object_owner_compressed_update(object,
+ +1);
+ }
+ VM_STAT_INCR(compressions);
+
+ if (m->vmp_tabled) {
+ vm_page_remove(m, TRUE);
+ }
+ } else {
+ PAGE_WAKEUP_DONE(m);
+
+ vm_page_lockspin_queues();
+
+ vm_page_activate(m);
+ vm_pageout_vminfo.vm_compressor_failed++;
+
+ vm_page_unlock_queues();
+ }
+ vm_object_activity_end(object);
+ vm_object_unlock(object);
+
+ return retval;
+}
+
static void
-vm_pageout_adjust_io_throttles(struct vm_pageout_queue *iq, struct vm_pageout_queue *eq, boolean_t req_lowpriority)
+vm_pageout_adjust_eq_iothrottle(struct vm_pageout_queue *eq, boolean_t req_lowpriority)
{
- uint32_t policy;
- boolean_t set_iq = FALSE;
- boolean_t set_eq = FALSE;
-
- if (hibernate_cleaning_in_progress == TRUE)
- req_lowpriority = FALSE;
-
- if ((DEFAULT_PAGER_IS_ACTIVE || DEFAULT_FREEZER_IS_ACTIVE) && iq->pgo_inited == TRUE && iq->pgo_lowpriority != req_lowpriority)
- set_iq = TRUE;
+ uint32_t policy;
- if (eq->pgo_inited == TRUE && eq->pgo_lowpriority != req_lowpriority)
- set_eq = TRUE;
-
- if (set_iq == TRUE || set_eq == TRUE) {
+ if (hibernate_cleaning_in_progress == TRUE) {
+ req_lowpriority = FALSE;
+ }
+ if (eq->pgo_inited == TRUE && eq->pgo_lowpriority != req_lowpriority) {
vm_page_unlock_queues();
if (req_lowpriority == TRUE) {
policy = THROTTLE_LEVEL_PAGEOUT_UNTHROTTLED;
DTRACE_VM(laundryunthrottle);
}
- if (set_iq == TRUE) {
- proc_set_task_policy_thread(kernel_task, iq->pgo_tid, TASK_POLICY_EXTERNAL, TASK_POLICY_IO, policy);
+ proc_set_thread_policy_with_tid(kernel_task, eq->pgo_tid,
+ TASK_POLICY_EXTERNAL, TASK_POLICY_IO, policy);
- iq->pgo_lowpriority = req_lowpriority;
- }
- if (set_eq == TRUE) {
- proc_set_task_policy_thread(kernel_task, eq->pgo_tid, TASK_POLICY_EXTERNAL, TASK_POLICY_IO, policy);
-
- eq->pgo_lowpriority = req_lowpriority;
- }
vm_page_lock_queues();
+ eq->pgo_lowpriority = req_lowpriority;
}
}
static void
vm_pageout_iothread_external(void)
{
- thread_t self = current_thread();
+ thread_t self = current_thread();
self->options |= TH_OPT_VMPRIV;
- DTRACE_VM2(laundrythrottle, int, 1, (uint64_t *), NULL);
+ DTRACE_VM2(laundrythrottle, int, 1, (uint64_t *), NULL);
- proc_set_task_policy_thread(kernel_task, self->thread_id, TASK_POLICY_EXTERNAL,
- TASK_POLICY_IO, THROTTLE_LEVEL_PAGEOUT_THROTTLED);
+ proc_set_thread_policy(self, TASK_POLICY_EXTERNAL,
+ TASK_POLICY_IO, THROTTLE_LEVEL_PAGEOUT_THROTTLED);
vm_page_lock_queues();
vm_page_unlock_queues();
- if (COMPRESSED_PAGER_IS_ACTIVE || DEFAULT_FREEZER_COMPRESSED_PAGER_IS_ACTIVE)
- vm_pageout_iothread_external_continue(&vm_pageout_queue_external);
- else
- vm_pageout_iothread_continue(&vm_pageout_queue_external);
+ vm_pageout_iothread_external_continue(&vm_pageout_queue_external);
/*NOTREACHED*/
}
static void
vm_pageout_iothread_internal(struct cq *cq)
{
- thread_t self = current_thread();
+ thread_t self = current_thread();
self->options |= TH_OPT_VMPRIV;
- if (DEFAULT_PAGER_IS_ACTIVE || DEFAULT_FREEZER_IS_ACTIVE) {
- DTRACE_VM2(laundrythrottle, int, 1, (uint64_t *), NULL);
-
- proc_set_task_policy_thread(kernel_task, self->thread_id, TASK_POLICY_EXTERNAL,
- TASK_POLICY_IO, THROTTLE_LEVEL_PAGEOUT_THROTTLED);
- }
vm_page_lock_queues();
vm_pageout_queue_internal.pgo_tid = self->thread_id;
vm_page_unlock_queues();
- if (COMPRESSED_PAGER_IS_ACTIVE || DEFAULT_FREEZER_COMPRESSED_PAGER_IS_ACTIVE) {
- cq->q = &vm_pageout_queue_internal;
- cq->current_chead = NULL;
- cq->scratch_buf = kalloc(COMPRESSOR_SCRATCH_BUF_SIZE);
+ if (vm_pageout_state.vm_restricted_to_single_processor == TRUE) {
+ thread_vm_bind_group_add();
+ }
+
+#if CONFIG_THREAD_GROUPS
+ thread_group_vm_add();
+#endif /* CONFIG_THREAD_GROUPS */
+
+#if __AMP__
+ if (vm_compressor_ebound) {
+ /*
+ * Use the soft bound option for vm_compressor to allow it to run on
+ * P-cores if E-cluster is unavailable.
+ */
+ thread_bind_cluster_type(self, 'E', true);
+ }
+#endif /* __AMP__ */
- vm_pageout_iothread_internal_continue(cq);
- } else
- vm_pageout_iothread_continue(&vm_pageout_queue_internal);
+ thread_set_thread_name(current_thread(), "VM_compressor");
+#if DEVELOPMENT || DEBUG
+ vmct_stats.vmct_minpages[cq->id] = INT32_MAX;
+#endif
+ vm_pageout_iothread_internal_continue(cq);
/*NOTREACHED*/
}
kern_return_t
-vm_set_buffer_cleanup_callout(boolean_t (*func)(int))
+vm_set_buffer_cleanup_callout(boolean_t (*func)(int))
{
- if (OSCompareAndSwapPtr(NULL, func, (void * volatile *) &consider_buffer_cache_collect)) {
+ if (OSCompareAndSwapPtr(NULL, ptrauth_nop_cast(void *, func), (void * volatile *) &consider_buffer_cache_collect)) {
return KERN_SUCCESS;
} else {
return KERN_FAILURE; /* Already set */
}
}
-
-extern boolean_t memorystatus_manual_testing_on;
-extern unsigned int memorystatus_level;
-
+extern boolean_t memorystatus_manual_testing_on;
+extern unsigned int memorystatus_level;
#if VM_PRESSURE_EVENTS
+boolean_t vm_pressure_events_enabled = FALSE;
+
void
vm_pressure_response(void)
{
+ vm_pressure_level_t old_level = kVMPressureNormal;
+ int new_level = -1;
+ unsigned int total_pages;
+ uint64_t available_memory = 0;
+
+ if (vm_pressure_events_enabled == FALSE) {
+ return;
+ }
+
+#if CONFIG_EMBEDDED
+ available_memory = (uint64_t) memorystatus_available_pages;
- vm_pressure_level_t old_level = kVMPressureNormal;
- int new_level = -1;
+#else /* CONFIG_EMBEDDED */
- uint64_t available_memory = (((uint64_t) AVAILABLE_NON_COMPRESSED_MEMORY) * 100);
+ available_memory = (uint64_t) AVAILABLE_NON_COMPRESSED_MEMORY;
+ memorystatus_available_pages = (uint64_t) AVAILABLE_NON_COMPRESSED_MEMORY;
- memorystatus_level = (unsigned int) (available_memory / atop_64(max_mem));
+#endif /* CONFIG_EMBEDDED */
+
+ total_pages = (unsigned int) atop_64(max_mem);
+#if CONFIG_SECLUDED_MEMORY
+ total_pages -= vm_page_secluded_count;
+#endif /* CONFIG_SECLUDED_MEMORY */
+ memorystatus_level = (unsigned int) ((available_memory * 100) / total_pages);
if (memorystatus_manual_testing_on) {
return;
}
-
+
old_level = memorystatus_vm_pressure_level;
switch (memorystatus_vm_pressure_level) {
-
- case kVMPressureNormal:
- {
- if (VM_PRESSURE_WARNING_TO_CRITICAL()) {
- new_level = kVMPressureCritical;
- } else if (VM_PRESSURE_NORMAL_TO_WARNING()) {
- new_level = kVMPressureWarning;
- }
- break;
+ case kVMPressureNormal:
+ {
+ if (VM_PRESSURE_WARNING_TO_CRITICAL()) {
+ new_level = kVMPressureCritical;
+ } else if (VM_PRESSURE_NORMAL_TO_WARNING()) {
+ new_level = kVMPressureWarning;
}
+ break;
+ }
- case kVMPressureWarning:
- case kVMPressureUrgent:
- {
- if (VM_PRESSURE_WARNING_TO_NORMAL()) {
- new_level = kVMPressureNormal;
- } else if (VM_PRESSURE_WARNING_TO_CRITICAL()) {
- new_level = kVMPressureCritical;
- }
- break;
+ case kVMPressureWarning:
+ case kVMPressureUrgent:
+ {
+ if (VM_PRESSURE_WARNING_TO_NORMAL()) {
+ new_level = kVMPressureNormal;
+ } else if (VM_PRESSURE_WARNING_TO_CRITICAL()) {
+ new_level = kVMPressureCritical;
}
+ break;
+ }
- case kVMPressureCritical:
- {
- if (VM_PRESSURE_WARNING_TO_NORMAL()) {
- new_level = kVMPressureNormal;
- } else if (VM_PRESSURE_CRITICAL_TO_WARNING()) {
- new_level = kVMPressureWarning;
- }
- break;
+ case kVMPressureCritical:
+ {
+ if (VM_PRESSURE_WARNING_TO_NORMAL()) {
+ new_level = kVMPressureNormal;
+ } else if (VM_PRESSURE_CRITICAL_TO_WARNING()) {
+ new_level = kVMPressureWarning;
}
+ break;
+ }
- default:
- return;
+ default:
+ return;
}
-
+
if (new_level != -1) {
memorystatus_vm_pressure_level = (vm_pressure_level_t) new_level;
- if (old_level != new_level) {
- if (vm_pressure_thread_running == FALSE) {
+ if (new_level != (int) old_level) {
+ VM_DEBUG_CONSTANT_EVENT(vm_pressure_level_change, VM_PRESSURE_LEVEL_CHANGE, DBG_FUNC_NONE,
+ new_level, old_level, 0, 0);
+ }
+
+ if ((memorystatus_vm_pressure_level != kVMPressureNormal) || (old_level != memorystatus_vm_pressure_level)) {
+ if (vm_pageout_state.vm_pressure_thread_running == FALSE) {
thread_wakeup(&vm_pressure_thread);
}
- thread_wakeup(&vm_pressure_changed);
+
+ if (old_level != memorystatus_vm_pressure_level) {
+ thread_wakeup(&vm_pageout_state.vm_pressure_changed);
+ }
}
}
-
}
#endif /* VM_PRESSURE_EVENTS */
+/*
+ * Function called by a kernel thread to either get the current pressure level or
+ * wait until memory pressure changes from a given level.
+ */
kern_return_t
-mach_vm_pressure_level_monitor(__unused boolean_t wait_for_pressure, __unused unsigned int *pressure_level) {
-
-#if !VM_PRESSURE_EVENTS
+mach_vm_pressure_level_monitor(__unused boolean_t wait_for_pressure, __unused unsigned int *pressure_level)
+{
+#if !VM_PRESSURE_EVENTS
return KERN_FAILURE;
#else /* VM_PRESSURE_EVENTS */
- kern_return_t kr = KERN_SUCCESS;
+ wait_result_t wr = 0;
+ vm_pressure_level_t old_level = memorystatus_vm_pressure_level;
- if (pressure_level != NULL) {
+ if (pressure_level == NULL) {
+ return KERN_INVALID_ARGUMENT;
+ }
- vm_pressure_level_t old_level = memorystatus_vm_pressure_level;
+ if (*pressure_level == kVMPressureJetsam) {
+ if (!wait_for_pressure) {
+ return KERN_INVALID_ARGUMENT;
+ }
- if (wait_for_pressure == TRUE) {
- wait_result_t wr = 0;
+ lck_mtx_lock(&memorystatus_jetsam_fg_band_lock);
+ wr = assert_wait((event_t)&memorystatus_jetsam_fg_band_waiters,
+ THREAD_INTERRUPTIBLE);
+ if (wr == THREAD_WAITING) {
+ ++memorystatus_jetsam_fg_band_waiters;
+ lck_mtx_unlock(&memorystatus_jetsam_fg_band_lock);
+ wr = thread_block(THREAD_CONTINUE_NULL);
+ } else {
+ lck_mtx_unlock(&memorystatus_jetsam_fg_band_lock);
+ }
+ if (wr != THREAD_AWAKENED) {
+ return KERN_ABORTED;
+ }
+ *pressure_level = kVMPressureJetsam;
+ return KERN_SUCCESS;
+ }
- while (old_level == *pressure_level) {
- wr = assert_wait((event_t) &vm_pressure_changed,
- THREAD_INTERRUPTIBLE);
- if (wr == THREAD_WAITING) {
- wr = thread_block(THREAD_CONTINUE_NULL);
- }
- if (wr == THREAD_INTERRUPTED) {
- return KERN_ABORTED;
- }
- if (wr == THREAD_AWAKENED) {
-
- old_level = memorystatus_vm_pressure_level;
+ if (wait_for_pressure == TRUE) {
+ while (old_level == *pressure_level) {
+ wr = assert_wait((event_t) &vm_pageout_state.vm_pressure_changed,
+ THREAD_INTERRUPTIBLE);
+ if (wr == THREAD_WAITING) {
+ wr = thread_block(THREAD_CONTINUE_NULL);
+ }
+ if (wr == THREAD_INTERRUPTED) {
+ return KERN_ABORTED;
+ }
- if (old_level != *pressure_level) {
- break;
- }
- }
+ if (wr == THREAD_AWAKENED) {
+ old_level = memorystatus_vm_pressure_level;
}
}
-
- *pressure_level = old_level;
- kr = KERN_SUCCESS;
- } else {
- kr = KERN_INVALID_ARGUMENT;
}
- return kr;
+ *pressure_level = old_level;
+ return KERN_SUCCESS;
#endif /* VM_PRESSURE_EVENTS */
}
#if VM_PRESSURE_EVENTS
void
-vm_pressure_thread(void) {
- static boolean_t set_up_thread = FALSE;
+vm_pressure_thread(void)
+{
+ static boolean_t thread_initialized = FALSE;
- if (set_up_thread) {
- vm_pressure_thread_running = TRUE;
+ if (thread_initialized == TRUE) {
+ vm_pageout_state.vm_pressure_thread_running = TRUE;
consider_vm_pressure_events();
- vm_pressure_thread_running = FALSE;
+ vm_pageout_state.vm_pressure_thread_running = FALSE;
}
- set_up_thread = TRUE;
+ thread_set_thread_name(current_thread(), "VM_pressure");
+ thread_initialized = TRUE;
assert_wait((event_t) &vm_pressure_thread, THREAD_UNINT);
thread_block((thread_continue_t)vm_pressure_thread);
}
#endif /* VM_PRESSURE_EVENTS */
-uint32_t vm_pageout_considered_page_last = 0;
-
/*
* called once per-second via "compute_averages"
*/
void
-compute_pageout_gc_throttle()
+compute_pageout_gc_throttle(__unused void *arg)
{
- if (vm_pageout_considered_page != vm_pageout_considered_page_last) {
-
- vm_pageout_considered_page_last = vm_pageout_considered_page;
+ if (vm_pageout_vminfo.vm_pageout_considered_page != vm_pageout_state.vm_pageout_considered_page_last) {
+ vm_pageout_state.vm_pageout_considered_page_last = vm_pageout_vminfo.vm_pageout_considered_page;
thread_wakeup((event_t) &vm_pageout_garbage_collect);
}
}
+/*
+ * vm_pageout_garbage_collect can also be called when the zone allocator needs
+ * to call zone_gc on a different thread in order to trigger zone-map-exhaustion
+ * jetsams. We need to check if the zone map size is above its jetsam limit to
+ * decide if this was indeed the case.
+ *
+ * We need to do this on a different thread because of the following reasons:
+ *
+ * 1. In the case of synchronous jetsams, the leaking process can try to jetsam
+ * itself causing the system to hang. We perform synchronous jetsams if we're
+ * leaking in the VM map entries zone, so the leaking process could be doing a
+ * zalloc for a VM map entry while holding its vm_map lock, when it decides to
+ * jetsam itself. We also need the vm_map lock on the process termination path,
+ * which would now lead the dying process to deadlock against itself.
+ *
+ * 2. The jetsam path might need to allocate zone memory itself. We could try
+ * using the non-blocking variant of zalloc for this path, but we can still
+ * end up trying to do a kernel_memory_allocate when the zone maps are almost
+ * full.
+ */
-static void
+void
vm_pageout_garbage_collect(int collect)
{
-
if (collect) {
- boolean_t buf_large_zfree = FALSE;
- boolean_t first_try = TRUE;
-
- stack_collect();
+ if (is_zone_map_nearing_exhaustion()) {
+ /*
+ * Woken up by the zone allocator for zone-map-exhaustion jetsams.
+ *
+ * Bail out after calling zone_gc (which triggers the
+ * zone-map-exhaustion jetsams). If we fall through, the subsequent
+ * operations that clear out a bunch of caches might allocate zone
+ * memory themselves (for eg. vm_map operations would need VM map
+ * entries). Since the zone map is almost full at this point, we
+ * could end up with a panic. We just need to quickly jetsam a
+ * process and exit here.
+ *
+ * It could so happen that we were woken up to relieve memory
+ * pressure and the zone map also happened to be near its limit at
+ * the time, in which case we'll skip out early. But that should be
+ * ok; if memory pressure persists, the thread will simply be woken
+ * up again.
+ */
+ consider_zone_gc(TRUE);
+ } else {
+ /* Woken up by vm_pageout_scan or compute_pageout_gc_throttle. */
+ boolean_t buf_large_zfree = FALSE;
+ boolean_t first_try = TRUE;
- consider_machine_collect();
+ stack_collect();
- do {
- if (consider_buffer_cache_collect != NULL) {
- buf_large_zfree = (*consider_buffer_cache_collect)(0);
- }
- if (first_try == TRUE || buf_large_zfree == TRUE) {
- /*
- * consider_zone_gc should be last, because the other operations
- * might return memory to zones.
- */
- consider_zone_gc(buf_large_zfree);
- }
- first_try = FALSE;
+ consider_machine_collect();
+ mbuf_drain(FALSE);
- } while (buf_large_zfree == TRUE && vm_page_free_count < vm_page_free_target);
+ do {
+ if (consider_buffer_cache_collect != NULL) {
+ buf_large_zfree = (*consider_buffer_cache_collect)(0);
+ }
+ if (first_try == TRUE || buf_large_zfree == TRUE) {
+ /*
+ * consider_zone_gc should be last, because the other operations
+ * might return memory to zones.
+ */
+ consider_zone_gc(FALSE);
+ }
+ first_try = FALSE;
+ } while (buf_large_zfree == TRUE && vm_page_free_count < vm_page_free_target);
- consider_machine_adjust();
+ consider_machine_adjust();
+ }
}
+
assert_wait((event_t) &vm_pageout_garbage_collect, THREAD_UNINT);
thread_block_parameter((thread_continue_t) vm_pageout_garbage_collect, (void *)1);
#endif /* VM_PAGE_FAKE_BUCKETS */
#endif /* VM_PAGE_BUCKETS_CHECK */
+
+
+void
+vm_set_restrictions(unsigned int num_cpus)
+{
+ int vm_restricted_to_single_processor = 0;
+
+ if (PE_parse_boot_argn("vm_restricted_to_single_processor", &vm_restricted_to_single_processor, sizeof(vm_restricted_to_single_processor))) {
+ kprintf("Overriding vm_restricted_to_single_processor to %d\n", vm_restricted_to_single_processor);
+ vm_pageout_state.vm_restricted_to_single_processor = (vm_restricted_to_single_processor ? TRUE : FALSE);
+ } else {
+ assert(num_cpus > 0);
+
+ if (num_cpus <= 3) {
+ /*
+ * on systems with a limited number of CPUS, bind the
+ * 4 major threads that can free memory and that tend to use
+ * a fair bit of CPU under pressured conditions to a single processor.
+ * This insures that these threads don't hog all of the available CPUs
+ * (important for camera launch), while allowing them to run independently
+ * w/r to locks... the 4 threads are
+ * vm_pageout_scan, vm_pageout_iothread_internal (compressor),
+ * vm_compressor_swap_trigger_thread (minor and major compactions),
+ * memorystatus_thread (jetsams).
+ *
+ * the first time the thread is run, it is responsible for checking the
+ * state of vm_restricted_to_single_processor, and if TRUE it calls
+ * thread_bind_master... someday this should be replaced with a group
+ * scheduling mechanism and KPI.
+ */
+ vm_pageout_state.vm_restricted_to_single_processor = TRUE;
+ } else {
+ vm_pageout_state.vm_restricted_to_single_processor = FALSE;
+ }
+ }
+}
+
void
vm_pageout(void)
{
- thread_t self = current_thread();
- thread_t thread;
- kern_return_t result;
- spl_t s;
+ thread_t self = current_thread();
+ thread_t thread;
+ kern_return_t result;
+ spl_t s;
/*
* Set thread privileges.
*/
s = splsched();
+
+ vm_pageout_scan_thread = self;
+
+#if CONFIG_VPS_DYNAMIC_PRIO
+
+ int vps_dynprio_bootarg = 0;
+
+ if (PE_parse_boot_argn("vps_dynamic_priority_enabled", &vps_dynprio_bootarg, sizeof(vps_dynprio_bootarg))) {
+ vps_dynamic_priority_enabled = (vps_dynprio_bootarg ? TRUE : FALSE);
+ kprintf("Overriding vps_dynamic_priority_enabled to %d\n", vps_dynamic_priority_enabled);
+ } else {
+ if (vm_pageout_state.vm_restricted_to_single_processor == TRUE) {
+ vps_dynamic_priority_enabled = TRUE;
+ } else {
+ vps_dynamic_priority_enabled = FALSE;
+ }
+ }
+
+ if (vps_dynamic_priority_enabled) {
+ sched_set_kernel_thread_priority(self, MAXPRI_THROTTLE);
+ thread_set_eager_preempt(self);
+ } else {
+ sched_set_kernel_thread_priority(self, BASEPRI_VM);
+ }
+
+#else /* CONFIG_VPS_DYNAMIC_PRIO */
+
+ vps_dynamic_priority_enabled = FALSE;
+ sched_set_kernel_thread_priority(self, BASEPRI_VM);
+
+#endif /* CONFIG_VPS_DYNAMIC_PRIO */
+
thread_lock(self);
- self->priority = BASEPRI_PREEMPT - 1;
- set_sched_pri(self, self->priority);
+ self->options |= TH_OPT_VMPRIV;
thread_unlock(self);
- if (!self->reserved_stack)
+ if (!self->reserved_stack) {
self->reserved_stack = self->kernel_stack;
+ }
- splx(s);
+ if (vm_pageout_state.vm_restricted_to_single_processor == TRUE &&
+ vps_dynamic_priority_enabled == FALSE) {
+ thread_vm_bind_group_add();
+ }
- /*
- * Initialize some paging parameters.
- */
- if (vm_pageout_swap_wait == 0)
- vm_pageout_swap_wait = VM_PAGEOUT_SWAP_WAIT;
+#if CONFIG_THREAD_GROUPS
+ thread_group_vm_add();
+#endif /* CONFIG_THREAD_GROUPS */
- if (vm_pageout_idle_wait == 0)
- vm_pageout_idle_wait = VM_PAGEOUT_IDLE_WAIT;
+#if __AMP__
+ PE_parse_boot_argn("vmpgo_pcluster", &vm_pgo_pbound, sizeof(vm_pgo_pbound));
+ if (vm_pgo_pbound) {
+ /*
+ * Use the soft bound option for vm pageout to allow it to run on
+ * E-cores if P-cluster is unavailable.
+ */
+ thread_bind_cluster_type(self, 'P', true);
+ }
+#endif /* __AMP__ */
+
+ splx(s);
- if (vm_pageout_burst_wait == 0)
- vm_pageout_burst_wait = VM_PAGEOUT_BURST_WAIT;
+ thread_set_thread_name(current_thread(), "VM_pageout_scan");
- if (vm_pageout_empty_wait == 0)
- vm_pageout_empty_wait = VM_PAGEOUT_EMPTY_WAIT;
+ /*
+ * Initialize some paging parameters.
+ */
- if (vm_pageout_deadlock_wait == 0)
- vm_pageout_deadlock_wait = VM_PAGEOUT_DEADLOCK_WAIT;
+ vm_pageout_state.vm_pressure_thread_running = FALSE;
+ vm_pageout_state.vm_pressure_changed = FALSE;
+ vm_pageout_state.memorystatus_purge_on_warning = 2;
+ vm_pageout_state.memorystatus_purge_on_urgent = 5;
+ vm_pageout_state.memorystatus_purge_on_critical = 8;
+ vm_pageout_state.vm_page_speculative_q_age_ms = VM_PAGE_SPECULATIVE_Q_AGE_MS;
+ vm_pageout_state.vm_page_speculative_percentage = 5;
+ vm_pageout_state.vm_page_speculative_target = 0;
+
+ vm_pageout_state.vm_pageout_external_iothread = THREAD_NULL;
+ vm_pageout_state.vm_pageout_internal_iothread = THREAD_NULL;
+
+ vm_pageout_state.vm_pageout_swap_wait = 0;
+ vm_pageout_state.vm_pageout_idle_wait = 0;
+ vm_pageout_state.vm_pageout_empty_wait = 0;
+ vm_pageout_state.vm_pageout_burst_wait = 0;
+ vm_pageout_state.vm_pageout_deadlock_wait = 0;
+ vm_pageout_state.vm_pageout_deadlock_relief = 0;
+ vm_pageout_state.vm_pageout_burst_inactive_throttle = 0;
+
+ vm_pageout_state.vm_pageout_inactive = 0;
+ vm_pageout_state.vm_pageout_inactive_used = 0;
+ vm_pageout_state.vm_pageout_inactive_clean = 0;
+
+ vm_pageout_state.vm_memory_pressure = 0;
+ vm_pageout_state.vm_page_filecache_min = 0;
+#if CONFIG_JETSAM
+ vm_pageout_state.vm_page_filecache_min_divisor = 70;
+ vm_pageout_state.vm_page_xpmapped_min_divisor = 40;
+#else
+ vm_pageout_state.vm_page_filecache_min_divisor = 27;
+ vm_pageout_state.vm_page_xpmapped_min_divisor = 36;
+#endif
+ vm_pageout_state.vm_page_free_count_init = vm_page_free_count;
- if (vm_pageout_deadlock_relief == 0)
- vm_pageout_deadlock_relief = VM_PAGEOUT_DEADLOCK_RELIEF;
+ vm_pageout_state.vm_pageout_considered_page_last = 0;
- if (vm_pageout_inactive_relief == 0)
- vm_pageout_inactive_relief = VM_PAGEOUT_INACTIVE_RELIEF;
+ if (vm_pageout_state.vm_pageout_swap_wait == 0) {
+ vm_pageout_state.vm_pageout_swap_wait = VM_PAGEOUT_SWAP_WAIT;
+ }
- if (vm_pageout_burst_active_throttle == 0)
- vm_pageout_burst_active_throttle = VM_PAGEOUT_BURST_ACTIVE_THROTTLE;
+ if (vm_pageout_state.vm_pageout_idle_wait == 0) {
+ vm_pageout_state.vm_pageout_idle_wait = VM_PAGEOUT_IDLE_WAIT;
+ }
- if (vm_pageout_burst_inactive_throttle == 0)
- vm_pageout_burst_inactive_throttle = VM_PAGEOUT_BURST_INACTIVE_THROTTLE;
+ if (vm_pageout_state.vm_pageout_burst_wait == 0) {
+ vm_pageout_state.vm_pageout_burst_wait = VM_PAGEOUT_BURST_WAIT;
+ }
-#if !CONFIG_JETSAM
- vm_page_filecache_min = (uint32_t) (max_mem / PAGE_SIZE) / 20;
- if (vm_page_filecache_min < VM_PAGE_FILECACHE_MIN)
- vm_page_filecache_min = VM_PAGE_FILECACHE_MIN;
-#endif
+ if (vm_pageout_state.vm_pageout_empty_wait == 0) {
+ vm_pageout_state.vm_pageout_empty_wait = VM_PAGEOUT_EMPTY_WAIT;
+ }
- /*
- * Set kernel task to low backing store privileged
- * status
- */
- task_lock(kernel_task);
- kernel_task->priv_flags |= VM_BACKING_STORE_PRIV;
- task_unlock(kernel_task);
+ if (vm_pageout_state.vm_pageout_deadlock_wait == 0) {
+ vm_pageout_state.vm_pageout_deadlock_wait = VM_PAGEOUT_DEADLOCK_WAIT;
+ }
- vm_page_free_count_init = vm_page_free_count;
+ if (vm_pageout_state.vm_pageout_deadlock_relief == 0) {
+ vm_pageout_state.vm_pageout_deadlock_relief = VM_PAGEOUT_DEADLOCK_RELIEF;
+ }
+ if (vm_pageout_state.vm_pageout_burst_inactive_throttle == 0) {
+ vm_pageout_state.vm_pageout_burst_inactive_throttle = VM_PAGEOUT_BURST_INACTIVE_THROTTLE;
+ }
/*
* even if we've already called vm_page_free_reserve
* call it again here to insure that the targets are
*/
if (vm_page_free_reserved < VM_PAGE_FREE_RESERVED(processor_count)) {
vm_page_free_reserve((VM_PAGE_FREE_RESERVED(processor_count)) - vm_page_free_reserved);
- } else
+ } else {
vm_page_free_reserve(0);
+ }
- queue_init(&vm_pageout_queue_external.pgo_pending);
+ vm_page_queue_init(&vm_pageout_queue_external.pgo_pending);
vm_pageout_queue_external.pgo_maxlaundry = VM_PAGE_LAUNDRY_MAX;
vm_pageout_queue_external.pgo_laundry = 0;
vm_pageout_queue_external.pgo_idle = FALSE;
vm_pageout_queue_external.pgo_tid = -1;
vm_pageout_queue_external.pgo_inited = FALSE;
-
- queue_init(&vm_pageout_queue_internal.pgo_pending);
+ vm_page_queue_init(&vm_pageout_queue_internal.pgo_pending);
vm_pageout_queue_internal.pgo_maxlaundry = 0;
vm_pageout_queue_internal.pgo_laundry = 0;
vm_pageout_queue_internal.pgo_idle = FALSE;
/* internal pageout thread started when default pager registered first time */
/* external pageout and garbage collection threads started here */
- result = kernel_thread_start_priority((thread_continue_t)vm_pageout_iothread_external, NULL,
- BASEPRI_PREEMPT - 1,
- &vm_pageout_external_iothread);
- if (result != KERN_SUCCESS)
+ result = kernel_thread_start_priority((thread_continue_t)vm_pageout_iothread_external, NULL,
+ BASEPRI_VM,
+ &vm_pageout_state.vm_pageout_external_iothread);
+ if (result != KERN_SUCCESS) {
panic("vm_pageout_iothread_external: create failed");
-
- thread_deallocate(vm_pageout_external_iothread);
+ }
+ thread_set_thread_name(vm_pageout_state.vm_pageout_external_iothread, "VM_pageout_external_iothread");
+ thread_deallocate(vm_pageout_state.vm_pageout_external_iothread);
result = kernel_thread_start_priority((thread_continue_t)vm_pageout_garbage_collect, NULL,
- BASEPRI_DEFAULT,
- &thread);
- if (result != KERN_SUCCESS)
+ BASEPRI_DEFAULT,
+ &thread);
+ if (result != KERN_SUCCESS) {
panic("vm_pageout_garbage_collect: create failed");
-
+ }
+ thread_set_thread_name(thread, "VM_pageout_garbage_collect");
thread_deallocate(thread);
#if VM_PRESSURE_EVENTS
result = kernel_thread_start_priority((thread_continue_t)vm_pressure_thread, NULL,
- BASEPRI_DEFAULT,
- &thread);
+ BASEPRI_DEFAULT,
+ &thread);
- if (result != KERN_SUCCESS)
+ if (result != KERN_SUCCESS) {
panic("vm_pressure_thread: create failed");
+ }
thread_deallocate(thread);
#endif
vm_object_reaper_init();
-
- if (COMPRESSED_PAGER_IS_ACTIVE || DEFAULT_FREEZER_COMPRESSED_PAGER_IS_ACTIVE)
+
+
+ bzero(&vm_config, sizeof(vm_config));
+
+ switch (vm_compressor_mode) {
+ case VM_PAGER_DEFAULT:
+ printf("mapping deprecated VM_PAGER_DEFAULT to VM_PAGER_COMPRESSOR_WITH_SWAP\n");
+ OS_FALLTHROUGH;
+
+ case VM_PAGER_COMPRESSOR_WITH_SWAP:
+ vm_config.compressor_is_present = TRUE;
+ vm_config.swap_is_present = TRUE;
+ vm_config.compressor_is_active = TRUE;
+ vm_config.swap_is_active = TRUE;
+ break;
+
+ case VM_PAGER_COMPRESSOR_NO_SWAP:
+ vm_config.compressor_is_present = TRUE;
+ vm_config.swap_is_present = TRUE;
+ vm_config.compressor_is_active = TRUE;
+ break;
+
+ case VM_PAGER_FREEZER_DEFAULT:
+ printf("mapping deprecated VM_PAGER_FREEZER_DEFAULT to VM_PAGER_FREEZER_COMPRESSOR_NO_SWAP\n");
+ OS_FALLTHROUGH;
+
+ case VM_PAGER_FREEZER_COMPRESSOR_NO_SWAP:
+ vm_config.compressor_is_present = TRUE;
+ vm_config.swap_is_present = TRUE;
+ break;
+
+ case VM_PAGER_COMPRESSOR_NO_SWAP_PLUS_FREEZER_COMPRESSOR_WITH_SWAP:
+ vm_config.compressor_is_present = TRUE;
+ vm_config.swap_is_present = TRUE;
+ vm_config.compressor_is_active = TRUE;
+ vm_config.freezer_swap_is_active = TRUE;
+ break;
+
+ case VM_PAGER_NOT_CONFIGURED:
+ break;
+
+ default:
+ printf("unknown compressor mode - %x\n", vm_compressor_mode);
+ break;
+ }
+ if (VM_CONFIG_COMPRESSOR_IS_PRESENT) {
vm_compressor_pager_init();
+ }
+
+#if VM_PRESSURE_EVENTS
+ vm_pressure_events_enabled = TRUE;
+#endif /* VM_PRESSURE_EVENTS */
+#if CONFIG_PHANTOM_CACHE
+ vm_phantom_cache_init();
+#endif
#if VM_PAGE_BUCKETS_CHECK
#if VM_PAGE_FAKE_BUCKETS
printf("**** DEBUG: protecting fake buckets [0x%llx:0x%llx]\n",
- vm_page_fake_buckets_start, vm_page_fake_buckets_end);
+ (uint64_t) vm_page_fake_buckets_start,
+ (uint64_t) vm_page_fake_buckets_end);
pmap_protect(kernel_pmap,
- vm_page_fake_buckets_start,
- vm_page_fake_buckets_end,
- VM_PROT_READ);
+ vm_page_fake_buckets_start,
+ vm_page_fake_buckets_end,
+ VM_PROT_READ);
// *(char *) vm_page_fake_buckets_start = 'x'; /* panic! */
#endif /* VM_PAGE_FAKE_BUCKETS */
#endif /* VM_PAGE_BUCKETS_CHECK */
+#if VM_OBJECT_TRACKING
+ vm_object_tracking_init();
+#endif /* VM_OBJECT_TRACKING */
+
vm_pageout_continue();
/*
-#define MAX_COMRPESSOR_THREAD_COUNT 8
-
-struct cq ciq[MAX_COMRPESSOR_THREAD_COUNT];
-
-int vm_compressor_thread_count = 2;
-
kern_return_t
vm_pageout_internal_start(void)
{
- kern_return_t result;
- int i;
+ kern_return_t result;
host_basic_info_data_t hinfo;
+ vm_offset_t buf, bufsize;
- if (COMPRESSED_PAGER_IS_ACTIVE || DEFAULT_FREEZER_COMPRESSED_PAGER_IS_ACTIVE) {
- mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
-#define BSD_HOST 1
- host_info((host_t)BSD_HOST, HOST_BASIC_INFO, (host_info_t)&hinfo, &count);
+ assert(VM_CONFIG_COMPRESSOR_IS_PRESENT);
- assert(hinfo.max_cpus > 0);
+ mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
+#define BSD_HOST 1
+ host_info((host_t)BSD_HOST, HOST_BASIC_INFO, (host_info_t)&hinfo, &count);
- if (vm_compressor_thread_count >= hinfo.max_cpus)
- vm_compressor_thread_count = hinfo.max_cpus - 1;
- if (vm_compressor_thread_count <= 0)
- vm_compressor_thread_count = 1;
- else if (vm_compressor_thread_count > MAX_COMRPESSOR_THREAD_COUNT)
- vm_compressor_thread_count = MAX_COMRPESSOR_THREAD_COUNT;
+ assert(hinfo.max_cpus > 0);
- vm_pageout_queue_internal.pgo_maxlaundry = (vm_compressor_thread_count * 4) * VM_PAGE_LAUNDRY_MAX;
+#if CONFIG_EMBEDDED
+ vm_pageout_state.vm_compressor_thread_count = 1;
+#else
+ if (hinfo.max_cpus > 4) {
+ vm_pageout_state.vm_compressor_thread_count = 2;
} else {
- vm_compressor_thread_count = 1;
- vm_pageout_queue_internal.pgo_maxlaundry = VM_PAGE_LAUNDRY_MAX;
+ vm_pageout_state.vm_compressor_thread_count = 1;
+ }
+#endif
+ PE_parse_boot_argn("vmcomp_threads", &vm_pageout_state.vm_compressor_thread_count,
+ sizeof(vm_pageout_state.vm_compressor_thread_count));
+
+#if __AMP__
+ PE_parse_boot_argn("vmcomp_ecluster", &vm_compressor_ebound, sizeof(vm_compressor_ebound));
+ if (vm_compressor_ebound) {
+ vm_pageout_state.vm_compressor_thread_count = 2;
+ }
+#endif
+ if (vm_pageout_state.vm_compressor_thread_count >= hinfo.max_cpus) {
+ vm_pageout_state.vm_compressor_thread_count = hinfo.max_cpus - 1;
+ }
+ if (vm_pageout_state.vm_compressor_thread_count <= 0) {
+ vm_pageout_state.vm_compressor_thread_count = 1;
+ } else if (vm_pageout_state.vm_compressor_thread_count > MAX_COMPRESSOR_THREAD_COUNT) {
+ vm_pageout_state.vm_compressor_thread_count = MAX_COMPRESSOR_THREAD_COUNT;
+ }
+
+ vm_pageout_queue_internal.pgo_maxlaundry =
+ (vm_pageout_state.vm_compressor_thread_count * 4) * VM_PAGE_LAUNDRY_MAX;
+
+ PE_parse_boot_argn("vmpgoi_maxlaundry",
+ &vm_pageout_queue_internal.pgo_maxlaundry,
+ sizeof(vm_pageout_queue_internal.pgo_maxlaundry));
+
+ bufsize = COMPRESSOR_SCRATCH_BUF_SIZE;
+ if (kernel_memory_allocate(kernel_map, &buf,
+ bufsize * vm_pageout_state.vm_compressor_thread_count,
+ 0, KMA_KOBJECT | KMA_PERMANENT, VM_KERN_MEMORY_COMPRESSOR)) {
+ panic("vm_pageout_internal_start: Unable to allocate %zd bytes",
+ (size_t)(bufsize * vm_pageout_state.vm_compressor_thread_count));
}
- for (i = 0; i < vm_compressor_thread_count; i++) {
+ for (int i = 0; i < vm_pageout_state.vm_compressor_thread_count; i++) {
+ ciq[i].id = i;
+ ciq[i].q = &vm_pageout_queue_internal;
+ ciq[i].current_chead = NULL;
+ ciq[i].scratch_buf = (char *)(buf + i * bufsize);
- result = kernel_thread_start_priority((thread_continue_t)vm_pageout_iothread_internal, (void *)&ciq[i], BASEPRI_PREEMPT - 1, &vm_pageout_internal_iothread);
- if (result == KERN_SUCCESS)
- thread_deallocate(vm_pageout_internal_iothread);
- else
+ result = kernel_thread_start_priority((thread_continue_t)vm_pageout_iothread_internal,
+ (void *)&ciq[i], BASEPRI_VM,
+ &vm_pageout_state.vm_pageout_internal_iothread);
+
+ if (result == KERN_SUCCESS) {
+ thread_deallocate(vm_pageout_state.vm_pageout_internal_iothread);
+ } else {
break;
+ }
}
return result;
}
+#if CONFIG_IOSCHED
+/*
+ * To support I/O Expedite for compressed files we mark the upls with special flags.
+ * The way decmpfs works is that we create a big upl which marks all the pages needed to
+ * represent the compressed file as busy. We tag this upl with the flag UPL_DECMP_REQ. Decmpfs
+ * then issues smaller I/Os for compressed I/Os, deflates them and puts the data into the pages
+ * being held in the big original UPL. We mark each of these smaller UPLs with the flag
+ * UPL_DECMP_REAL_IO. Any outstanding real I/O UPL is tracked by the big req upl using the
+ * decmp_io_upl field (in the upl structure). This link is protected in the forward direction
+ * by the req upl lock (the reverse link doesnt need synch. since we never inspect this link
+ * unless the real I/O upl is being destroyed).
+ */
+
+
+static void
+upl_set_decmp_info(upl_t upl, upl_t src_upl)
+{
+ assert((src_upl->flags & UPL_DECMP_REQ) != 0);
+
+ upl_lock(src_upl);
+ if (src_upl->decmp_io_upl) {
+ /*
+ * If there is already an alive real I/O UPL, ignore this new UPL.
+ * This case should rarely happen and even if it does, it just means
+ * that we might issue a spurious expedite which the driver is expected
+ * to handle.
+ */
+ upl_unlock(src_upl);
+ return;
+ }
+ src_upl->decmp_io_upl = (void *)upl;
+ src_upl->ref_count++;
+
+ upl->flags |= UPL_DECMP_REAL_IO;
+ upl->decmp_io_upl = (void *)src_upl;
+ upl_unlock(src_upl);
+}
+#endif /* CONFIG_IOSCHED */
+
+#if UPL_DEBUG
+int upl_debug_enabled = 1;
+#else
+int upl_debug_enabled = 0;
+#endif
static upl_t
upl_create(int type, int flags, upl_size_t size)
{
- upl_t upl;
- vm_size_t page_field_size = 0;
- int upl_flags = 0;
- vm_size_t upl_size = sizeof(struct upl);
+ upl_t upl;
+ vm_size_t page_field_size = 0;
+ int upl_flags = 0;
+ vm_size_t upl_size = sizeof(struct upl);
+
+ assert(page_aligned(size));
size = round_page_32(size);
}
upl = (upl_t)kalloc(upl_size + page_field_size);
- if (page_field_size)
- bzero((char *)upl + upl_size, page_field_size);
+ if (page_field_size) {
+ bzero((char *)upl + upl_size, page_field_size);
+ }
upl->flags = upl_flags | flags;
- upl->src_object = NULL;
upl->kaddr = (vm_offset_t)0;
- upl->size = 0;
+ upl->u_offset = 0;
+ upl->u_size = 0;
upl->map_object = NULL;
upl->ref_count = 1;
upl->ext_ref_count = 0;
upl->highest_page = 0;
upl_lock_init(upl);
upl->vector_upl = NULL;
+ upl->associated_upl = NULL;
+ upl->upl_iodone = NULL;
+#if CONFIG_IOSCHED
+ if (type & UPL_CREATE_IO_TRACKING) {
+ upl->upl_priority = proc_get_effective_thread_policy(current_thread(), TASK_POLICY_IO);
+ }
+
+ upl->upl_reprio_info = 0;
+ upl->decmp_io_upl = 0;
+ if ((type & UPL_CREATE_INTERNAL) && (type & UPL_CREATE_EXPEDITE_SUP)) {
+ /* Only support expedite on internal UPLs */
+ thread_t curthread = current_thread();
+ upl->upl_reprio_info = (uint64_t *)kalloc(sizeof(uint64_t) * atop(size));
+ bzero(upl->upl_reprio_info, (sizeof(uint64_t) * atop(size)));
+ upl->flags |= UPL_EXPEDITE_SUPPORTED;
+ if (curthread->decmp_upl != NULL) {
+ upl_set_decmp_info(upl, curthread->decmp_upl);
+ }
+ }
+#endif
+#if CONFIG_IOSCHED || UPL_DEBUG
+ if ((type & UPL_CREATE_IO_TRACKING) || upl_debug_enabled) {
+ upl->upl_creator = current_thread();
+ upl->uplq.next = 0;
+ upl->uplq.prev = 0;
+ upl->flags |= UPL_TRACKED_BY_OBJECT;
+ }
+#endif
+
#if UPL_DEBUG
upl->ubc_alias1 = 0;
upl->ubc_alias2 = 0;
- upl->upl_creator = current_thread();
upl->upl_state = 0;
upl->upl_commit_index = 0;
bzero(&upl->upl_commit_records[0], sizeof(upl->upl_commit_records));
- upl->uplq.next = 0;
- upl->uplq.prev = 0;
-
(void) OSBacktrace(&upl->upl_create_retaddr[0], UPL_DEBUG_STACK_FRAMES);
#endif /* UPL_DEBUG */
- return(upl);
+ return upl;
}
static void
upl_destroy(upl_t upl)
{
- int page_field_size; /* bit field in word size buf */
- int size;
+ int page_field_size; /* bit field in word size buf */
+ int size;
+
+// DEBUG4K_UPL("upl %p (u_offset 0x%llx u_size 0x%llx) object %p\n", upl, (uint64_t)upl->u_offset, (uint64_t)upl->u_size, upl->map_object);
if (upl->ext_ref_count) {
panic("upl(%p) ext_ref_count", upl);
}
-#if UPL_DEBUG
- if ( !(upl->flags & UPL_VECTOR)) {
- vm_object_t object;
+#if CONFIG_IOSCHED
+ if ((upl->flags & UPL_DECMP_REAL_IO) && upl->decmp_io_upl) {
+ upl_t src_upl;
+ src_upl = upl->decmp_io_upl;
+ assert((src_upl->flags & UPL_DECMP_REQ) != 0);
+ upl_lock(src_upl);
+ src_upl->decmp_io_upl = NULL;
+ upl_unlock(src_upl);
+ upl_deallocate(src_upl);
+ }
+#endif /* CONFIG_IOSCHED */
+
+#if CONFIG_IOSCHED || UPL_DEBUG
+ if (((upl->flags & UPL_TRACKED_BY_OBJECT) || upl_debug_enabled) &&
+ !(upl->flags & UPL_VECTOR)) {
+ vm_object_t object;
if (upl->flags & UPL_SHADOWED) {
object = upl->map_object->shadow;
} else {
object = upl->map_object;
}
+
vm_object_lock(object);
queue_remove(&object->uplq, upl, upl_t, uplq);
vm_object_activity_end(object);
vm_object_collapse(object, 0, TRUE);
vm_object_unlock(object);
}
-#endif /* UPL_DEBUG */
+#endif
/*
* drop a reference on the map_object whether or
* not a pageout object is inserted
*/
- if (upl->flags & UPL_SHADOWED)
+ if (upl->flags & UPL_SHADOWED) {
vm_object_deallocate(upl->map_object);
+ }
- if (upl->flags & UPL_DEVICE_MEMORY)
- size = PAGE_SIZE;
- else
- size = upl->size;
+ if (upl->flags & UPL_DEVICE_MEMORY) {
+ size = PAGE_SIZE;
+ } else {
+ size = upl_adjusted_size(upl, PAGE_MASK);
+ }
page_field_size = 0;
if (upl->flags & UPL_LITE) {
- page_field_size = ((size/PAGE_SIZE) + 7) >> 3;
+ page_field_size = ((size / PAGE_SIZE) + 7) >> 3;
page_field_size = (page_field_size + 3) & 0xFFFFFFFC;
}
upl_lock_destroy(upl);
upl->vector_upl = (vector_upl_t) 0xfeedbeef;
+#if CONFIG_IOSCHED
+ if (upl->flags & UPL_EXPEDITE_SUPPORTED) {
+ kfree(upl->upl_reprio_info, sizeof(uint64_t) * (size / PAGE_SIZE));
+ }
+#endif
+
if (upl->flags & UPL_INTERNAL) {
kfree(upl,
- sizeof(struct upl) +
- (sizeof(struct upl_page_info) * (size/PAGE_SIZE))
- + page_field_size);
+ sizeof(struct upl) +
+ (sizeof(struct upl_page_info) * (size / PAGE_SIZE))
+ + page_field_size);
} else {
kfree(upl, sizeof(struct upl) + page_field_size);
}
void
upl_deallocate(upl_t upl)
{
+ upl_lock(upl);
+
if (--upl->ref_count == 0) {
- if(vector_upl_is_valid(upl))
+ if (vector_upl_is_valid(upl)) {
vector_upl_deallocate(upl);
+ }
+ upl_unlock(upl);
+
+ if (upl->upl_iodone) {
+ upl_callout_iodone(upl);
+ }
+
upl_destroy(upl);
+ } else {
+ upl_unlock(upl);
+ }
+}
+
+#if CONFIG_IOSCHED
+void
+upl_mark_decmp(upl_t upl)
+{
+ if (upl->flags & UPL_TRACKED_BY_OBJECT) {
+ upl->flags |= UPL_DECMP_REQ;
+ upl->upl_creator->decmp_upl = (void *)upl;
+ }
+}
+
+void
+upl_unmark_decmp(upl_t upl)
+{
+ if (upl && (upl->flags & UPL_DECMP_REQ)) {
+ upl->upl_creator->decmp_upl = NULL;
+ }
+}
+
+#endif /* CONFIG_IOSCHED */
+
+#define VM_PAGE_Q_BACKING_UP(q) \
+ ((q)->pgo_laundry >= (((q)->pgo_maxlaundry * 8) / 10))
+
+boolean_t must_throttle_writes(void);
+
+boolean_t
+must_throttle_writes()
+{
+ if (VM_PAGE_Q_BACKING_UP(&vm_pageout_queue_external) &&
+ vm_page_pageable_external_count > (AVAILABLE_NON_COMPRESSED_MEMORY * 6) / 10) {
+ return TRUE;
}
+
+ return FALSE;
}
+#define MIN_DELAYED_WORK_CTX_ALLOCATED (16)
+#define MAX_DELAYED_WORK_CTX_ALLOCATED (512)
+
+int vm_page_delayed_work_ctx_needed = 0;
+zone_t dw_ctx_zone = ZONE_NULL;
+
+void
+vm_page_delayed_work_init_ctx(void)
+{
+ int nelems = 0, elem_size = 0;
+
+ elem_size = sizeof(struct vm_page_delayed_work_ctx);
+
+ dw_ctx_zone = zone_create_ext("delayed-work-ctx", elem_size,
+ ZC_NOGC, ZONE_ID_ANY, ^(zone_t z) {
+ zone_set_exhaustible(z, MAX_DELAYED_WORK_CTX_ALLOCATED * elem_size);
+ });
+
+ nelems = zfill(dw_ctx_zone, MIN_DELAYED_WORK_CTX_ALLOCATED);
+ if (nelems < MIN_DELAYED_WORK_CTX_ALLOCATED) {
+ printf("vm_page_delayed_work_init_ctx: Failed to preallocate minimum delayed work contexts (%d vs %d).\n", nelems, MIN_DELAYED_WORK_CTX_ALLOCATED);
#if DEVELOPMENT || DEBUG
-/*/*
- * Statistics about UPL enforcement of copy-on-write obligations.
- */
-unsigned long upl_cow = 0;
-unsigned long upl_cow_again = 0;
-unsigned long upl_cow_pages = 0;
-unsigned long upl_cow_again_pages = 0;
+ panic("Failed to preallocate minimum delayed work contexts (%d vs %d).\n", nelems, MIN_DELAYED_WORK_CTX_ALLOCATED);
+#endif /* DEVELOPMENT || DEBUG */
+ }
+}
-unsigned long iopl_cow = 0;
-unsigned long iopl_cow_pages = 0;
-#endif
+struct vm_page_delayed_work*
+vm_page_delayed_work_get_ctx(void)
+{
+ struct vm_page_delayed_work_ctx * dw_ctx = NULL;
+
+ dw_ctx = (struct vm_page_delayed_work_ctx*) zalloc_noblock(dw_ctx_zone);
+
+ if (dw_ctx) {
+ dw_ctx->delayed_owner = current_thread();
+ } else {
+ vm_page_delayed_work_ctx_needed++;
+ }
+ return dw_ctx ? dw_ctx->dwp : NULL;
+}
+
+void
+vm_page_delayed_work_finish_ctx(struct vm_page_delayed_work* dwp)
+{
+ struct vm_page_delayed_work_ctx *ldw_ctx;
+
+ ldw_ctx = (struct vm_page_delayed_work_ctx *)dwp;
+ ldw_ctx->delayed_owner = NULL;
+
+ zfree(dw_ctx_zone, ldw_ctx);
+}
-/*
- * Routine: vm_object_upl_request
- * Purpose:
+/*
+ * Routine: vm_object_upl_request
+ * Purpose:
* Cause the population of a portion of a vm_object.
* Depending on the nature of the request, the pages
* returned may be contain valid data or be uninitialized.
* IMPORTANT NOTE: The caller must still respect the relationship
* between the vm_object and its backing memory object. The
* caller MUST NOT substitute changes in the backing file
- * without first doing a memory_object_lock_request on the
+ * without first doing a memory_object_lock_request on the
* target range unless it is know that the pages are not
* shared with another entity at the pager level.
* Copy_in_to:
* all mapped pages. Where a page does not exist
* map a zero filled one. Leave pages busy in
* the original object. If a page list structure
- * is not specified, this call is a no-op.
+ * is not specified, this call is a no-op.
*
* Note: access of default pager objects has a rather interesting
* twist. The caller of this routine, presumably the file system
* against a default pager backed object. Only the default
* pager will make requests on backing store related vm_objects
* In this way the default pager can maintain the relationship
- * between backing store files (abstract memory objects) and
+ * between backing store files (abstract memory objects) and
* the vm_objects (cache objects), they support.
*
*/
__private_extern__ kern_return_t
vm_object_upl_request(
- vm_object_t object,
- vm_object_offset_t offset,
- upl_size_t size,
- upl_t *upl_ptr,
- upl_page_info_array_t user_page_list,
- unsigned int *page_list_count,
- int cntrl_flags)
+ vm_object_t object,
+ vm_object_offset_t offset,
+ upl_size_t size,
+ upl_t *upl_ptr,
+ upl_page_info_array_t user_page_list,
+ unsigned int *page_list_count,
+ upl_control_flags_t cntrl_flags,
+ vm_tag_t tag)
{
- vm_page_t dst_page = VM_PAGE_NULL;
- vm_object_offset_t dst_offset;
- upl_size_t xfer_size;
- unsigned int size_in_pages;
- boolean_t dirty;
- boolean_t hw_dirty;
- upl_t upl = NULL;
- unsigned int entry;
-#if MACH_CLUSTER_STATS
- boolean_t encountered_lrp = FALSE;
-#endif
- vm_page_t alias_page = NULL;
- int refmod_state = 0;
- wpl_array_t lite_list = NULL;
- vm_object_t last_copy_object;
- struct vm_page_delayed_work dw_array[DEFAULT_DELAYED_WORK_LIMIT];
- struct vm_page_delayed_work *dwp;
- int dw_count;
- int dw_limit;
+ vm_page_t dst_page = VM_PAGE_NULL;
+ vm_object_offset_t dst_offset;
+ upl_size_t xfer_size;
+ unsigned int size_in_pages;
+ boolean_t dirty;
+ boolean_t hw_dirty;
+ upl_t upl = NULL;
+ unsigned int entry;
+ vm_page_t alias_page = NULL;
+ int refmod_state = 0;
+ wpl_array_t lite_list = NULL;
+ vm_object_t last_copy_object;
+ struct vm_page_delayed_work dw_array;
+ struct vm_page_delayed_work *dwp, *dwp_start;
+ bool dwp_finish_ctx = TRUE;
+ int dw_count;
+ int dw_limit;
+ int io_tracking_flag = 0;
+ int grab_options;
+ int page_grab_count = 0;
+ ppnum_t phys_page;
+ pmap_flush_context pmap_flush_context_storage;
+ boolean_t pmap_flushes_delayed = FALSE;
+#if DEVELOPMENT || DEBUG
+ task_t task = current_task();
+#endif /* DEVELOPMENT || DEBUG */
+
+ dwp_start = dwp = NULL;
if (cntrl_flags & ~UPL_VALID_FLAGS) {
/*
*/
return KERN_INVALID_VALUE;
}
- if ( (!object->internal) && (object->paging_offset != 0) )
+ if ((!object->internal) && (object->paging_offset != 0)) {
panic("vm_object_upl_request: external object with non-zero paging offset\n");
- if (object->phys_contiguous)
- panic("vm_object_upl_request: contiguous object specified\n");
+ }
+ if (object->phys_contiguous) {
+ panic("vm_object_upl_request: contiguous object specified\n");
+ }
+ assertf(page_aligned(offset) && page_aligned(size),
+ "offset 0x%llx size 0x%x",
+ offset, size);
- if ((size / PAGE_SIZE) > MAX_UPL_SIZE)
- size = MAX_UPL_SIZE * PAGE_SIZE;
+ VM_DEBUG_CONSTANT_EVENT(vm_object_upl_request, VM_UPL_REQUEST, DBG_FUNC_START, size, cntrl_flags, 0, 0);
- if ( (cntrl_flags & UPL_SET_INTERNAL) && page_list_count != NULL)
- *page_list_count = MAX_UPL_SIZE;
+ dw_count = 0;
+ dw_limit = DELAYED_WORK_LIMIT(DEFAULT_DELAYED_WORK_LIMIT);
+ dwp_start = vm_page_delayed_work_get_ctx();
+ if (dwp_start == NULL) {
+ dwp_start = &dw_array;
+ dw_limit = 1;
+ dwp_finish_ctx = FALSE;
+ }
- if (cntrl_flags & UPL_SET_INTERNAL) {
- if (cntrl_flags & UPL_SET_LITE) {
+ dwp = dwp_start;
+
+ if (size > MAX_UPL_SIZE_BYTES) {
+ size = MAX_UPL_SIZE_BYTES;
+ }
+
+ if ((cntrl_flags & UPL_SET_INTERNAL) && page_list_count != NULL) {
+ *page_list_count = MAX_UPL_SIZE_BYTES >> PAGE_SHIFT;
+ }
- upl = upl_create(UPL_CREATE_INTERNAL | UPL_CREATE_LITE, 0, size);
+#if CONFIG_IOSCHED || UPL_DEBUG
+ if (object->io_tracking || upl_debug_enabled) {
+ io_tracking_flag |= UPL_CREATE_IO_TRACKING;
+ }
+#endif
+#if CONFIG_IOSCHED
+ if (object->io_tracking) {
+ io_tracking_flag |= UPL_CREATE_EXPEDITE_SUP;
+ }
+#endif
+
+ if (cntrl_flags & UPL_SET_INTERNAL) {
+ if (cntrl_flags & UPL_SET_LITE) {
+ upl = upl_create(UPL_CREATE_INTERNAL | UPL_CREATE_LITE | io_tracking_flag, 0, size);
user_page_list = (upl_page_info_t *) (((uintptr_t)upl) + sizeof(struct upl));
lite_list = (wpl_array_t)
- (((uintptr_t)user_page_list) +
- ((size/PAGE_SIZE) * sizeof(upl_page_info_t)));
+ (((uintptr_t)user_page_list) +
+ ((size / PAGE_SIZE) * sizeof(upl_page_info_t)));
if (size == 0) {
user_page_list = NULL;
lite_list = NULL;
}
} else {
- upl = upl_create(UPL_CREATE_INTERNAL, 0, size);
+ upl = upl_create(UPL_CREATE_INTERNAL | io_tracking_flag, 0, size);
user_page_list = (upl_page_info_t *) (((uintptr_t)upl) + sizeof(struct upl));
if (size == 0) {
}
}
} else {
- if (cntrl_flags & UPL_SET_LITE) {
-
- upl = upl_create(UPL_CREATE_EXTERNAL | UPL_CREATE_LITE, 0, size);
+ if (cntrl_flags & UPL_SET_LITE) {
+ upl = upl_create(UPL_CREATE_EXTERNAL | UPL_CREATE_LITE | io_tracking_flag, 0, size);
lite_list = (wpl_array_t) (((uintptr_t)upl) + sizeof(struct upl));
if (size == 0) {
lite_list = NULL;
}
} else {
- upl = upl_create(UPL_CREATE_EXTERNAL, 0, size);
+ upl = upl_create(UPL_CREATE_EXTERNAL | io_tracking_flag, 0, size);
}
}
*upl_ptr = upl;
-
- if (user_page_list)
- user_page_list[0].device = FALSE;
+
+ if (user_page_list) {
+ user_page_list[0].device = FALSE;
+ }
if (cntrl_flags & UPL_SET_LITE) {
- upl->map_object = object;
+ upl->map_object = object;
} else {
- upl->map_object = vm_object_allocate(size);
+ upl->map_object = vm_object_allocate(size);
/*
* No neeed to lock the new object: nobody else knows
* about it yet, so it's all ours so far.
upl->map_object->copy_strategy = MEMORY_OBJECT_COPY_NONE;
upl->map_object->vo_shadow_offset = offset;
upl->map_object->wimg_bits = object->wimg_bits;
+ assertf(page_aligned(upl->map_object->vo_shadow_offset),
+ "object %p shadow_offset 0x%llx",
+ upl->map_object, upl->map_object->vo_shadow_offset);
VM_PAGE_GRAB_FICTITIOUS(alias_page);
upl->flags |= UPL_SHADOWED;
}
- /*
- * ENCRYPTED SWAP:
- * Just mark the UPL as "encrypted" here.
- * We'll actually encrypt the pages later,
- * in upl_encrypt(), when the caller has
- * selected which pages need to go to swap.
- */
- if (cntrl_flags & UPL_ENCRYPT)
- upl->flags |= UPL_ENCRYPTED;
-
- if (cntrl_flags & UPL_FOR_PAGEOUT)
+ if (cntrl_flags & UPL_FOR_PAGEOUT) {
upl->flags |= UPL_PAGEOUT;
+ }
vm_object_lock(object);
vm_object_activity_begin(object);
+ grab_options = 0;
+#if CONFIG_SECLUDED_MEMORY
+ if (object->can_grab_secluded) {
+ grab_options |= VM_PAGE_GRAB_SECLUDED;
+ }
+#endif /* CONFIG_SECLUDED_MEMORY */
+
/*
* we can lock in the paging_offset once paging_in_progress is set
*/
- upl->size = size;
- upl->offset = offset + object->paging_offset;
-
-#if UPL_DEBUG
- vm_object_activity_begin(object);
- queue_enter(&object->uplq, upl, upl_t, uplq);
-#endif /* UPL_DEBUG */
+ upl->u_size = size;
+ upl->u_offset = offset + object->paging_offset;
+#if CONFIG_IOSCHED || UPL_DEBUG
+ if (object->io_tracking || upl_debug_enabled) {
+ vm_object_activity_begin(object);
+ queue_enter(&object->uplq, upl, upl_t, uplq);
+ }
+#endif
if ((cntrl_flags & UPL_WILL_MODIFY) && object->copy != VM_OBJECT_NULL) {
/*
* Honor copy-on-write obligations
* the caller modify them.
*/
vm_object_update(object,
- offset,
- size,
- NULL,
- NULL,
- FALSE, /* should_return */
- MEMORY_OBJECT_COPY_SYNC,
- VM_PROT_NO_CHANGE);
-#if DEVELOPMENT || DEBUG
- upl_cow++;
- upl_cow_pages += size >> PAGE_SHIFT;
-#endif
+ offset,
+ size,
+ NULL,
+ NULL,
+ FALSE, /* should_return */
+ MEMORY_OBJECT_COPY_SYNC,
+ VM_PROT_NO_CHANGE);
+
+ VM_PAGEOUT_DEBUG(upl_cow, 1);
+ VM_PAGEOUT_DEBUG(upl_cow_pages, (size >> PAGE_SHIFT));
}
/*
* remember which copy object we synchronized with
dst_offset = offset;
size_in_pages = size / PAGE_SIZE;
- dwp = &dw_array[0];
- dw_count = 0;
- dw_limit = DELAYED_WORK_LIMIT(DEFAULT_DELAYED_WORK_LIMIT);
-
if (vm_page_free_count > (vm_page_free_target + size_in_pages) ||
- object->resident_page_count < (MAX_UPL_SIZE * 2))
+ object->resident_page_count < ((MAX_UPL_SIZE_BYTES * 2) >> PAGE_SHIFT)) {
object->scan_collisions = 0;
+ }
+
+ if ((cntrl_flags & UPL_WILL_MODIFY) && must_throttle_writes() == TRUE) {
+ boolean_t isSSD = FALSE;
+
+#if CONFIG_EMBEDDED
+ isSSD = TRUE;
+#else
+ vnode_pager_get_isSSD(object->pager, &isSSD);
+#endif
+ vm_object_unlock(object);
+
+ OSAddAtomic(size_in_pages, &vm_upl_wait_for_pages);
+
+ if (isSSD == TRUE) {
+ delay(1000 * size_in_pages);
+ } else {
+ delay(5000 * size_in_pages);
+ }
+ OSAddAtomic(-size_in_pages, &vm_upl_wait_for_pages);
+
+ vm_object_lock(object);
+ }
while (xfer_size) {
-
dwp->dw_mask = 0;
if ((alias_page == NULL) && !(cntrl_flags & UPL_SET_LITE)) {
vm_object_lock(object);
}
if (cntrl_flags & UPL_COPYOUT_FROM) {
- upl->flags |= UPL_PAGE_SYNC_DONE;
-
- if ( ((dst_page = vm_page_lookup(object, dst_offset)) == VM_PAGE_NULL) ||
- dst_page->fictitious ||
- dst_page->absent ||
- dst_page->error ||
- dst_page->cleaning ||
- (VM_PAGE_WIRED(dst_page))) {
-
- if (user_page_list)
+ upl->flags |= UPL_PAGE_SYNC_DONE;
+
+ if (((dst_page = vm_page_lookup(object, dst_offset)) == VM_PAGE_NULL) ||
+ dst_page->vmp_fictitious ||
+ dst_page->vmp_absent ||
+ dst_page->vmp_error ||
+ dst_page->vmp_cleaning ||
+ (VM_PAGE_WIRED(dst_page))) {
+ if (user_page_list) {
user_page_list[entry].phys_addr = 0;
+ }
goto try_next_page;
}
+ phys_page = VM_PAGE_GET_PHYS_PAGE(dst_page);
+
/*
* grab this up front...
* a high percentange of the time we're going to
* anyway... so we can eliminate an extra call into
* the pmap layer by grabbing it here and recording it
*/
- if (dst_page->pmapped)
- refmod_state = pmap_get_refmod(dst_page->phys_page);
- else
- refmod_state = 0;
+ if (dst_page->vmp_pmapped) {
+ refmod_state = pmap_get_refmod(phys_page);
+ } else {
+ refmod_state = 0;
+ }
- if ( (refmod_state & VM_MEM_REFERENCED) && dst_page->inactive ) {
- /*
+ if ((refmod_state & VM_MEM_REFERENCED) && VM_PAGE_INACTIVE(dst_page)) {
+ /*
* page is on inactive list and referenced...
* reactivate it now... this gets it out of the
* way of vm_pageout_scan which would have to
dwp->dw_mask |= DW_vm_page_activate;
}
if (cntrl_flags & UPL_RET_ONLY_DIRTY) {
- /*
+ /*
* we're only asking for DIRTY pages to be returned
*/
- if (dst_page->laundry || !(cntrl_flags & UPL_FOR_PAGEOUT)) {
- /*
+ if (dst_page->vmp_laundry || !(cntrl_flags & UPL_FOR_PAGEOUT)) {
+ /*
* if we were the page stolen by vm_pageout_scan to be
- * cleaned (as opposed to a buddy being clustered in
+ * cleaned (as opposed to a buddy being clustered in
* or this request is not being driven by a PAGEOUT cluster
* then we only need to check for the page being dirty or
* precious to decide whether to return it
*/
- if (dst_page->dirty || dst_page->precious || (refmod_state & VM_MEM_MODIFIED))
- goto check_busy;
+ if (dst_page->vmp_dirty || dst_page->vmp_precious || (refmod_state & VM_MEM_MODIFIED)) {
+ goto check_busy;
+ }
goto dont_return;
}
/*
* does it have to be dirty to be returned, but it also
* can't have been referenced recently...
*/
- if ( (hibernate_cleaning_in_progress == TRUE ||
- (!((refmod_state & VM_MEM_REFERENCED) || dst_page->reference) || dst_page->throttled)) &&
- ((refmod_state & VM_MEM_MODIFIED) || dst_page->dirty || dst_page->precious) ) {
- goto check_busy;
+ if ((hibernate_cleaning_in_progress == TRUE ||
+ (!((refmod_state & VM_MEM_REFERENCED) || dst_page->vmp_reference) ||
+ (dst_page->vmp_q_state == VM_PAGE_ON_THROTTLED_Q))) &&
+ ((refmod_state & VM_MEM_MODIFIED) || dst_page->vmp_dirty || dst_page->vmp_precious)) {
+ goto check_busy;
}
dont_return:
/*
* if we reach here, we're not to return
* the page... go on to the next one
*/
- if (dst_page->laundry == TRUE) {
+ if (dst_page->vmp_laundry == TRUE) {
/*
* if we get here, the page is not 'cleaning' (filtered out above).
* since it has been referenced, remove it from the laundry
vm_pageout_steal_laundry(dst_page, TRUE);
vm_page_activate(dst_page);
-
+
vm_page_unlock_queues();
}
- if (user_page_list)
- user_page_list[entry].phys_addr = 0;
+ if (user_page_list) {
+ user_page_list[entry].phys_addr = 0;
+ }
goto try_next_page;
}
-check_busy:
- if (dst_page->busy) {
- if (cntrl_flags & UPL_NOBLOCK) {
- if (user_page_list)
- user_page_list[entry].phys_addr = 0;
+check_busy:
+ if (dst_page->vmp_busy) {
+ if (cntrl_flags & UPL_NOBLOCK) {
+ if (user_page_list) {
+ user_page_list[entry].phys_addr = 0;
+ }
+ dwp->dw_mask = 0;
goto try_next_page;
}
continue;
}
- /*
- * ENCRYPTED SWAP:
- * The caller is gathering this page and might
- * access its contents later on. Decrypt the
- * page before adding it to the UPL, so that
- * the caller never sees encrypted data.
- */
- if (! (cntrl_flags & UPL_ENCRYPT) && dst_page->encrypted) {
- int was_busy;
-
- /*
- * save the current state of busy
- * mark page as busy while decrypt
- * is in progress since it will drop
- * the object lock...
- */
- was_busy = dst_page->busy;
- dst_page->busy = TRUE;
-
- vm_page_decrypt(dst_page, 0);
- vm_page_decrypt_for_upl_counter++;
- /*
- * restore to original busy state
- */
- dst_page->busy = was_busy;
- }
- if (dst_page->pageout_queue == TRUE) {
-
+ if (dst_page->vmp_q_state == VM_PAGE_ON_PAGEOUT_Q) {
vm_page_lockspin_queues();
- if (dst_page->pageout_queue == TRUE) {
+ if (dst_page->vmp_q_state == VM_PAGE_ON_PAGEOUT_Q) {
/*
* we've buddied up a page for a clustered pageout
* that has already been moved to the pageout
}
vm_page_unlock_queues();
}
-#if MACH_CLUSTER_STATS
- /*
- * pageout statistics gathering. count
- * all the pages we will page out that
- * were not counted in the initial
- * vm_pageout_scan work
- */
- if (dst_page->pageout)
- encountered_lrp = TRUE;
- if ((dst_page->dirty || (dst_page->object->internal && dst_page->precious))) {
- if (encountered_lrp)
- CLUSTER_STAT(pages_at_higher_offsets++;)
- else
- CLUSTER_STAT(pages_at_lower_offsets++;)
- }
-#endif
hw_dirty = refmod_state & VM_MEM_MODIFIED;
- dirty = hw_dirty ? TRUE : dst_page->dirty;
+ dirty = hw_dirty ? TRUE : dst_page->vmp_dirty;
+
+ if (phys_page > upl->highest_page) {
+ upl->highest_page = phys_page;
+ }
- if (dst_page->phys_page > upl->highest_page)
- upl->highest_page = dst_page->phys_page;
+ assert(!pmap_is_noencrypt(phys_page));
if (cntrl_flags & UPL_SET_LITE) {
- unsigned int pg_num;
+ unsigned int pg_num;
- pg_num = (unsigned int) ((dst_offset-offset)/PAGE_SIZE);
- assert(pg_num == (dst_offset-offset)/PAGE_SIZE);
- lite_list[pg_num>>5] |= 1 << (pg_num & 31);
+ pg_num = (unsigned int) ((dst_offset - offset) / PAGE_SIZE);
+ assert(pg_num == (dst_offset - offset) / PAGE_SIZE);
+ lite_list[pg_num >> 5] |= 1U << (pg_num & 31);
- if (hw_dirty)
- pmap_clear_modify(dst_page->phys_page);
+ if (hw_dirty) {
+ if (pmap_flushes_delayed == FALSE) {
+ pmap_flush_context_init(&pmap_flush_context_storage);
+ pmap_flushes_delayed = TRUE;
+ }
+ pmap_clear_refmod_options(phys_page,
+ VM_MEM_MODIFIED,
+ PMAP_OPTIONS_NOFLUSH | PMAP_OPTIONS_CLEAR_WRITE,
+ &pmap_flush_context_storage);
+ }
/*
- * Mark original page as cleaning
+ * Mark original page as cleaning
* in place.
*/
- dst_page->cleaning = TRUE;
- dst_page->precious = FALSE;
+ dst_page->vmp_cleaning = TRUE;
+ dst_page->vmp_precious = FALSE;
} else {
- /*
+ /*
* use pageclean setup, it is more
* convenient even for the pageout
* cases here
*/
- vm_object_lock(upl->map_object);
+ vm_object_lock(upl->map_object);
vm_pageclean_setup(dst_page, alias_page, upl->map_object, size - xfer_size);
vm_object_unlock(upl->map_object);
- alias_page->absent = FALSE;
+ alias_page->vmp_absent = FALSE;
alias_page = NULL;
}
-#if MACH_PAGEMAP
- /*
- * Record that this page has been
- * written out
- */
- vm_external_state_set(object->existence_map, dst_page->offset);
-#endif /*MACH_PAGEMAP*/
if (dirty) {
SET_PAGE_DIRTY(dst_page, FALSE);
} else {
- dst_page->dirty = FALSE;
- }
-
- if (!dirty)
- dst_page->precious = TRUE;
-
- if ( (cntrl_flags & UPL_ENCRYPT) ) {
- /*
- * ENCRYPTED SWAP:
- * We want to deny access to the target page
- * because its contents are about to be
- * encrypted and the user would be very
- * confused to see encrypted data instead
- * of their data.
- * We also set "encrypted_cleaning" to allow
- * vm_pageout_scan() to demote that page
- * from "adjacent/clean-in-place" to
- * "target/clean-and-free" if it bumps into
- * this page during its scanning while we're
- * still processing this cluster.
- */
- dst_page->busy = TRUE;
- dst_page->encrypted_cleaning = TRUE;
+ dst_page->vmp_dirty = FALSE;
+ }
+
+ if (!dirty) {
+ dst_page->vmp_precious = TRUE;
}
- if ( !(cntrl_flags & UPL_CLEAN_IN_PLACE) ) {
- if ( !VM_PAGE_WIRED(dst_page))
- dst_page->pageout = TRUE;
+
+ if (!(cntrl_flags & UPL_CLEAN_IN_PLACE)) {
+ if (!VM_PAGE_WIRED(dst_page)) {
+ dst_page->vmp_free_when_done = TRUE;
+ }
}
} else {
if ((cntrl_flags & UPL_WILL_MODIFY) && object->copy != last_copy_object) {
xfer_size, /* remaining size */
NULL,
NULL,
- FALSE, /* should_return */
+ FALSE, /* should_return */
MEMORY_OBJECT_COPY_SYNC,
VM_PROT_NO_CHANGE);
-#if DEVELOPMENT || DEBUG
- upl_cow_again++;
- upl_cow_again_pages += xfer_size >> PAGE_SHIFT;
-#endif
+ VM_PAGEOUT_DEBUG(upl_cow_again, 1);
+ VM_PAGEOUT_DEBUG(upl_cow_again_pages, (xfer_size >> PAGE_SHIFT));
}
/*
* remember the copy object we synced with
last_copy_object = object->copy;
}
dst_page = vm_page_lookup(object, dst_offset);
-
- if (dst_page != VM_PAGE_NULL) {
+ if (dst_page != VM_PAGE_NULL) {
if ((cntrl_flags & UPL_RET_ONLY_ABSENT)) {
/*
* skip over pages already present in the cache
*/
- if (user_page_list)
+ if (user_page_list) {
user_page_list[entry].phys_addr = 0;
+ }
goto try_next_page;
}
- if (dst_page->fictitious) {
+ if (dst_page->vmp_fictitious) {
panic("need corner case for fictitious page");
}
- if (dst_page->busy || dst_page->cleaning) {
+ if (dst_page->vmp_busy || dst_page->vmp_cleaning) {
/*
* someone else is playing with the
* page. We will have to wait.
continue;
}
- if (dst_page->laundry) {
- dst_page->pageout = FALSE;
-
+ if (dst_page->vmp_laundry) {
vm_pageout_steal_laundry(dst_page, FALSE);
}
} else {
if (object->private) {
- /*
- * This is a nasty wrinkle for users
- * of upl who encounter device or
- * private memory however, it is
+ /*
+ * This is a nasty wrinkle for users
+ * of upl who encounter device or
+ * private memory however, it is
* unavoidable, only a fault can
* resolve the actual backing
* physical page by asking the
* backing device.
*/
- if (user_page_list)
+ if (user_page_list) {
user_page_list[entry].phys_addr = 0;
+ }
goto try_next_page;
}
*/
dst_page = vm_object_page_grab(object);
- if (dst_page != VM_PAGE_NULL)
- vm_page_release(dst_page);
+ if (dst_page != VM_PAGE_NULL) {
+ vm_page_release(dst_page,
+ FALSE);
+ }
dst_page = vm_object_page_grab(object);
}
/*
* need to allocate a page
*/
- dst_page = vm_page_grab();
+ dst_page = vm_page_grab_options(grab_options);
+ if (dst_page != VM_PAGE_NULL) {
+ page_grab_count++;
+ }
}
if (dst_page == VM_PAGE_NULL) {
- if ( (cntrl_flags & (UPL_RET_ONLY_ABSENT | UPL_NOBLOCK)) == (UPL_RET_ONLY_ABSENT | UPL_NOBLOCK)) {
- /*
- * we don't want to stall waiting for pages to come onto the free list
- * while we're already holding absent pages in this UPL
- * the caller will deal with the empty slots
- */
- if (user_page_list)
- user_page_list[entry].phys_addr = 0;
+ if ((cntrl_flags & (UPL_RET_ONLY_ABSENT | UPL_NOBLOCK)) == (UPL_RET_ONLY_ABSENT | UPL_NOBLOCK)) {
+ /*
+ * we don't want to stall waiting for pages to come onto the free list
+ * while we're already holding absent pages in this UPL
+ * the caller will deal with the empty slots
+ */
+ if (user_page_list) {
+ user_page_list[entry].phys_addr = 0;
+ }
goto try_next_page;
}
- /*
+ /*
* no pages available... wait
* then try again for the same
* offset...
*/
vm_object_unlock(object);
-
+
OSAddAtomic(size_in_pages, &vm_upl_wait_for_pages);
VM_DEBUG_EVENT(vm_upl_page_wait, VM_UPL_PAGE_WAIT, DBG_FUNC_START, vm_upl_wait_for_pages, 0, 0, 0);
}
vm_page_insert(dst_page, object, dst_offset);
- dst_page->absent = TRUE;
- dst_page->busy = FALSE;
+ dst_page->vmp_absent = TRUE;
+ dst_page->vmp_busy = FALSE;
if (cntrl_flags & UPL_RET_ONLY_ABSENT) {
- /*
+ /*
* if UPL_RET_ONLY_ABSENT was specified,
* than we're definitely setting up a
- * upl for a clustered read/pagein
+ * upl for a clustered read/pagein
* operation... mark the pages as clustered
* so upl_commit_range can put them on the
* speculative list
*/
- dst_page->clustered = TRUE;
+ dst_page->vmp_clustered = TRUE;
+
+ if (!(cntrl_flags & UPL_FILE_IO)) {
+ VM_STAT_INCR(pageins);
+ }
}
}
- /*
- * ENCRYPTED SWAP:
- */
- if (cntrl_flags & UPL_ENCRYPT) {
- /*
- * The page is going to be encrypted when we
- * get it from the pager, so mark it so.
- */
- dst_page->encrypted = TRUE;
- } else {
- /*
- * Otherwise, the page will not contain
- * encrypted data.
- */
- dst_page->encrypted = FALSE;
- }
- dst_page->overwriting = TRUE;
+ phys_page = VM_PAGE_GET_PHYS_PAGE(dst_page);
+
+ dst_page->vmp_overwriting = TRUE;
- if (dst_page->pmapped) {
- if ( !(cntrl_flags & UPL_FILE_IO))
- /*
+ if (dst_page->vmp_pmapped) {
+ if (!(cntrl_flags & UPL_FILE_IO)) {
+ /*
* eliminate all mappings from the
* original object and its prodigy
*/
- refmod_state = pmap_disconnect(dst_page->phys_page);
- else
- refmod_state = pmap_get_refmod(dst_page->phys_page);
- } else
- refmod_state = 0;
+ refmod_state = pmap_disconnect(phys_page);
+ } else {
+ refmod_state = pmap_get_refmod(phys_page);
+ }
+ } else {
+ refmod_state = 0;
+ }
hw_dirty = refmod_state & VM_MEM_MODIFIED;
- dirty = hw_dirty ? TRUE : dst_page->dirty;
+ dirty = hw_dirty ? TRUE : dst_page->vmp_dirty;
if (cntrl_flags & UPL_SET_LITE) {
- unsigned int pg_num;
+ unsigned int pg_num;
- pg_num = (unsigned int) ((dst_offset-offset)/PAGE_SIZE);
- assert(pg_num == (dst_offset-offset)/PAGE_SIZE);
- lite_list[pg_num>>5] |= 1 << (pg_num & 31);
+ pg_num = (unsigned int) ((dst_offset - offset) / PAGE_SIZE);
+ assert(pg_num == (dst_offset - offset) / PAGE_SIZE);
+ lite_list[pg_num >> 5] |= 1U << (pg_num & 31);
- if (hw_dirty)
- pmap_clear_modify(dst_page->phys_page);
+ if (hw_dirty) {
+ pmap_clear_modify(phys_page);
+ }
/*
- * Mark original page as cleaning
+ * Mark original page as cleaning
* in place.
*/
- dst_page->cleaning = TRUE;
- dst_page->precious = FALSE;
+ dst_page->vmp_cleaning = TRUE;
+ dst_page->vmp_precious = FALSE;
} else {
/*
* use pageclean setup, it is more
* convenient even for the pageout
* cases here
*/
- vm_object_lock(upl->map_object);
+ vm_object_lock(upl->map_object);
vm_pageclean_setup(dst_page, alias_page, upl->map_object, size - xfer_size);
- vm_object_unlock(upl->map_object);
+ vm_object_unlock(upl->map_object);
- alias_page->absent = FALSE;
+ alias_page->vmp_absent = FALSE;
alias_page = NULL;
}
upl->flags &= ~UPL_CLEAR_DIRTY;
upl->flags |= UPL_SET_DIRTY;
dirty = TRUE;
- upl->flags |= UPL_SET_DIRTY;
+ /*
+ * Page belonging to a code-signed object is about to
+ * be written. Mark it tainted and disconnect it from
+ * all pmaps so processes have to fault it back in and
+ * deal with the tainted bit.
+ */
+ if (object->code_signed && dst_page->vmp_cs_tainted != VMP_CS_ALL_TRUE) {
+ dst_page->vmp_cs_tainted = VMP_CS_ALL_TRUE;
+ vm_page_upl_tainted++;
+ if (dst_page->vmp_pmapped) {
+ refmod_state = pmap_disconnect(VM_PAGE_GET_PHYS_PAGE(dst_page));
+ if (refmod_state & VM_MEM_REFERENCED) {
+ dst_page->vmp_reference = TRUE;
+ }
+ }
+ }
} else if (cntrl_flags & UPL_CLEAN_IN_PLACE) {
/*
* clean in place for read implies
*/
upl->flags |= UPL_CLEAR_DIRTY;
}
- dst_page->dirty = dirty;
+ dst_page->vmp_dirty = dirty;
- if (!dirty)
- dst_page->precious = TRUE;
+ if (!dirty) {
+ dst_page->vmp_precious = TRUE;
+ }
- if ( !VM_PAGE_WIRED(dst_page)) {
- /*
+ if (!VM_PAGE_WIRED(dst_page)) {
+ /*
* deny access to the target page while
* it is being worked on
*/
- dst_page->busy = TRUE;
- } else
+ dst_page->vmp_busy = TRUE;
+ } else {
dwp->dw_mask |= DW_vm_page_wire;
+ }
/*
* We might be about to satisfy a fault which has been
* requested. So no need for the "restart" bit.
*/
- dst_page->restart = FALSE;
- if (!dst_page->absent && !(cntrl_flags & UPL_WILL_MODIFY)) {
- /*
+ dst_page->vmp_restart = FALSE;
+ if (!dst_page->vmp_absent && !(cntrl_flags & UPL_WILL_MODIFY)) {
+ /*
* expect the page to be used
*/
dwp->dw_mask |= DW_set_reference;
}
if (cntrl_flags & UPL_PRECIOUS) {
- if (dst_page->object->internal) {
+ if (object->internal) {
SET_PAGE_DIRTY(dst_page, FALSE);
- dst_page->precious = FALSE;
+ dst_page->vmp_precious = FALSE;
} else {
- dst_page->precious = TRUE;
+ dst_page->vmp_precious = TRUE;
}
} else {
- dst_page->precious = FALSE;
+ dst_page->vmp_precious = FALSE;
}
}
- if (dst_page->busy)
+ if (dst_page->vmp_busy) {
upl->flags |= UPL_HAS_BUSY;
+ }
- if (dst_page->phys_page > upl->highest_page)
- upl->highest_page = dst_page->phys_page;
+ if (phys_page > upl->highest_page) {
+ upl->highest_page = phys_page;
+ }
+ assert(!pmap_is_noencrypt(phys_page));
if (user_page_list) {
- user_page_list[entry].phys_addr = dst_page->phys_page;
- user_page_list[entry].pageout = dst_page->pageout;
- user_page_list[entry].absent = dst_page->absent;
- user_page_list[entry].dirty = dst_page->dirty;
- user_page_list[entry].precious = dst_page->precious;
- user_page_list[entry].device = FALSE;
+ user_page_list[entry].phys_addr = phys_page;
+ user_page_list[entry].free_when_done = dst_page->vmp_free_when_done;
+ user_page_list[entry].absent = dst_page->vmp_absent;
+ user_page_list[entry].dirty = dst_page->vmp_dirty;
+ user_page_list[entry].precious = dst_page->vmp_precious;
+ user_page_list[entry].device = FALSE;
user_page_list[entry].needed = FALSE;
- if (dst_page->clustered == TRUE)
- user_page_list[entry].speculative = dst_page->speculative;
- else
- user_page_list[entry].speculative = FALSE;
- user_page_list[entry].cs_validated = dst_page->cs_validated;
- user_page_list[entry].cs_tainted = dst_page->cs_tainted;
- }
- /*
+ if (dst_page->vmp_clustered == TRUE) {
+ user_page_list[entry].speculative = (dst_page->vmp_q_state == VM_PAGE_ON_SPECULATIVE_Q) ? TRUE : FALSE;
+ } else {
+ user_page_list[entry].speculative = FALSE;
+ }
+ user_page_list[entry].cs_validated = dst_page->vmp_cs_validated;
+ user_page_list[entry].cs_tainted = dst_page->vmp_cs_tainted;
+ user_page_list[entry].cs_nx = dst_page->vmp_cs_nx;
+ user_page_list[entry].mark = FALSE;
+ }
+ /*
* if UPL_RET_ONLY_ABSENT is set, then
* we are working with a fresh page and we've
* just set the clustered flag on it to
* indicate that it was drug in as part of a
* speculative cluster... so leave it alone
*/
- if ( !(cntrl_flags & UPL_RET_ONLY_ABSENT)) {
- /*
+ if (!(cntrl_flags & UPL_RET_ONLY_ABSENT)) {
+ /*
* someone is explicitly grabbing this page...
* update clustered and speculative state
- *
+ *
*/
- VM_PAGE_CONSUME_CLUSTERED(dst_page);
+ if (dst_page->vmp_clustered) {
+ VM_PAGE_CONSUME_CLUSTERED(dst_page);
+ }
}
try_next_page:
if (dwp->dw_mask) {
- if (dwp->dw_mask & DW_vm_page_activate)
+ if (dwp->dw_mask & DW_vm_page_activate) {
VM_STAT_INCR(reactivations);
+ }
VM_PAGE_ADD_DELAYED_WORK(dwp, dst_page, dw_count);
if (dw_count >= dw_limit) {
- vm_page_do_delayed_work(object, &dw_array[0], dw_count);
+ vm_page_do_delayed_work(object, tag, dwp_start, dw_count);
- dwp = &dw_array[0];
+ dwp = dwp_start;
dw_count = 0;
}
}
dst_offset += PAGE_SIZE_64;
xfer_size -= PAGE_SIZE;
}
- if (dw_count)
- vm_page_do_delayed_work(object, &dw_array[0], dw_count);
+ if (dw_count) {
+ vm_page_do_delayed_work(object, tag, dwp_start, dw_count);
+ dwp = dwp_start;
+ dw_count = 0;
+ }
if (alias_page != NULL) {
VM_PAGE_FREE(alias_page);
}
+ if (pmap_flushes_delayed == TRUE) {
+ pmap_flush(&pmap_flush_context_storage);
+ }
if (page_list_count != NULL) {
- if (upl->flags & UPL_INTERNAL)
+ if (upl->flags & UPL_INTERNAL) {
*page_list_count = 0;
- else if (*page_list_count > entry)
+ } else if (*page_list_count > entry) {
*page_list_count = entry;
+ }
}
#if UPL_DEBUG
upl->upl_state = 1;
#endif
vm_object_unlock(object);
- return KERN_SUCCESS;
-}
-
-/* JMM - Backward compatability for now */
-kern_return_t
-vm_fault_list_request( /* forward */
- memory_object_control_t control,
- vm_object_offset_t offset,
- upl_size_t size,
- upl_t *upl_ptr,
- upl_page_info_t **user_page_list_ptr,
- unsigned int page_list_count,
- int cntrl_flags);
-kern_return_t
-vm_fault_list_request(
- memory_object_control_t control,
- vm_object_offset_t offset,
- upl_size_t size,
- upl_t *upl_ptr,
- upl_page_info_t **user_page_list_ptr,
- unsigned int page_list_count,
- int cntrl_flags)
-{
- unsigned int local_list_count;
- upl_page_info_t *user_page_list;
- kern_return_t kr;
-
- if((cntrl_flags & UPL_VECTOR)==UPL_VECTOR)
- return KERN_INVALID_ARGUMENT;
-
- if (user_page_list_ptr != NULL) {
- local_list_count = page_list_count;
- user_page_list = *user_page_list_ptr;
- } else {
- local_list_count = 0;
- user_page_list = NULL;
- }
- kr = memory_object_upl_request(control,
- offset,
- size,
- upl_ptr,
- user_page_list,
- &local_list_count,
- cntrl_flags);
-
- if(kr != KERN_SUCCESS)
- return kr;
+ VM_DEBUG_CONSTANT_EVENT(vm_object_upl_request, VM_UPL_REQUEST, DBG_FUNC_END, page_grab_count, 0, 0, 0);
+#if DEVELOPMENT || DEBUG
+ if (task != NULL) {
+ ledger_credit(task->ledger, task_ledgers.pages_grabbed_upl, page_grab_count);
+ }
+#endif /* DEVELOPMENT || DEBUG */
- if ((user_page_list_ptr != NULL) && (cntrl_flags & UPL_INTERNAL)) {
- *user_page_list_ptr = UPL_GET_INTERNAL_PAGE_LIST(*upl_ptr);
+ if (dwp_start && dwp_finish_ctx) {
+ vm_page_delayed_work_finish_ctx(dwp_start);
+ dwp_start = dwp = NULL;
}
return KERN_SUCCESS;
}
-
-
-/*
+/*
* Routine: vm_object_super_upl_request
- * Purpose:
+ * Purpose:
* Cause the population of a portion of a vm_object
* in much the same way as memory_object_upl_request.
* Depending on the nature of the request, the pages
__private_extern__ kern_return_t
vm_object_super_upl_request(
vm_object_t object,
- vm_object_offset_t offset,
- upl_size_t size,
- upl_size_t super_cluster,
- upl_t *upl,
- upl_page_info_t *user_page_list,
- unsigned int *page_list_count,
- int cntrl_flags)
+ vm_object_offset_t offset,
+ upl_size_t size,
+ upl_size_t super_cluster,
+ upl_t *upl,
+ upl_page_info_t *user_page_list,
+ unsigned int *page_list_count,
+ upl_control_flags_t cntrl_flags,
+ vm_tag_t tag)
{
- if (object->paging_offset > offset || ((cntrl_flags & UPL_VECTOR)==UPL_VECTOR))
+ if (object->paging_offset > offset || ((cntrl_flags & UPL_VECTOR) == UPL_VECTOR)) {
return KERN_FAILURE;
+ }
assert(object->paging_in_progress);
offset = offset - object->paging_offset;
if (super_cluster > size) {
-
- vm_object_offset_t base_offset;
- upl_size_t super_size;
- vm_object_size_t super_size_64;
+ vm_object_offset_t base_offset;
+ upl_size_t super_size;
+ vm_object_size_t super_size_64;
base_offset = (offset & ~((vm_object_offset_t) super_cluster - 1));
- super_size = (offset + size) > (base_offset + super_cluster) ? super_cluster<<1 : super_cluster;
+ super_size = (offset + size) > (base_offset + super_cluster) ? super_cluster << 1 : super_cluster;
super_size_64 = ((base_offset + super_size) > object->vo_size) ? (object->vo_size - base_offset) : super_size;
super_size = (upl_size_t) super_size_64;
assert(super_size == super_size_64);
if (offset > (base_offset + super_size)) {
- panic("vm_object_super_upl_request: Missed target pageout"
- " %#llx,%#llx, %#x, %#x, %#x, %#llx\n",
- offset, base_offset, super_size, super_cluster,
- size, object->paging_offset);
+ panic("vm_object_super_upl_request: Missed target pageout"
+ " %#llx,%#llx, %#x, %#x, %#x, %#llx\n",
+ offset, base_offset, super_size, super_cluster,
+ size, object->paging_offset);
}
/*
* apparently there is a case where the vm requests a
* object size
*/
if ((offset + size) > (base_offset + super_size)) {
- super_size_64 = (offset + size) - base_offset;
+ super_size_64 = (offset + size) - base_offset;
super_size = (upl_size_t) super_size_64;
assert(super_size == super_size_64);
}
offset = base_offset;
size = super_size;
}
- return vm_object_upl_request(object, offset, size, upl, user_page_list, page_list_count, cntrl_flags);
+ return vm_object_upl_request(object, offset, size, upl, user_page_list, page_list_count, cntrl_flags, tag);
}
+int cs_executable_create_upl = 0;
+extern int proc_selfpid(void);
+extern char *proc_name_address(void *p);
kern_return_t
vm_map_create_upl(
- vm_map_t map,
- vm_map_address_t offset,
- upl_size_t *upl_size,
- upl_t *upl,
- upl_page_info_array_t page_list,
- unsigned int *count,
- int *flags)
+ vm_map_t map,
+ vm_map_address_t offset,
+ upl_size_t *upl_size,
+ upl_t *upl,
+ upl_page_info_array_t page_list,
+ unsigned int *count,
+ upl_control_flags_t *flags,
+ vm_tag_t tag)
{
- vm_map_entry_t entry;
- int caller_flags;
- int force_data_sync;
- int sync_cow_data;
- vm_object_t local_object;
- vm_map_offset_t local_offset;
- vm_map_offset_t local_start;
- kern_return_t ret;
+ vm_map_entry_t entry;
+ upl_control_flags_t caller_flags;
+ int force_data_sync;
+ int sync_cow_data;
+ vm_object_t local_object;
+ vm_map_offset_t local_offset;
+ vm_map_offset_t local_start;
+ kern_return_t ret;
+ vm_map_address_t original_offset;
+ vm_map_size_t original_size, adjusted_size;
+ vm_map_offset_t local_entry_start;
+ vm_object_offset_t local_entry_offset;
+ vm_object_offset_t offset_in_mapped_page;
+ boolean_t release_map = FALSE;
+
+start_with_map:
+
+ original_offset = offset;
+ original_size = *upl_size;
+ adjusted_size = original_size;
caller_flags = *flags;
* For forward compatibility's sake,
* reject any unknown flag.
*/
- return KERN_INVALID_VALUE;
+ ret = KERN_INVALID_VALUE;
+ goto done;
}
force_data_sync = (caller_flags & UPL_FORCE_DATA_SYNC);
sync_cow_data = !(caller_flags & UPL_COPYOUT_FROM);
- if (upl == NULL)
- return KERN_INVALID_ARGUMENT;
+ if (upl == NULL) {
+ ret = KERN_INVALID_ARGUMENT;
+ goto done;
+ }
REDISCOVER_ENTRY:
vm_map_lock_read(map);
- if (vm_map_lookup_entry(map, offset, &entry)) {
+ if (!vm_map_lookup_entry(map, offset, &entry)) {
+ vm_map_unlock_read(map);
+ ret = KERN_FAILURE;
+ goto done;
+ }
- if ((entry->vme_end - offset) < *upl_size) {
- *upl_size = (upl_size_t) (entry->vme_end - offset);
- assert(*upl_size == entry->vme_end - offset);
- }
+ local_entry_start = entry->vme_start;
+ local_entry_offset = VME_OFFSET(entry);
- if (caller_flags & UPL_QUERY_OBJECT_TYPE) {
- *flags = 0;
+ if (VM_MAP_PAGE_SHIFT(map) < PAGE_SHIFT) {
+ DEBUG4K_UPL("map %p (%d) offset 0x%llx size 0x%x flags 0x%llx\n", map, VM_MAP_PAGE_SHIFT(map), (uint64_t)offset, *upl_size, *flags);
+ }
+
+ if (entry->vme_end - original_offset < adjusted_size) {
+ adjusted_size = entry->vme_end - original_offset;
+ assert(adjusted_size > 0);
+ *upl_size = (upl_size_t) adjusted_size;
+ assert(*upl_size == adjusted_size);
+ }
- if ( !entry->is_sub_map && entry->object.vm_object != VM_OBJECT_NULL) {
- if (entry->object.vm_object->private)
- *flags = UPL_DEV_MEMORY;
+ if (caller_flags & UPL_QUERY_OBJECT_TYPE) {
+ *flags = 0;
- if (entry->object.vm_object->phys_contiguous)
- *flags |= UPL_PHYS_CONTIG;
+ if (!entry->is_sub_map &&
+ VME_OBJECT(entry) != VM_OBJECT_NULL) {
+ if (VME_OBJECT(entry)->private) {
+ *flags = UPL_DEV_MEMORY;
}
- vm_map_unlock_read(map);
- return KERN_SUCCESS;
+ if (VME_OBJECT(entry)->phys_contiguous) {
+ *flags |= UPL_PHYS_CONTIG;
+ }
}
+ vm_map_unlock_read(map);
+ ret = KERN_SUCCESS;
+ goto done;
+ }
- if (entry->is_sub_map) {
- vm_map_t submap;
-
- submap = entry->object.sub_map;
- local_start = entry->vme_start;
- local_offset = entry->offset;
+ offset_in_mapped_page = 0;
+ if (VM_MAP_PAGE_SIZE(map) < PAGE_SIZE) {
+ offset = vm_map_trunc_page(original_offset, VM_MAP_PAGE_MASK(map));
+ *upl_size = (upl_size_t)
+ (vm_map_round_page(original_offset + adjusted_size,
+ VM_MAP_PAGE_MASK(map))
+ - offset);
- vm_map_reference(submap);
- vm_map_unlock_read(map);
+ offset_in_mapped_page = original_offset - offset;
+ assert(offset_in_mapped_page < VM_MAP_PAGE_SIZE(map));
- ret = vm_map_create_upl(submap,
- local_offset + (offset - local_start),
- upl_size, upl, page_list, count, flags);
- vm_map_deallocate(submap);
+ DEBUG4K_UPL("map %p (%d) offset 0x%llx size 0x%llx flags 0x%llx -> offset 0x%llx adjusted_size 0x%llx *upl_size 0x%x offset_in_mapped_page 0x%llx\n", map, VM_MAP_PAGE_SHIFT(map), (uint64_t)original_offset, (uint64_t)original_size, *flags, (uint64_t)offset, (uint64_t)adjusted_size, *upl_size, offset_in_mapped_page);
+ }
- return ret;
+ if (VME_OBJECT(entry) == VM_OBJECT_NULL ||
+ !VME_OBJECT(entry)->phys_contiguous) {
+ if (*upl_size > MAX_UPL_SIZE_BYTES) {
+ *upl_size = MAX_UPL_SIZE_BYTES;
}
+ }
- if (entry->object.vm_object == VM_OBJECT_NULL || !entry->object.vm_object->phys_contiguous) {
- if ((*upl_size/PAGE_SIZE) > MAX_UPL_SIZE)
- *upl_size = MAX_UPL_SIZE * PAGE_SIZE;
+ /*
+ * Create an object if necessary.
+ */
+ if (VME_OBJECT(entry) == VM_OBJECT_NULL) {
+ if (vm_map_lock_read_to_write(map)) {
+ goto REDISCOVER_ENTRY;
}
+
+ VME_OBJECT_SET(entry,
+ vm_object_allocate((vm_size_t)
+ vm_object_round_page((entry->vme_end - entry->vme_start))));
+ VME_OFFSET_SET(entry, 0);
+ assert(entry->use_pmap);
+
+ vm_map_lock_write_to_read(map);
+ }
+
+ if (!(caller_flags & UPL_COPYOUT_FROM) &&
+ !entry->is_sub_map &&
+ !(entry->protection & VM_PROT_WRITE)) {
+ vm_map_unlock_read(map);
+ ret = KERN_PROTECTION_FAILURE;
+ goto done;
+ }
+
+#if CONFIG_EMBEDDED
+ if (map->pmap != kernel_pmap &&
+ (caller_flags & UPL_COPYOUT_FROM) &&
+ (entry->protection & VM_PROT_EXECUTE) &&
+ !(entry->protection & VM_PROT_WRITE)) {
+ vm_offset_t kaddr;
+ vm_size_t ksize;
+
/*
- * Create an object if necessary.
+ * We're about to create a read-only UPL backed by
+ * memory from an executable mapping.
+ * Wiring the pages would result in the pages being copied
+ * (due to the "MAP_PRIVATE" mapping) and no longer
+ * code-signed, so no longer eligible for execution.
+ * Instead, let's copy the data into a kernel buffer and
+ * create the UPL from this kernel buffer.
+ * The kernel buffer is then freed, leaving the UPL holding
+ * the last reference on the VM object, so the memory will
+ * be released when the UPL is committed.
*/
- if (entry->object.vm_object == VM_OBJECT_NULL) {
- if (vm_map_lock_read_to_write(map))
- goto REDISCOVER_ENTRY;
+ vm_map_unlock_read(map);
+ entry = VM_MAP_ENTRY_NULL;
+ /* allocate kernel buffer */
+ ksize = round_page(*upl_size);
+ kaddr = 0;
+ ret = kmem_alloc_pageable(kernel_map,
+ &kaddr,
+ ksize,
+ tag);
+ if (ret == KERN_SUCCESS) {
+ /* copyin the user data */
+ ret = copyinmap(map, offset, (void *)kaddr, *upl_size);
+ }
+ if (ret == KERN_SUCCESS) {
+ if (ksize > *upl_size) {
+ /* zero out the extra space in kernel buffer */
+ memset((void *)(kaddr + *upl_size),
+ 0,
+ ksize - *upl_size);
+ }
+ /* create the UPL from the kernel buffer */
+ vm_object_offset_t offset_in_object;
+ vm_object_offset_t offset_in_object_page;
+
+ offset_in_object = offset - local_entry_start + local_entry_offset;
+ offset_in_object_page = offset_in_object - vm_object_trunc_page(offset_in_object);
+ assert(offset_in_object_page < PAGE_SIZE);
+ assert(offset_in_object_page + offset_in_mapped_page < PAGE_SIZE);
+ *upl_size -= offset_in_object_page + offset_in_mapped_page;
+ ret = vm_map_create_upl(kernel_map,
+ (vm_map_address_t)(kaddr + offset_in_object_page + offset_in_mapped_page),
+ upl_size, upl, page_list, count, flags, tag);
+ }
+ if (kaddr != 0) {
+ /* free the kernel buffer */
+ kmem_free(kernel_map, kaddr, ksize);
+ kaddr = 0;
+ ksize = 0;
+ }
+#if DEVELOPMENT || DEBUG
+ DTRACE_VM4(create_upl_from_executable,
+ vm_map_t, map,
+ vm_map_address_t, offset,
+ upl_size_t, *upl_size,
+ kern_return_t, ret);
+#endif /* DEVELOPMENT || DEBUG */
+ goto done;
+ }
+#endif /* CONFIG_EMBEDDED */
+
+ local_object = VME_OBJECT(entry);
+ assert(local_object != VM_OBJECT_NULL);
+
+ if (!entry->is_sub_map &&
+ !entry->needs_copy &&
+ *upl_size != 0 &&
+ local_object->vo_size > *upl_size && /* partial UPL */
+ entry->wired_count == 0 && /* No COW for entries that are wired */
+ (map->pmap != kernel_pmap) && /* alias checks */
+ (vm_map_entry_should_cow_for_true_share(entry) /* case 1 */
+ ||
+ ( /* case 2 */
+ local_object->internal &&
+ (local_object->copy_strategy == MEMORY_OBJECT_COPY_SYMMETRIC) &&
+ local_object->ref_count > 1))) {
+ vm_prot_t prot;
- entry->object.vm_object = vm_object_allocate((vm_size_t)(entry->vme_end - entry->vme_start));
- entry->offset = 0;
+ /*
+ * Case 1:
+ * Set up the targeted range for copy-on-write to avoid
+ * applying true_share/copy_delay to the entire object.
+ *
+ * Case 2:
+ * This map entry covers only part of an internal
+ * object. There could be other map entries covering
+ * other areas of this object and some of these map
+ * entries could be marked as "needs_copy", which
+ * assumes that the object is COPY_SYMMETRIC.
+ * To avoid marking this object as COPY_DELAY and
+ * "true_share", let's shadow it and mark the new
+ * (smaller) object as "true_share" and COPY_DELAY.
+ */
- vm_map_lock_write_to_read(map);
+ if (vm_map_lock_read_to_write(map)) {
+ goto REDISCOVER_ENTRY;
+ }
+ vm_map_lock_assert_exclusive(map);
+ assert(VME_OBJECT(entry) == local_object);
+
+ vm_map_clip_start(map,
+ entry,
+ vm_map_trunc_page(offset,
+ VM_MAP_PAGE_MASK(map)));
+ vm_map_clip_end(map,
+ entry,
+ vm_map_round_page(offset + *upl_size,
+ VM_MAP_PAGE_MASK(map)));
+ if ((entry->vme_end - offset) < *upl_size) {
+ *upl_size = (upl_size_t) (entry->vme_end - offset);
+ assert(*upl_size == entry->vme_end - offset);
}
- if (!(caller_flags & UPL_COPYOUT_FROM)) {
- if (!(entry->protection & VM_PROT_WRITE)) {
- vm_map_unlock_read(map);
- return KERN_PROTECTION_FAILURE;
- }
-
- local_object = entry->object.vm_object;
- if (vm_map_entry_should_cow_for_true_share(entry) &&
- local_object->vo_size > *upl_size &&
- *upl_size != 0) {
- vm_prot_t prot;
- /*
- * Set up the targeted range for copy-on-write to avoid
- * applying true_share/copy_delay to the entire object.
- */
+ prot = entry->protection & ~VM_PROT_WRITE;
+ if (override_nx(map, VME_ALIAS(entry)) && prot) {
+ prot |= VM_PROT_EXECUTE;
+ }
+ vm_object_pmap_protect(local_object,
+ VME_OFFSET(entry),
+ entry->vme_end - entry->vme_start,
+ ((entry->is_shared ||
+ map->mapped_in_other_pmaps)
+ ? PMAP_NULL
+ : map->pmap),
+ VM_MAP_PAGE_SIZE(map),
+ entry->vme_start,
+ prot);
- if (vm_map_lock_read_to_write(map)) {
- goto REDISCOVER_ENTRY;
- }
+ assert(entry->wired_count == 0);
- vm_map_clip_start(map,
- entry,
- vm_map_trunc_page(offset,
- VM_MAP_PAGE_MASK(map)));
- vm_map_clip_end(map,
- entry,
- vm_map_round_page(offset + *upl_size,
- VM_MAP_PAGE_MASK(map)));
- prot = entry->protection & ~VM_PROT_WRITE;
- if (override_nx(map, entry->alias) && prot)
- prot |= VM_PROT_EXECUTE;
- vm_object_pmap_protect(local_object,
- entry->offset,
- entry->vme_end - entry->vme_start,
- ((entry->is_shared || map->mapped_in_other_pmaps)
- ? PMAP_NULL
- : map->pmap),
- entry->vme_start,
- prot);
- entry->needs_copy = TRUE;
-
- vm_map_lock_write_to_read(map);
- }
-
- if (entry->needs_copy) {
- /*
- * Honor copy-on-write for COPY_SYMMETRIC
- * strategy.
- */
- vm_map_t local_map;
- vm_object_t object;
- vm_object_offset_t new_offset;
- vm_prot_t prot;
- boolean_t wired;
- vm_map_version_t version;
- vm_map_t real_map;
-
- local_map = map;
-
- if (vm_map_lookup_locked(&local_map,
- offset, VM_PROT_WRITE,
- OBJECT_LOCK_EXCLUSIVE,
- &version, &object,
- &new_offset, &prot, &wired,
- NULL,
- &real_map) != KERN_SUCCESS) {
- vm_map_unlock_read(local_map);
- return KERN_FAILURE;
- }
- if (real_map != map)
- vm_map_unlock(real_map);
- vm_map_unlock_read(local_map);
+ /*
+ * Lock the VM object and re-check its status: if it's mapped
+ * in another address space, we could still be racing with
+ * another thread holding that other VM map exclusively.
+ */
+ vm_object_lock(local_object);
+ if (local_object->true_share) {
+ /* object is already in proper state: no COW needed */
+ assert(local_object->copy_strategy !=
+ MEMORY_OBJECT_COPY_SYMMETRIC);
+ } else {
+ /* not true_share: ask for copy-on-write below */
+ assert(local_object->copy_strategy ==
+ MEMORY_OBJECT_COPY_SYMMETRIC);
+ entry->needs_copy = TRUE;
+ }
+ vm_object_unlock(local_object);
- vm_object_unlock(object);
+ vm_map_lock_write_to_read(map);
+ }
+ if (entry->needs_copy) {
+ /*
+ * Honor copy-on-write for COPY_SYMMETRIC
+ * strategy.
+ */
+ vm_map_t local_map;
+ vm_object_t object;
+ vm_object_offset_t new_offset;
+ vm_prot_t prot;
+ boolean_t wired;
+ vm_map_version_t version;
+ vm_map_t real_map;
+ vm_prot_t fault_type;
+
+ if (entry->vme_start < VM_MAP_TRUNC_PAGE(offset, VM_MAP_PAGE_MASK(map)) ||
+ entry->vme_end > VM_MAP_ROUND_PAGE(offset + *upl_size, VM_MAP_PAGE_MASK(map))) {
+ /*
+ * Clip the requested range first to minimize the
+ * amount of potential copying...
+ */
+ if (vm_map_lock_read_to_write(map)) {
goto REDISCOVER_ENTRY;
}
+ vm_map_lock_assert_exclusive(map);
+ assert(VME_OBJECT(entry) == local_object);
+ vm_map_clip_start(map, entry,
+ VM_MAP_TRUNC_PAGE(offset, VM_MAP_PAGE_MASK(map)));
+ vm_map_clip_end(map, entry,
+ VM_MAP_ROUND_PAGE(offset + *upl_size, VM_MAP_PAGE_MASK(map)));
+ vm_map_lock_write_to_read(map);
}
- if (sync_cow_data) {
- if (entry->object.vm_object->shadow || entry->object.vm_object->copy) {
- local_object = entry->object.vm_object;
- local_start = entry->vme_start;
- local_offset = entry->offset;
-
- vm_object_reference(local_object);
- vm_map_unlock_read(map);
-
- if (local_object->shadow && local_object->copy) {
- vm_object_lock_request(
- local_object->shadow,
- (vm_object_offset_t)
- ((offset - local_start) +
- local_offset) +
- local_object->vo_shadow_offset,
- *upl_size, FALSE,
- MEMORY_OBJECT_DATA_SYNC,
- VM_PROT_NO_CHANGE);
- }
- sync_cow_data = FALSE;
- vm_object_deallocate(local_object);
- goto REDISCOVER_ENTRY;
+ local_map = map;
+
+ if (caller_flags & UPL_COPYOUT_FROM) {
+ fault_type = VM_PROT_READ | VM_PROT_COPY;
+ vm_counters.create_upl_extra_cow++;
+ vm_counters.create_upl_extra_cow_pages +=
+ (entry->vme_end - entry->vme_start) / PAGE_SIZE;
+ } else {
+ fault_type = VM_PROT_WRITE;
+ }
+ if (vm_map_lookup_locked(&local_map,
+ offset, fault_type,
+ OBJECT_LOCK_EXCLUSIVE,
+ &version, &object,
+ &new_offset, &prot, &wired,
+ NULL,
+ &real_map, NULL) != KERN_SUCCESS) {
+ if (fault_type == VM_PROT_WRITE) {
+ vm_counters.create_upl_lookup_failure_write++;
+ } else {
+ vm_counters.create_upl_lookup_failure_copy++;
}
+ vm_map_unlock_read(local_map);
+ ret = KERN_FAILURE;
+ goto done;
}
- if (force_data_sync) {
- local_object = entry->object.vm_object;
- local_start = entry->vme_start;
- local_offset = entry->offset;
+ if (real_map != local_map) {
+ vm_map_unlock(real_map);
+ }
+ vm_map_unlock_read(local_map);
- vm_object_reference(local_object);
- vm_map_unlock_read(map);
+ vm_object_unlock(object);
- vm_object_lock_request(
- local_object,
- (vm_object_offset_t)
- ((offset - local_start) + local_offset),
- (vm_object_size_t)*upl_size, FALSE,
- MEMORY_OBJECT_DATA_SYNC,
- VM_PROT_NO_CHANGE);
+ goto REDISCOVER_ENTRY;
+ }
- force_data_sync = FALSE;
- vm_object_deallocate(local_object);
+ if (entry->is_sub_map) {
+ vm_map_t submap;
- goto REDISCOVER_ENTRY;
+ submap = VME_SUBMAP(entry);
+ local_start = entry->vme_start;
+ local_offset = (vm_map_offset_t)VME_OFFSET(entry);
+
+ vm_map_reference(submap);
+ vm_map_unlock_read(map);
+
+ DEBUG4K_UPL("map %p offset 0x%llx (0x%llx) size 0x%x (adjusted 0x%llx original 0x%llx) offset_in_mapped_page 0x%llx submap %p\n", map, (uint64_t)offset, (uint64_t)original_offset, *upl_size, (uint64_t)adjusted_size, (uint64_t)original_size, offset_in_mapped_page, submap);
+ offset += offset_in_mapped_page;
+ *upl_size -= offset_in_mapped_page;
+
+ if (release_map) {
+ vm_map_deallocate(map);
}
- if (entry->object.vm_object->private)
- *flags = UPL_DEV_MEMORY;
- else
- *flags = 0;
+ map = submap;
+ release_map = TRUE;
+ offset = local_offset + (offset - local_start);
+ goto start_with_map;
+ }
+
+ if (sync_cow_data &&
+ (VME_OBJECT(entry)->shadow ||
+ VME_OBJECT(entry)->copy)) {
+ local_object = VME_OBJECT(entry);
+ local_start = entry->vme_start;
+ local_offset = (vm_map_offset_t)VME_OFFSET(entry);
- if (entry->object.vm_object->phys_contiguous)
- *flags |= UPL_PHYS_CONTIG;
+ vm_object_reference(local_object);
+ vm_map_unlock_read(map);
+
+ if (local_object->shadow && local_object->copy) {
+ vm_object_lock_request(local_object->shadow,
+ ((vm_object_offset_t)
+ ((offset - local_start) +
+ local_offset) +
+ local_object->vo_shadow_offset),
+ *upl_size, FALSE,
+ MEMORY_OBJECT_DATA_SYNC,
+ VM_PROT_NO_CHANGE);
+ }
+ sync_cow_data = FALSE;
+ vm_object_deallocate(local_object);
- local_object = entry->object.vm_object;
- local_offset = entry->offset;
+ goto REDISCOVER_ENTRY;
+ }
+ if (force_data_sync) {
+ local_object = VME_OBJECT(entry);
local_start = entry->vme_start;
+ local_offset = (vm_map_offset_t)VME_OFFSET(entry);
vm_object_reference(local_object);
vm_map_unlock_read(map);
- ret = vm_object_iopl_request(local_object,
- (vm_object_offset_t) ((offset - local_start) + local_offset),
- *upl_size,
- upl,
- page_list,
- count,
- caller_flags);
+ vm_object_lock_request(local_object,
+ ((vm_object_offset_t)
+ ((offset - local_start) +
+ local_offset)),
+ (vm_object_size_t)*upl_size,
+ FALSE,
+ MEMORY_OBJECT_DATA_SYNC,
+ VM_PROT_NO_CHANGE);
+
+ force_data_sync = FALSE;
vm_object_deallocate(local_object);
- return(ret);
- }
+ goto REDISCOVER_ENTRY;
+ }
+ if (VME_OBJECT(entry)->private) {
+ *flags = UPL_DEV_MEMORY;
+ } else {
+ *flags = 0;
+ }
+
+ if (VME_OBJECT(entry)->phys_contiguous) {
+ *flags |= UPL_PHYS_CONTIG;
+ }
+
+ local_object = VME_OBJECT(entry);
+ local_offset = (vm_map_offset_t)VME_OFFSET(entry);
+ local_start = entry->vme_start;
+
+ /*
+ * Wiring will copy the pages to the shadow object.
+ * The shadow object will not be code-signed so
+ * attempting to execute code from these copied pages
+ * would trigger a code-signing violation.
+ */
+ if (entry->protection & VM_PROT_EXECUTE) {
+#if MACH_ASSERT
+ printf("pid %d[%s] create_upl out of executable range from "
+ "0x%llx to 0x%llx: side effects may include "
+ "code-signing violations later on\n",
+ proc_selfpid(),
+ (current_task()->bsd_info
+ ? proc_name_address(current_task()->bsd_info)
+ : "?"),
+ (uint64_t) entry->vme_start,
+ (uint64_t) entry->vme_end);
+#endif /* MACH_ASSERT */
+ DTRACE_VM2(cs_executable_create_upl,
+ uint64_t, (uint64_t)entry->vme_start,
+ uint64_t, (uint64_t)entry->vme_end);
+ cs_executable_create_upl++;
+ }
+
+ vm_object_lock(local_object);
+
+ /*
+ * Ensure that this object is "true_share" and "copy_delay" now,
+ * while we're still holding the VM map lock. After we unlock the map,
+ * anything could happen to that mapping, including some copy-on-write
+ * activity. We need to make sure that the IOPL will point at the
+ * same memory as the mapping.
+ */
+ if (local_object->true_share) {
+ assert(local_object->copy_strategy !=
+ MEMORY_OBJECT_COPY_SYMMETRIC);
+ } else if (local_object != kernel_object &&
+ local_object != compressor_object &&
+ !local_object->phys_contiguous) {
+#if VM_OBJECT_TRACKING_OP_TRUESHARE
+ if (!local_object->true_share &&
+ vm_object_tracking_inited) {
+ void *bt[VM_OBJECT_TRACKING_BTDEPTH];
+ int num = 0;
+ num = OSBacktrace(bt,
+ VM_OBJECT_TRACKING_BTDEPTH);
+ btlog_add_entry(vm_object_tracking_btlog,
+ local_object,
+ VM_OBJECT_TRACKING_OP_TRUESHARE,
+ bt,
+ num);
+ }
+#endif /* VM_OBJECT_TRACKING_OP_TRUESHARE */
+ local_object->true_share = TRUE;
+ if (local_object->copy_strategy ==
+ MEMORY_OBJECT_COPY_SYMMETRIC) {
+ local_object->copy_strategy = MEMORY_OBJECT_COPY_DELAY;
+ }
+ }
+
+ vm_object_reference_locked(local_object);
+ vm_object_unlock(local_object);
+
vm_map_unlock_read(map);
- return(KERN_FAILURE);
+ offset += offset_in_mapped_page;
+ assert(*upl_size > offset_in_mapped_page);
+ *upl_size -= offset_in_mapped_page;
+
+ ret = vm_object_iopl_request(local_object,
+ ((vm_object_offset_t)
+ ((offset - local_start) + local_offset)),
+ *upl_size,
+ upl,
+ page_list,
+ count,
+ caller_flags,
+ tag);
+ vm_object_deallocate(local_object);
+
+done:
+ if (release_map) {
+ vm_map_deallocate(map);
+ }
+
+ return ret;
}
/*
* Internal routine to enter a UPL into a VM map.
- *
+ *
* JMM - This should just be doable through the standard
* vm_map_enter() API.
*/
kern_return_t
vm_map_enter_upl(
- vm_map_t map,
- upl_t upl,
- vm_map_offset_t *dst_addr)
+ vm_map_t map,
+ upl_t upl,
+ vm_map_offset_t *dst_addr)
{
- vm_map_size_t size;
- vm_object_offset_t offset;
- vm_map_offset_t addr;
- vm_page_t m;
- kern_return_t kr;
- int isVectorUPL = 0, curr_upl=0;
- upl_t vector_upl = NULL;
- vm_offset_t vector_upl_dst_addr = 0;
- vm_map_t vector_upl_submap = NULL;
- upl_offset_t subupl_offset = 0;
- upl_size_t subupl_size = 0;
-
- if (upl == UPL_NULL)
+ vm_map_size_t size;
+ vm_object_offset_t offset;
+ vm_map_offset_t addr;
+ vm_page_t m;
+ kern_return_t kr;
+ int isVectorUPL = 0, curr_upl = 0;
+ upl_t vector_upl = NULL;
+ vm_offset_t vector_upl_dst_addr = 0;
+ vm_map_t vector_upl_submap = NULL;
+ upl_offset_t subupl_offset = 0;
+ upl_size_t subupl_size = 0;
+
+ if (upl == UPL_NULL) {
return KERN_INVALID_ARGUMENT;
+ }
- if((isVectorUPL = vector_upl_is_valid(upl))) {
- int mapped=0,valid_upls=0;
+ DEBUG4K_UPL("map %p upl %p flags 0x%x object %p offset 0x%llx size 0x%x \n", map, upl, upl->flags, upl->map_object, upl->u_offset, upl->u_size);
+ assert(map == kernel_map);
+
+ if ((isVectorUPL = vector_upl_is_valid(upl))) {
+ int mapped = 0, valid_upls = 0;
vector_upl = upl;
upl_lock(vector_upl);
- for(curr_upl=0; curr_upl < MAX_VECTOR_UPL_ELEMENTS; curr_upl++) {
+ for (curr_upl = 0; curr_upl < MAX_VECTOR_UPL_ELEMENTS; curr_upl++) {
upl = vector_upl_subupl_byindex(vector_upl, curr_upl );
- if(upl == NULL)
+ if (upl == NULL) {
continue;
+ }
valid_upls++;
- if (UPL_PAGE_LIST_MAPPED & upl->flags)
+ if (UPL_PAGE_LIST_MAPPED & upl->flags) {
mapped++;
+ }
}
- if(mapped) {
- if(mapped != valid_upls)
+ if (mapped) {
+ if (mapped != valid_upls) {
panic("Only %d of the %d sub-upls within the Vector UPL are alread mapped\n", mapped, valid_upls);
- else {
+ } else {
upl_unlock(vector_upl);
return KERN_FAILURE;
}
}
- kr = kmem_suballoc(map, &vector_upl_dst_addr, vector_upl->size, FALSE, VM_FLAGS_ANYWHERE, &vector_upl_submap);
- if( kr != KERN_SUCCESS )
+ if (VM_MAP_PAGE_MASK(map) < PAGE_MASK) {
+ panic("TODO4K: vector UPL not implemented");
+ }
+
+ kr = kmem_suballoc(map, &vector_upl_dst_addr,
+ vector_upl->u_size,
+ FALSE,
+ VM_FLAGS_ANYWHERE, VM_MAP_KERNEL_FLAGS_NONE, VM_KERN_MEMORY_NONE,
+ &vector_upl_submap);
+ if (kr != KERN_SUCCESS) {
panic("Vector UPL submap allocation failed\n");
+ }
map = vector_upl_submap;
vector_upl_set_submap(vector_upl, vector_upl_submap, vector_upl_dst_addr);
- curr_upl=0;
- }
- else
+ curr_upl = 0;
+ } else {
upl_lock(upl);
+ }
process_upl_to_enter:
- if(isVectorUPL){
- if(curr_upl == MAX_VECTOR_UPL_ELEMENTS) {
+ if (isVectorUPL) {
+ if (curr_upl == MAX_VECTOR_UPL_ELEMENTS) {
*dst_addr = vector_upl_dst_addr;
upl_unlock(vector_upl);
return KERN_SUCCESS;
}
upl = vector_upl_subupl_byindex(vector_upl, curr_upl++ );
- if(upl == NULL)
+ if (upl == NULL) {
goto process_upl_to_enter;
+ }
vector_upl_get_iostate(vector_upl, upl, &subupl_offset, &subupl_size);
*dst_addr = (vm_map_offset_t)(vector_upl_dst_addr + (vm_map_offset_t)subupl_offset);
return KERN_FAILURE;
}
}
+
+ size = upl_adjusted_size(upl, VM_MAP_PAGE_MASK(map));
+
if ((!(upl->flags & UPL_SHADOWED)) &&
((upl->flags & UPL_HAS_BUSY) ||
- !((upl->flags & (UPL_DEVICE_MEMORY | UPL_IO_WIRE)) || (upl->map_object->phys_contiguous)))) {
-
- vm_object_t object;
- vm_page_t alias_page;
- vm_object_offset_t new_offset;
- unsigned int pg_num;
- wpl_array_t lite_list;
+ !((upl->flags & (UPL_DEVICE_MEMORY | UPL_IO_WIRE)) || (upl->map_object->phys_contiguous)))) {
+ vm_object_t object;
+ vm_page_t alias_page;
+ vm_object_offset_t new_offset;
+ unsigned int pg_num;
+ wpl_array_t lite_list;
if (upl->flags & UPL_INTERNAL) {
- lite_list = (wpl_array_t)
- ((((uintptr_t)upl) + sizeof(struct upl))
- + ((upl->size/PAGE_SIZE) * sizeof(upl_page_info_t)));
+ lite_list = (wpl_array_t)
+ ((((uintptr_t)upl) + sizeof(struct upl))
+ + ((size / PAGE_SIZE) * sizeof(upl_page_info_t)));
} else {
- lite_list = (wpl_array_t)(((uintptr_t)upl) + sizeof(struct upl));
+ lite_list = (wpl_array_t)(((uintptr_t)upl) + sizeof(struct upl));
}
object = upl->map_object;
- upl->map_object = vm_object_allocate(upl->size);
+ upl->map_object = vm_object_allocate(vm_object_round_page(size));
vm_object_lock(upl->map_object);
upl->map_object->pageout = TRUE;
upl->map_object->can_persist = FALSE;
upl->map_object->copy_strategy = MEMORY_OBJECT_COPY_NONE;
- upl->map_object->vo_shadow_offset = upl->offset - object->paging_offset;
+ upl->map_object->vo_shadow_offset = upl_adjusted_offset(upl, PAGE_MASK) - object->paging_offset;
+ assertf(page_aligned(upl->map_object->vo_shadow_offset),
+ "object %p shadow_offset 0x%llx",
+ upl->map_object,
+ (uint64_t)upl->map_object->vo_shadow_offset);
upl->map_object->wimg_bits = object->wimg_bits;
+ assertf(page_aligned(upl->map_object->vo_shadow_offset),
+ "object %p shadow_offset 0x%llx",
+ upl->map_object, upl->map_object->vo_shadow_offset);
offset = upl->map_object->vo_shadow_offset;
new_offset = 0;
- size = upl->size;
+ size = upl_adjusted_size(upl, VM_MAP_PAGE_MASK(map));
upl->flags |= UPL_SHADOWED;
pg_num = (unsigned int) (new_offset / PAGE_SIZE);
assert(pg_num == new_offset / PAGE_SIZE);
- if (lite_list[pg_num>>5] & (1 << (pg_num & 31))) {
-
+ if (lite_list[pg_num >> 5] & (1U << (pg_num & 31))) {
VM_PAGE_GRAB_FICTITIOUS(alias_page);
vm_object_lock(object);
m = vm_page_lookup(object, offset);
if (m == VM_PAGE_NULL) {
- panic("vm_upl_map: page missing\n");
+ panic("vm_upl_map: page missing\n");
}
/*
- * Convert the fictitious page to a private
+ * Convert the fictitious page to a private
* shadow of the real page.
*/
- assert(alias_page->fictitious);
- alias_page->fictitious = FALSE;
- alias_page->private = TRUE;
- alias_page->pageout = TRUE;
+ assert(alias_page->vmp_fictitious);
+ alias_page->vmp_fictitious = FALSE;
+ alias_page->vmp_private = TRUE;
+ alias_page->vmp_free_when_done = TRUE;
/*
* since m is a page in the upl it must
* already be wired or BUSY, so it's
* safe to assign the underlying physical
* page to the alias
*/
- alias_page->phys_page = m->phys_page;
+ VM_PAGE_SET_PHYS_PAGE(alias_page, VM_PAGE_GET_PHYS_PAGE(m));
- vm_object_unlock(object);
+ vm_object_unlock(object);
vm_page_lockspin_queues();
- vm_page_wire(alias_page);
+ vm_page_wire(alias_page, VM_KERN_MEMORY_NONE, TRUE);
vm_page_unlock_queues();
-
- /*
- * ENCRYPTED SWAP:
- * The virtual page ("m") has to be wired in some way
- * here or its physical page ("m->phys_page") could
- * be recycled at any time.
- * Assuming this is enforced by the caller, we can't
- * get an encrypted page here. Since the encryption
- * key depends on the VM page's "pager" object and
- * the "paging_offset", we couldn't handle 2 pageable
- * VM pages (with different pagers and paging_offsets)
- * sharing the same physical page: we could end up
- * encrypting with one key (via one VM page) and
- * decrypting with another key (via the alias VM page).
- */
- ASSERT_PAGE_DECRYPTED(m);
- vm_page_insert(alias_page, upl->map_object, new_offset);
+ vm_page_insert_wired(alias_page, upl->map_object, new_offset, VM_KERN_MEMORY_NONE);
- assert(!alias_page->wanted);
- alias_page->busy = FALSE;
- alias_page->absent = FALSE;
+ assert(!alias_page->vmp_wanted);
+ alias_page->vmp_busy = FALSE;
+ alias_page->vmp_absent = FALSE;
}
size -= PAGE_SIZE;
offset += PAGE_SIZE_64;
}
vm_object_unlock(upl->map_object);
}
- if (upl->flags & UPL_SHADOWED)
- offset = 0;
- else
- offset = upl->offset - upl->map_object->paging_offset;
+ if (upl->flags & UPL_SHADOWED) {
+ offset = 0;
+ } else {
+ offset = upl_adjusted_offset(upl, VM_MAP_PAGE_MASK(map)) - upl->map_object->paging_offset;
+ }
+
+ size = upl_adjusted_size(upl, VM_MAP_PAGE_MASK(map));
- size = upl->size;
-
vm_object_reference(upl->map_object);
- if(!isVectorUPL) {
+ if (!isVectorUPL) {
*dst_addr = 0;
/*
- * NEED A UPL_MAP ALIAS
- */
+ * NEED A UPL_MAP ALIAS
+ */
kr = vm_map_enter(map, dst_addr, (vm_map_size_t)size, (vm_map_offset_t) 0,
- VM_FLAGS_ANYWHERE, upl->map_object, offset, FALSE,
- VM_PROT_DEFAULT, VM_PROT_ALL, VM_INHERIT_DEFAULT);
+ VM_FLAGS_ANYWHERE, VM_MAP_KERNEL_FLAGS_NONE, VM_KERN_MEMORY_OSFMK,
+ upl->map_object, offset, FALSE,
+ VM_PROT_DEFAULT, VM_PROT_ALL, VM_INHERIT_DEFAULT);
if (kr != KERN_SUCCESS) {
+ vm_object_deallocate(upl->map_object);
upl_unlock(upl);
- return(kr);
+ return kr;
}
- }
- else {
+ } else {
kr = vm_map_enter(map, dst_addr, (vm_map_size_t)size, (vm_map_offset_t) 0,
- VM_FLAGS_FIXED, upl->map_object, offset, FALSE,
- VM_PROT_DEFAULT, VM_PROT_ALL, VM_INHERIT_DEFAULT);
- if(kr)
+ VM_FLAGS_FIXED, VM_MAP_KERNEL_FLAGS_NONE, VM_KERN_MEMORY_OSFMK,
+ upl->map_object, offset, FALSE,
+ VM_PROT_DEFAULT, VM_PROT_ALL, VM_INHERIT_DEFAULT);
+ if (kr) {
panic("vm_map_enter failed for a Vector UPL\n");
+ }
}
vm_object_lock(upl->map_object);
m = vm_page_lookup(upl->map_object, offset);
if (m) {
- m->pmapped = TRUE;
+ m->vmp_pmapped = TRUE;
- /* CODE SIGNING ENFORCEMENT: page has been wpmapped,
+ /* CODE SIGNING ENFORCEMENT: page has been wpmapped,
* but only in kernel space. If this was on a user map,
* we'd have to set the wpmapped bit. */
- /* m->wpmapped = TRUE; */
- assert(map==kernel_map);
-
- PMAP_ENTER(map->pmap, addr, m, VM_PROT_ALL, VM_PROT_NONE, 0, TRUE);
+ /* m->vmp_wpmapped = TRUE; */
+ assert(map->pmap == kernel_pmap);
+
+ PMAP_ENTER(map->pmap, addr, m, VM_PROT_DEFAULT, VM_PROT_NONE, 0, TRUE, kr);
+
+ assert(kr == KERN_SUCCESS);
+#if KASAN
+ kasan_notify_address(addr, PAGE_SIZE_64);
+#endif
}
offset += PAGE_SIZE_64;
}
upl->flags |= UPL_PAGE_LIST_MAPPED;
upl->kaddr = (vm_offset_t) *dst_addr;
assert(upl->kaddr == *dst_addr);
-
- if(isVectorUPL)
+
+ if (isVectorUPL) {
goto process_upl_to_enter;
+ }
+
+ if (!isVectorUPL) {
+ vm_map_offset_t addr_adjustment;
+
+ addr_adjustment = (vm_map_offset_t)(upl->u_offset - upl_adjusted_offset(upl, VM_MAP_PAGE_MASK(map)));
+ if (addr_adjustment) {
+ assert(VM_MAP_PAGE_MASK(map) != PAGE_MASK);
+ DEBUG4K_UPL("dst_addr 0x%llx (+ 0x%llx) -> 0x%llx\n", (uint64_t)*dst_addr, (uint64_t)addr_adjustment, (uint64_t)(*dst_addr + addr_adjustment));
+ *dst_addr += addr_adjustment;
+ }
+ }
upl_unlock(upl);
return KERN_SUCCESS;
}
-
+
/*
* Internal routine to remove a UPL mapping from a VM map.
*
*/
kern_return_t
vm_map_remove_upl(
- vm_map_t map,
- upl_t upl)
+ vm_map_t map,
+ upl_t upl)
{
- vm_address_t addr;
- upl_size_t size;
- int isVectorUPL = 0, curr_upl = 0;
- upl_t vector_upl = NULL;
+ vm_address_t addr;
+ upl_size_t size;
+ int isVectorUPL = 0, curr_upl = 0;
+ upl_t vector_upl = NULL;
- if (upl == UPL_NULL)
+ if (upl == UPL_NULL) {
return KERN_INVALID_ARGUMENT;
+ }
- if((isVectorUPL = vector_upl_is_valid(upl))) {
- int unmapped=0, valid_upls=0;
+ if ((isVectorUPL = vector_upl_is_valid(upl))) {
+ int unmapped = 0, valid_upls = 0;
vector_upl = upl;
upl_lock(vector_upl);
- for(curr_upl=0; curr_upl < MAX_VECTOR_UPL_ELEMENTS; curr_upl++) {
+ for (curr_upl = 0; curr_upl < MAX_VECTOR_UPL_ELEMENTS; curr_upl++) {
upl = vector_upl_subupl_byindex(vector_upl, curr_upl );
- if(upl == NULL)
+ if (upl == NULL) {
continue;
+ }
valid_upls++;
- if (!(UPL_PAGE_LIST_MAPPED & upl->flags))
+ if (!(UPL_PAGE_LIST_MAPPED & upl->flags)) {
unmapped++;
+ }
}
- if(unmapped) {
- if(unmapped != valid_upls)
+ if (unmapped) {
+ if (unmapped != valid_upls) {
panic("%d of the %d sub-upls within the Vector UPL is/are not mapped\n", unmapped, valid_upls);
- else {
+ } else {
upl_unlock(vector_upl);
return KERN_FAILURE;
}
}
- curr_upl=0;
- }
- else
+ curr_upl = 0;
+ } else {
upl_lock(upl);
+ }
process_upl_to_remove:
- if(isVectorUPL) {
- if(curr_upl == MAX_VECTOR_UPL_ELEMENTS) {
+ if (isVectorUPL) {
+ if (curr_upl == MAX_VECTOR_UPL_ELEMENTS) {
vm_map_t v_upl_submap;
vm_offset_t v_upl_submap_dst_addr;
vector_upl_get_submap(vector_upl, &v_upl_submap, &v_upl_submap_dst_addr);
- vm_map_remove(map, v_upl_submap_dst_addr, v_upl_submap_dst_addr + vector_upl->size, VM_MAP_NO_FLAGS);
+ vm_map_remove(map, v_upl_submap_dst_addr,
+ v_upl_submap_dst_addr + vector_upl->u_size,
+ VM_MAP_REMOVE_NO_FLAGS);
vm_map_deallocate(v_upl_submap);
upl_unlock(vector_upl);
return KERN_SUCCESS;
}
upl = vector_upl_subupl_byindex(vector_upl, curr_upl++ );
- if(upl == NULL)
- goto process_upl_to_remove;
+ if (upl == NULL) {
+ goto process_upl_to_remove;
+ }
}
if (upl->flags & UPL_PAGE_LIST_MAPPED) {
addr = upl->kaddr;
- size = upl->size;
+ size = upl_adjusted_size(upl, VM_MAP_PAGE_MASK(map));
assert(upl->ref_count > 1);
- upl->ref_count--; /* removing mapping ref */
+ upl->ref_count--; /* removing mapping ref */
upl->flags &= ~UPL_PAGE_LIST_MAPPED;
upl->kaddr = (vm_offset_t) 0;
-
- if(!isVectorUPL) {
+
+ if (!isVectorUPL) {
upl_unlock(upl);
-
+
vm_map_remove(
map,
vm_map_trunc_page(addr,
- VM_MAP_PAGE_MASK(map)),
+ VM_MAP_PAGE_MASK(map)),
vm_map_round_page(addr + size,
- VM_MAP_PAGE_MASK(map)),
- VM_MAP_NO_FLAGS);
-
+ VM_MAP_PAGE_MASK(map)),
+ VM_MAP_REMOVE_NO_FLAGS);
return KERN_SUCCESS;
- }
- else {
+ } else {
/*
- * If it's a Vectored UPL, we'll be removing the entire
- * submap anyways, so no need to remove individual UPL
- * element mappings from within the submap
- */
+ * If it's a Vectored UPL, we'll be removing the entire
+ * submap anyways, so no need to remove individual UPL
+ * element mappings from within the submap
+ */
goto process_upl_to_remove;
}
}
return KERN_FAILURE;
}
-extern int panic_on_cs_killed;
+
kern_return_t
upl_commit_range(
- upl_t upl,
- upl_offset_t offset,
- upl_size_t size,
- int flags,
- upl_page_info_t *page_list,
- mach_msg_type_number_t count,
- boolean_t *empty)
+ upl_t upl,
+ upl_offset_t offset,
+ upl_size_t size,
+ int flags,
+ upl_page_info_t *page_list,
+ mach_msg_type_number_t count,
+ boolean_t *empty)
{
- upl_size_t xfer_size, subupl_size = size;
- vm_object_t shadow_object;
- vm_object_t object;
- vm_object_offset_t target_offset;
- upl_offset_t subupl_offset = offset;
- int entry;
- wpl_array_t lite_list;
- int occupied;
- int clear_refmod = 0;
- int pgpgout_count = 0;
- struct vm_page_delayed_work dw_array[DEFAULT_DELAYED_WORK_LIMIT];
- struct vm_page_delayed_work *dwp;
- int dw_count;
- int dw_limit;
- int isVectorUPL = 0;
- upl_t vector_upl = NULL;
- boolean_t should_be_throttled = FALSE;
-
+ upl_size_t xfer_size, subupl_size;
+ vm_object_t shadow_object;
+ vm_object_t object;
+ vm_object_t m_object;
+ vm_object_offset_t target_offset;
+ upl_offset_t subupl_offset = offset;
+ int entry;
+ wpl_array_t lite_list;
+ int occupied;
+ int clear_refmod = 0;
+ int pgpgout_count = 0;
+ struct vm_page_delayed_work dw_array;
+ struct vm_page_delayed_work *dwp, *dwp_start;
+ bool dwp_finish_ctx = TRUE;
+ int dw_count;
+ int dw_limit;
+ int isVectorUPL = 0;
+ upl_t vector_upl = NULL;
+ boolean_t should_be_throttled = FALSE;
+
+ vm_page_t nxt_page = VM_PAGE_NULL;
+ int fast_path_possible = 0;
+ int fast_path_full_commit = 0;
+ int throttle_page = 0;
+ int unwired_count = 0;
+ int local_queue_count = 0;
+ vm_page_t first_local, last_local;
+ vm_object_offset_t obj_start, obj_end, obj_offset;
+ kern_return_t kr = KERN_SUCCESS;
+
+// DEBUG4K_UPL("upl %p (u_offset 0x%llx u_size 0x%llx) object %p offset 0x%llx size 0x%llx flags 0x%x\n", upl, (uint64_t)upl->u_offset, (uint64_t)upl->u_size, upl->map_object, (uint64_t)offset, (uint64_t)size, flags);
+
+ dwp_start = dwp = NULL;
+
+ subupl_size = size;
*empty = FALSE;
- if (upl == UPL_NULL)
+ if (upl == UPL_NULL) {
return KERN_INVALID_ARGUMENT;
+ }
+
+ dw_count = 0;
+ dw_limit = DELAYED_WORK_LIMIT(DEFAULT_DELAYED_WORK_LIMIT);
+ dwp_start = vm_page_delayed_work_get_ctx();
+ if (dwp_start == NULL) {
+ dwp_start = &dw_array;
+ dw_limit = 1;
+ dwp_finish_ctx = FALSE;
+ }
- if (count == 0)
+ dwp = dwp_start;
+
+ if (count == 0) {
page_list = NULL;
+ }
- if((isVectorUPL = vector_upl_is_valid(upl))) {
+ if ((isVectorUPL = vector_upl_is_valid(upl))) {
vector_upl = upl;
upl_lock(vector_upl);
- }
- else
+ } else {
upl_lock(upl);
+ }
process_upl_to_commit:
- if(isVectorUPL) {
+ if (isVectorUPL) {
size = subupl_size;
offset = subupl_offset;
- if(size == 0) {
+ if (size == 0) {
upl_unlock(vector_upl);
- return KERN_SUCCESS;
+ kr = KERN_SUCCESS;
+ goto done;
}
upl = vector_upl_subupl_byoffset(vector_upl, &offset, &size);
- if(upl == NULL) {
+ if (upl == NULL) {
upl_unlock(vector_upl);
- return KERN_FAILURE;
+ kr = KERN_FAILURE;
+ goto done;
}
page_list = UPL_GET_INTERNAL_PAGE_LIST_SIMPLE(upl);
subupl_size -= size;
#if UPL_DEBUG
if (upl->upl_commit_index < UPL_DEBUG_COMMIT_RECORDS) {
(void) OSBacktrace(&upl->upl_commit_records[upl->upl_commit_index].c_retaddr[0], UPL_DEBUG_STACK_FRAMES);
-
+
upl->upl_commit_records[upl->upl_commit_index].c_beg = offset;
upl->upl_commit_records[upl->upl_commit_index].c_end = (offset + size);
upl->upl_commit_index++;
}
#endif
- if (upl->flags & UPL_DEVICE_MEMORY)
+ if (upl->flags & UPL_DEVICE_MEMORY) {
xfer_size = 0;
- else if ((offset + size) <= upl->size)
- xfer_size = size;
- else {
- if(!isVectorUPL)
+ } else if ((offset + size) <= upl_adjusted_size(upl, PAGE_MASK)) {
+ xfer_size = size;
+ } else {
+ if (!isVectorUPL) {
upl_unlock(upl);
- else {
+ } else {
upl_unlock(vector_upl);
}
- return KERN_FAILURE;
+ DEBUG4K_ERROR("upl %p (u_offset 0x%llx u_size 0x%x) offset 0x%x size 0x%x\n", upl, upl->u_offset, upl->u_size, offset, size);
+ kr = KERN_FAILURE;
+ goto done;
}
- if (upl->flags & UPL_SET_DIRTY)
+ if (upl->flags & UPL_SET_DIRTY) {
flags |= UPL_COMMIT_SET_DIRTY;
- if (upl->flags & UPL_CLEAR_DIRTY)
- flags |= UPL_COMMIT_CLEAR_DIRTY;
+ }
+ if (upl->flags & UPL_CLEAR_DIRTY) {
+ flags |= UPL_COMMIT_CLEAR_DIRTY;
+ }
- if (upl->flags & UPL_INTERNAL)
+ if (upl->flags & UPL_INTERNAL) {
lite_list = (wpl_array_t) ((((uintptr_t)upl) + sizeof(struct upl))
- + ((upl->size/PAGE_SIZE) * sizeof(upl_page_info_t)));
- else
+ + ((upl_adjusted_size(upl, PAGE_MASK) / PAGE_SIZE) * sizeof(upl_page_info_t)));
+ } else {
lite_list = (wpl_array_t) (((uintptr_t)upl) + sizeof(struct upl));
+ }
object = upl->map_object;
if (upl->flags & UPL_SHADOWED) {
- vm_object_lock(object);
+ vm_object_lock(object);
shadow_object = object->shadow;
} else {
shadow_object = object;
}
- entry = offset/PAGE_SIZE;
+ entry = offset / PAGE_SIZE;
target_offset = (vm_object_offset_t)offset;
- if (upl->flags & UPL_KERNEL_OBJECT)
+ if (upl->flags & UPL_KERNEL_OBJECT) {
vm_object_lock_shared(shadow_object);
- else
+ } else {
vm_object_lock(shadow_object);
+ }
+
+ VM_OBJECT_WIRED_PAGE_UPDATE_START(shadow_object);
if (upl->flags & UPL_ACCESS_BLOCKED) {
assert(shadow_object->blocked_access);
*/
flags &= ~UPL_COMMIT_CS_VALIDATED;
}
- if (! page_list) {
+ if (!page_list) {
/*
* No page list to get the code-signing info from !?
*/
flags &= ~UPL_COMMIT_CS_VALIDATED;
}
- if (!VM_DYNAMIC_PAGING_ENABLED(memory_manager_default) && shadow_object->internal)
+ if (!VM_DYNAMIC_PAGING_ENABLED() && shadow_object->internal) {
should_be_throttled = TRUE;
+ }
- dwp = &dw_array[0];
- dw_count = 0;
- dw_limit = DELAYED_WORK_LIMIT(DEFAULT_DELAYED_WORK_LIMIT);
+ if ((upl->flags & UPL_IO_WIRE) &&
+ !(flags & UPL_COMMIT_FREE_ABSENT) &&
+ !isVectorUPL &&
+ shadow_object->purgable != VM_PURGABLE_VOLATILE &&
+ shadow_object->purgable != VM_PURGABLE_EMPTY) {
+ if (!vm_page_queue_empty(&shadow_object->memq)) {
+ if (size == shadow_object->vo_size) {
+ nxt_page = (vm_page_t)vm_page_queue_first(&shadow_object->memq);
+ fast_path_full_commit = 1;
+ }
+ fast_path_possible = 1;
- while (xfer_size) {
- vm_page_t t, m;
+ if (!VM_DYNAMIC_PAGING_ENABLED() && shadow_object->internal &&
+ (shadow_object->purgable == VM_PURGABLE_DENY ||
+ shadow_object->purgable == VM_PURGABLE_NONVOLATILE ||
+ shadow_object->purgable == VM_PURGABLE_VOLATILE)) {
+ throttle_page = 1;
+ }
+ }
+ }
+ first_local = VM_PAGE_NULL;
+ last_local = VM_PAGE_NULL;
+
+ obj_start = target_offset + upl->u_offset - shadow_object->paging_offset;
+ obj_end = obj_start + xfer_size;
+ obj_start = vm_object_trunc_page(obj_start);
+ obj_end = vm_object_round_page(obj_end);
+ for (obj_offset = obj_start;
+ obj_offset < obj_end;
+ obj_offset += PAGE_SIZE) {
+ vm_page_t t, m;
dwp->dw_mask = 0;
clear_refmod = 0;
m = VM_PAGE_NULL;
if (upl->flags & UPL_LITE) {
- unsigned int pg_num;
+ unsigned int pg_num;
- pg_num = (unsigned int) (target_offset/PAGE_SIZE);
- assert(pg_num == target_offset/PAGE_SIZE);
+ if (nxt_page != VM_PAGE_NULL) {
+ m = nxt_page;
+ nxt_page = (vm_page_t)vm_page_queue_next(&nxt_page->vmp_listq);
+ target_offset = m->vmp_offset;
+ }
+ pg_num = (unsigned int) (target_offset / PAGE_SIZE);
+ assert(pg_num == target_offset / PAGE_SIZE);
- if (lite_list[pg_num>>5] & (1 << (pg_num & 31))) {
- lite_list[pg_num>>5] &= ~(1 << (pg_num & 31));
+ if (lite_list[pg_num >> 5] & (1U << (pg_num & 31))) {
+ lite_list[pg_num >> 5] &= ~(1U << (pg_num & 31));
- if (!(upl->flags & UPL_KERNEL_OBJECT))
- m = vm_page_lookup(shadow_object, target_offset + (upl->offset - shadow_object->paging_offset));
+ if (!(upl->flags & UPL_KERNEL_OBJECT) && m == VM_PAGE_NULL) {
+ m = vm_page_lookup(shadow_object, obj_offset);
+ }
+ } else {
+ m = NULL;
}
}
if (upl->flags & UPL_SHADOWED) {
- if ((t = vm_page_lookup(object, target_offset)) != VM_PAGE_NULL) {
-
- t->pageout = FALSE;
+ if ((t = vm_page_lookup(object, target_offset)) != VM_PAGE_NULL) {
+ t->vmp_free_when_done = FALSE;
VM_PAGE_FREE(t);
- if (m == VM_PAGE_NULL)
+ if (!(upl->flags & UPL_KERNEL_OBJECT) && m == VM_PAGE_NULL) {
m = vm_page_lookup(shadow_object, target_offset + object->vo_shadow_offset);
+ }
}
}
- if ((upl->flags & UPL_KERNEL_OBJECT) || m == VM_PAGE_NULL)
+ if (m == VM_PAGE_NULL) {
goto commit_next_page;
+ }
+
+ m_object = VM_PAGE_OBJECT(m);
- if (m->compressor) {
- assert(m->busy);
+ if (m->vmp_q_state == VM_PAGE_USED_BY_COMPRESSOR) {
+ assert(m->vmp_busy);
dwp->dw_mask |= (DW_clear_busy | DW_PAGE_WAKEUP);
goto commit_next_page;
* Set the code signing bits according to
* what the UPL says they should be.
*/
- m->cs_validated = page_list[entry].cs_validated;
- m->cs_tainted = page_list[entry].cs_tainted;
+ m->vmp_cs_validated |= page_list[entry].cs_validated;
+ m->vmp_cs_tainted |= page_list[entry].cs_tainted;
+ m->vmp_cs_nx |= page_list[entry].cs_nx;
+ }
+ if (flags & UPL_COMMIT_WRITTEN_BY_KERNEL) {
+ m->vmp_written_by_kernel = TRUE;
}
- if (flags & UPL_COMMIT_WRITTEN_BY_KERNEL)
- m->written_by_kernel = TRUE;
if (upl->flags & UPL_IO_WIRE) {
-
- if (page_list)
+ if (page_list) {
page_list[entry].phys_addr = 0;
+ }
if (flags & UPL_COMMIT_SET_DIRTY) {
SET_PAGE_DIRTY(m, FALSE);
} else if (flags & UPL_COMMIT_CLEAR_DIRTY) {
- m->dirty = FALSE;
+ m->vmp_dirty = FALSE;
- if (! (flags & UPL_COMMIT_CS_VALIDATED) &&
- m->cs_validated && !m->cs_tainted) {
+ if (!(flags & UPL_COMMIT_CS_VALIDATED) &&
+ m->vmp_cs_validated &&
+ m->vmp_cs_tainted != VMP_CS_ALL_TRUE) {
/*
* CODE SIGNING:
* This page is no longer dirty
* so it will need to be
* re-validated.
*/
- if (panic_on_cs_killed &&
- m->slid) {
- panic("upl_commit_range(%p): page %p was slid\n",
- upl, m);
- }
- assert(!m->slid);
- m->cs_validated = FALSE;
-#if DEVELOPMENT || DEBUG
- vm_cs_validated_resets++;
-#endif
- pmap_disconnect(m->phys_page);
+ m->vmp_cs_validated = VMP_CS_ALL_FALSE;
+
+ VM_PAGEOUT_DEBUG(vm_cs_validated_resets, 1);
+
+ pmap_disconnect(VM_PAGE_GET_PHYS_PAGE(m));
}
clear_refmod |= VM_MEM_MODIFIED;
}
- if (flags & UPL_COMMIT_INACTIVATE) {
- dwp->dw_mask |= DW_vm_page_deactivate_internal;
- clear_refmod |= VM_MEM_REFERENCED;
- }
if (upl->flags & UPL_ACCESS_BLOCKED) {
/*
* We blocked access to the pages in this UPL.
*/
dwp->dw_mask |= (DW_clear_busy | DW_PAGE_WAKEUP);
}
- if (m->absent) {
- if (flags & UPL_COMMIT_FREE_ABSENT)
- dwp->dw_mask |= DW_vm_page_free;
- else {
- m->absent = FALSE;
+ if (fast_path_possible) {
+ assert(m_object->purgable != VM_PURGABLE_EMPTY);
+ assert(m_object->purgable != VM_PURGABLE_VOLATILE);
+ if (m->vmp_absent) {
+ assert(m->vmp_q_state == VM_PAGE_NOT_ON_Q);
+ assert(m->vmp_wire_count == 0);
+ assert(m->vmp_busy);
+
+ m->vmp_absent = FALSE;
dwp->dw_mask |= (DW_clear_busy | DW_PAGE_WAKEUP);
+ } else {
+ if (m->vmp_wire_count == 0) {
+ panic("wire_count == 0, m = %p, obj = %p\n", m, shadow_object);
+ }
+ assert(m->vmp_q_state == VM_PAGE_IS_WIRED);
+
+ /*
+ * XXX FBDP need to update some other
+ * counters here (purgeable_wired_count)
+ * (ledgers), ...
+ */
+ assert(m->vmp_wire_count > 0);
+ m->vmp_wire_count--;
+
+ if (m->vmp_wire_count == 0) {
+ m->vmp_q_state = VM_PAGE_NOT_ON_Q;
+ unwired_count++;
+ }
+ }
+ if (m->vmp_wire_count == 0) {
+ assert(m->vmp_pageq.next == 0 && m->vmp_pageq.prev == 0);
+
+ if (last_local == VM_PAGE_NULL) {
+ assert(first_local == VM_PAGE_NULL);
+
+ last_local = m;
+ first_local = m;
+ } else {
+ assert(first_local != VM_PAGE_NULL);
+
+ m->vmp_pageq.next = VM_PAGE_CONVERT_TO_QUEUE_ENTRY(first_local);
+ first_local->vmp_pageq.prev = VM_PAGE_CONVERT_TO_QUEUE_ENTRY(m);
+ first_local = m;
+ }
+ local_queue_count++;
- if ( !(dwp->dw_mask & DW_vm_page_deactivate_internal))
- dwp->dw_mask |= DW_vm_page_activate;
+ if (throttle_page) {
+ m->vmp_q_state = VM_PAGE_ON_THROTTLED_Q;
+ } else {
+ if (flags & UPL_COMMIT_INACTIVATE) {
+ if (shadow_object->internal) {
+ m->vmp_q_state = VM_PAGE_ON_INACTIVE_INTERNAL_Q;
+ } else {
+ m->vmp_q_state = VM_PAGE_ON_INACTIVE_EXTERNAL_Q;
+ }
+ } else {
+ m->vmp_q_state = VM_PAGE_ON_ACTIVE_Q;
+ }
+ }
+ }
+ } else {
+ if (flags & UPL_COMMIT_INACTIVATE) {
+ dwp->dw_mask |= DW_vm_page_deactivate_internal;
+ clear_refmod |= VM_MEM_REFERENCED;
}
- } else
- dwp->dw_mask |= DW_vm_page_unwire;
+ if (m->vmp_absent) {
+ if (flags & UPL_COMMIT_FREE_ABSENT) {
+ dwp->dw_mask |= DW_vm_page_free;
+ } else {
+ m->vmp_absent = FALSE;
+ dwp->dw_mask |= (DW_clear_busy | DW_PAGE_WAKEUP);
+ if (!(dwp->dw_mask & DW_vm_page_deactivate_internal)) {
+ dwp->dw_mask |= DW_vm_page_activate;
+ }
+ }
+ } else {
+ dwp->dw_mask |= DW_vm_page_unwire;
+ }
+ }
goto commit_next_page;
}
- assert(!m->compressor);
+ assert(m->vmp_q_state != VM_PAGE_USED_BY_COMPRESSOR);
- if (page_list)
+ if (page_list) {
page_list[entry].phys_addr = 0;
+ }
/*
* make sure to clear the hardware
* change of state
*/
if (flags & UPL_COMMIT_CLEAR_DIRTY) {
- m->dirty = FALSE;
+ m->vmp_dirty = FALSE;
clear_refmod |= VM_MEM_MODIFIED;
}
- if (m->laundry)
+ if (m->vmp_laundry) {
dwp->dw_mask |= DW_vm_pageout_throttle_up;
+ }
+
+ if (VM_PAGE_WIRED(m)) {
+ m->vmp_free_when_done = FALSE;
+ }
- if (VM_PAGE_WIRED(m))
- m->pageout = FALSE;
-
- if (! (flags & UPL_COMMIT_CS_VALIDATED) &&
- m->cs_validated && !m->cs_tainted) {
+ if (!(flags & UPL_COMMIT_CS_VALIDATED) &&
+ m->vmp_cs_validated &&
+ m->vmp_cs_tainted != VMP_CS_ALL_TRUE) {
/*
* CODE SIGNING:
* This page is no longer dirty
* so it will need to be
* re-validated.
*/
- if (panic_on_cs_killed &&
- m->slid) {
- panic("upl_commit_range(%p): page %p was slid\n",
- upl, m);
- }
- assert(!m->slid);
- m->cs_validated = FALSE;
-#if DEVELOPMENT || DEBUG
- vm_cs_validated_resets++;
-#endif
- pmap_disconnect(m->phys_page);
+ m->vmp_cs_validated = VMP_CS_ALL_FALSE;
+
+ VM_PAGEOUT_DEBUG(vm_cs_validated_resets, 1);
+
+ pmap_disconnect(VM_PAGE_GET_PHYS_PAGE(m));
}
- if (m->overwriting) {
+ if (m->vmp_overwriting) {
/*
* the (COPY_OUT_FROM == FALSE) request_page_list case
*/
- if (m->busy) {
- m->absent = FALSE;
+ if (m->vmp_busy) {
+#if CONFIG_PHANTOM_CACHE
+ if (m->vmp_absent && !m_object->internal) {
+ dwp->dw_mask |= DW_vm_phantom_cache_update;
+ }
+#endif
+ m->vmp_absent = FALSE;
dwp->dw_mask |= DW_clear_busy;
} else {
dwp->dw_mask |= DW_vm_page_unwire; /* reactivates */
}
- m->overwriting = FALSE;
+ m->vmp_overwriting = FALSE;
}
- if (m->encrypted_cleaning == TRUE) {
- m->encrypted_cleaning = FALSE;
+ m->vmp_cleaning = FALSE;
- dwp->dw_mask |= DW_clear_busy | DW_PAGE_WAKEUP;
- }
- m->cleaning = FALSE;
-
- if (m->pageout) {
- /*
+ if (m->vmp_free_when_done) {
+ /*
* With the clean queue enabled, UPL_PAGEOUT should
- * no longer set the pageout bit. It's pages now go
+ * no longer set the pageout bit. Its pages now go
* to the clean queue.
+ *
+ * We don't use the cleaned Q anymore and so this
+ * assert isn't correct. The code for the clean Q
+ * still exists and might be used in the future. If we
+ * go back to the cleaned Q, we will re-enable this
+ * assert.
+ *
+ * assert(!(upl->flags & UPL_PAGEOUT));
*/
- assert(!(flags & UPL_PAGEOUT));
+ assert(!m_object->internal);
+
+ m->vmp_free_when_done = FALSE;
- m->pageout = FALSE;
-#if MACH_CLUSTER_STATS
- if (m->wanted) vm_pageout_target_collisions++;
-#endif
if ((flags & UPL_COMMIT_SET_DIRTY) ||
- (m->pmapped && (pmap_disconnect(m->phys_page) & VM_MEM_MODIFIED))) {
+ (m->vmp_pmapped && (pmap_disconnect(VM_PAGE_GET_PHYS_PAGE(m)) & VM_MEM_MODIFIED))) {
/*
* page was re-dirtied after we started
- * the pageout... reactivate it since
+ * the pageout... reactivate it since
* we don't know whether the on-disk
* copy matches what is now in memory
*/
SET_PAGE_DIRTY(m, FALSE);
-
+
dwp->dw_mask |= DW_vm_page_activate | DW_PAGE_WAKEUP;
if (upl->flags & UPL_PAGEOUT) {
- CLUSTER_STAT(vm_pageout_target_page_dirtied++;)
VM_STAT_INCR(reactivations);
DTRACE_VM2(pgrec, int, 1, (uint64_t *), NULL);
}
* page has been successfully cleaned
* go ahead and free it for other use
*/
- if (m->object->internal) {
+ if (m_object->internal) {
DTRACE_VM2(anonpgout, int, 1, (uint64_t *), NULL);
} else {
DTRACE_VM2(fspgout, int, 1, (uint64_t *), NULL);
}
- m->dirty = FALSE;
- m->busy = TRUE;
+ m->vmp_dirty = FALSE;
+ m->vmp_busy = TRUE;
dwp->dw_mask |= DW_vm_page_free;
}
goto commit_next_page;
}
-#if MACH_CLUSTER_STATS
- if (m->wpmapped)
- m->dirty = pmap_is_modified(m->phys_page);
-
- if (m->dirty) vm_pageout_cluster_dirtied++;
- else vm_pageout_cluster_cleaned++;
- if (m->wanted) vm_pageout_cluster_collisions++;
-#endif
/*
* It is a part of the semantic of COPYOUT_FROM
* UPLs that a commit implies cache sync
* this can be used to strip the precious bit
* as well as clean
*/
- if ((upl->flags & UPL_PAGE_SYNC_DONE) || (flags & UPL_COMMIT_CLEAR_PRECIOUS))
- m->precious = FALSE;
+ if ((upl->flags & UPL_PAGE_SYNC_DONE) || (flags & UPL_COMMIT_CLEAR_PRECIOUS)) {
+ m->vmp_precious = FALSE;
+ }
if (flags & UPL_COMMIT_SET_DIRTY) {
SET_PAGE_DIRTY(m, FALSE);
} else {
- m->dirty = FALSE;
+ m->vmp_dirty = FALSE;
}
/* with the clean queue on, move *all* cleaned pages to the clean queue */
- if (hibernate_cleaning_in_progress == FALSE && !m->dirty && (upl->flags & UPL_PAGEOUT)) {
+ if (hibernate_cleaning_in_progress == FALSE && !m->vmp_dirty && (upl->flags & UPL_PAGEOUT)) {
pgpgout_count++;
- /* this page used to be dirty; now it's on the clean queue. */
- m->was_dirty = TRUE;
+ VM_STAT_INCR(pageouts);
+ DTRACE_VM2(pgout, int, 1, (uint64_t *), NULL);
dwp->dw_mask |= DW_enqueue_cleaned;
- vm_pageout_enqueued_cleaned_from_inactive_dirty++;
- } else if (should_be_throttled == TRUE && !m->active && !m->inactive && !m->speculative && !m->throttled) {
+ } else if (should_be_throttled == TRUE && (m->vmp_q_state == VM_PAGE_NOT_ON_Q)) {
/*
* page coming back in from being 'frozen'...
* it was dirty before it was frozen, so keep it so
*/
SET_PAGE_DIRTY(m, FALSE);
dwp->dw_mask |= DW_vm_page_activate;
-
} else {
- if ((flags & UPL_COMMIT_INACTIVATE) && !m->clustered && !m->speculative) {
+ if ((flags & UPL_COMMIT_INACTIVATE) && !m->vmp_clustered && (m->vmp_q_state != VM_PAGE_ON_SPECULATIVE_Q)) {
dwp->dw_mask |= DW_vm_page_deactivate_internal;
clear_refmod |= VM_MEM_REFERENCED;
- } else if (!m->active && !m->inactive && !m->speculative) {
-
- if (m->clustered || (flags & UPL_COMMIT_SPECULATE))
+ } else if (!VM_PAGE_PAGEABLE(m)) {
+ if (m->vmp_clustered || (flags & UPL_COMMIT_SPECULATE)) {
dwp->dw_mask |= DW_vm_page_speculate;
- else if (m->reference)
+ } else if (m->vmp_reference) {
dwp->dw_mask |= DW_vm_page_activate;
- else {
+ } else {
dwp->dw_mask |= DW_vm_page_deactivate_internal;
clear_refmod |= VM_MEM_REFERENCED;
}
*/
dwp->dw_mask |= DW_clear_busy;
}
-
/*
* Wakeup any thread waiting for the page to be un-cleaning.
*/
dwp->dw_mask |= DW_PAGE_WAKEUP;
commit_next_page:
- if (clear_refmod)
- pmap_clear_refmod(m->phys_page, clear_refmod);
+ if (clear_refmod) {
+ pmap_clear_refmod(VM_PAGE_GET_PHYS_PAGE(m), clear_refmod);
+ }
target_offset += PAGE_SIZE_64;
xfer_size -= PAGE_SIZE;
VM_PAGE_ADD_DELAYED_WORK(dwp, m, dw_count);
if (dw_count >= dw_limit) {
- vm_page_do_delayed_work(shadow_object, &dw_array[0], dw_count);
-
- dwp = &dw_array[0];
+ vm_page_do_delayed_work(shadow_object, VM_KERN_MEMORY_NONE, dwp_start, dw_count);
+
+ dwp = dwp_start;
dw_count = 0;
}
} else {
- if (dwp->dw_mask & DW_clear_busy)
- m->busy = FALSE;
+ if (dwp->dw_mask & DW_clear_busy) {
+ m->vmp_busy = FALSE;
+ }
- if (dwp->dw_mask & DW_PAGE_WAKEUP)
+ if (dwp->dw_mask & DW_PAGE_WAKEUP) {
PAGE_WAKEUP(m);
+ }
}
}
}
- if (dw_count)
- vm_page_do_delayed_work(shadow_object, &dw_array[0], dw_count);
+ if (dw_count) {
+ vm_page_do_delayed_work(shadow_object, VM_KERN_MEMORY_NONE, dwp_start, dw_count);
+ dwp = dwp_start;
+ dw_count = 0;
+ }
+
+ if (fast_path_possible) {
+ assert(shadow_object->purgable != VM_PURGABLE_VOLATILE);
+ assert(shadow_object->purgable != VM_PURGABLE_EMPTY);
+
+ if (local_queue_count || unwired_count) {
+ if (local_queue_count) {
+ vm_page_t first_target;
+ vm_page_queue_head_t *target_queue;
+
+ if (throttle_page) {
+ target_queue = &vm_page_queue_throttled;
+ } else {
+ if (flags & UPL_COMMIT_INACTIVATE) {
+ if (shadow_object->internal) {
+ target_queue = &vm_page_queue_anonymous;
+ } else {
+ target_queue = &vm_page_queue_inactive;
+ }
+ } else {
+ target_queue = &vm_page_queue_active;
+ }
+ }
+ /*
+ * Transfer the entire local queue to a regular LRU page queues.
+ */
+ vm_page_lockspin_queues();
+
+ first_target = (vm_page_t) vm_page_queue_first(target_queue);
+
+ if (vm_page_queue_empty(target_queue)) {
+ target_queue->prev = VM_PAGE_CONVERT_TO_QUEUE_ENTRY(last_local);
+ } else {
+ first_target->vmp_pageq.prev = VM_PAGE_CONVERT_TO_QUEUE_ENTRY(last_local);
+ }
+
+ target_queue->next = VM_PAGE_CONVERT_TO_QUEUE_ENTRY(first_local);
+ first_local->vmp_pageq.prev = VM_PAGE_CONVERT_TO_QUEUE_ENTRY(target_queue);
+ last_local->vmp_pageq.next = VM_PAGE_CONVERT_TO_QUEUE_ENTRY(first_target);
+
+ /*
+ * Adjust the global page counts.
+ */
+ if (throttle_page) {
+ vm_page_throttled_count += local_queue_count;
+ } else {
+ if (flags & UPL_COMMIT_INACTIVATE) {
+ if (shadow_object->internal) {
+ vm_page_anonymous_count += local_queue_count;
+ }
+ vm_page_inactive_count += local_queue_count;
+
+ token_new_pagecount += local_queue_count;
+ } else {
+ vm_page_active_count += local_queue_count;
+ }
+
+ if (shadow_object->internal) {
+ vm_page_pageable_internal_count += local_queue_count;
+ } else {
+ vm_page_pageable_external_count += local_queue_count;
+ }
+ }
+ } else {
+ vm_page_lockspin_queues();
+ }
+ if (unwired_count) {
+ vm_page_wire_count -= unwired_count;
+ VM_CHECK_MEMORYSTATUS;
+ }
+ vm_page_unlock_queues();
+ VM_OBJECT_WIRED_PAGE_COUNT(shadow_object, -unwired_count);
+ }
+ }
occupied = 1;
- if (upl->flags & UPL_DEVICE_MEMORY) {
+ if (upl->flags & UPL_DEVICE_MEMORY) {
occupied = 0;
} else if (upl->flags & UPL_LITE) {
- int pg_num;
- int i;
+ int pg_num;
+ int i;
- pg_num = upl->size/PAGE_SIZE;
- pg_num = (pg_num + 31) >> 5;
occupied = 0;
- for (i = 0; i < pg_num; i++) {
- if (lite_list[i] != 0) {
- occupied = 1;
- break;
+ if (!fast_path_full_commit) {
+ pg_num = upl_adjusted_size(upl, PAGE_MASK) / PAGE_SIZE;
+ pg_num = (pg_num + 31) >> 5;
+
+ for (i = 0; i < pg_num; i++) {
+ if (lite_list[i] != 0) {
+ occupied = 1;
+ break;
+ }
}
}
} else {
- if (queue_empty(&upl->map_object->memq))
+ if (vm_page_queue_empty(&upl->map_object->memq)) {
occupied = 0;
+ }
}
if (occupied == 0) {
/*
* should be considered relevant for the Vector UPL and not
* the internal UPLs.
*/
- if ((upl->flags & UPL_COMMIT_NOTIFY_EMPTY) || isVectorUPL)
+ if ((upl->flags & UPL_COMMIT_NOTIFY_EMPTY) || isVectorUPL) {
*empty = TRUE;
+ }
if (object == shadow_object && !(upl->flags & UPL_KERNEL_OBJECT)) {
- /*
+ /*
* this is not a paging object
* so we need to drop the paging reference
* that was taken when we created the UPL
vm_object_activity_end(shadow_object);
vm_object_collapse(shadow_object, 0, TRUE);
} else {
- /*
- * we dontated the paging reference to
- * the map object... vm_pageout_object_terminate
- * will drop this reference
- */
+ /*
+ * we dontated the paging reference to
+ * the map object... vm_pageout_object_terminate
+ * will drop this reference
+ */
}
}
+ VM_OBJECT_WIRED_PAGE_UPDATE_END(shadow_object, shadow_object->wire_tag);
vm_object_unlock(shadow_object);
- if (object != shadow_object)
- vm_object_unlock(object);
-
- if(!isVectorUPL)
+ if (object != shadow_object) {
+ vm_object_unlock(object);
+ }
+
+ if (!isVectorUPL) {
upl_unlock(upl);
- else {
- /*
+ } else {
+ /*
* If we completed our operations on an UPL that is
* part of a Vectored UPL and if empty is TRUE, then
- * we should go ahead and deallocate this UPL element.
+ * we should go ahead and deallocate this UPL element.
* Then we check if this was the last of the UPL elements
* within that Vectored UPL. If so, set empty to TRUE
* so that in ubc_upl_commit_range or ubc_upl_commit, we
* can go ahead and deallocate the Vector UPL too.
*/
- if(*empty==TRUE) {
+ if (*empty == TRUE) {
*empty = vector_upl_set_subupl(vector_upl, upl, 0);
upl_deallocate(upl);
}
goto process_upl_to_commit;
}
-
if (pgpgout_count) {
DTRACE_VM2(pgpgout, int, pgpgout_count, (uint64_t *), NULL);
}
- return KERN_SUCCESS;
+ kr = KERN_SUCCESS;
+done:
+ if (dwp_start && dwp_finish_ctx) {
+ vm_page_delayed_work_finish_ctx(dwp_start);
+ dwp_start = dwp = NULL;
+ }
+
+ return kr;
}
kern_return_t
upl_abort_range(
- upl_t upl,
- upl_offset_t offset,
- upl_size_t size,
- int error,
- boolean_t *empty)
+ upl_t upl,
+ upl_offset_t offset,
+ upl_size_t size,
+ int error,
+ boolean_t *empty)
{
- upl_page_info_t *user_page_list = NULL;
- upl_size_t xfer_size, subupl_size = size;
- vm_object_t shadow_object;
- vm_object_t object;
- vm_object_offset_t target_offset;
- upl_offset_t subupl_offset = offset;
- int entry;
- wpl_array_t lite_list;
- int occupied;
- struct vm_page_delayed_work dw_array[DEFAULT_DELAYED_WORK_LIMIT];
- struct vm_page_delayed_work *dwp;
- int dw_count;
- int dw_limit;
- int isVectorUPL = 0;
- upl_t vector_upl = NULL;
-
+ upl_page_info_t *user_page_list = NULL;
+ upl_size_t xfer_size, subupl_size;
+ vm_object_t shadow_object;
+ vm_object_t object;
+ vm_object_offset_t target_offset;
+ upl_offset_t subupl_offset = offset;
+ int entry;
+ wpl_array_t lite_list;
+ int occupied;
+ struct vm_page_delayed_work dw_array;
+ struct vm_page_delayed_work *dwp, *dwp_start;
+ bool dwp_finish_ctx = TRUE;
+ int dw_count;
+ int dw_limit;
+ int isVectorUPL = 0;
+ upl_t vector_upl = NULL;
+ vm_object_offset_t obj_start, obj_end, obj_offset;
+ kern_return_t kr = KERN_SUCCESS;
+
+// DEBUG4K_UPL("upl %p (u_offset 0x%llx u_size 0x%llx) object %p offset 0x%llx size 0x%llx error 0x%x\n", upl, (uint64_t)upl->u_offset, (uint64_t)upl->u_size, upl->map_object, (uint64_t)offset, (uint64_t)size, error);
+
+ dwp_start = dwp = NULL;
+
+ subupl_size = size;
*empty = FALSE;
- if (upl == UPL_NULL)
+ if (upl == UPL_NULL) {
return KERN_INVALID_ARGUMENT;
+ }
- if ( (upl->flags & UPL_IO_WIRE) && !(error & UPL_ABORT_DUMP_PAGES) )
+ if ((upl->flags & UPL_IO_WIRE) && !(error & UPL_ABORT_DUMP_PAGES)) {
return upl_commit_range(upl, offset, size, UPL_COMMIT_FREE_ABSENT, NULL, 0, empty);
+ }
- if((isVectorUPL = vector_upl_is_valid(upl))) {
+ dw_count = 0;
+ dw_limit = DELAYED_WORK_LIMIT(DEFAULT_DELAYED_WORK_LIMIT);
+ dwp_start = vm_page_delayed_work_get_ctx();
+ if (dwp_start == NULL) {
+ dwp_start = &dw_array;
+ dw_limit = 1;
+ dwp_finish_ctx = FALSE;
+ }
+
+ dwp = dwp_start;
+
+ if ((isVectorUPL = vector_upl_is_valid(upl))) {
vector_upl = upl;
upl_lock(vector_upl);
- }
- else
+ } else {
upl_lock(upl);
+ }
process_upl_to_abort:
- if(isVectorUPL) {
+ if (isVectorUPL) {
size = subupl_size;
offset = subupl_offset;
- if(size == 0) {
+ if (size == 0) {
upl_unlock(vector_upl);
- return KERN_SUCCESS;
+ kr = KERN_SUCCESS;
+ goto done;
}
upl = vector_upl_subupl_byoffset(vector_upl, &offset, &size);
- if(upl == NULL) {
+ if (upl == NULL) {
upl_unlock(vector_upl);
- return KERN_FAILURE;
+ kr = KERN_FAILURE;
+ goto done;
}
subupl_size -= size;
subupl_offset += size;
#if UPL_DEBUG
if (upl->upl_commit_index < UPL_DEBUG_COMMIT_RECORDS) {
(void) OSBacktrace(&upl->upl_commit_records[upl->upl_commit_index].c_retaddr[0], UPL_DEBUG_STACK_FRAMES);
-
+
upl->upl_commit_records[upl->upl_commit_index].c_beg = offset;
upl->upl_commit_records[upl->upl_commit_index].c_end = (offset + size);
upl->upl_commit_records[upl->upl_commit_index].c_aborted = 1;
upl->upl_commit_index++;
}
#endif
- if (upl->flags & UPL_DEVICE_MEMORY)
+ if (upl->flags & UPL_DEVICE_MEMORY) {
xfer_size = 0;
- else if ((offset + size) <= upl->size)
- xfer_size = size;
- else {
- if(!isVectorUPL)
+ } else if ((offset + size) <= upl_adjusted_size(upl, PAGE_MASK)) {
+ xfer_size = size;
+ } else {
+ if (!isVectorUPL) {
upl_unlock(upl);
- else {
+ } else {
upl_unlock(vector_upl);
}
-
- return KERN_FAILURE;
+ DEBUG4K_ERROR("upl %p (u_offset 0x%llx u_size 0x%x) offset 0x%x size 0x%x\n", upl, upl->u_offset, upl->u_size, offset, size);
+ kr = KERN_FAILURE;
+ goto done;
}
if (upl->flags & UPL_INTERNAL) {
- lite_list = (wpl_array_t)
- ((((uintptr_t)upl) + sizeof(struct upl))
- + ((upl->size/PAGE_SIZE) * sizeof(upl_page_info_t)));
+ lite_list = (wpl_array_t)
+ ((((uintptr_t)upl) + sizeof(struct upl))
+ + ((upl_adjusted_size(upl, PAGE_MASK) / PAGE_SIZE) * sizeof(upl_page_info_t)));
user_page_list = (upl_page_info_t *) (((uintptr_t)upl) + sizeof(struct upl));
} else {
- lite_list = (wpl_array_t)
- (((uintptr_t)upl) + sizeof(struct upl));
+ lite_list = (wpl_array_t)
+ (((uintptr_t)upl) + sizeof(struct upl));
}
object = upl->map_object;
if (upl->flags & UPL_SHADOWED) {
- vm_object_lock(object);
+ vm_object_lock(object);
shadow_object = object->shadow;
- } else
+ } else {
shadow_object = object;
+ }
- entry = offset/PAGE_SIZE;
+ entry = offset / PAGE_SIZE;
target_offset = (vm_object_offset_t)offset;
- if (upl->flags & UPL_KERNEL_OBJECT)
+ if (upl->flags & UPL_KERNEL_OBJECT) {
vm_object_lock_shared(shadow_object);
- else
+ } else {
vm_object_lock(shadow_object);
+ }
if (upl->flags & UPL_ACCESS_BLOCKED) {
assert(shadow_object->blocked_access);
vm_object_wakeup(object, VM_OBJECT_EVENT_UNBLOCKED);
}
- dwp = &dw_array[0];
- dw_count = 0;
- dw_limit = DELAYED_WORK_LIMIT(DEFAULT_DELAYED_WORK_LIMIT);
-
- if ((error & UPL_ABORT_DUMP_PAGES) && (upl->flags & UPL_KERNEL_OBJECT))
+ if ((error & UPL_ABORT_DUMP_PAGES) && (upl->flags & UPL_KERNEL_OBJECT)) {
panic("upl_abort_range: kernel_object being DUMPED");
+ }
- while (xfer_size) {
- vm_page_t t, m;
- unsigned int pg_num;
- boolean_t needed;
+ obj_start = target_offset + upl->u_offset - shadow_object->paging_offset;
+ obj_end = obj_start + xfer_size;
+ obj_start = vm_object_trunc_page(obj_start);
+ obj_end = vm_object_round_page(obj_end);
+ for (obj_offset = obj_start;
+ obj_offset < obj_end;
+ obj_offset += PAGE_SIZE) {
+ vm_page_t t, m;
+ unsigned int pg_num;
+ boolean_t needed;
- pg_num = (unsigned int) (target_offset/PAGE_SIZE);
- assert(pg_num == target_offset/PAGE_SIZE);
+ pg_num = (unsigned int) (target_offset / PAGE_SIZE);
+ assert(pg_num == target_offset / PAGE_SIZE);
needed = FALSE;
- if (user_page_list)
+ if (user_page_list) {
needed = user_page_list[pg_num].needed;
+ }
dwp->dw_mask = 0;
m = VM_PAGE_NULL;
if (upl->flags & UPL_LITE) {
+ if (lite_list[pg_num >> 5] & (1U << (pg_num & 31))) {
+ lite_list[pg_num >> 5] &= ~(1U << (pg_num & 31));
- if (lite_list[pg_num>>5] & (1 << (pg_num & 31))) {
- lite_list[pg_num>>5] &= ~(1 << (pg_num & 31));
-
- if ( !(upl->flags & UPL_KERNEL_OBJECT))
- m = vm_page_lookup(shadow_object, target_offset +
- (upl->offset - shadow_object->paging_offset));
+ if (!(upl->flags & UPL_KERNEL_OBJECT)) {
+ m = vm_page_lookup(shadow_object, obj_offset);
+ }
}
}
if (upl->flags & UPL_SHADOWED) {
- if ((t = vm_page_lookup(object, target_offset)) != VM_PAGE_NULL) {
- t->pageout = FALSE;
+ if ((t = vm_page_lookup(object, target_offset)) != VM_PAGE_NULL) {
+ t->vmp_free_when_done = FALSE;
VM_PAGE_FREE(t);
- if (m == VM_PAGE_NULL)
+ if (m == VM_PAGE_NULL) {
m = vm_page_lookup(shadow_object, target_offset + object->vo_shadow_offset);
+ }
}
}
- if ((upl->flags & UPL_KERNEL_OBJECT))
+ if ((upl->flags & UPL_KERNEL_OBJECT)) {
goto abort_next_page;
+ }
if (m != VM_PAGE_NULL) {
+ assert(m->vmp_q_state != VM_PAGE_USED_BY_COMPRESSOR);
- assert(!m->compressor);
-
- if (m->absent) {
- boolean_t must_free = TRUE;
+ if (m->vmp_absent) {
+ boolean_t must_free = TRUE;
/*
* COPYOUT = FALSE case
* be passed back to the pages customer
*/
if (error & UPL_ABORT_RESTART) {
- m->restart = TRUE;
- m->absent = FALSE;
- m->unusual = TRUE;
+ m->vmp_restart = TRUE;
+ m->vmp_absent = FALSE;
+ m->vmp_unusual = TRUE;
must_free = FALSE;
} else if (error & UPL_ABORT_UNAVAILABLE) {
- m->restart = FALSE;
- m->unusual = TRUE;
+ m->vmp_restart = FALSE;
+ m->vmp_unusual = TRUE;
must_free = FALSE;
} else if (error & UPL_ABORT_ERROR) {
- m->restart = FALSE;
- m->absent = FALSE;
- m->error = TRUE;
- m->unusual = TRUE;
+ m->vmp_restart = FALSE;
+ m->vmp_absent = FALSE;
+ m->vmp_error = TRUE;
+ m->vmp_unusual = TRUE;
must_free = FALSE;
}
- if (m->clustered && needed == FALSE) {
+ if (m->vmp_clustered && needed == FALSE) {
/*
* This page was a part of a speculative
* read-ahead initiated by the kernel
*/
must_free = TRUE;
}
+ m->vmp_cleaning = FALSE;
- /*
- * ENCRYPTED SWAP:
- * If the page was already encrypted,
- * we don't really need to decrypt it
- * now. It will get decrypted later,
- * on demand, as soon as someone needs
- * to access its contents.
- */
-
- m->cleaning = FALSE;
- m->encrypted_cleaning = FALSE;
-
- if (m->overwriting && !m->busy) {
+ if (m->vmp_overwriting && !m->vmp_busy) {
/*
* this shouldn't happen since
* this is an 'absent' page, but
* it doesn't hurt to check for
- * the 'alternate' method of
+ * the 'alternate' method of
* stabilizing the page...
* we will mark 'busy' to be cleared
* in the following code which will
*/
dwp->dw_mask |= DW_vm_page_unwire;
}
- m->overwriting = FALSE;
+ m->vmp_overwriting = FALSE;
dwp->dw_mask |= (DW_clear_busy | DW_PAGE_WAKEUP);
- if (must_free == TRUE)
+ if (must_free == TRUE) {
dwp->dw_mask |= DW_vm_page_free;
- else
+ } else {
dwp->dw_mask |= DW_vm_page_activate;
+ }
} else {
- /*
+ /*
* Handle the trusted pager throttle.
- */
- if (m->laundry)
+ */
+ if (m->vmp_laundry) {
dwp->dw_mask |= DW_vm_pageout_throttle_up;
+ }
if (upl->flags & UPL_ACCESS_BLOCKED) {
/*
*/
dwp->dw_mask |= DW_clear_busy;
}
- if (m->overwriting) {
- if (m->busy)
+ if (m->vmp_overwriting) {
+ if (m->vmp_busy) {
dwp->dw_mask |= DW_clear_busy;
- else {
+ } else {
/*
* deal with the 'alternate' method
* of stabilizing the page...
*/
dwp->dw_mask |= DW_vm_page_unwire;
}
- m->overwriting = FALSE;
+ m->vmp_overwriting = FALSE;
}
- if (m->encrypted_cleaning == TRUE) {
- m->encrypted_cleaning = FALSE;
+ m->vmp_free_when_done = FALSE;
+ m->vmp_cleaning = FALSE;
- dwp->dw_mask |= DW_clear_busy;
- }
- m->pageout = FALSE;
- m->cleaning = FALSE;
-#if MACH_PAGEMAP
- vm_external_state_clr(m->object->existence_map, m->offset);
-#endif /* MACH_PAGEMAP */
if (error & UPL_ABORT_DUMP_PAGES) {
- pmap_disconnect(m->phys_page);
+ pmap_disconnect(VM_PAGE_GET_PHYS_PAGE(m));
dwp->dw_mask |= DW_vm_page_free;
} else {
if (error & UPL_ABORT_REFERENCE) {
/*
* we've been told to explictly
- * reference this page... for
+ * reference this page... for
* file I/O, this is done by
* implementing an LRU on the inactive q
*/
dwp->dw_mask |= DW_vm_page_lru;
-
- } else if (!m->active && !m->inactive && !m->speculative)
+ } else if (!VM_PAGE_PAGEABLE(m)) {
dwp->dw_mask |= DW_vm_page_deactivate_internal;
+ }
}
dwp->dw_mask |= DW_PAGE_WAKEUP;
}
VM_PAGE_ADD_DELAYED_WORK(dwp, m, dw_count);
if (dw_count >= dw_limit) {
- vm_page_do_delayed_work(shadow_object, &dw_array[0], dw_count);
-
- dwp = &dw_array[0];
+ vm_page_do_delayed_work(shadow_object, VM_KERN_MEMORY_NONE, dwp_start, dw_count);
+
+ dwp = dwp_start;
dw_count = 0;
}
} else {
- if (dwp->dw_mask & DW_clear_busy)
- m->busy = FALSE;
+ if (dwp->dw_mask & DW_clear_busy) {
+ m->vmp_busy = FALSE;
+ }
- if (dwp->dw_mask & DW_PAGE_WAKEUP)
+ if (dwp->dw_mask & DW_PAGE_WAKEUP) {
PAGE_WAKEUP(m);
+ }
}
}
}
- if (dw_count)
- vm_page_do_delayed_work(shadow_object, &dw_array[0], dw_count);
+ if (dw_count) {
+ vm_page_do_delayed_work(shadow_object, VM_KERN_MEMORY_NONE, dwp_start, dw_count);
+ dwp = dwp_start;
+ dw_count = 0;
+ }
occupied = 1;
- if (upl->flags & UPL_DEVICE_MEMORY) {
+ if (upl->flags & UPL_DEVICE_MEMORY) {
occupied = 0;
} else if (upl->flags & UPL_LITE) {
- int pg_num;
- int i;
+ int pg_num;
+ int i;
- pg_num = upl->size/PAGE_SIZE;
+ pg_num = upl_adjusted_size(upl, PAGE_MASK) / PAGE_SIZE;
pg_num = (pg_num + 31) >> 5;
occupied = 0;
}
}
} else {
- if (queue_empty(&upl->map_object->memq))
+ if (vm_page_queue_empty(&upl->map_object->memq)) {
occupied = 0;
+ }
}
if (occupied == 0) {
/*
* should be considered relevant for the Vector UPL and
* not the internal UPLs.
*/
- if ((upl->flags & UPL_COMMIT_NOTIFY_EMPTY) || isVectorUPL)
+ if ((upl->flags & UPL_COMMIT_NOTIFY_EMPTY) || isVectorUPL) {
*empty = TRUE;
+ }
if (object == shadow_object && !(upl->flags & UPL_KERNEL_OBJECT)) {
- /*
+ /*
* this is not a paging object
* so we need to drop the paging reference
* that was taken when we created the UPL
vm_object_activity_end(shadow_object);
vm_object_collapse(shadow_object, 0, TRUE);
} else {
- /*
- * we dontated the paging reference to
- * the map object... vm_pageout_object_terminate
- * will drop this reference
- */
+ /*
+ * we dontated the paging reference to
+ * the map object... vm_pageout_object_terminate
+ * will drop this reference
+ */
}
}
vm_object_unlock(shadow_object);
- if (object != shadow_object)
- vm_object_unlock(object);
-
- if(!isVectorUPL)
+ if (object != shadow_object) {
+ vm_object_unlock(object);
+ }
+
+ if (!isVectorUPL) {
upl_unlock(upl);
- else {
- /*
- * If we completed our operations on an UPL that is
- * part of a Vectored UPL and if empty is TRUE, then
- * we should go ahead and deallocate this UPL element.
- * Then we check if this was the last of the UPL elements
- * within that Vectored UPL. If so, set empty to TRUE
- * so that in ubc_upl_abort_range or ubc_upl_abort, we
- * can go ahead and deallocate the Vector UPL too.
- */
- if(*empty == TRUE) {
- *empty = vector_upl_set_subupl(vector_upl, upl,0);
+ } else {
+ /*
+ * If we completed our operations on an UPL that is
+ * part of a Vectored UPL and if empty is TRUE, then
+ * we should go ahead and deallocate this UPL element.
+ * Then we check if this was the last of the UPL elements
+ * within that Vectored UPL. If so, set empty to TRUE
+ * so that in ubc_upl_abort_range or ubc_upl_abort, we
+ * can go ahead and deallocate the Vector UPL too.
+ */
+ if (*empty == TRUE) {
+ *empty = vector_upl_set_subupl(vector_upl, upl, 0);
upl_deallocate(upl);
}
goto process_upl_to_abort;
}
- return KERN_SUCCESS;
+ kr = KERN_SUCCESS;
+
+done:
+ if (dwp_start && dwp_finish_ctx) {
+ vm_page_delayed_work_finish_ctx(dwp_start);
+ dwp_start = dwp = NULL;
+ }
+
+ return kr;
}
kern_return_t
upl_abort(
- upl_t upl,
- int error)
+ upl_t upl,
+ int error)
{
- boolean_t empty;
+ boolean_t empty;
+
+ if (upl == UPL_NULL) {
+ return KERN_INVALID_ARGUMENT;
+ }
- return upl_abort_range(upl, 0, upl->size, error, &empty);
+ return upl_abort_range(upl, 0, upl->u_size, error, &empty);
}
/* an option on commit should be wire */
kern_return_t
upl_commit(
- upl_t upl,
- upl_page_info_t *page_list,
- mach_msg_type_number_t count)
+ upl_t upl,
+ upl_page_info_t *page_list,
+ mach_msg_type_number_t count)
+{
+ boolean_t empty;
+
+ if (upl == UPL_NULL) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ return upl_commit_range(upl, 0, upl->u_size, 0,
+ page_list, count, &empty);
+}
+
+
+void
+iopl_valid_data(
+ upl_t upl,
+ vm_tag_t tag)
{
- boolean_t empty;
+ vm_object_t object;
+ vm_offset_t offset;
+ vm_page_t m, nxt_page = VM_PAGE_NULL;
+ upl_size_t size;
+ int wired_count = 0;
+
+ if (upl == NULL) {
+ panic("iopl_valid_data: NULL upl");
+ }
+ if (vector_upl_is_valid(upl)) {
+ panic("iopl_valid_data: vector upl");
+ }
+ if ((upl->flags & (UPL_DEVICE_MEMORY | UPL_SHADOWED | UPL_ACCESS_BLOCKED | UPL_IO_WIRE | UPL_INTERNAL)) != UPL_IO_WIRE) {
+ panic("iopl_valid_data: unsupported upl, flags = %x", upl->flags);
+ }
+
+ object = upl->map_object;
+
+ if (object == kernel_object || object == compressor_object) {
+ panic("iopl_valid_data: object == kernel or compressor");
+ }
+
+ if (object->purgable == VM_PURGABLE_VOLATILE ||
+ object->purgable == VM_PURGABLE_EMPTY) {
+ panic("iopl_valid_data: object %p purgable %d",
+ object, object->purgable);
+ }
+
+ size = upl_adjusted_size(upl, PAGE_MASK);
+
+ vm_object_lock(object);
+ VM_OBJECT_WIRED_PAGE_UPDATE_START(object);
+
+ if (object->vo_size == size && object->resident_page_count == (size / PAGE_SIZE)) {
+ nxt_page = (vm_page_t)vm_page_queue_first(&object->memq);
+ } else {
+ offset = (vm_offset_t)(upl_adjusted_offset(upl, PAGE_MASK) - object->paging_offset);
+ }
+
+ while (size) {
+ if (nxt_page != VM_PAGE_NULL) {
+ m = nxt_page;
+ nxt_page = (vm_page_t)vm_page_queue_next(&nxt_page->vmp_listq);
+ } else {
+ m = vm_page_lookup(object, offset);
+ offset += PAGE_SIZE;
+
+ if (m == VM_PAGE_NULL) {
+ panic("iopl_valid_data: missing expected page at offset %lx", (long)offset);
+ }
+ }
+ if (m->vmp_busy) {
+ if (!m->vmp_absent) {
+ panic("iopl_valid_data: busy page w/o absent");
+ }
+
+ if (m->vmp_pageq.next || m->vmp_pageq.prev) {
+ panic("iopl_valid_data: busy+absent page on page queue");
+ }
+ if (m->vmp_reusable) {
+ panic("iopl_valid_data: %p is reusable", m);
+ }
- return upl_commit_range(upl, 0, upl->size, 0, page_list, count, &empty);
+ m->vmp_absent = FALSE;
+ m->vmp_dirty = TRUE;
+ assert(m->vmp_q_state == VM_PAGE_NOT_ON_Q);
+ assert(m->vmp_wire_count == 0);
+ m->vmp_wire_count++;
+ assert(m->vmp_wire_count);
+ if (m->vmp_wire_count == 1) {
+ m->vmp_q_state = VM_PAGE_IS_WIRED;
+ wired_count++;
+ } else {
+ panic("iopl_valid_data: %p already wired\n", m);
+ }
+
+ PAGE_WAKEUP_DONE(m);
+ }
+ size -= PAGE_SIZE;
+ }
+ if (wired_count) {
+ VM_OBJECT_WIRED_PAGE_COUNT(object, wired_count);
+ assert(object->resident_page_count >= object->wired_page_count);
+
+ /* no need to adjust purgeable accounting for this object: */
+ assert(object->purgable != VM_PURGABLE_VOLATILE);
+ assert(object->purgable != VM_PURGABLE_EMPTY);
+
+ vm_page_lockspin_queues();
+ vm_page_wire_count += wired_count;
+ vm_page_unlock_queues();
+ }
+ VM_OBJECT_WIRED_PAGE_UPDATE_END(object, tag);
+ vm_object_unlock(object);
}
+
void
vm_object_set_pmap_cache_attr(
- vm_object_t object,
- upl_page_info_array_t user_page_list,
- unsigned int num_pages,
- boolean_t batch_pmap_op)
+ vm_object_t object,
+ upl_page_info_array_t user_page_list,
+ unsigned int num_pages,
+ boolean_t batch_pmap_op)
{
unsigned int cache_attr = 0;
}
}
-unsigned int vm_object_iopl_request_sleep_for_cleaning = 0;
+
+boolean_t vm_object_iopl_wire_full(vm_object_t, upl_t, upl_page_info_array_t, wpl_array_t, upl_control_flags_t, vm_tag_t);
+kern_return_t vm_object_iopl_wire_empty(vm_object_t, upl_t, upl_page_info_array_t, wpl_array_t, upl_control_flags_t, vm_tag_t, vm_object_offset_t *, int, int*);
+
+
+
+boolean_t
+vm_object_iopl_wire_full(vm_object_t object, upl_t upl, upl_page_info_array_t user_page_list,
+ wpl_array_t lite_list, upl_control_flags_t cntrl_flags, vm_tag_t tag)
+{
+ vm_page_t dst_page;
+ unsigned int entry;
+ int page_count;
+ int delayed_unlock = 0;
+ boolean_t retval = TRUE;
+ ppnum_t phys_page;
+
+ vm_object_lock_assert_exclusive(object);
+ assert(object->purgable != VM_PURGABLE_VOLATILE);
+ assert(object->purgable != VM_PURGABLE_EMPTY);
+ assert(object->pager == NULL);
+ assert(object->copy == NULL);
+ assert(object->shadow == NULL);
+
+ page_count = object->resident_page_count;
+ dst_page = (vm_page_t)vm_page_queue_first(&object->memq);
+
+ vm_page_lock_queues();
+
+ while (page_count--) {
+ if (dst_page->vmp_busy ||
+ dst_page->vmp_fictitious ||
+ dst_page->vmp_absent ||
+ dst_page->vmp_error ||
+ dst_page->vmp_cleaning ||
+ dst_page->vmp_restart ||
+ dst_page->vmp_laundry) {
+ retval = FALSE;
+ goto done;
+ }
+ if ((cntrl_flags & UPL_REQUEST_FORCE_COHERENCY) && dst_page->vmp_written_by_kernel == TRUE) {
+ retval = FALSE;
+ goto done;
+ }
+ dst_page->vmp_reference = TRUE;
+
+ vm_page_wire(dst_page, tag, FALSE);
+
+ if (!(cntrl_flags & UPL_COPYOUT_FROM)) {
+ SET_PAGE_DIRTY(dst_page, FALSE);
+ }
+ entry = (unsigned int)(dst_page->vmp_offset / PAGE_SIZE);
+ assert(entry >= 0 && entry < object->resident_page_count);
+ lite_list[entry >> 5] |= 1U << (entry & 31);
+
+ phys_page = VM_PAGE_GET_PHYS_PAGE(dst_page);
+
+ if (phys_page > upl->highest_page) {
+ upl->highest_page = phys_page;
+ }
+
+ if (user_page_list) {
+ user_page_list[entry].phys_addr = phys_page;
+ user_page_list[entry].absent = dst_page->vmp_absent;
+ user_page_list[entry].dirty = dst_page->vmp_dirty;
+ user_page_list[entry].free_when_done = dst_page->vmp_free_when_done;
+ user_page_list[entry].precious = dst_page->vmp_precious;
+ user_page_list[entry].device = FALSE;
+ user_page_list[entry].speculative = FALSE;
+ user_page_list[entry].cs_validated = FALSE;
+ user_page_list[entry].cs_tainted = FALSE;
+ user_page_list[entry].cs_nx = FALSE;
+ user_page_list[entry].needed = FALSE;
+ user_page_list[entry].mark = FALSE;
+ }
+ if (delayed_unlock++ > 256) {
+ delayed_unlock = 0;
+ lck_mtx_yield(&vm_page_queue_lock);
+
+ VM_CHECK_MEMORYSTATUS;
+ }
+ dst_page = (vm_page_t)vm_page_queue_next(&dst_page->vmp_listq);
+ }
+done:
+ vm_page_unlock_queues();
+
+ VM_CHECK_MEMORYSTATUS;
+
+ return retval;
+}
+
+
+kern_return_t
+vm_object_iopl_wire_empty(vm_object_t object, upl_t upl, upl_page_info_array_t user_page_list,
+ wpl_array_t lite_list, upl_control_flags_t cntrl_flags, vm_tag_t tag, vm_object_offset_t *dst_offset,
+ int page_count, int* page_grab_count)
+{
+ vm_page_t dst_page;
+ boolean_t no_zero_fill = FALSE;
+ int interruptible;
+ int pages_wired = 0;
+ int pages_inserted = 0;
+ int entry = 0;
+ uint64_t delayed_ledger_update = 0;
+ kern_return_t ret = KERN_SUCCESS;
+ int grab_options;
+ ppnum_t phys_page;
+
+ vm_object_lock_assert_exclusive(object);
+ assert(object->purgable != VM_PURGABLE_VOLATILE);
+ assert(object->purgable != VM_PURGABLE_EMPTY);
+ assert(object->pager == NULL);
+ assert(object->copy == NULL);
+ assert(object->shadow == NULL);
+
+ if (cntrl_flags & UPL_SET_INTERRUPTIBLE) {
+ interruptible = THREAD_ABORTSAFE;
+ } else {
+ interruptible = THREAD_UNINT;
+ }
+
+ if (cntrl_flags & (UPL_NOZEROFILL | UPL_NOZEROFILLIO)) {
+ no_zero_fill = TRUE;
+ }
+
+ grab_options = 0;
+#if CONFIG_SECLUDED_MEMORY
+ if (object->can_grab_secluded) {
+ grab_options |= VM_PAGE_GRAB_SECLUDED;
+ }
+#endif /* CONFIG_SECLUDED_MEMORY */
+
+ while (page_count--) {
+ while ((dst_page = vm_page_grab_options(grab_options))
+ == VM_PAGE_NULL) {
+ OSAddAtomic(page_count, &vm_upl_wait_for_pages);
+
+ VM_DEBUG_EVENT(vm_iopl_page_wait, VM_IOPL_PAGE_WAIT, DBG_FUNC_START, vm_upl_wait_for_pages, 0, 0, 0);
+
+ if (vm_page_wait(interruptible) == FALSE) {
+ /*
+ * interrupted case
+ */
+ OSAddAtomic(-page_count, &vm_upl_wait_for_pages);
+
+ VM_DEBUG_EVENT(vm_iopl_page_wait, VM_IOPL_PAGE_WAIT, DBG_FUNC_END, vm_upl_wait_for_pages, 0, 0, -1);
+
+ ret = MACH_SEND_INTERRUPTED;
+ goto done;
+ }
+ OSAddAtomic(-page_count, &vm_upl_wait_for_pages);
+
+ VM_DEBUG_EVENT(vm_iopl_page_wait, VM_IOPL_PAGE_WAIT, DBG_FUNC_END, vm_upl_wait_for_pages, 0, 0, 0);
+ }
+ if (no_zero_fill == FALSE) {
+ vm_page_zero_fill(dst_page);
+ } else {
+ dst_page->vmp_absent = TRUE;
+ }
+
+ dst_page->vmp_reference = TRUE;
+
+ if (!(cntrl_flags & UPL_COPYOUT_FROM)) {
+ SET_PAGE_DIRTY(dst_page, FALSE);
+ }
+ if (dst_page->vmp_absent == FALSE) {
+ assert(dst_page->vmp_q_state == VM_PAGE_NOT_ON_Q);
+ assert(dst_page->vmp_wire_count == 0);
+ dst_page->vmp_wire_count++;
+ dst_page->vmp_q_state = VM_PAGE_IS_WIRED;
+ assert(dst_page->vmp_wire_count);
+ pages_wired++;
+ PAGE_WAKEUP_DONE(dst_page);
+ }
+ pages_inserted++;
+
+ vm_page_insert_internal(dst_page, object, *dst_offset, tag, FALSE, TRUE, TRUE, TRUE, &delayed_ledger_update);
+
+ lite_list[entry >> 5] |= 1U << (entry & 31);
+
+ phys_page = VM_PAGE_GET_PHYS_PAGE(dst_page);
+
+ if (phys_page > upl->highest_page) {
+ upl->highest_page = phys_page;
+ }
+
+ if (user_page_list) {
+ user_page_list[entry].phys_addr = phys_page;
+ user_page_list[entry].absent = dst_page->vmp_absent;
+ user_page_list[entry].dirty = dst_page->vmp_dirty;
+ user_page_list[entry].free_when_done = FALSE;
+ user_page_list[entry].precious = FALSE;
+ user_page_list[entry].device = FALSE;
+ user_page_list[entry].speculative = FALSE;
+ user_page_list[entry].cs_validated = FALSE;
+ user_page_list[entry].cs_tainted = FALSE;
+ user_page_list[entry].cs_nx = FALSE;
+ user_page_list[entry].needed = FALSE;
+ user_page_list[entry].mark = FALSE;
+ }
+ entry++;
+ *dst_offset += PAGE_SIZE_64;
+ }
+done:
+ if (pages_wired) {
+ vm_page_lockspin_queues();
+ vm_page_wire_count += pages_wired;
+ vm_page_unlock_queues();
+ }
+ if (pages_inserted) {
+ if (object->internal) {
+ OSAddAtomic(pages_inserted, &vm_page_internal_count);
+ } else {
+ OSAddAtomic(pages_inserted, &vm_page_external_count);
+ }
+ }
+ if (delayed_ledger_update) {
+ task_t owner;
+ int ledger_idx_volatile;
+ int ledger_idx_nonvolatile;
+ int ledger_idx_volatile_compressed;
+ int ledger_idx_nonvolatile_compressed;
+ boolean_t do_footprint;
+
+ owner = VM_OBJECT_OWNER(object);
+ assert(owner);
+
+ vm_object_ledger_tag_ledgers(object,
+ &ledger_idx_volatile,
+ &ledger_idx_nonvolatile,
+ &ledger_idx_volatile_compressed,
+ &ledger_idx_nonvolatile_compressed,
+ &do_footprint);
+
+ /* more non-volatile bytes */
+ ledger_credit(owner->ledger,
+ ledger_idx_nonvolatile,
+ delayed_ledger_update);
+ if (do_footprint) {
+ /* more footprint */
+ ledger_credit(owner->ledger,
+ task_ledgers.phys_footprint,
+ delayed_ledger_update);
+ }
+ }
+
+ assert(page_grab_count);
+ *page_grab_count = pages_inserted;
+
+ return ret;
+}
+
+
kern_return_t
vm_object_iopl_request(
- vm_object_t object,
- vm_object_offset_t offset,
- upl_size_t size,
- upl_t *upl_ptr,
- upl_page_info_array_t user_page_list,
- unsigned int *page_list_count,
- int cntrl_flags)
+ vm_object_t object,
+ vm_object_offset_t offset,
+ upl_size_t size,
+ upl_t *upl_ptr,
+ upl_page_info_array_t user_page_list,
+ unsigned int *page_list_count,
+ upl_control_flags_t cntrl_flags,
+ vm_tag_t tag)
{
- vm_page_t dst_page;
- vm_object_offset_t dst_offset;
- upl_size_t xfer_size;
- upl_t upl = NULL;
- unsigned int entry;
- wpl_array_t lite_list = NULL;
- int no_zero_fill = FALSE;
- unsigned int size_in_pages;
- u_int32_t psize;
- kern_return_t ret;
- vm_prot_t prot;
- struct vm_object_fault_info fault_info;
- struct vm_page_delayed_work dw_array[DEFAULT_DELAYED_WORK_LIMIT];
- struct vm_page_delayed_work *dwp;
- int dw_count;
- int dw_limit;
- int dw_index;
- boolean_t caller_lookup;
+ vm_page_t dst_page;
+ vm_object_offset_t dst_offset;
+ upl_size_t xfer_size;
+ upl_t upl = NULL;
+ unsigned int entry;
+ wpl_array_t lite_list = NULL;
+ int no_zero_fill = FALSE;
+ unsigned int size_in_pages;
+ int page_grab_count = 0;
+ u_int32_t psize;
+ kern_return_t ret;
+ vm_prot_t prot;
+ struct vm_object_fault_info fault_info = {};
+ struct vm_page_delayed_work dw_array;
+ struct vm_page_delayed_work *dwp, *dwp_start;
+ bool dwp_finish_ctx = TRUE;
+ int dw_count;
+ int dw_limit;
+ int dw_index;
+ boolean_t caller_lookup;
+ int io_tracking_flag = 0;
+ int interruptible;
+ ppnum_t phys_page;
+
+ boolean_t set_cache_attr_needed = FALSE;
+ boolean_t free_wired_pages = FALSE;
+ boolean_t fast_path_empty_req = FALSE;
+ boolean_t fast_path_full_req = FALSE;
+
+#if DEVELOPMENT || DEBUG
+ task_t task = current_task();
+#endif /* DEVELOPMENT || DEBUG */
+
+ dwp_start = dwp = NULL;
+
+ vm_object_offset_t original_offset = offset;
+ upl_size_t original_size = size;
+
+// DEBUG4K_UPL("object %p offset 0x%llx size 0x%llx cntrl_flags 0x%llx\n", object, (uint64_t)offset, (uint64_t)size, cntrl_flags);
+
+ size = (upl_size_t)(vm_object_round_page(offset + size) - vm_object_trunc_page(offset));
+ offset = vm_object_trunc_page(offset);
+ if (size != original_size || offset != original_offset) {
+ DEBUG4K_IOKIT("flags 0x%llx object %p offset 0x%llx size 0x%x -> offset 0x%llx size 0x%x\n", cntrl_flags, object, original_offset, original_size, offset, size);
+ }
if (cntrl_flags & ~UPL_VALID_FLAGS) {
/*
*/
return KERN_INVALID_VALUE;
}
- if (vm_lopage_needed == FALSE)
- cntrl_flags &= ~UPL_NEED_32BIT_ADDR;
+ if (vm_lopage_needed == FALSE) {
+ cntrl_flags &= ~UPL_NEED_32BIT_ADDR;
+ }
if (cntrl_flags & UPL_NEED_32BIT_ADDR) {
- if ( (cntrl_flags & (UPL_SET_IO_WIRE | UPL_SET_LITE)) != (UPL_SET_IO_WIRE | UPL_SET_LITE))
- return KERN_INVALID_VALUE;
+ if ((cntrl_flags & (UPL_SET_IO_WIRE | UPL_SET_LITE)) != (UPL_SET_IO_WIRE | UPL_SET_LITE)) {
+ return KERN_INVALID_VALUE;
+ }
if (object->phys_contiguous) {
- if ((offset + object->vo_shadow_offset) >= (vm_object_offset_t)max_valid_dma_address)
- return KERN_INVALID_ADDRESS;
-
- if (((offset + object->vo_shadow_offset) + size) >= (vm_object_offset_t)max_valid_dma_address)
- return KERN_INVALID_ADDRESS;
+ if ((offset + object->vo_shadow_offset) >= (vm_object_offset_t)max_valid_dma_address) {
+ return KERN_INVALID_ADDRESS;
+ }
+
+ if (((offset + object->vo_shadow_offset) + size) >= (vm_object_offset_t)max_valid_dma_address) {
+ return KERN_INVALID_ADDRESS;
+ }
}
}
-
- if (cntrl_flags & UPL_ENCRYPT) {
- /*
- * ENCRYPTED SWAP:
- * The paging path doesn't use this interface,
- * so we don't support the UPL_ENCRYPT flag
- * here. We won't encrypt the pages.
- */
- assert(! (cntrl_flags & UPL_ENCRYPT));
+ if (cntrl_flags & (UPL_NOZEROFILL | UPL_NOZEROFILLIO)) {
+ no_zero_fill = TRUE;
}
- if (cntrl_flags & (UPL_NOZEROFILL | UPL_NOZEROFILLIO))
- no_zero_fill = TRUE;
- if (cntrl_flags & UPL_COPYOUT_FROM)
+ if (cntrl_flags & UPL_COPYOUT_FROM) {
prot = VM_PROT_READ;
- else
+ } else {
prot = VM_PROT_READ | VM_PROT_WRITE;
+ }
+
+ if ((!object->internal) && (object->paging_offset != 0)) {
+ panic("vm_object_iopl_request: external object with non-zero paging offset\n");
+ }
- if (((size/PAGE_SIZE) > MAX_UPL_SIZE) && !object->phys_contiguous)
- size = MAX_UPL_SIZE * PAGE_SIZE;
- if (cntrl_flags & UPL_SET_INTERNAL) {
- if (page_list_count != NULL)
- *page_list_count = MAX_UPL_SIZE;
+ VM_DEBUG_CONSTANT_EVENT(vm_object_iopl_request, VM_IOPL_REQUEST, DBG_FUNC_START, size, cntrl_flags, prot, 0);
+
+#if CONFIG_IOSCHED || UPL_DEBUG
+ if ((object->io_tracking && object != kernel_object) || upl_debug_enabled) {
+ io_tracking_flag |= UPL_CREATE_IO_TRACKING;
}
- if (((cntrl_flags & UPL_SET_INTERNAL) && !(object->phys_contiguous)) &&
- ((page_list_count != NULL) && (*page_list_count != 0) && *page_list_count < (size/page_size)))
- return KERN_INVALID_ARGUMENT;
+#endif
- if ((!object->internal) && (object->paging_offset != 0))
- panic("vm_object_iopl_request: external object with non-zero paging offset\n");
+#if CONFIG_IOSCHED
+ if (object->io_tracking) {
+ /* Check if we're dealing with the kernel object. We do not support expedite on kernel object UPLs */
+ if (object != kernel_object) {
+ io_tracking_flag |= UPL_CREATE_EXPEDITE_SUP;
+ }
+ }
+#endif
+
+ if (object->phys_contiguous) {
+ psize = PAGE_SIZE;
+ } else {
+ psize = size;
+ dw_count = 0;
+ dw_limit = DELAYED_WORK_LIMIT(DEFAULT_DELAYED_WORK_LIMIT);
+ dwp_start = vm_page_delayed_work_get_ctx();
+ if (dwp_start == NULL) {
+ dwp_start = &dw_array;
+ dw_limit = 1;
+ dwp_finish_ctx = FALSE;
+ }
- if (object->phys_contiguous)
- psize = PAGE_SIZE;
- else
- psize = size;
+ dwp = dwp_start;
+ }
if (cntrl_flags & UPL_SET_INTERNAL) {
- upl = upl_create(UPL_CREATE_INTERNAL | UPL_CREATE_LITE, UPL_IO_WIRE, psize);
+ upl = upl_create(UPL_CREATE_INTERNAL | UPL_CREATE_LITE | io_tracking_flag, UPL_IO_WIRE, psize);
user_page_list = (upl_page_info_t *) (((uintptr_t)upl) + sizeof(struct upl));
lite_list = (wpl_array_t) (((uintptr_t)user_page_list) +
- ((psize / PAGE_SIZE) * sizeof(upl_page_info_t)));
+ ((psize / PAGE_SIZE) * sizeof(upl_page_info_t)));
if (size == 0) {
user_page_list = NULL;
lite_list = NULL;
}
} else {
- upl = upl_create(UPL_CREATE_LITE, UPL_IO_WIRE, psize);
+ upl = upl_create(UPL_CREATE_LITE | io_tracking_flag, UPL_IO_WIRE, psize);
lite_list = (wpl_array_t) (((uintptr_t)upl) + sizeof(struct upl));
if (size == 0) {
lite_list = NULL;
}
}
- if (user_page_list)
- user_page_list[0].device = FALSE;
+ if (user_page_list) {
+ user_page_list[0].device = FALSE;
+ }
*upl_ptr = upl;
+ if (cntrl_flags & UPL_NOZEROFILLIO) {
+ DTRACE_VM4(upl_nozerofillio,
+ vm_object_t, object,
+ vm_object_offset_t, offset,
+ upl_size_t, size,
+ upl_t, upl);
+ }
+
upl->map_object = object;
- upl->size = size;
+ upl->u_offset = original_offset;
+ upl->u_size = original_size;
size_in_pages = size / PAGE_SIZE;
/*
* paging in progress also protects the paging_offset
*/
- upl->offset = offset + object->paging_offset;
+ upl->u_offset = original_offset + object->paging_offset;
if (cntrl_flags & UPL_BLOCK_ACCESS) {
/*
upl->flags |= UPL_ACCESS_BLOCKED;
}
- if (object->phys_contiguous) {
-#if UPL_DEBUG
+#if CONFIG_IOSCHED || UPL_DEBUG
+ if ((upl->flags & UPL_TRACKED_BY_OBJECT) || upl_debug_enabled) {
vm_object_activity_begin(object);
queue_enter(&object->uplq, upl, upl_t, uplq);
-#endif /* UPL_DEBUG */
+ }
+#endif
+ if (object->phys_contiguous) {
if (upl->flags & UPL_ACCESS_BLOCKED) {
assert(!object->blocked_access);
object->blocked_access = TRUE;
*/
upl->flags |= UPL_DEVICE_MEMORY;
- upl->highest_page = (ppnum_t) ((offset + object->vo_shadow_offset + size - 1)>>PAGE_SHIFT);
+ upl->highest_page = (ppnum_t) ((offset + object->vo_shadow_offset + size - 1) >> PAGE_SHIFT);
if (user_page_list) {
- user_page_list[0].phys_addr = (ppnum_t) ((offset + object->vo_shadow_offset)>>PAGE_SHIFT);
+ user_page_list[0].phys_addr = (ppnum_t) ((offset + object->vo_shadow_offset) >> PAGE_SHIFT);
user_page_list[0].device = TRUE;
}
if (page_list_count != NULL) {
- if (upl->flags & UPL_INTERNAL)
- *page_list_count = 0;
- else
- *page_list_count = 1;
+ if (upl->flags & UPL_INTERNAL) {
+ *page_list_count = 0;
+ } else {
+ *page_list_count = 1;
+ }
+ }
+
+ VM_DEBUG_CONSTANT_EVENT(vm_object_iopl_request, VM_IOPL_REQUEST, DBG_FUNC_END, page_grab_count, KERN_SUCCESS, 0, 0);
+#if DEVELOPMENT || DEBUG
+ if (task != NULL) {
+ ledger_credit(task->ledger, task_ledgers.pages_grabbed_iopl, page_grab_count);
}
+#endif /* DEVELOPMENT || DEBUG */
return KERN_SUCCESS;
}
if (object != kernel_object && object != compressor_object) {
/*
* Protect user space from future COW operations
*/
+#if VM_OBJECT_TRACKING_OP_TRUESHARE
+ if (!object->true_share &&
+ vm_object_tracking_inited) {
+ void *bt[VM_OBJECT_TRACKING_BTDEPTH];
+ int num = 0;
+
+ num = OSBacktrace(bt,
+ VM_OBJECT_TRACKING_BTDEPTH);
+ btlog_add_entry(vm_object_tracking_btlog,
+ object,
+ VM_OBJECT_TRACKING_OP_TRUESHARE,
+ bt,
+ num);
+ }
+#endif /* VM_OBJECT_TRACKING_OP_TRUESHARE */
+
+ vm_object_lock_assert_exclusive(object);
object->true_share = TRUE;
- if (object->copy_strategy == MEMORY_OBJECT_COPY_SYMMETRIC)
+ if (object->copy_strategy == MEMORY_OBJECT_COPY_SYMMETRIC) {
object->copy_strategy = MEMORY_OBJECT_COPY_DELAY;
+ }
}
-
-#if UPL_DEBUG
- vm_object_activity_begin(object);
- queue_enter(&object->uplq, upl, upl_t, uplq);
-#endif /* UPL_DEBUG */
if (!(cntrl_flags & UPL_COPYOUT_FROM) &&
object->copy != VM_OBJECT_NULL) {
* code path for that...
*/
vm_object_update(object,
- offset,
- size,
- NULL,
- NULL,
- FALSE, /* should_return */
- MEMORY_OBJECT_COPY_SYNC,
- VM_PROT_NO_CHANGE);
-#if DEVELOPMENT || DEBUG
- iopl_cow++;
- iopl_cow_pages += size >> PAGE_SHIFT;
-#endif
+ offset,
+ size,
+ NULL,
+ NULL,
+ FALSE, /* should_return */
+ MEMORY_OBJECT_COPY_SYNC,
+ VM_PROT_NO_CHANGE);
+ VM_PAGEOUT_DEBUG(iopl_cow, 1);
+ VM_PAGEOUT_DEBUG(iopl_cow_pages, (size >> PAGE_SHIFT));
+ }
+ if (!(cntrl_flags & (UPL_NEED_32BIT_ADDR | UPL_BLOCK_ACCESS)) &&
+ object->purgable != VM_PURGABLE_VOLATILE &&
+ object->purgable != VM_PURGABLE_EMPTY &&
+ object->copy == NULL &&
+ size == object->vo_size &&
+ offset == 0 &&
+ object->shadow == NULL &&
+ object->pager == NULL) {
+ if (object->resident_page_count == size_in_pages) {
+ assert(object != compressor_object);
+ assert(object != kernel_object);
+ fast_path_full_req = TRUE;
+ } else if (object->resident_page_count == 0) {
+ assert(object != compressor_object);
+ assert(object != kernel_object);
+ fast_path_empty_req = TRUE;
+ set_cache_attr_needed = TRUE;
+ }
+ }
+
+ if (cntrl_flags & UPL_SET_INTERRUPTIBLE) {
+ interruptible = THREAD_ABORTSAFE;
+ } else {
+ interruptible = THREAD_UNINT;
}
-
entry = 0;
xfer_size = size;
dst_offset = offset;
+ if (fast_path_full_req) {
+ if (vm_object_iopl_wire_full(object, upl, user_page_list, lite_list, cntrl_flags, tag) == TRUE) {
+ goto finish;
+ }
+ /*
+ * we couldn't complete the processing of this request on the fast path
+ * so fall through to the slow path and finish up
+ */
+ } else if (fast_path_empty_req) {
+ if (cntrl_flags & UPL_REQUEST_NO_FAULT) {
+ ret = KERN_MEMORY_ERROR;
+ goto return_err;
+ }
+ ret = vm_object_iopl_wire_empty(object, upl, user_page_list, lite_list, cntrl_flags, tag, &dst_offset, size_in_pages, &page_grab_count);
+
+ if (ret) {
+ free_wired_pages = TRUE;
+ goto return_err;
+ }
+ goto finish;
+ }
+
fault_info.behavior = VM_BEHAVIOR_SEQUENTIAL;
- fault_info.user_tag = 0;
fault_info.lo_offset = offset;
fault_info.hi_offset = offset + xfer_size;
- fault_info.no_cache = FALSE;
- fault_info.stealth = FALSE;
- fault_info.io_sync = FALSE;
- fault_info.cs_bypass = FALSE;
- fault_info.mark_zf_absent = (0 == (cntrl_flags & UPL_NOZEROFILLIO));
-
- dwp = &dw_array[0];
- dw_count = 0;
- dw_limit = DELAYED_WORK_LIMIT(DEFAULT_DELAYED_WORK_LIMIT);
+ fault_info.mark_zf_absent = TRUE;
+ fault_info.interruptible = interruptible;
+ fault_info.batch_pmap_op = TRUE;
while (xfer_size) {
- vm_fault_return_t result;
- unsigned int pg_num;
+ vm_fault_return_t result;
dwp->dw_mask = 0;
+ if (fast_path_full_req) {
+ /*
+ * if we get here, it means that we ran into a page
+ * state we couldn't handle in the fast path and
+ * bailed out to the slow path... since the order
+ * we look at pages is different between the 2 paths,
+ * the following check is needed to determine whether
+ * this page was already processed in the fast path
+ */
+ if (lite_list[entry >> 5] & (1 << (entry & 31))) {
+ goto skip_page;
+ }
+ }
dst_page = vm_page_lookup(object, dst_offset);
- /*
- * ENCRYPTED SWAP:
- * If the page is encrypted, we need to decrypt it,
- * so force a soft page fault.
- */
if (dst_page == VM_PAGE_NULL ||
- dst_page->busy ||
- dst_page->encrypted ||
- dst_page->error ||
- dst_page->restart ||
- dst_page->absent ||
- dst_page->fictitious) {
-
- if (object == kernel_object)
- panic("vm_object_iopl_request: missing/bad page in kernel object\n");
- if (object == compressor_object)
- panic("vm_object_iopl_request: missing/bad page in compressor object\n");
-
- if (cntrl_flags & UPL_REQUEST_NO_FAULT) {
- ret = KERN_MEMORY_ERROR;
- goto return_err;
- }
-
- /*
- * We just looked up the page and the result remains valid
- * until the object lock is release, so send it to
- * vm_fault_page() (as "dst_page"), to avoid having to
- * look it up again there.
- */
- caller_lookup = TRUE;
-
- do {
- vm_page_t top_page;
- kern_return_t error_code;
- int interruptible;
-
- if (cntrl_flags & UPL_SET_INTERRUPTIBLE)
- interruptible = THREAD_ABORTSAFE;
- else
- interruptible = THREAD_UNINT;
-
- fault_info.interruptible = interruptible;
- fault_info.cluster_size = xfer_size;
- fault_info.batch_pmap_op = TRUE;
-
- vm_object_paging_begin(object);
-
- result = vm_fault_page(object, dst_offset,
- prot | VM_PROT_WRITE, FALSE,
- caller_lookup,
- &prot, &dst_page, &top_page,
- (int *)0,
- &error_code, no_zero_fill,
- FALSE, &fault_info);
-
- /* our lookup is no longer valid at this point */
- caller_lookup = FALSE;
-
- switch (result) {
-
- case VM_FAULT_SUCCESS:
-
- if ( !dst_page->absent) {
- PAGE_WAKEUP_DONE(dst_page);
- } else {
+ dst_page->vmp_busy ||
+ dst_page->vmp_error ||
+ dst_page->vmp_restart ||
+ dst_page->vmp_absent ||
+ dst_page->vmp_fictitious) {
+ if (object == kernel_object) {
+ panic("vm_object_iopl_request: missing/bad page in kernel object\n");
+ }
+ if (object == compressor_object) {
+ panic("vm_object_iopl_request: missing/bad page in compressor object\n");
+ }
+
+ if (cntrl_flags & UPL_REQUEST_NO_FAULT) {
+ ret = KERN_MEMORY_ERROR;
+ goto return_err;
+ }
+ set_cache_attr_needed = TRUE;
+
+ /*
+ * We just looked up the page and the result remains valid
+ * until the object lock is release, so send it to
+ * vm_fault_page() (as "dst_page"), to avoid having to
+ * look it up again there.
+ */
+ caller_lookup = TRUE;
+
+ do {
+ vm_page_t top_page;
+ kern_return_t error_code;
+
+ fault_info.cluster_size = xfer_size;
+
+ vm_object_paging_begin(object);
+
+ result = vm_fault_page(object, dst_offset,
+ prot | VM_PROT_WRITE, FALSE,
+ caller_lookup,
+ &prot, &dst_page, &top_page,
+ (int *)0,
+ &error_code, no_zero_fill,
+ FALSE, &fault_info);
+
+ /* our lookup is no longer valid at this point */
+ caller_lookup = FALSE;
+
+ switch (result) {
+ case VM_FAULT_SUCCESS:
+ page_grab_count++;
+
+ if (!dst_page->vmp_absent) {
+ PAGE_WAKEUP_DONE(dst_page);
+ } else {
+ /*
+ * we only get back an absent page if we
+ * requested that it not be zero-filled
+ * because we are about to fill it via I/O
+ *
+ * absent pages should be left BUSY
+ * to prevent them from being faulted
+ * into an address space before we've
+ * had a chance to complete the I/O on
+ * them since they may contain info that
+ * shouldn't be seen by the faulting task
+ */
+ }
/*
- * we only get back an absent page if we
- * requested that it not be zero-filled
- * because we are about to fill it via I/O
- *
- * absent pages should be left BUSY
- * to prevent them from being faulted
- * into an address space before we've
- * had a chance to complete the I/O on
- * them since they may contain info that
- * shouldn't be seen by the faulting task
+ * Release paging references and
+ * top-level placeholder page, if any.
*/
- }
- /*
- * Release paging references and
- * top-level placeholder page, if any.
- */
- if (top_page != VM_PAGE_NULL) {
- vm_object_t local_object;
+ if (top_page != VM_PAGE_NULL) {
+ vm_object_t local_object;
- local_object = top_page->object;
+ local_object = VM_PAGE_OBJECT(top_page);
- if (top_page->object != dst_page->object) {
- vm_object_lock(local_object);
- VM_PAGE_FREE(top_page);
- vm_object_paging_end(local_object);
- vm_object_unlock(local_object);
- } else {
- VM_PAGE_FREE(top_page);
- vm_object_paging_end(local_object);
+ /*
+ * comparing 2 packed pointers
+ */
+ if (top_page->vmp_object != dst_page->vmp_object) {
+ vm_object_lock(local_object);
+ VM_PAGE_FREE(top_page);
+ vm_object_paging_end(local_object);
+ vm_object_unlock(local_object);
+ } else {
+ VM_PAGE_FREE(top_page);
+ vm_object_paging_end(local_object);
+ }
}
- }
- vm_object_paging_end(object);
- break;
-
- case VM_FAULT_RETRY:
- vm_object_lock(object);
- break;
+ vm_object_paging_end(object);
+ break;
- case VM_FAULT_MEMORY_SHORTAGE:
- OSAddAtomic(size_in_pages, &vm_upl_wait_for_pages);
+ case VM_FAULT_RETRY:
+ vm_object_lock(object);
+ break;
- VM_DEBUG_EVENT(vm_iopl_page_wait, VM_IOPL_PAGE_WAIT, DBG_FUNC_START, vm_upl_wait_for_pages, 0, 0, 0);
+ case VM_FAULT_MEMORY_SHORTAGE:
+ OSAddAtomic((size_in_pages - entry), &vm_upl_wait_for_pages);
- if (vm_page_wait(interruptible)) {
- OSAddAtomic(-size_in_pages, &vm_upl_wait_for_pages);
+ VM_DEBUG_EVENT(vm_iopl_page_wait, VM_IOPL_PAGE_WAIT, DBG_FUNC_START, vm_upl_wait_for_pages, 0, 0, 0);
- VM_DEBUG_EVENT(vm_iopl_page_wait, VM_IOPL_PAGE_WAIT, DBG_FUNC_END, vm_upl_wait_for_pages, 0, 0, 0);
- vm_object_lock(object);
+ if (vm_page_wait(interruptible)) {
+ OSAddAtomic(-(size_in_pages - entry), &vm_upl_wait_for_pages);
- break;
- }
- OSAddAtomic(-size_in_pages, &vm_upl_wait_for_pages);
+ VM_DEBUG_EVENT(vm_iopl_page_wait, VM_IOPL_PAGE_WAIT, DBG_FUNC_END, vm_upl_wait_for_pages, 0, 0, 0);
+ vm_object_lock(object);
- VM_DEBUG_EVENT(vm_iopl_page_wait, VM_IOPL_PAGE_WAIT, DBG_FUNC_END, vm_upl_wait_for_pages, 0, 0, -1);
+ break;
+ }
+ OSAddAtomic(-(size_in_pages - entry), &vm_upl_wait_for_pages);
- /* fall thru */
+ VM_DEBUG_EVENT(vm_iopl_page_wait, VM_IOPL_PAGE_WAIT, DBG_FUNC_END, vm_upl_wait_for_pages, 0, 0, -1);
- case VM_FAULT_INTERRUPTED:
- error_code = MACH_SEND_INTERRUPTED;
- case VM_FAULT_MEMORY_ERROR:
- memory_error:
- ret = (error_code ? error_code: KERN_MEMORY_ERROR);
+ OS_FALLTHROUGH;
- vm_object_lock(object);
- goto return_err;
+ case VM_FAULT_INTERRUPTED:
+ error_code = MACH_SEND_INTERRUPTED;
+ OS_FALLTHROUGH;
+ case VM_FAULT_MEMORY_ERROR:
+memory_error:
+ ret = (error_code ? error_code: KERN_MEMORY_ERROR);
- case VM_FAULT_SUCCESS_NO_VM_PAGE:
- /* success but no page: fail */
- vm_object_paging_end(object);
- vm_object_unlock(object);
- goto memory_error;
+ vm_object_lock(object);
+ goto return_err;
- default:
- panic("vm_object_iopl_request: unexpected error"
- " 0x%x from vm_fault_page()\n", result);
- }
- } while (result != VM_FAULT_SUCCESS);
+ case VM_FAULT_SUCCESS_NO_VM_PAGE:
+ /* success but no page: fail */
+ vm_object_paging_end(object);
+ vm_object_unlock(object);
+ goto memory_error;
+ default:
+ panic("vm_object_iopl_request: unexpected error"
+ " 0x%x from vm_fault_page()\n", result);
+ }
+ } while (result != VM_FAULT_SUCCESS);
}
- if (upl->flags & UPL_KERNEL_OBJECT)
+ phys_page = VM_PAGE_GET_PHYS_PAGE(dst_page);
+
+ if (upl->flags & UPL_KERNEL_OBJECT) {
goto record_phys_addr;
+ }
- if (dst_page->compressor) {
- dst_page->busy = TRUE;
+ if (dst_page->vmp_q_state == VM_PAGE_USED_BY_COMPRESSOR) {
+ dst_page->vmp_busy = TRUE;
goto record_phys_addr;
}
- if (dst_page->cleaning) {
+ if (dst_page->vmp_cleaning) {
/*
* Someone else is cleaning this page in place.
* In theory, we should be able to proceed and use this
* We'd better wait for the cleaning to complete and
* then try again.
*/
- vm_object_iopl_request_sleep_for_cleaning++;
+ VM_PAGEOUT_DEBUG(vm_object_iopl_request_sleep_for_cleaning, 1);
PAGE_SLEEP(object, dst_page, THREAD_UNINT);
continue;
}
- if (dst_page->laundry) {
- dst_page->pageout = FALSE;
-
+ if (dst_page->vmp_laundry) {
vm_pageout_steal_laundry(dst_page, FALSE);
- }
- if ( (cntrl_flags & UPL_NEED_32BIT_ADDR) &&
- dst_page->phys_page >= (max_valid_dma_address >> PAGE_SHIFT) ) {
- vm_page_t low_page;
- int refmod;
+ }
+
+ if ((cntrl_flags & UPL_NEED_32BIT_ADDR) &&
+ phys_page >= (max_valid_dma_address >> PAGE_SHIFT)) {
+ vm_page_t low_page;
+ int refmod;
/*
* support devices that can't DMA above 32 bits
* handed out to some other 64 bit capable DMA device to use
*/
if (VM_PAGE_WIRED(dst_page)) {
- ret = KERN_PROTECTION_FAILURE;
+ ret = KERN_PROTECTION_FAILURE;
goto return_err;
}
low_page = vm_page_grablo();
if (low_page == VM_PAGE_NULL) {
- ret = KERN_RESOURCE_SHORTAGE;
+ ret = KERN_RESOURCE_SHORTAGE;
goto return_err;
}
/*
* it after we disconnect it... we want the fault
* to find the new page being substituted.
*/
- if (dst_page->pmapped)
- refmod = pmap_disconnect(dst_page->phys_page);
- else
- refmod = 0;
+ if (dst_page->vmp_pmapped) {
+ refmod = pmap_disconnect(phys_page);
+ } else {
+ refmod = 0;
+ }
- if (!dst_page->absent)
+ if (!dst_page->vmp_absent) {
vm_page_copy(dst_page, low_page);
-
- low_page->reference = dst_page->reference;
- low_page->dirty = dst_page->dirty;
- low_page->absent = dst_page->absent;
+ }
+
+ low_page->vmp_reference = dst_page->vmp_reference;
+ low_page->vmp_dirty = dst_page->vmp_dirty;
+ low_page->vmp_absent = dst_page->vmp_absent;
- if (refmod & VM_MEM_REFERENCED)
- low_page->reference = TRUE;
+ if (refmod & VM_MEM_REFERENCED) {
+ low_page->vmp_reference = TRUE;
+ }
if (refmod & VM_MEM_MODIFIED) {
- SET_PAGE_DIRTY(low_page, FALSE);
+ SET_PAGE_DIRTY(low_page, FALSE);
}
vm_page_replace(low_page, object, dst_offset);
* BUSY... we don't need a PAGE_WAKEUP_DONE
* here, because we've never dropped the object lock
*/
- if ( !dst_page->absent)
- dst_page->busy = FALSE;
+ if (!dst_page->vmp_absent) {
+ dst_page->vmp_busy = FALSE;
+ }
+
+ phys_page = VM_PAGE_GET_PHYS_PAGE(dst_page);
}
- if ( !dst_page->busy)
+ if (!dst_page->vmp_busy) {
dwp->dw_mask |= DW_vm_page_wire;
+ }
if (cntrl_flags & UPL_BLOCK_ACCESS) {
/*
* We'll also remove the mapping
* of all these pages before leaving this routine.
*/
- assert(!dst_page->fictitious);
- dst_page->busy = TRUE;
+ assert(!dst_page->vmp_fictitious);
+ dst_page->vmp_busy = TRUE;
}
/*
* expect the page to be used
*/
dwp->dw_mask |= DW_set_reference;
- if (!(cntrl_flags & UPL_COPYOUT_FROM)) {
- SET_PAGE_DIRTY(dst_page, TRUE);
+ if (!(cntrl_flags & UPL_COPYOUT_FROM)) {
+ SET_PAGE_DIRTY(dst_page, TRUE);
+ /*
+ * Page belonging to a code-signed object is about to
+ * be written. Mark it tainted and disconnect it from
+ * all pmaps so processes have to fault it back in and
+ * deal with the tainted bit.
+ */
+ if (object->code_signed && dst_page->vmp_cs_tainted != VMP_CS_ALL_TRUE) {
+ dst_page->vmp_cs_tainted = VMP_CS_ALL_TRUE;
+ vm_page_iopl_tainted++;
+ if (dst_page->vmp_pmapped) {
+ int refmod = pmap_disconnect(VM_PAGE_GET_PHYS_PAGE(dst_page));
+ if (refmod & VM_MEM_REFERENCED) {
+ dst_page->vmp_reference = TRUE;
+ }
+ }
+ }
}
- if ((cntrl_flags & UPL_REQUEST_FORCE_COHERENCY) && dst_page->written_by_kernel == TRUE) {
- pmap_sync_page_attributes_phys(dst_page->phys_page);
- dst_page->written_by_kernel = FALSE;
+ if ((cntrl_flags & UPL_REQUEST_FORCE_COHERENCY) && dst_page->vmp_written_by_kernel == TRUE) {
+ pmap_sync_page_attributes_phys(phys_page);
+ dst_page->vmp_written_by_kernel = FALSE;
}
record_phys_addr:
- if (dst_page->busy)
+ if (dst_page->vmp_busy) {
upl->flags |= UPL_HAS_BUSY;
+ }
- pg_num = (unsigned int) ((dst_offset-offset)/PAGE_SIZE);
- assert(pg_num == (dst_offset-offset)/PAGE_SIZE);
- lite_list[pg_num>>5] |= 1 << (pg_num & 31);
+ lite_list[entry >> 5] |= 1U << (entry & 31);
- if (dst_page->phys_page > upl->highest_page)
- upl->highest_page = dst_page->phys_page;
+ if (phys_page > upl->highest_page) {
+ upl->highest_page = phys_page;
+ }
if (user_page_list) {
- user_page_list[entry].phys_addr = dst_page->phys_page;
- user_page_list[entry].pageout = dst_page->pageout;
- user_page_list[entry].absent = dst_page->absent;
- user_page_list[entry].dirty = dst_page->dirty;
- user_page_list[entry].precious = dst_page->precious;
- user_page_list[entry].device = FALSE;
+ user_page_list[entry].phys_addr = phys_page;
+ user_page_list[entry].free_when_done = dst_page->vmp_free_when_done;
+ user_page_list[entry].absent = dst_page->vmp_absent;
+ user_page_list[entry].dirty = dst_page->vmp_dirty;
+ user_page_list[entry].precious = dst_page->vmp_precious;
+ user_page_list[entry].device = FALSE;
user_page_list[entry].needed = FALSE;
- if (dst_page->clustered == TRUE)
- user_page_list[entry].speculative = dst_page->speculative;
- else
- user_page_list[entry].speculative = FALSE;
- user_page_list[entry].cs_validated = dst_page->cs_validated;
- user_page_list[entry].cs_tainted = dst_page->cs_tainted;
+ if (dst_page->vmp_clustered == TRUE) {
+ user_page_list[entry].speculative = (dst_page->vmp_q_state == VM_PAGE_ON_SPECULATIVE_Q) ? TRUE : FALSE;
+ } else {
+ user_page_list[entry].speculative = FALSE;
+ }
+ user_page_list[entry].cs_validated = dst_page->vmp_cs_validated;
+ user_page_list[entry].cs_tainted = dst_page->vmp_cs_tainted;
+ user_page_list[entry].cs_nx = dst_page->vmp_cs_nx;
+ user_page_list[entry].mark = FALSE;
}
if (object != kernel_object && object != compressor_object) {
/*
* someone is explicitly grabbing this page...
* update clustered and speculative state
- *
+ *
*/
- VM_PAGE_CONSUME_CLUSTERED(dst_page);
+ if (dst_page->vmp_clustered) {
+ VM_PAGE_CONSUME_CLUSTERED(dst_page);
+ }
}
+skip_page:
entry++;
dst_offset += PAGE_SIZE_64;
xfer_size -= PAGE_SIZE;
VM_PAGE_ADD_DELAYED_WORK(dwp, dst_page, dw_count);
if (dw_count >= dw_limit) {
- vm_page_do_delayed_work(object, &dw_array[0], dw_count);
-
- dwp = &dw_array[0];
+ vm_page_do_delayed_work(object, tag, dwp_start, dw_count);
+
+ dwp = dwp_start;
dw_count = 0;
}
}
}
- if (dw_count)
- vm_page_do_delayed_work(object, &dw_array[0], dw_count);
+ assert(entry == size_in_pages);
- vm_object_set_pmap_cache_attr(object, user_page_list, entry, TRUE);
+ if (dw_count) {
+ vm_page_do_delayed_work(object, tag, dwp_start, dw_count);
+ dwp = dwp_start;
+ dw_count = 0;
+ }
+finish:
+ if (user_page_list && set_cache_attr_needed == TRUE) {
+ vm_object_set_pmap_cache_attr(object, user_page_list, size_in_pages, TRUE);
+ }
if (page_list_count != NULL) {
- if (upl->flags & UPL_INTERNAL)
+ if (upl->flags & UPL_INTERNAL) {
*page_list_count = 0;
- else if (*page_list_count > entry)
- *page_list_count = entry;
+ } else if (*page_list_count > size_in_pages) {
+ *page_list_count = size_in_pages;
+ }
}
vm_object_unlock(object);
* can't be accessed without causing a page fault.
*/
vm_object_pmap_protect(object, offset, (vm_object_size_t)size,
- PMAP_NULL, 0, VM_PROT_NONE);
+ PMAP_NULL,
+ PAGE_SIZE,
+ 0, VM_PROT_NONE);
assert(!object->blocked_access);
object->blocked_access = TRUE;
}
+
+ VM_DEBUG_CONSTANT_EVENT(vm_object_iopl_request, VM_IOPL_REQUEST, DBG_FUNC_END, page_grab_count, KERN_SUCCESS, 0, 0);
+#if DEVELOPMENT || DEBUG
+ if (task != NULL) {
+ ledger_credit(task->ledger, task_ledgers.pages_grabbed_iopl, page_grab_count);
+ }
+#endif /* DEVELOPMENT || DEBUG */
+
+ if (dwp_start && dwp_finish_ctx) {
+ vm_page_delayed_work_finish_ctx(dwp_start);
+ dwp_start = dwp = NULL;
+ }
+
return KERN_SUCCESS;
return_err:
for (; offset < dst_offset; offset += PAGE_SIZE) {
boolean_t need_unwire;
- dst_page = vm_page_lookup(object, offset);
+ dst_page = vm_page_lookup(object, offset);
- if (dst_page == VM_PAGE_NULL)
- panic("vm_object_iopl_request: Wired page missing. \n");
+ if (dst_page == VM_PAGE_NULL) {
+ panic("vm_object_iopl_request: Wired page missing. \n");
+ }
/*
- * if we've already processed this page in an earlier
+ * if we've already processed this page in an earlier
* dw_do_work, we need to undo the wiring... we will
* leave the dirty and reference bits on if they
* were set, since we don't have a good way of knowing
need_unwire = TRUE;
if (dw_count) {
- if (dw_array[dw_index].dw_m == dst_page) {
+ if ((dwp_start)[dw_index].dw_m == dst_page) {
/*
* still in the deferred work list
* which means we haven't yet called
}
vm_page_lock_queues();
- if (dst_page->absent) {
+ if (dst_page->vmp_absent || free_wired_pages == TRUE) {
vm_page_free(dst_page);
need_unwire = FALSE;
} else {
- if (need_unwire == TRUE)
+ if (need_unwire == TRUE) {
vm_page_unwire(dst_page, TRUE);
+ }
PAGE_WAKEUP_DONE(dst_page);
}
vm_page_unlock_queues();
- if (need_unwire == TRUE)
+ if (need_unwire == TRUE) {
VM_STAT_INCR(reactivations);
+ }
}
#if UPL_DEBUG
upl->upl_state = 2;
#endif
- if (! (upl->flags & UPL_KERNEL_OBJECT)) {
+ if (!(upl->flags & UPL_KERNEL_OBJECT)) {
vm_object_activity_end(object);
vm_object_collapse(object, 0, TRUE);
}
vm_object_unlock(object);
upl_destroy(upl);
+ VM_DEBUG_CONSTANT_EVENT(vm_object_iopl_request, VM_IOPL_REQUEST, DBG_FUNC_END, page_grab_count, ret, 0, 0);
+#if DEVELOPMENT || DEBUG
+ if (task != NULL) {
+ ledger_credit(task->ledger, task_ledgers.pages_grabbed_iopl, page_grab_count);
+ }
+#endif /* DEVELOPMENT || DEBUG */
+
+ if (dwp_start && dwp_finish_ctx) {
+ vm_page_delayed_work_finish_ctx(dwp_start);
+ dwp_start = dwp = NULL;
+ }
return ret;
}
kern_return_t
upl_transpose(
- upl_t upl1,
- upl_t upl2)
+ upl_t upl1,
+ upl_t upl2)
{
- kern_return_t retval;
- boolean_t upls_locked;
- vm_object_t object1, object2;
+ kern_return_t retval;
+ boolean_t upls_locked;
+ vm_object_t object1, object2;
- if (upl1 == UPL_NULL || upl2 == UPL_NULL || upl1 == upl2 || ((upl1->flags & UPL_VECTOR)==UPL_VECTOR) || ((upl2->flags & UPL_VECTOR)==UPL_VECTOR)) {
+ if (upl1 == UPL_NULL || upl2 == UPL_NULL || upl1 == upl2 || ((upl1->flags & UPL_VECTOR) == UPL_VECTOR) || ((upl2->flags & UPL_VECTOR) == UPL_VECTOR)) {
return KERN_INVALID_ARGUMENT;
}
-
+
upls_locked = FALSE;
/*
upl_lock(upl2);
upl_lock(upl1);
}
- upls_locked = TRUE; /* the UPLs will need to be unlocked */
+ upls_locked = TRUE; /* the UPLs will need to be unlocked */
object1 = upl1->map_object;
object2 = upl2->map_object;
- if (upl1->offset != 0 || upl2->offset != 0 ||
- upl1->size != upl2->size) {
+ if (upl1->u_offset != 0 || upl2->u_offset != 0 ||
+ upl1->u_size != upl2->u_size) {
/*
* We deal only with full objects, not subsets.
* That's because we exchange the entire backing store info
* Tranpose the VM objects' backing store.
*/
retval = vm_object_transpose(object1, object2,
- (vm_object_size_t) upl1->size);
+ upl_adjusted_size(upl1, PAGE_MASK));
if (retval == KERN_SUCCESS) {
/*
* Make each UPL point to the correct VM object, i.e. the
* object holding the pages that the UPL refers to...
*/
-#if UPL_DEBUG
- queue_remove(&object1->uplq, upl1, upl_t, uplq);
- queue_remove(&object2->uplq, upl2, upl_t, uplq);
+#if CONFIG_IOSCHED || UPL_DEBUG
+ if ((upl1->flags & UPL_TRACKED_BY_OBJECT) || (upl2->flags & UPL_TRACKED_BY_OBJECT)) {
+ vm_object_lock(object1);
+ vm_object_lock(object2);
+ }
+ if ((upl1->flags & UPL_TRACKED_BY_OBJECT) || upl_debug_enabled) {
+ queue_remove(&object1->uplq, upl1, upl_t, uplq);
+ }
+ if ((upl2->flags & UPL_TRACKED_BY_OBJECT) || upl_debug_enabled) {
+ queue_remove(&object2->uplq, upl2, upl_t, uplq);
+ }
#endif
upl1->map_object = object2;
upl2->map_object = object1;
-#if UPL_DEBUG
- queue_enter(&object1->uplq, upl2, upl_t, uplq);
- queue_enter(&object2->uplq, upl1, upl_t, uplq);
+
+#if CONFIG_IOSCHED || UPL_DEBUG
+ if ((upl1->flags & UPL_TRACKED_BY_OBJECT) || upl_debug_enabled) {
+ queue_enter(&object2->uplq, upl1, upl_t, uplq);
+ }
+ if ((upl2->flags & UPL_TRACKED_BY_OBJECT) || upl_debug_enabled) {
+ queue_enter(&object1->uplq, upl2, upl_t, uplq);
+ }
+ if ((upl1->flags & UPL_TRACKED_BY_OBJECT) || (upl2->flags & UPL_TRACKED_BY_OBJECT)) {
+ vm_object_unlock(object2);
+ vm_object_unlock(object1);
+ }
#endif
}
void
upl_range_needed(
- upl_t upl,
- int index,
- int count)
+ upl_t upl,
+ int index,
+ int count)
{
- upl_page_info_t *user_page_list;
- int size_in_pages;
+ upl_page_info_t *user_page_list;
+ int size_in_pages;
- if ( !(upl->flags & UPL_INTERNAL) || count <= 0)
+ if (!(upl->flags & UPL_INTERNAL) || count <= 0) {
return;
+ }
- size_in_pages = upl->size / PAGE_SIZE;
+ size_in_pages = upl_adjusted_size(upl, PAGE_MASK) / PAGE_SIZE;
user_page_list = (upl_page_info_t *) (((uintptr_t)upl) + sizeof(struct upl));
- while (count-- && index < size_in_pages)
+ while (count-- && index < size_in_pages) {
user_page_list[index++].needed = TRUE;
+ }
}
/*
- * ENCRYPTED SWAP:
- *
- * Rationale: the user might have some encrypted data on disk (via
- * FileVault or any other mechanism). That data is then decrypted in
- * memory, which is safe as long as the machine is secure. But that
- * decrypted data in memory could be paged out to disk by the default
- * pager. The data would then be stored on disk in clear (not encrypted)
- * and it could be accessed by anyone who gets physical access to the
- * disk (if the laptop or the disk gets stolen for example). This weakens
- * the security offered by FileVault.
- *
- * Solution: the default pager will optionally request that all the
- * pages it gathers for pageout be encrypted, via the UPL interfaces,
- * before it sends this UPL to disk via the vnode_pageout() path.
- *
- * Notes:
- *
- * To avoid disrupting the VM LRU algorithms, we want to keep the
- * clean-in-place mechanisms, which allow us to send some extra pages to
- * swap (clustering) without actually removing them from the user's
- * address space. We don't want the user to unknowingly access encrypted
- * data, so we have to actually remove the encrypted pages from the page
- * table. When the user accesses the data, the hardware will fail to
- * locate the virtual page in its page table and will trigger a page
- * fault. We can then decrypt the page and enter it in the page table
- * again. Whenever we allow the user to access the contents of a page,
- * we have to make sure it's not encrypted.
- *
- *
- */
-/*
- * ENCRYPTED SWAP:
* Reserve of virtual addresses in the kernel address space.
* We need to map the physical pages in the kernel, so that we
- * can call the encryption/decryption routines with a kernel
+ * can call the code-signing or slide routines with a kernel
* virtual address. We keep this pool of pre-allocated kernel
* virtual addresses so that we don't have to scan the kernel's
- * virtaul address space each time we need to encrypt or decrypt
+ * virtaul address space each time we need to work with
* a physical page.
- * It would be nice to be able to encrypt and decrypt in physical
- * mode but that might not always be more efficient...
*/
-decl_simple_lock_data(,vm_paging_lock)
-#define VM_PAGING_NUM_PAGES 64
+SIMPLE_LOCK_DECLARE(vm_paging_lock, 0);
+#define VM_PAGING_NUM_PAGES 64
vm_map_offset_t vm_paging_base_address = 0;
-boolean_t vm_paging_page_inuse[VM_PAGING_NUM_PAGES] = { FALSE, };
-int vm_paging_max_index = 0;
-int vm_paging_page_waiter = 0;
-int vm_paging_page_waiter_total = 0;
-unsigned long vm_paging_no_kernel_page = 0;
-unsigned long vm_paging_objects_mapped = 0;
-unsigned long vm_paging_pages_mapped = 0;
-unsigned long vm_paging_objects_mapped_slow = 0;
-unsigned long vm_paging_pages_mapped_slow = 0;
-
+boolean_t vm_paging_page_inuse[VM_PAGING_NUM_PAGES] = { FALSE, };
+int vm_paging_max_index = 0;
+int vm_paging_page_waiter = 0;
+int vm_paging_page_waiter_total = 0;
+
+unsigned long vm_paging_no_kernel_page = 0;
+unsigned long vm_paging_objects_mapped = 0;
+unsigned long vm_paging_pages_mapped = 0;
+unsigned long vm_paging_objects_mapped_slow = 0;
+unsigned long vm_paging_pages_mapped_slow = 0;
+
+__startup_func
void
vm_paging_map_init(void)
{
- kern_return_t kr;
- vm_map_offset_t page_map_offset;
- vm_map_entry_t map_entry;
+ kern_return_t kr;
+ vm_map_offset_t page_map_offset;
+ vm_map_entry_t map_entry;
assert(vm_paging_base_address == 0);
*/
page_map_offset = 0;
kr = vm_map_find_space(kernel_map,
- &page_map_offset,
- VM_PAGING_NUM_PAGES * PAGE_SIZE,
- 0,
- 0,
- &map_entry);
+ &page_map_offset,
+ VM_PAGING_NUM_PAGES * PAGE_SIZE,
+ 0,
+ 0,
+ VM_MAP_KERNEL_FLAGS_NONE,
+ VM_KERN_MEMORY_NONE,
+ &map_entry);
if (kr != KERN_SUCCESS) {
panic("vm_paging_map_init: kernel_map full\n");
}
- map_entry->object.vm_object = kernel_object;
- map_entry->offset = page_map_offset;
+ VME_OBJECT_SET(map_entry, kernel_object);
+ VME_OFFSET_SET(map_entry, page_map_offset);
map_entry->protection = VM_PROT_NONE;
map_entry->max_protection = VM_PROT_NONE;
map_entry->permanent = TRUE;
}
/*
- * ENCRYPTED SWAP:
* vm_paging_map_object:
* Maps part of a VM object's pages in the kernel
- * virtual address space, using the pre-allocated
+ * virtual address space, using the pre-allocated
* kernel virtual addresses, if possible.
* Context:
- * The VM object is locked. This lock will get
- * dropped and re-acquired though, so the caller
- * must make sure the VM object is kept alive
+ * The VM object is locked. This lock will get
+ * dropped and re-acquired though, so the caller
+ * must make sure the VM object is kept alive
* (by holding a VM map that has a reference
- * on it, for example, or taking an extra reference).
- * The page should also be kept busy to prevent
+ * on it, for example, or taking an extra reference).
+ * The page should also be kept busy to prevent
* it from being reclaimed.
*/
kern_return_t
vm_paging_map_object(
- vm_page_t page,
- vm_object_t object,
- vm_object_offset_t offset,
- vm_prot_t protection,
- boolean_t can_unlock_object,
- vm_map_size_t *size, /* IN/OUT */
- vm_map_offset_t *address, /* OUT */
- boolean_t *need_unmap) /* OUT */
+ vm_page_t page,
+ vm_object_t object,
+ vm_object_offset_t offset,
+ vm_prot_t protection,
+ boolean_t can_unlock_object,
+ vm_map_size_t *size, /* IN/OUT */
+ vm_map_offset_t *address, /* OUT */
+ boolean_t *need_unmap) /* OUT */
{
- kern_return_t kr;
- vm_map_offset_t page_map_offset;
- vm_map_size_t map_size;
- vm_object_offset_t object_offset;
- int i;
+ kern_return_t kr;
+ vm_map_offset_t page_map_offset;
+ vm_map_size_t map_size;
+ vm_object_offset_t object_offset;
+ int i;
if (page != VM_PAGE_NULL && *size == PAGE_SIZE) {
/* use permanent 1-to-1 kernel mapping of physical memory ? */
-#if __x86_64__
*address = (vm_map_offset_t)
- PHYSMAP_PTOV((pmap_paddr_t)page->phys_page <<
- PAGE_SHIFT);
+ phystokv((pmap_paddr_t)VM_PAGE_GET_PHYS_PAGE(page) << PAGE_SHIFT);
*need_unmap = FALSE;
return KERN_SUCCESS;
-#else
-#warn "vm_paging_map_object: no 1-to-1 kernel mapping of physical memory..."
-#endif
- assert(page->busy);
+ assert(page->vmp_busy);
/*
* Use one of the pre-allocated kernel virtual addresses
* and just enter the VM page in the kernel address space
* at that virtual address.
*/
- simple_lock(&vm_paging_lock);
+ simple_lock(&vm_paging_lock, &vm_pageout_lck_grp);
/*
* Try and find an available kernel virtual address
for (i = 0; i < VM_PAGING_NUM_PAGES; i++) {
if (vm_paging_page_inuse[i] == FALSE) {
page_map_offset =
- vm_paging_base_address +
- (i * PAGE_SIZE);
+ vm_paging_base_address +
+ (i * PAGE_SIZE);
break;
}
}
*/
vm_paging_page_waiter_total++;
vm_paging_page_waiter++;
- thread_sleep_fast_usimple_lock(&vm_paging_page_waiter,
- &vm_paging_lock,
- THREAD_UNINT);
+ kr = assert_wait((event_t)&vm_paging_page_waiter, THREAD_UNINT);
+ if (kr == THREAD_WAITING) {
+ simple_unlock(&vm_paging_lock);
+ kr = thread_block(THREAD_CONTINUE_NULL);
+ simple_lock(&vm_paging_lock, &vm_pageout_lck_grp);
+ }
vm_paging_page_waiter--;
/* ... and try again */
}
vm_paging_page_inuse[i] = TRUE;
simple_unlock(&vm_paging_lock);
- page->pmapped = TRUE;
+ page->vmp_pmapped = TRUE;
/*
* Keep the VM object locked over the PMAP_ENTER
* and the actual use of the page by the kernel,
- * or this pmap mapping might get undone by a
+ * or this pmap mapping might get undone by a
* vm_object_pmap_protect() call...
*/
PMAP_ENTER(kernel_pmap,
- page_map_offset,
- page,
- protection,
- VM_PROT_NONE,
- 0,
- TRUE);
+ page_map_offset,
+ page,
+ protection,
+ VM_PROT_NONE,
+ 0,
+ TRUE,
+ kr);
+ assert(kr == KERN_SUCCESS);
vm_paging_objects_mapped++;
- vm_paging_pages_mapped++;
+ vm_paging_pages_mapped++;
*address = page_map_offset;
*need_unmap = TRUE;
+#if KASAN
+ kasan_notify_address(page_map_offset, PAGE_SIZE);
+#endif
+
/* all done and mapped, ready to use ! */
return KERN_SUCCESS;
}
simple_unlock(&vm_paging_lock);
}
- if (! can_unlock_object) {
+ if (!can_unlock_object) {
*address = 0;
*size = 0;
*need_unmap = FALSE;
object_offset = vm_object_trunc_page(offset);
map_size = vm_map_round_page(*size,
- VM_MAP_PAGE_MASK(kernel_map));
+ VM_MAP_PAGE_MASK(kernel_map));
/*
* Try and map the required range of the object
* in the kernel_map
*/
- vm_object_reference_locked(object); /* for the map entry */
+ vm_object_reference_locked(object); /* for the map entry */
vm_object_unlock(object);
kr = vm_map_enter(kernel_map,
- address,
- map_size,
- 0,
- VM_FLAGS_ANYWHERE,
- object,
- object_offset,
- FALSE,
- protection,
- VM_PROT_ALL,
- VM_INHERIT_NONE);
+ address,
+ map_size,
+ 0,
+ VM_FLAGS_ANYWHERE,
+ VM_MAP_KERNEL_FLAGS_NONE,
+ VM_KERN_MEMORY_NONE,
+ object,
+ object_offset,
+ FALSE,
+ protection,
+ VM_PROT_ALL,
+ VM_INHERIT_NONE);
if (kr != KERN_SUCCESS) {
*address = 0;
*size = 0;
*need_unmap = FALSE;
- vm_object_deallocate(object); /* for the map entry */
+ vm_object_deallocate(object); /* for the map entry */
vm_object_lock(object);
return kr;
}
*/
for (page_map_offset = 0;
- map_size != 0;
- map_size -= PAGE_SIZE_64, page_map_offset += PAGE_SIZE_64) {
-
+ map_size != 0;
+ map_size -= PAGE_SIZE_64, page_map_offset += PAGE_SIZE_64) {
page = vm_page_lookup(object, offset + page_map_offset);
if (page == VM_PAGE_NULL) {
printf("vm_paging_map_object: no page !?");
vm_object_unlock(object);
kr = vm_map_remove(kernel_map, *address, *size,
- VM_MAP_NO_FLAGS);
+ VM_MAP_REMOVE_NO_FLAGS);
assert(kr == KERN_SUCCESS);
*address = 0;
*size = 0;
vm_object_lock(object);
return KERN_MEMORY_ERROR;
}
- page->pmapped = TRUE;
+ page->vmp_pmapped = TRUE;
- //assert(pmap_verify_free(page->phys_page));
+ //assert(pmap_verify_free(VM_PAGE_GET_PHYS_PAGE(page)));
PMAP_ENTER(kernel_pmap,
- *address + page_map_offset,
- page,
- protection,
- VM_PROT_NONE,
- 0,
- TRUE);
- }
-
+ *address + page_map_offset,
+ page,
+ protection,
+ VM_PROT_NONE,
+ 0,
+ TRUE,
+ kr);
+ assert(kr == KERN_SUCCESS);
+#if KASAN
+ kasan_notify_address(*address + page_map_offset, PAGE_SIZE);
+#endif
+ }
+
vm_paging_objects_mapped_slow++;
vm_paging_pages_mapped_slow += (unsigned long) (map_size / PAGE_SIZE_64);
}
/*
- * ENCRYPTED SWAP:
* vm_paging_unmap_object:
* Unmaps part of a VM object's pages from the kernel
- * virtual address space.
+ * virtual address space.
* Context:
- * The VM object is locked. This lock will get
- * dropped and re-acquired though.
+ * The VM object is locked. This lock will get
+ * dropped and re-acquired though.
*/
void
vm_paging_unmap_object(
- vm_object_t object,
- vm_map_offset_t start,
- vm_map_offset_t end)
+ vm_object_t object,
+ vm_map_offset_t start,
+ vm_map_offset_t end)
{
- kern_return_t kr;
- int i;
+ kern_return_t kr;
+ int i;
if ((vm_paging_base_address == 0) ||
(start < vm_paging_base_address) ||
(end > (vm_paging_base_address
- + (VM_PAGING_NUM_PAGES * PAGE_SIZE)))) {
+ + (VM_PAGING_NUM_PAGES * PAGE_SIZE)))) {
/*
* We didn't use our pre-allocated pool of
* kernel virtual address. Deallocate the
if (object != VM_OBJECT_NULL) {
vm_object_unlock(object);
}
- kr = vm_map_remove(kernel_map, start, end, VM_MAP_NO_FLAGS);
+ kr = vm_map_remove(kernel_map, start, end,
+ VM_MAP_REMOVE_NO_FLAGS);
if (object != VM_OBJECT_NULL) {
vm_object_lock(object);
}
/* undo the pmap mapping */
pmap_remove(kernel_pmap, start, end);
- simple_lock(&vm_paging_lock);
+ simple_lock(&vm_paging_lock, &vm_pageout_lck_grp);
vm_paging_page_inuse[i] = FALSE;
if (vm_paging_page_waiter) {
thread_wakeup(&vm_paging_page_waiter);
}
}
-#if CRYPTO
-/*
- * Encryption data.
- * "iv" is the "initial vector". Ideally, we want to
- * have a different one for each page we encrypt, so that
- * crackers can't find encryption patterns too easily.
- */
-#define SWAP_CRYPT_AES_KEY_SIZE 128 /* XXX 192 and 256 don't work ! */
-boolean_t swap_crypt_ctx_initialized = FALSE;
-uint32_t swap_crypt_key[8]; /* big enough for a 256 key */
-aes_ctx swap_crypt_ctx;
-const unsigned char swap_crypt_null_iv[AES_BLOCK_SIZE] = {0xa, };
-
-#if DEBUG
-boolean_t swap_crypt_ctx_tested = FALSE;
-unsigned char swap_crypt_test_page_ref[4096] __attribute__((aligned(4096)));
-unsigned char swap_crypt_test_page_encrypt[4096] __attribute__((aligned(4096)));
-unsigned char swap_crypt_test_page_decrypt[4096] __attribute__((aligned(4096)));
-#endif /* DEBUG */
-
-/*
- * Initialize the encryption context: key and key size.
- */
-void swap_crypt_ctx_initialize(void); /* forward */
-void
-swap_crypt_ctx_initialize(void)
-{
- unsigned int i;
-
- /*
- * No need for locking to protect swap_crypt_ctx_initialized
- * because the first use of encryption will come from the
- * pageout thread (we won't pagein before there's been a pageout)
- * and there's only one pageout thread.
- */
- if (swap_crypt_ctx_initialized == FALSE) {
- for (i = 0;
- i < (sizeof (swap_crypt_key) /
- sizeof (swap_crypt_key[0]));
- i++) {
- swap_crypt_key[i] = random();
- }
- aes_encrypt_key((const unsigned char *) swap_crypt_key,
- SWAP_CRYPT_AES_KEY_SIZE,
- &swap_crypt_ctx.encrypt);
- aes_decrypt_key((const unsigned char *) swap_crypt_key,
- SWAP_CRYPT_AES_KEY_SIZE,
- &swap_crypt_ctx.decrypt);
- swap_crypt_ctx_initialized = TRUE;
- }
-
-#if DEBUG
- /*
- * Validate the encryption algorithms.
- */
- if (swap_crypt_ctx_tested == FALSE) {
- /* initialize */
- for (i = 0; i < 4096; i++) {
- swap_crypt_test_page_ref[i] = (char) i;
- }
- /* encrypt */
- aes_encrypt_cbc(swap_crypt_test_page_ref,
- swap_crypt_null_iv,
- PAGE_SIZE / AES_BLOCK_SIZE,
- swap_crypt_test_page_encrypt,
- &swap_crypt_ctx.encrypt);
- /* decrypt */
- aes_decrypt_cbc(swap_crypt_test_page_encrypt,
- swap_crypt_null_iv,
- PAGE_SIZE / AES_BLOCK_SIZE,
- swap_crypt_test_page_decrypt,
- &swap_crypt_ctx.decrypt);
- /* compare result with original */
- for (i = 0; i < 4096; i ++) {
- if (swap_crypt_test_page_decrypt[i] !=
- swap_crypt_test_page_ref[i]) {
- panic("encryption test failed");
- }
- }
-
- /* encrypt again */
- aes_encrypt_cbc(swap_crypt_test_page_decrypt,
- swap_crypt_null_iv,
- PAGE_SIZE / AES_BLOCK_SIZE,
- swap_crypt_test_page_decrypt,
- &swap_crypt_ctx.encrypt);
- /* decrypt in place */
- aes_decrypt_cbc(swap_crypt_test_page_decrypt,
- swap_crypt_null_iv,
- PAGE_SIZE / AES_BLOCK_SIZE,
- swap_crypt_test_page_decrypt,
- &swap_crypt_ctx.decrypt);
- for (i = 0; i < 4096; i ++) {
- if (swap_crypt_test_page_decrypt[i] !=
- swap_crypt_test_page_ref[i]) {
- panic("in place encryption test failed");
- }
- }
-
- swap_crypt_ctx_tested = TRUE;
- }
-#endif /* DEBUG */
-}
-
-/*
- * ENCRYPTED SWAP:
- * vm_page_encrypt:
- * Encrypt the given page, for secure paging.
- * The page might already be mapped at kernel virtual
- * address "kernel_mapping_offset". Otherwise, we need
- * to map it.
- *
- * Context:
- * The page's object is locked, but this lock will be released
- * and re-acquired.
- * The page is busy and not accessible by users (not entered in any pmap).
- */
-void
-vm_page_encrypt(
- vm_page_t page,
- vm_map_offset_t kernel_mapping_offset)
-{
- kern_return_t kr;
- vm_map_size_t kernel_mapping_size;
- boolean_t kernel_mapping_needs_unmap;
- vm_offset_t kernel_vaddr;
- union {
- unsigned char aes_iv[AES_BLOCK_SIZE];
- struct {
- memory_object_t pager_object;
- vm_object_offset_t paging_offset;
- } vm;
- } encrypt_iv;
-
- if (! vm_pages_encrypted) {
- vm_pages_encrypted = TRUE;
- }
-
- assert(page->busy);
-
- if (page->encrypted) {
- /*
- * Already encrypted: no need to do it again.
- */
- vm_page_encrypt_already_encrypted_counter++;
- return;
- }
- assert(page->dirty || page->precious);
-
- ASSERT_PAGE_DECRYPTED(page);
-
- /*
- * Take a paging-in-progress reference to keep the object
- * alive even if we have to unlock it (in vm_paging_map_object()
- * for example)...
- */
- vm_object_paging_begin(page->object);
-
- if (kernel_mapping_offset == 0) {
- /*
- * The page hasn't already been mapped in kernel space
- * by the caller. Map it now, so that we can access
- * its contents and encrypt them.
- */
- kernel_mapping_size = PAGE_SIZE;
- kernel_mapping_needs_unmap = FALSE;
- kr = vm_paging_map_object(page,
- page->object,
- page->offset,
- VM_PROT_READ | VM_PROT_WRITE,
- FALSE,
- &kernel_mapping_size,
- &kernel_mapping_offset,
- &kernel_mapping_needs_unmap);
- if (kr != KERN_SUCCESS) {
- panic("vm_page_encrypt: "
- "could not map page in kernel: 0x%x\n",
- kr);
- }
- } else {
- kernel_mapping_size = 0;
- kernel_mapping_needs_unmap = FALSE;
- }
- kernel_vaddr = CAST_DOWN(vm_offset_t, kernel_mapping_offset);
-
- if (swap_crypt_ctx_initialized == FALSE) {
- swap_crypt_ctx_initialize();
- }
- assert(swap_crypt_ctx_initialized);
-
- /*
- * Prepare an "initial vector" for the encryption.
- * We use the "pager" and the "paging_offset" for that
- * page to obfuscate the encrypted data a bit more and
- * prevent crackers from finding patterns that they could
- * use to break the key.
- */
- bzero(&encrypt_iv.aes_iv[0], sizeof (encrypt_iv.aes_iv));
- encrypt_iv.vm.pager_object = page->object->pager;
- encrypt_iv.vm.paging_offset =
- page->object->paging_offset + page->offset;
-
- /* encrypt the "initial vector" */
- aes_encrypt_cbc((const unsigned char *) &encrypt_iv.aes_iv[0],
- swap_crypt_null_iv,
- 1,
- &encrypt_iv.aes_iv[0],
- &swap_crypt_ctx.encrypt);
-
- /*
- * Encrypt the page.
- */
- aes_encrypt_cbc((const unsigned char *) kernel_vaddr,
- &encrypt_iv.aes_iv[0],
- PAGE_SIZE / AES_BLOCK_SIZE,
- (unsigned char *) kernel_vaddr,
- &swap_crypt_ctx.encrypt);
-
- vm_page_encrypt_counter++;
-
- /*
- * Unmap the page from the kernel's address space,
- * if we had to map it ourselves. Otherwise, let
- * the caller undo the mapping if needed.
- */
- if (kernel_mapping_needs_unmap) {
- vm_paging_unmap_object(page->object,
- kernel_mapping_offset,
- kernel_mapping_offset + kernel_mapping_size);
- }
-
- /*
- * Clear the "reference" and "modified" bits.
- * This should clean up any impact the encryption had
- * on them.
- * The page was kept busy and disconnected from all pmaps,
- * so it can't have been referenced or modified from user
- * space.
- * The software bits will be reset later after the I/O
- * has completed (in upl_commit_range()).
- */
- pmap_clear_refmod(page->phys_page, VM_MEM_REFERENCED | VM_MEM_MODIFIED);
-
- page->encrypted = TRUE;
-
- vm_object_paging_end(page->object);
-}
-
-/*
- * ENCRYPTED SWAP:
- * vm_page_decrypt:
- * Decrypt the given page.
- * The page might already be mapped at kernel virtual
- * address "kernel_mapping_offset". Otherwise, we need
- * to map it.
- *
- * Context:
- * The page's VM object is locked but will be unlocked and relocked.
- * The page is busy and not accessible by users (not entered in any pmap).
- */
-void
-vm_page_decrypt(
- vm_page_t page,
- vm_map_offset_t kernel_mapping_offset)
-{
- kern_return_t kr;
- vm_map_size_t kernel_mapping_size;
- vm_offset_t kernel_vaddr;
- boolean_t kernel_mapping_needs_unmap;
- union {
- unsigned char aes_iv[AES_BLOCK_SIZE];
- struct {
- memory_object_t pager_object;
- vm_object_offset_t paging_offset;
- } vm;
- } decrypt_iv;
- boolean_t was_dirty;
-
- assert(page->busy);
- assert(page->encrypted);
-
- was_dirty = page->dirty;
-
- /*
- * Take a paging-in-progress reference to keep the object
- * alive even if we have to unlock it (in vm_paging_map_object()
- * for example)...
- */
- vm_object_paging_begin(page->object);
-
- if (kernel_mapping_offset == 0) {
- /*
- * The page hasn't already been mapped in kernel space
- * by the caller. Map it now, so that we can access
- * its contents and decrypt them.
- */
- kernel_mapping_size = PAGE_SIZE;
- kernel_mapping_needs_unmap = FALSE;
- kr = vm_paging_map_object(page,
- page->object,
- page->offset,
- VM_PROT_READ | VM_PROT_WRITE,
- FALSE,
- &kernel_mapping_size,
- &kernel_mapping_offset,
- &kernel_mapping_needs_unmap);
- if (kr != KERN_SUCCESS) {
- panic("vm_page_decrypt: "
- "could not map page in kernel: 0x%x\n",
- kr);
- }
- } else {
- kernel_mapping_size = 0;
- kernel_mapping_needs_unmap = FALSE;
- }
- kernel_vaddr = CAST_DOWN(vm_offset_t, kernel_mapping_offset);
-
- assert(swap_crypt_ctx_initialized);
-
- /*
- * Prepare an "initial vector" for the decryption.
- * It has to be the same as the "initial vector" we
- * used to encrypt that page.
- */
- bzero(&decrypt_iv.aes_iv[0], sizeof (decrypt_iv.aes_iv));
- decrypt_iv.vm.pager_object = page->object->pager;
- decrypt_iv.vm.paging_offset =
- page->object->paging_offset + page->offset;
-
- /* encrypt the "initial vector" */
- aes_encrypt_cbc((const unsigned char *) &decrypt_iv.aes_iv[0],
- swap_crypt_null_iv,
- 1,
- &decrypt_iv.aes_iv[0],
- &swap_crypt_ctx.encrypt);
-
- /*
- * Decrypt the page.
- */
- aes_decrypt_cbc((const unsigned char *) kernel_vaddr,
- &decrypt_iv.aes_iv[0],
- PAGE_SIZE / AES_BLOCK_SIZE,
- (unsigned char *) kernel_vaddr,
- &swap_crypt_ctx.decrypt);
- vm_page_decrypt_counter++;
-
- /*
- * Unmap the page from the kernel's address space,
- * if we had to map it ourselves. Otherwise, let
- * the caller undo the mapping if needed.
- */
- if (kernel_mapping_needs_unmap) {
- vm_paging_unmap_object(page->object,
- kernel_vaddr,
- kernel_vaddr + PAGE_SIZE);
- }
-
- if (was_dirty) {
- /*
- * The pager did not specify that the page would be
- * clean when it got paged in, so let's not clean it here
- * either.
- */
- } else {
- /*
- * After decryption, the page is actually still clean.
- * It was encrypted as part of paging, which "cleans"
- * the "dirty" pages.
- * Noone could access it after it was encrypted
- * and the decryption doesn't count.
- */
- page->dirty = FALSE;
- assert (page->cs_validated == FALSE);
- pmap_clear_refmod(page->phys_page, VM_MEM_MODIFIED | VM_MEM_REFERENCED);
- }
- page->encrypted = FALSE;
-
- /*
- * We've just modified the page's contents via the data cache and part
- * of the new contents might still be in the cache and not yet in RAM.
- * Since the page is now available and might get gathered in a UPL to
- * be part of a DMA transfer from a driver that expects the memory to
- * be coherent at this point, we have to flush the data cache.
- */
- pmap_sync_page_attributes_phys(page->phys_page);
- /*
- * Since the page is not mapped yet, some code might assume that it
- * doesn't need to invalidate the instruction cache when writing to
- * that page. That code relies on "pmapped" being FALSE, so that the
- * caches get synchronized when the page is first mapped.
- */
- assert(pmap_verify_free(page->phys_page));
- page->pmapped = FALSE;
- page->wpmapped = FALSE;
-
- vm_object_paging_end(page->object);
-}
-
-#if DEVELOPMENT || DEBUG
-unsigned long upl_encrypt_upls = 0;
-unsigned long upl_encrypt_pages = 0;
-#endif
-
-/*
- * ENCRYPTED SWAP:
- *
- * upl_encrypt:
- * Encrypts all the pages in the UPL, within the specified range.
- *
- */
-void
-upl_encrypt(
- upl_t upl,
- upl_offset_t crypt_offset,
- upl_size_t crypt_size)
-{
- upl_size_t upl_size, subupl_size=crypt_size;
- upl_offset_t offset_in_upl, subupl_offset=crypt_offset;
- vm_object_t upl_object;
- vm_object_offset_t upl_offset;
- vm_page_t page;
- vm_object_t shadow_object;
- vm_object_offset_t shadow_offset;
- vm_object_offset_t paging_offset;
- vm_object_offset_t base_offset;
- int isVectorUPL = 0;
- upl_t vector_upl = NULL;
-
- if((isVectorUPL = vector_upl_is_valid(upl)))
- vector_upl = upl;
-
-process_upl_to_encrypt:
- if(isVectorUPL) {
- crypt_size = subupl_size;
- crypt_offset = subupl_offset;
- upl = vector_upl_subupl_byoffset(vector_upl, &crypt_offset, &crypt_size);
- if(upl == NULL)
- panic("upl_encrypt: Accessing a sub-upl that doesn't exist\n");
- subupl_size -= crypt_size;
- subupl_offset += crypt_size;
- }
-
-#if DEVELOPMENT || DEBUG
- upl_encrypt_upls++;
- upl_encrypt_pages += crypt_size / PAGE_SIZE;
-#endif
- upl_object = upl->map_object;
- upl_offset = upl->offset;
- upl_size = upl->size;
-
- vm_object_lock(upl_object);
-
- /*
- * Find the VM object that contains the actual pages.
- */
- if (upl_object->pageout) {
- shadow_object = upl_object->shadow;
- /*
- * The offset in the shadow object is actually also
- * accounted for in upl->offset. It possibly shouldn't be
- * this way, but for now don't account for it twice.
- */
- shadow_offset = 0;
- assert(upl_object->paging_offset == 0); /* XXX ? */
- vm_object_lock(shadow_object);
- } else {
- shadow_object = upl_object;
- shadow_offset = 0;
- }
-
- paging_offset = shadow_object->paging_offset;
- vm_object_paging_begin(shadow_object);
-
- if (shadow_object != upl_object)
- vm_object_unlock(upl_object);
-
-
- base_offset = shadow_offset;
- base_offset += upl_offset;
- base_offset += crypt_offset;
- base_offset -= paging_offset;
-
- assert(crypt_offset + crypt_size <= upl_size);
-
- for (offset_in_upl = 0;
- offset_in_upl < crypt_size;
- offset_in_upl += PAGE_SIZE) {
- page = vm_page_lookup(shadow_object,
- base_offset + offset_in_upl);
- if (page == VM_PAGE_NULL) {
- panic("upl_encrypt: "
- "no page for (obj=%p,off=0x%llx+0x%x)!\n",
- shadow_object,
- base_offset,
- offset_in_upl);
- }
- /*
- * Disconnect the page from all pmaps, so that nobody can
- * access it while it's encrypted. After that point, all
- * accesses to this page will cause a page fault and block
- * while the page is busy being encrypted. After the
- * encryption completes, any access will cause a
- * page fault and the page gets decrypted at that time.
- */
- pmap_disconnect(page->phys_page);
- vm_page_encrypt(page, 0);
-
- if (vm_object_lock_avoid(shadow_object)) {
- /*
- * Give vm_pageout_scan() a chance to convert more
- * pages from "clean-in-place" to "clean-and-free",
- * if it's interested in the same pages we selected
- * in this cluster.
- */
- vm_object_unlock(shadow_object);
- mutex_pause(2);
- vm_object_lock(shadow_object);
- }
- }
-
- vm_object_paging_end(shadow_object);
- vm_object_unlock(shadow_object);
-
- if(isVectorUPL && subupl_size)
- goto process_upl_to_encrypt;
-}
-
-#else /* CRYPTO */
-void
-upl_encrypt(
- __unused upl_t upl,
- __unused upl_offset_t crypt_offset,
- __unused upl_size_t crypt_size)
-{
-}
-
-void
-vm_page_encrypt(
- __unused vm_page_t page,
- __unused vm_map_offset_t kernel_mapping_offset)
-{
-}
-
-void
-vm_page_decrypt(
- __unused vm_page_t page,
- __unused vm_map_offset_t kernel_mapping_offset)
-{
-}
-
-#endif /* CRYPTO */
/*
- * page->object must be locked
+ * page->vmp_object must be locked
*/
void
vm_pageout_steal_laundry(vm_page_t page, boolean_t queues_locked)
vm_page_lockspin_queues();
}
+ page->vmp_free_when_done = FALSE;
/*
* need to drop the laundry count...
* we may also need to remove it
*/
vm_pageout_throttle_up(page);
- vm_page_steal_pageout_page++;
-
if (!queues_locked) {
vm_page_unlock_queues();
}
upl_t
vector_upl_create(vm_offset_t upl_offset)
{
- int vector_upl_size = sizeof(struct _vector_upl);
- int i=0;
- upl_t upl;
+ int vector_upl_size = sizeof(struct _vector_upl);
+ int i = 0;
+ upl_t upl;
vector_upl_t vector_upl = (vector_upl_t)kalloc(vector_upl_size);
- upl = upl_create(0,UPL_VECTOR,0);
+ upl = upl_create(0, UPL_VECTOR, 0);
upl->vector_upl = vector_upl;
- upl->offset = upl_offset;
+ upl->u_offset = upl_offset;
vector_upl->size = 0;
vector_upl->offset = upl_offset;
- vector_upl->invalid_upls=0;
- vector_upl->num_upls=0;
+ vector_upl->invalid_upls = 0;
+ vector_upl->num_upls = 0;
vector_upl->pagelist = NULL;
-
- for(i=0; i < MAX_VECTOR_UPL_ELEMENTS ; i++) {
+
+ for (i = 0; i < MAX_VECTOR_UPL_ELEMENTS; i++) {
vector_upl->upl_iostates[i].size = 0;
vector_upl->upl_iostates[i].offset = 0;
-
}
return upl;
}
void
vector_upl_deallocate(upl_t upl)
{
- if(upl) {
+ if (upl) {
vector_upl_t vector_upl = upl->vector_upl;
- if(vector_upl) {
- if(vector_upl->invalid_upls != vector_upl->num_upls)
+ if (vector_upl) {
+ if (vector_upl->invalid_upls != vector_upl->num_upls) {
panic("Deallocating non-empty Vectored UPL\n");
- kfree(vector_upl->pagelist,(sizeof(struct upl_page_info)*(vector_upl->size/PAGE_SIZE)));
- vector_upl->invalid_upls=0;
+ }
+ kfree(vector_upl->pagelist, (sizeof(struct upl_page_info) * (vector_upl->size / PAGE_SIZE)));
+ vector_upl->invalid_upls = 0;
vector_upl->num_upls = 0;
vector_upl->pagelist = NULL;
vector_upl->size = 0;
vector_upl->offset = 0;
kfree(vector_upl, sizeof(struct _vector_upl));
vector_upl = (vector_upl_t)0xfeedfeed;
- }
- else
+ } else {
panic("vector_upl_deallocate was passed a non-vectored upl\n");
- }
- else
+ }
+ } else {
panic("vector_upl_deallocate was passed a NULL upl\n");
+ }
}
boolean_t
vector_upl_is_valid(upl_t upl)
{
- if(upl && ((upl->flags & UPL_VECTOR)==UPL_VECTOR)) {
+ if (upl && ((upl->flags & UPL_VECTOR) == UPL_VECTOR)) {
vector_upl_t vector_upl = upl->vector_upl;
- if(vector_upl == NULL || vector_upl == (vector_upl_t)0xfeedfeed || vector_upl == (vector_upl_t)0xfeedbeef)
+ if (vector_upl == NULL || vector_upl == (vector_upl_t)0xfeedfeed || vector_upl == (vector_upl_t)0xfeedbeef) {
return FALSE;
- else
+ } else {
return TRUE;
+ }
}
return FALSE;
}
boolean_t
-vector_upl_set_subupl(upl_t upl,upl_t subupl, uint32_t io_size)
+vector_upl_set_subupl(upl_t upl, upl_t subupl, uint32_t io_size)
{
- if(vector_upl_is_valid(upl)) {
+ if (vector_upl_is_valid(upl)) {
vector_upl_t vector_upl = upl->vector_upl;
-
- if(vector_upl) {
- if(subupl) {
- if(io_size) {
- if(io_size < PAGE_SIZE)
+
+ if (vector_upl) {
+ if (subupl) {
+ if (io_size) {
+ if (io_size < PAGE_SIZE) {
io_size = PAGE_SIZE;
+ }
subupl->vector_upl = (void*)vector_upl;
vector_upl->upl_elems[vector_upl->num_upls++] = subupl;
vector_upl->size += io_size;
- upl->size += io_size;
- }
- else {
- uint32_t i=0,invalid_upls=0;
- for(i = 0; i < vector_upl->num_upls; i++) {
- if(vector_upl->upl_elems[i] == subupl)
+ upl->u_size += io_size;
+ } else {
+ uint32_t i = 0, invalid_upls = 0;
+ for (i = 0; i < vector_upl->num_upls; i++) {
+ if (vector_upl->upl_elems[i] == subupl) {
break;
+ }
}
- if(i == vector_upl->num_upls)
+ if (i == vector_upl->num_upls) {
panic("Trying to remove sub-upl when none exists");
-
+ }
+
vector_upl->upl_elems[i] = NULL;
- invalid_upls = hw_atomic_add(&(vector_upl)->invalid_upls, 1);
- if(invalid_upls == vector_upl->num_upls)
+ invalid_upls = os_atomic_inc(&(vector_upl)->invalid_upls,
+ relaxed);
+ if (invalid_upls == vector_upl->num_upls) {
return TRUE;
- else
+ } else {
return FALSE;
+ }
}
- }
- else
+ } else {
panic("vector_upl_set_subupl was passed a NULL upl element\n");
- }
- else
+ }
+ } else {
panic("vector_upl_set_subupl was passed a non-vectored upl\n");
- }
- else
+ }
+ } else {
panic("vector_upl_set_subupl was passed a NULL upl\n");
+ }
return FALSE;
-}
+}
void
vector_upl_set_pagelist(upl_t upl)
{
- if(vector_upl_is_valid(upl)) {
- uint32_t i=0;
+ if (vector_upl_is_valid(upl)) {
+ uint32_t i = 0;
vector_upl_t vector_upl = upl->vector_upl;
- if(vector_upl) {
- vm_offset_t pagelist_size=0, cur_upl_pagelist_size=0;
+ if (vector_upl) {
+ vm_offset_t pagelist_size = 0, cur_upl_pagelist_size = 0;
- vector_upl->pagelist = (upl_page_info_array_t)kalloc(sizeof(struct upl_page_info)*(vector_upl->size/PAGE_SIZE));
-
- for(i=0; i < vector_upl->num_upls; i++) {
- cur_upl_pagelist_size = sizeof(struct upl_page_info) * vector_upl->upl_elems[i]->size/PAGE_SIZE;
+ vector_upl->pagelist = (upl_page_info_array_t)kalloc(sizeof(struct upl_page_info) * (vector_upl->size / PAGE_SIZE));
+
+ for (i = 0; i < vector_upl->num_upls; i++) {
+ cur_upl_pagelist_size = sizeof(struct upl_page_info) * upl_adjusted_size(vector_upl->upl_elems[i], PAGE_MASK) / PAGE_SIZE;
bcopy(UPL_GET_INTERNAL_PAGE_LIST_SIMPLE(vector_upl->upl_elems[i]), (char*)vector_upl->pagelist + pagelist_size, cur_upl_pagelist_size);
pagelist_size += cur_upl_pagelist_size;
- if(vector_upl->upl_elems[i]->highest_page > upl->highest_page)
+ if (vector_upl->upl_elems[i]->highest_page > upl->highest_page) {
upl->highest_page = vector_upl->upl_elems[i]->highest_page;
+ }
}
- assert( pagelist_size == (sizeof(struct upl_page_info)*(vector_upl->size/PAGE_SIZE)) );
- }
- else
+ assert( pagelist_size == (sizeof(struct upl_page_info) * (vector_upl->size / PAGE_SIZE)));
+ } else {
panic("vector_upl_set_pagelist was passed a non-vectored upl\n");
- }
- else
+ }
+ } else {
panic("vector_upl_set_pagelist was passed a NULL upl\n");
-
+ }
}
upl_t
vector_upl_subupl_byindex(upl_t upl, uint32_t index)
{
- if(vector_upl_is_valid(upl)) {
+ if (vector_upl_is_valid(upl)) {
vector_upl_t vector_upl = upl->vector_upl;
- if(vector_upl) {
- if(index < vector_upl->num_upls)
+ if (vector_upl) {
+ if (index < vector_upl->num_upls) {
return vector_upl->upl_elems[index];
- }
- else
+ }
+ } else {
panic("vector_upl_subupl_byindex was passed a non-vectored upl\n");
+ }
}
return NULL;
}
upl_t
vector_upl_subupl_byoffset(upl_t upl, upl_offset_t *upl_offset, upl_size_t *upl_size)
{
- if(vector_upl_is_valid(upl)) {
- uint32_t i=0;
+ if (vector_upl_is_valid(upl)) {
+ uint32_t i = 0;
vector_upl_t vector_upl = upl->vector_upl;
- if(vector_upl) {
+ if (vector_upl) {
upl_t subupl = NULL;
vector_upl_iostates_t subupl_state;
- for(i=0; i < vector_upl->num_upls; i++) {
+ for (i = 0; i < vector_upl->num_upls; i++) {
subupl = vector_upl->upl_elems[i];
subupl_state = vector_upl->upl_iostates[i];
- if( *upl_offset <= (subupl_state.offset + subupl_state.size - 1)) {
+ if (*upl_offset <= (subupl_state.offset + subupl_state.size - 1)) {
/* We could have been passed an offset/size pair that belongs
* to an UPL element that has already been committed/aborted.
* If so, return NULL.
*/
- if(subupl == NULL)
+ if (subupl == NULL) {
return NULL;
- if((subupl_state.offset + subupl_state.size) < (*upl_offset + *upl_size)) {
+ }
+ if ((subupl_state.offset + subupl_state.size) < (*upl_offset + *upl_size)) {
*upl_size = (subupl_state.offset + subupl_state.size) - *upl_offset;
- if(*upl_size > subupl_state.size)
+ if (*upl_size > subupl_state.size) {
*upl_size = subupl_state.size;
+ }
}
- if(*upl_offset >= subupl_state.offset)
+ if (*upl_offset >= subupl_state.offset) {
*upl_offset -= subupl_state.offset;
- else if(i)
+ } else if (i) {
panic("Vector UPL offset miscalculation\n");
+ }
return subupl;
- }
+ }
}
- }
- else
+ } else {
panic("vector_upl_subupl_byoffset was passed a non-vectored UPL\n");
+ }
}
return NULL;
}
{
*v_upl_submap = NULL;
- if(vector_upl_is_valid(upl)) {
+ if (vector_upl_is_valid(upl)) {
vector_upl_t vector_upl = upl->vector_upl;
- if(vector_upl) {
+ if (vector_upl) {
*v_upl_submap = vector_upl->submap;
*submap_dst_addr = vector_upl->submap_dst_addr;
- }
- else
+ } else {
panic("vector_upl_get_submap was passed a non-vectored UPL\n");
- }
- else
+ }
+ } else {
panic("vector_upl_get_submap was passed a null UPL\n");
+ }
}
void
vector_upl_set_submap(upl_t upl, vm_map_t submap, vm_offset_t submap_dst_addr)
{
- if(vector_upl_is_valid(upl)) {
+ if (vector_upl_is_valid(upl)) {
vector_upl_t vector_upl = upl->vector_upl;
- if(vector_upl) {
+ if (vector_upl) {
vector_upl->submap = submap;
vector_upl->submap_dst_addr = submap_dst_addr;
- }
- else
+ } else {
panic("vector_upl_get_submap was passed a non-vectored UPL\n");
- }
- else
+ }
+ } else {
panic("vector_upl_get_submap was passed a NULL UPL\n");
+ }
}
void
vector_upl_set_iostate(upl_t upl, upl_t subupl, upl_offset_t offset, upl_size_t size)
{
- if(vector_upl_is_valid(upl)) {
+ if (vector_upl_is_valid(upl)) {
uint32_t i = 0;
vector_upl_t vector_upl = upl->vector_upl;
- if(vector_upl) {
- for(i = 0; i < vector_upl->num_upls; i++) {
- if(vector_upl->upl_elems[i] == subupl)
+ if (vector_upl) {
+ for (i = 0; i < vector_upl->num_upls; i++) {
+ if (vector_upl->upl_elems[i] == subupl) {
break;
+ }
}
-
- if(i == vector_upl->num_upls)
+
+ if (i == vector_upl->num_upls) {
panic("setting sub-upl iostate when none exists");
+ }
vector_upl->upl_iostates[i].offset = offset;
- if(size < PAGE_SIZE)
+ if (size < PAGE_SIZE) {
size = PAGE_SIZE;
+ }
vector_upl->upl_iostates[i].size = size;
- }
- else
+ } else {
panic("vector_upl_set_iostate was passed a non-vectored UPL\n");
- }
- else
+ }
+ } else {
panic("vector_upl_set_iostate was passed a NULL UPL\n");
+ }
}
void
vector_upl_get_iostate(upl_t upl, upl_t subupl, upl_offset_t *offset, upl_size_t *size)
{
- if(vector_upl_is_valid(upl)) {
+ if (vector_upl_is_valid(upl)) {
uint32_t i = 0;
vector_upl_t vector_upl = upl->vector_upl;
- if(vector_upl) {
- for(i = 0; i < vector_upl->num_upls; i++) {
- if(vector_upl->upl_elems[i] == subupl)
+ if (vector_upl) {
+ for (i = 0; i < vector_upl->num_upls; i++) {
+ if (vector_upl->upl_elems[i] == subupl) {
break;
+ }
}
-
- if(i == vector_upl->num_upls)
+
+ if (i == vector_upl->num_upls) {
panic("getting sub-upl iostate when none exists");
+ }
*offset = vector_upl->upl_iostates[i].offset;
*size = vector_upl->upl_iostates[i].size;
- }
- else
+ } else {
panic("vector_upl_get_iostate was passed a non-vectored UPL\n");
- }
- else
+ }
+ } else {
panic("vector_upl_get_iostate was passed a NULL UPL\n");
+ }
}
void
vector_upl_get_iostate_byindex(upl_t upl, uint32_t index, upl_offset_t *offset, upl_size_t *size)
{
- if(vector_upl_is_valid(upl)) {
+ if (vector_upl_is_valid(upl)) {
vector_upl_t vector_upl = upl->vector_upl;
- if(vector_upl) {
- if(index < vector_upl->num_upls) {
+ if (vector_upl) {
+ if (index < vector_upl->num_upls) {
*offset = vector_upl->upl_iostates[index].offset;
*size = vector_upl->upl_iostates[index].size;
- }
- else
+ } else {
*offset = *size = 0;
- }
- else
+ }
+ } else {
panic("vector_upl_get_iostate_byindex was passed a non-vectored UPL\n");
- }
- else
+ }
+ } else {
panic("vector_upl_get_iostate_byindex was passed a NULL UPL\n");
+ }
}
upl_page_info_t *
void
upl_clear_dirty(
- upl_t upl,
- boolean_t value)
+ upl_t upl,
+ boolean_t value)
{
if (value) {
upl->flags |= UPL_CLEAR_DIRTY;
void
upl_set_referenced(
- upl_t upl,
- boolean_t value)
+ upl_t upl,
+ boolean_t value)
{
upl_lock(upl);
if (value) {
upl_unlock(upl);
}
-boolean_t
-vm_page_is_slideable(vm_page_t m)
-{
- boolean_t result = FALSE;
- vm_shared_region_slide_info_t si;
-
- vm_object_lock_assert_held(m->object);
-
- /* make sure our page belongs to the one object allowed to do this */
- if (!m->object->object_slid) {
- goto done;
- }
-
- si = m->object->vo_slide_info;
- if (si == NULL) {
- goto done;
- }
-
- if(!m->slid && (si->start <= m->offset && si->end > m->offset)) {
- result = TRUE;
- }
-
-done:
- return result;
-}
-
-int vm_page_slide_counter = 0;
-int vm_page_slide_errors = 0;
-kern_return_t
-vm_page_slide(
- vm_page_t page,
- vm_map_offset_t kernel_mapping_offset)
+#if CONFIG_IOSCHED
+void
+upl_set_blkno(
+ upl_t upl,
+ vm_offset_t upl_offset,
+ int io_size,
+ int64_t blkno)
{
- kern_return_t kr;
- vm_map_size_t kernel_mapping_size;
- boolean_t kernel_mapping_needs_unmap;
- vm_offset_t kernel_vaddr;
- uint32_t pageIndex = 0;
-
- assert(!page->slid);
- assert(page->object->object_slid);
- vm_object_lock_assert_exclusive(page->object);
-
- if (page->error)
- return KERN_FAILURE;
-
- /*
- * Take a paging-in-progress reference to keep the object
- * alive even if we have to unlock it (in vm_paging_map_object()
- * for example)...
- */
- vm_object_paging_begin(page->object);
-
- if (kernel_mapping_offset == 0) {
- /*
- * The page hasn't already been mapped in kernel space
- * by the caller. Map it now, so that we can access
- * its contents and decrypt them.
- */
- kernel_mapping_size = PAGE_SIZE;
- kernel_mapping_needs_unmap = FALSE;
- kr = vm_paging_map_object(page,
- page->object,
- page->offset,
- VM_PROT_READ | VM_PROT_WRITE,
- FALSE,
- &kernel_mapping_size,
- &kernel_mapping_offset,
- &kernel_mapping_needs_unmap);
- if (kr != KERN_SUCCESS) {
- panic("vm_page_slide: "
- "could not map page in kernel: 0x%x\n",
- kr);
- }
- } else {
- kernel_mapping_size = 0;
- kernel_mapping_needs_unmap = FALSE;
+ int i, j;
+ if ((upl->flags & UPL_EXPEDITE_SUPPORTED) == 0) {
+ return;
}
- kernel_vaddr = CAST_DOWN(vm_offset_t, kernel_mapping_offset);
-
- /*
- * Slide the pointers on the page.
- */
-
- /*assert that slide_file_info.start/end are page-aligned?*/
- assert(!page->slid);
- assert(page->object->object_slid);
-
- pageIndex = (uint32_t)((page->offset - page->object->vo_slide_info->start)/PAGE_SIZE);
- kr = vm_shared_region_slide_page(page->object->vo_slide_info, kernel_vaddr, pageIndex);
- vm_page_slide_counter++;
-
- /*
- * Unmap the page from the kernel's address space,
- */
- if (kernel_mapping_needs_unmap) {
- vm_paging_unmap_object(page->object,
- kernel_vaddr,
- kernel_vaddr + PAGE_SIZE);
- }
-
- page->dirty = FALSE;
- pmap_clear_refmod(page->phys_page, VM_MEM_MODIFIED | VM_MEM_REFERENCED);
-
- if (kr != KERN_SUCCESS || cs_debug > 1) {
- printf("vm_page_slide(%p): "
- "obj %p off 0x%llx mobj %p moff 0x%llx\n",
- page,
- page->object, page->offset,
- page->object->pager,
- page->offset + page->object->paging_offset);
- }
-
- if (kr == KERN_SUCCESS) {
- page->slid = TRUE;
- } else {
- page->error = TRUE;
- vm_page_slide_errors++;
+ assert(upl->upl_reprio_info != 0);
+ for (i = (int)(upl_offset / PAGE_SIZE), j = 0; j < io_size; i++, j += PAGE_SIZE) {
+ UPL_SET_REPRIO_INFO(upl, i, blkno, io_size);
}
-
- vm_object_paging_end(page->object);
-
- return kr;
}
+#endif
-void inline memoryshot(unsigned int event, unsigned int control)
+void inline
+memoryshot(unsigned int event, unsigned int control)
{
if (vm_debug_events) {
KERNEL_DEBUG_CONSTANT1((MACHDBG_CODE(DBG_MACH_VM_PRESSURE, event)) | control,
- vm_page_active_count, vm_page_inactive_count,
- vm_page_free_count, vm_page_speculative_count,
- vm_page_throttled_count);
+ vm_page_active_count, vm_page_inactive_count,
+ vm_page_free_count, vm_page_speculative_count,
+ vm_page_throttled_count);
} else {
(void) event;
(void) control;
}
-
}
#ifdef MACH_BSD
-boolean_t upl_device_page(upl_page_info_t *upl)
+boolean_t
+upl_device_page(upl_page_info_t *upl)
+{
+ return UPL_DEVICE_PAGE(upl);
+}
+boolean_t
+upl_page_present(upl_page_info_t *upl, int index)
{
- return(UPL_DEVICE_PAGE(upl));
+ return UPL_PAGE_PRESENT(upl, index);
}
-boolean_t upl_page_present(upl_page_info_t *upl, int index)
+boolean_t
+upl_speculative_page(upl_page_info_t *upl, int index)
{
- return(UPL_PAGE_PRESENT(upl, index));
+ return UPL_SPECULATIVE_PAGE(upl, index);
}
-boolean_t upl_speculative_page(upl_page_info_t *upl, int index)
+boolean_t
+upl_dirty_page(upl_page_info_t *upl, int index)
{
- return(UPL_SPECULATIVE_PAGE(upl, index));
+ return UPL_DIRTY_PAGE(upl, index);
}
-boolean_t upl_dirty_page(upl_page_info_t *upl, int index)
+boolean_t
+upl_valid_page(upl_page_info_t *upl, int index)
{
- return(UPL_DIRTY_PAGE(upl, index));
+ return UPL_VALID_PAGE(upl, index);
}
-boolean_t upl_valid_page(upl_page_info_t *upl, int index)
+ppnum_t
+upl_phys_page(upl_page_info_t *upl, int index)
{
- return(UPL_VALID_PAGE(upl, index));
+ return UPL_PHYS_PAGE(upl, index);
}
-ppnum_t upl_phys_page(upl_page_info_t *upl, int index)
+
+void
+upl_page_set_mark(upl_page_info_t *upl, int index, boolean_t v)
{
- return(UPL_PHYS_PAGE(upl, index));
+ upl[index].mark = v;
}
+boolean_t
+upl_page_get_mark(upl_page_info_t *upl, int index)
+{
+ return upl[index].mark;
+}
void
vm_countdirtypages(void)
int precpages;
- dpages=0;
- pgopages=0;
- precpages=0;
+ dpages = 0;
+ pgopages = 0;
+ precpages = 0;
vm_page_lock_queues();
- m = (vm_page_t) queue_first(&vm_page_queue_inactive);
+ m = (vm_page_t) vm_page_queue_first(&vm_page_queue_inactive);
do {
- if (m ==(vm_page_t )0) break;
-
- if(m->dirty) dpages++;
- if(m->pageout) pgopages++;
- if(m->precious) precpages++;
+ if (m == (vm_page_t)0) {
+ break;
+ }
- assert(m->object != kernel_object);
- m = (vm_page_t) queue_next(&m->pageq);
- if (m ==(vm_page_t )0) break;
+ if (m->vmp_dirty) {
+ dpages++;
+ }
+ if (m->vmp_free_when_done) {
+ pgopages++;
+ }
+ if (m->vmp_precious) {
+ precpages++;
+ }
- } while (!queue_end(&vm_page_queue_inactive,(queue_entry_t) m));
+ assert(VM_PAGE_OBJECT(m) != kernel_object);
+ m = (vm_page_t) vm_page_queue_next(&m->vmp_pageq);
+ if (m == (vm_page_t)0) {
+ break;
+ }
+ } while (!vm_page_queue_end(&vm_page_queue_inactive, (vm_page_queue_entry_t) m));
vm_page_unlock_queues();
vm_page_lock_queues();
- m = (vm_page_t) queue_first(&vm_page_queue_throttled);
+ m = (vm_page_t) vm_page_queue_first(&vm_page_queue_throttled);
do {
- if (m ==(vm_page_t )0) break;
+ if (m == (vm_page_t)0) {
+ break;
+ }
dpages++;
- assert(m->dirty);
- assert(!m->pageout);
- assert(m->object != kernel_object);
- m = (vm_page_t) queue_next(&m->pageq);
- if (m ==(vm_page_t )0) break;
-
- } while (!queue_end(&vm_page_queue_throttled,(queue_entry_t) m));
+ assert(m->vmp_dirty);
+ assert(!m->vmp_free_when_done);
+ assert(VM_PAGE_OBJECT(m) != kernel_object);
+ m = (vm_page_t) vm_page_queue_next(&m->vmp_pageq);
+ if (m == (vm_page_t)0) {
+ break;
+ }
+ } while (!vm_page_queue_end(&vm_page_queue_throttled, (vm_page_queue_entry_t) m));
vm_page_unlock_queues();
vm_page_lock_queues();
- m = (vm_page_t) queue_first(&vm_page_queue_anonymous);
+ m = (vm_page_t) vm_page_queue_first(&vm_page_queue_anonymous);
do {
- if (m ==(vm_page_t )0) break;
-
- if(m->dirty) dpages++;
- if(m->pageout) pgopages++;
- if(m->precious) precpages++;
+ if (m == (vm_page_t)0) {
+ break;
+ }
- assert(m->object != kernel_object);
- m = (vm_page_t) queue_next(&m->pageq);
- if (m ==(vm_page_t )0) break;
+ if (m->vmp_dirty) {
+ dpages++;
+ }
+ if (m->vmp_free_when_done) {
+ pgopages++;
+ }
+ if (m->vmp_precious) {
+ precpages++;
+ }
- } while (!queue_end(&vm_page_queue_anonymous,(queue_entry_t) m));
+ assert(VM_PAGE_OBJECT(m) != kernel_object);
+ m = (vm_page_t) vm_page_queue_next(&m->vmp_pageq);
+ if (m == (vm_page_t)0) {
+ break;
+ }
+ } while (!vm_page_queue_end(&vm_page_queue_anonymous, (vm_page_queue_entry_t) m));
vm_page_unlock_queues();
printf("IN Q: %d : %d : %d\n", dpages, pgopages, precpages);
- dpages=0;
- pgopages=0;
- precpages=0;
+ dpages = 0;
+ pgopages = 0;
+ precpages = 0;
vm_page_lock_queues();
- m = (vm_page_t) queue_first(&vm_page_queue_active);
+ m = (vm_page_t) vm_page_queue_first(&vm_page_queue_active);
do {
- if(m == (vm_page_t )0) break;
- if(m->dirty) dpages++;
- if(m->pageout) pgopages++;
- if(m->precious) precpages++;
-
- assert(m->object != kernel_object);
- m = (vm_page_t) queue_next(&m->pageq);
- if(m == (vm_page_t )0) break;
+ if (m == (vm_page_t)0) {
+ break;
+ }
+ if (m->vmp_dirty) {
+ dpages++;
+ }
+ if (m->vmp_free_when_done) {
+ pgopages++;
+ }
+ if (m->vmp_precious) {
+ precpages++;
+ }
- } while (!queue_end(&vm_page_queue_active,(queue_entry_t) m));
+ assert(VM_PAGE_OBJECT(m) != kernel_object);
+ m = (vm_page_t) vm_page_queue_next(&m->vmp_pageq);
+ if (m == (vm_page_t)0) {
+ break;
+ }
+ } while (!vm_page_queue_end(&vm_page_queue_active, (vm_page_queue_entry_t) m));
vm_page_unlock_queues();
printf("AC Q: %d : %d : %d\n", dpages, pgopages, precpages);
-
}
#endif /* MACH_BSD */
-ppnum_t upl_get_highest_page(
- upl_t upl)
+
+#if CONFIG_IOSCHED
+int
+upl_get_cached_tier(upl_t upl)
+{
+ assert(upl);
+ if (upl->flags & UPL_TRACKED_BY_OBJECT) {
+ return upl->upl_priority;
+ }
+ return -1;
+}
+#endif /* CONFIG_IOSCHED */
+
+
+void
+upl_callout_iodone(upl_t upl)
+{
+ struct upl_io_completion *upl_ctx = upl->upl_iodone;
+
+ if (upl_ctx) {
+ void (*iodone_func)(void *, int) = upl_ctx->io_done;
+
+ assert(upl_ctx->io_done);
+
+ (*iodone_func)(upl_ctx->io_context, upl_ctx->io_error);
+ }
+}
+
+void
+upl_set_iodone(upl_t upl, void *upl_iodone)
+{
+ upl->upl_iodone = (struct upl_io_completion *)upl_iodone;
+}
+
+void
+upl_set_iodone_error(upl_t upl, int error)
+{
+ struct upl_io_completion *upl_ctx = upl->upl_iodone;
+
+ if (upl_ctx) {
+ upl_ctx->io_error = error;
+ }
+}
+
+
+ppnum_t
+upl_get_highest_page(
+ upl_t upl)
+{
+ return upl->highest_page;
+}
+
+upl_size_t
+upl_get_size(
+ upl_t upl)
{
- return upl->highest_page;
+ return upl_adjusted_size(upl, PAGE_MASK);
}
-upl_size_t upl_get_size(
- upl_t upl)
+upl_size_t
+upl_adjusted_size(
+ upl_t upl,
+ vm_map_offset_t pgmask)
{
- return upl->size;
+ vm_object_offset_t start_offset, end_offset;
+
+ start_offset = trunc_page_mask_64(upl->u_offset, pgmask);
+ end_offset = round_page_mask_64(upl->u_offset + upl->u_size, pgmask);
+
+ return (upl_size_t)(end_offset - start_offset);
+}
+
+vm_object_offset_t
+upl_adjusted_offset(
+ upl_t upl,
+ vm_map_offset_t pgmask)
+{
+ return trunc_page_mask_64(upl->u_offset, pgmask);
+}
+
+vm_object_offset_t
+upl_get_data_offset(
+ upl_t upl)
+{
+ return upl->u_offset - upl_adjusted_offset(upl, PAGE_MASK);
+}
+
+upl_t
+upl_associated_upl(upl_t upl)
+{
+ return upl->associated_upl;
+}
+
+void
+upl_set_associated_upl(upl_t upl, upl_t associated_upl)
+{
+ upl->associated_upl = associated_upl;
+}
+
+struct vnode *
+upl_lookup_vnode(upl_t upl)
+{
+ if (!upl->map_object->internal) {
+ return vnode_pager_lookup_vnode(upl->map_object->pager);
+ } else {
+ return NULL;
+ }
}
#if UPL_DEBUG
-kern_return_t upl_ubc_alias_set(upl_t upl, uintptr_t alias1, uintptr_t alias2)
+kern_return_t
+upl_ubc_alias_set(upl_t upl, uintptr_t alias1, uintptr_t alias2)
{
upl->ubc_alias1 = alias1;
upl->ubc_alias2 = alias2;
return KERN_SUCCESS;
}
-int upl_ubc_alias_get(upl_t upl, uintptr_t * al, uintptr_t * al2)
+int
+upl_ubc_alias_get(upl_t upl, uintptr_t * al, uintptr_t * al2)
{
- if(al)
+ if (al) {
*al = upl->ubc_alias1;
- if(al2)
+ }
+ if (al2) {
*al2 = upl->ubc_alias2;
+ }
return KERN_SUCCESS;
}
#endif /* UPL_DEBUG */
+
+#if VM_PRESSURE_EVENTS
+/*
+ * Upward trajectory.
+ */
+extern boolean_t vm_compressor_low_on_space(void);
+
+boolean_t
+VM_PRESSURE_NORMAL_TO_WARNING(void)
+{
+ if (!VM_CONFIG_COMPRESSOR_IS_ACTIVE) {
+ /* Available pages below our threshold */
+ if (memorystatus_available_pages < memorystatus_available_pages_pressure) {
+ /* No frozen processes to kill */
+ if (memorystatus_frozen_count == 0) {
+ /* Not enough suspended processes available. */
+ if (memorystatus_suspended_count < MEMORYSTATUS_SUSPENDED_THRESHOLD) {
+ return TRUE;
+ }
+ }
+ }
+ return FALSE;
+ } else {
+ return (AVAILABLE_NON_COMPRESSED_MEMORY < VM_PAGE_COMPRESSOR_COMPACT_THRESHOLD) ? 1 : 0;
+ }
+}
+
+boolean_t
+VM_PRESSURE_WARNING_TO_CRITICAL(void)
+{
+ if (!VM_CONFIG_COMPRESSOR_IS_ACTIVE) {
+ /* Available pages below our threshold */
+ if (memorystatus_available_pages < memorystatus_available_pages_critical) {
+ return TRUE;
+ }
+ return FALSE;
+ } else {
+ return vm_compressor_low_on_space() || (AVAILABLE_NON_COMPRESSED_MEMORY < ((12 * VM_PAGE_COMPRESSOR_SWAP_UNTHROTTLE_THRESHOLD) / 10)) ? 1 : 0;
+ }
+}
+
+/*
+ * Downward trajectory.
+ */
+boolean_t
+VM_PRESSURE_WARNING_TO_NORMAL(void)
+{
+ if (!VM_CONFIG_COMPRESSOR_IS_ACTIVE) {
+ /* Available pages above our threshold */
+ unsigned int target_threshold = (unsigned int) (memorystatus_available_pages_pressure + ((15 * memorystatus_available_pages_pressure) / 100));
+ if (memorystatus_available_pages > target_threshold) {
+ return TRUE;
+ }
+ return FALSE;
+ } else {
+ return (AVAILABLE_NON_COMPRESSED_MEMORY > ((12 * VM_PAGE_COMPRESSOR_COMPACT_THRESHOLD) / 10)) ? 1 : 0;
+ }
+}
+
+boolean_t
+VM_PRESSURE_CRITICAL_TO_WARNING(void)
+{
+ if (!VM_CONFIG_COMPRESSOR_IS_ACTIVE) {
+ /* Available pages above our threshold */
+ unsigned int target_threshold = (unsigned int)(memorystatus_available_pages_critical + ((15 * memorystatus_available_pages_critical) / 100));
+ if (memorystatus_available_pages > target_threshold) {
+ return TRUE;
+ }
+ return FALSE;
+ } else {
+ return (AVAILABLE_NON_COMPRESSED_MEMORY > ((14 * VM_PAGE_COMPRESSOR_SWAP_UNTHROTTLE_THRESHOLD) / 10)) ? 1 : 0;
+ }
+}
+#endif /* VM_PRESSURE_EVENTS */
projects / apple / xnu.git / blobdiff