/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * 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
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * 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.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * 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_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* @OSF_COPYRIGHT@
#ifndef _VM_VM_PAGE_H_
#define _VM_VM_PAGE_H_
+#include <debug.h>
+#include <vm/vm_options.h>
#include <mach/boolean.h>
#include <mach/vm_prot.h>
#include <mach/vm_param.h>
+
+
+#if defined(__LP64__)
+
+/*
+ * in order to make the size of a vm_page_t 64 bytes (cache line size for both arm64 and x86_64)
+ * we'll keep the next_m pointer packed... as long as the kernel virtual space where we allocate
+ * vm_page_t's from doesn't span more then 256 Gbytes, we're safe. There are live tests in the
+ * vm_page_t array allocation and the zone init code to determine if we can safely pack and unpack
+ * pointers from the 2 ends of these spaces
+ */
+typedef uint32_t vm_page_packed_t;
+
+struct vm_page_packed_queue_entry {
+ vm_page_packed_t next; /* next element */
+ vm_page_packed_t prev; /* previous element */
+};
+
+typedef struct vm_page_packed_queue_entry *vm_page_queue_t;
+typedef struct vm_page_packed_queue_entry vm_page_queue_head_t;
+typedef struct vm_page_packed_queue_entry vm_page_queue_chain_t;
+typedef struct vm_page_packed_queue_entry *vm_page_queue_entry_t;
+
+typedef vm_page_packed_t vm_page_object_t;
+
+#else
+
+/*
+ * we can't do the packing trick on 32 bit architectures, so
+ * just turn the macros into noops.
+ */
+typedef struct vm_page *vm_page_packed_t;
+
+#define vm_page_queue_t queue_t
+#define vm_page_queue_head_t queue_head_t
+#define vm_page_queue_chain_t queue_chain_t
+#define vm_page_queue_entry_t queue_entry_t
+
+#define vm_page_object_t vm_object_t
+#endif
+
+
#include <vm/vm_object.h>
#include <kern/queue.h>
-#include <kern/lock.h>
+#include <kern/locks.h>
#include <kern/macro_help.h>
+#include <libkern/OSAtomic.h>
-/*
- * Each page entered on the inactive queue obtains a ticket from a
- * particular ticket roll. Pages granted tickets from a particular
- * roll generally flow through the queue as a group. In this way when a
- * page with a ticket from a particular roll is pulled from the top of the
- * queue it is extremely likely that the pages near the top will have tickets
- * from the same or adjacent rolls. In this way the proximity to the top
- * of the queue can be loosely ascertained by determining the identity of
- * the roll the pages ticket came from.
- */
-extern int vm_page_ticket_roll;
-extern int vm_page_ticket;
-
-#define VM_PAGE_TICKETS_IN_ROLL 512
-#define VM_PAGE_TICKET_ROLL_IDS 16
+#define VM_PAGE_COMPRESSOR_COUNT (compressor_object->resident_page_count)
/*
* Management of resident (logical) pages.
* change that field; holding either lock is sufficient to read.]
*/
-struct vm_page {
- queue_chain_t pageq; /* queue info for FIFO
- * queue or free list (P) */
- queue_chain_t listq; /* all pages in same object (O) */
- struct vm_page *next; /* VP bucket link (O) */
+#define VM_PAGE_NULL ((vm_page_t) 0)
+
+extern char vm_page_inactive_states[];
+extern char vm_page_pageable_states[];
+extern char vm_page_non_speculative_pageable_states[];
+extern char vm_page_active_or_inactive_states[];
+
+
+#define VM_PAGE_INACTIVE(m) (vm_page_inactive_states[m->vm_page_q_state])
+#define VM_PAGE_PAGEABLE(m) (vm_page_pageable_states[m->vm_page_q_state])
+#define VM_PAGE_NON_SPECULATIVE_PAGEABLE(m) (vm_page_non_speculative_pageable_states[m->vm_page_q_state])
+#define VM_PAGE_ACTIVE_OR_INACTIVE(m) (vm_page_active_or_inactive_states[m->vm_page_q_state])
+
+
+#define VM_PAGE_NOT_ON_Q 0 /* page is not present on any queue, nor is it wired... mainly a transient state */
+#define VM_PAGE_IS_WIRED 1 /* page is currently wired */
+#define VM_PAGE_USED_BY_COMPRESSOR 2 /* page is in use by the compressor to hold compressed data */
+#define VM_PAGE_ON_FREE_Q 3 /* page is on the main free queue */
+#define VM_PAGE_ON_FREE_LOCAL_Q 4 /* page is on one of the per-CPU free queues */
+#define VM_PAGE_ON_FREE_LOPAGE_Q 5 /* page is on the lopage pool free list */
+#define VM_PAGE_ON_THROTTLED_Q 6 /* page is on the throttled queue... we stash anonymous pages here when not paging */
+#define VM_PAGE_ON_PAGEOUT_Q 7 /* page is on one of the pageout queues (internal/external) awaiting processing */
+#define VM_PAGE_ON_SPECULATIVE_Q 8 /* page is on one of the speculative queues */
+#define VM_PAGE_ON_ACTIVE_LOCAL_Q 9 /* page has recently been created and is being held in one of the per-CPU local queues */
+#define VM_PAGE_ON_ACTIVE_Q 10 /* page is in global active queue */
+#define VM_PAGE_ON_INACTIVE_INTERNAL_Q 11 /* page is on the inactive internal queue a.k.a. anonymous queue */
+#define VM_PAGE_ON_INACTIVE_EXTERNAL_Q 12 /* page in on the inactive external queue a.k.a. file backed queue */
+#define VM_PAGE_ON_INACTIVE_CLEANED_Q 13 /* page has been cleaned to a backing file and is ready to be stolen */
+#define VM_PAGE_ON_SECLUDED_Q 14 /* page is on secluded queue */
+#define VM_PAGE_Q_STATE_LAST_VALID_VALUE 14 /* we currently use 4 bits for the state... don't let this go beyond 15 */
- vm_object_t object; /* which object am I in (O&P) */
- vm_object_offset_t offset; /* offset into that object (O,P) */
+#define VM_PAGE_Q_STATE_ARRAY_SIZE (VM_PAGE_Q_STATE_LAST_VALID_VALUE+1)
+
+#define pageq pageq_un.vm_page_pageq
+#define snext pageq_un.vm_page_snext
+
+struct vm_page {
+ union {
+ vm_page_queue_chain_t vm_page_pageq; /* queue info for FIFO queue or free list (P) */
+ struct vm_page *vm_page_snext;
+ } pageq_un;
+
+ vm_page_queue_chain_t listq; /* all pages in same object (O) */
+
+#if CONFIG_BACKGROUND_QUEUE
+ vm_page_queue_chain_t vm_page_backgroundq; /* anonymous pages in the background pool (P) */
+#endif
+
+ vm_object_offset_t offset; /* offset into that object (O,P) */
+ vm_page_object_t vm_page_object; /* which object am I in (O&P) */
+
+ /*
+ * The following word of flags is protected
+ * by the "page queues" lock.
+ *
+ * we use the 'wire_count' field to store the local
+ * queue id if local queues are enabled...
+ * see the comments at 'vm_page_queues_remove' as to
+ * why this is safe to do
+ */
+#define local_id wire_count
unsigned int wire_count:16, /* how many wired down maps use me? (O&P) */
- page_ticket:4, /* age of the page on the */
- /* inactive queue. */
- /* boolean_t */ inactive:1, /* page is in inactive list (P) */
- active:1, /* page is in active list (P) */
- laundry:1, /* page is being cleaned now (P)*/
- free:1, /* page is on free list (P) */
- reference:1, /* page has been used (P) */
- pageout:1, /* page wired & busy for pageout (P) */
+ vm_page_q_state:4, /* which q is the page on (P) */
+
+ vm_page_in_background:1,
+ vm_page_on_backgroundq:1,
+ /* boolean_t */
gobbled:1, /* page used internally (P) */
+ laundry:1, /* page is being cleaned now (P)*/
+ no_cache:1, /* page is not to be cached and should
+ * be reused ahead of other pages (P) */
private:1, /* Page should not be returned to
- * the free list (O) */
- :0;
+ * the free list (P) */
+ reference:1, /* page has been used (P) */
+ __unused_pageq_bits:5; /* 5 bits available here */
+
+ /*
+ * MUST keep the 2 32 bit words used as bit fields
+ * separated since the compiler has a nasty habit
+ * of using 64 bit loads and stores on them as
+ * if they were a single 64 bit field... since
+ * they are protected by 2 different locks, this
+ * is a real problem
+ */
+ vm_page_packed_t next_m; /* VP bucket link (O) */
+
+ /*
+ * The following word of flags is protected
+ * by the "VM object" lock.
+ */
unsigned int
- page_error:8, /* error from I/O operations */
/* boolean_t */ busy:1, /* page is in transit (O) */
wanted:1, /* someone is waiting for page (O) */
tabled:1, /* page is in VP table (O) */
+ hashed:1, /* page is in vm_page_buckets[]
+ (O) + the bucket lock */
fictitious:1, /* Physical page doesn't exist (O) */
- no_isync:1, /* page has not been instruction synced */
+ /*
+ * IMPORTANT: the "pmapped", "xpmapped" and "clustered" bits can be modified while holding the
+ * VM object "shared" lock + the page lock provided through the pmap_lock_phys_page function.
+ * This is done in vm_fault_enter and the CONSUME_CLUSTERED macro.
+ * It's also ok to modify them behind just the VM object "exclusive" lock.
+ */
+ clustered:1, /* page is not the faulted page (O) or (O-shared AND pmap_page) */
+ pmapped:1, /* page has been entered at some
+ * point into a pmap (O) or (O-shared AND pmap_page) */
+ xpmapped:1, /* page has been entered with execute permission (O)
+ or (O-shared AND pmap_page) */
+
+ wpmapped:1, /* page has been entered at some
+ * point into a pmap for write (O) */
+ free_when_done:1, /* page is to be freed once cleaning is completed (O) */
absent:1, /* Data has been requested, but is
* not yet available (O) */
error:1, /* Data manager was unable to provide
cleaning:1, /* Page clean has begun (O) */
precious:1, /* Page is precious; data must be
* returned even if clean (O) */
- clustered:1, /* page is not the faulted page (O) */
overwriting:1, /* Request to unlock has been made
* without having data. (O)
* [See vm_fault_page_overwrite] */
restart:1, /* Page was pushed higher in shadow
chain by copy_call-related pagers;
start again at top of chain */
- lock_supplied:1,/* protection supplied by pager (O) */
- /* vm_prot_t */ page_lock:3, /* Uses prohibited by pager (O) */
- /* vm_prot_t */ unlock_request:3,/* Outstanding unlock request (O) */
unusual:1, /* Page is absent, error, restart or
page locked */
- discard_request:1,/* a memory_object_discard_request()
- * has been sent */
- list_req_pending:1, /* pagein/pageout alt mechanism */
- /* allows creation of list */
- /* requests on pages that are */
- /* actively being paged. */
- dump_cleaning:1; /* set by the pageout daemon when */
- /* a page being cleaned is */
- /* encountered and targeted as */
- /* a pageout candidate */
- /* we've used up all 32 bits */
-
- vm_offset_t phys_addr; /* Physical address of page, passed
+ cs_validated:1, /* code-signing: page was checked */
+ cs_tainted:1, /* code-signing: page is tainted */
+ cs_nx:1, /* code-signing: page is nx */
+ reusable:1,
+ lopage:1,
+ slid:1,
+ written_by_kernel:1, /* page was written by kernel (i.e. decompressed) */
+ __unused_object_bits:7; /* 7 bits available here */
+
+#if !defined(__arm__) && !defined(__arm64__)
+ ppnum_t phys_page; /* Physical address of page, passed
* to pmap_enter (read-only) */
+#endif
};
+
typedef struct vm_page *vm_page_t;
+extern vm_page_t vm_pages;
+extern vm_page_t vm_page_array_beginning_addr;
+extern vm_page_t vm_page_array_ending_addr;
-#define VM_PAGE_NULL ((vm_page_t) 0)
-#define NEXT_PAGE(m) ((vm_page_t) (m)->pageq.next)
+
+#if defined(__arm__) || defined(__arm64__)
+
+extern unsigned int vm_first_phys_ppnum;
+
+struct vm_page_with_ppnum {
+ struct vm_page vm_page_wo_ppnum;
+
+ ppnum_t phys_page;
+};
+typedef struct vm_page_with_ppnum *vm_page_with_ppnum_t;
+
+
+static inline ppnum_t VM_PAGE_GET_PHYS_PAGE(vm_page_t m)
+{
+ if (m >= vm_page_array_beginning_addr && m < vm_page_array_ending_addr)
+ return ((ppnum_t)((uintptr_t)(m - vm_page_array_beginning_addr) + vm_first_phys_ppnum));
+ else
+ return (((vm_page_with_ppnum_t)m)->phys_page);
+}
+
+#define VM_PAGE_SET_PHYS_PAGE(m, ppnum) \
+ MACRO_BEGIN \
+ if ((m) < vm_page_array_beginning_addr || (m) >= vm_page_array_ending_addr) \
+ ((vm_page_with_ppnum_t)(m))->phys_page = ppnum; \
+ assert(ppnum == VM_PAGE_GET_PHYS_PAGE(m)); \
+ MACRO_END
+
+#define VM_PAGE_GET_COLOR(m) (VM_PAGE_GET_PHYS_PAGE(m) & vm_color_mask)
+
+#else /* defined(__arm__) || defined(__arm64__) */
+
+
+struct vm_page_with_ppnum {
+ struct vm_page vm_page_with_ppnum;
+};
+typedef struct vm_page_with_ppnum *vm_page_with_ppnum_t;
+
+
+#define VM_PAGE_GET_PHYS_PAGE(page) (page)->phys_page
+#define VM_PAGE_SET_PHYS_PAGE(page, ppnum) \
+ MACRO_BEGIN \
+ (page)->phys_page = ppnum; \
+ MACRO_END
+
+#define VM_PAGE_GET_CLUMP(m) ((VM_PAGE_GET_PHYS_PAGE(m)) >> vm_clump_shift)
+#define VM_PAGE_GET_COLOR(m) ((VM_PAGE_GET_CLUMP(m)) & vm_color_mask)
+
+#endif /* defined(__arm__) || defined(__arm64__) */
+
+
+
+#if defined(__LP64__)
+
+#define VM_VPLQ_ALIGNMENT 128
+#define VM_PACKED_POINTER_ALIGNMENT 64 /* must be a power of 2 */
+#define VM_PACKED_POINTER_SHIFT 6
+
+#define VM_PACKED_FROM_VM_PAGES_ARRAY 0x80000000
+
+static inline vm_page_packed_t vm_page_pack_ptr(uintptr_t p)
+{
+ vm_page_packed_t packed_ptr;
+
+ if (!p)
+ return ((vm_page_packed_t)0);
+
+ if (p >= (uintptr_t)(vm_page_array_beginning_addr) && p < (uintptr_t)(vm_page_array_ending_addr)) {
+ packed_ptr = ((vm_page_packed_t)(((vm_page_t)p - vm_page_array_beginning_addr)));
+ assert(! (packed_ptr & VM_PACKED_FROM_VM_PAGES_ARRAY));
+ packed_ptr |= VM_PACKED_FROM_VM_PAGES_ARRAY;
+ return packed_ptr;
+ }
+
+ assert((p & (VM_PACKED_POINTER_ALIGNMENT - 1)) == 0);
+
+ packed_ptr = ((vm_page_packed_t)(((uintptr_t)(p - (uintptr_t) VM_MIN_KERNEL_AND_KEXT_ADDRESS)) >> VM_PACKED_POINTER_SHIFT));
+ assert(packed_ptr != 0);
+ assert(! (packed_ptr & VM_PACKED_FROM_VM_PAGES_ARRAY));
+ return packed_ptr;
+}
+
+
+static inline uintptr_t vm_page_unpack_ptr(uintptr_t p)
+{
+ if (!p)
+ return ((uintptr_t)0);
+
+ if (p & VM_PACKED_FROM_VM_PAGES_ARRAY)
+ return ((uintptr_t)(&vm_pages[(uint32_t)(p & ~VM_PACKED_FROM_VM_PAGES_ARRAY)]));
+ return (((p << VM_PACKED_POINTER_SHIFT) + (uintptr_t) VM_MIN_KERNEL_AND_KEXT_ADDRESS));
+}
+
+
+#define VM_PAGE_PACK_PTR(p) vm_page_pack_ptr((uintptr_t)(p))
+#define VM_PAGE_UNPACK_PTR(p) vm_page_unpack_ptr((uintptr_t)(p))
+
+#define VM_PAGE_OBJECT(p) ((vm_object_t)(VM_PAGE_UNPACK_PTR(p->vm_page_object)))
+#define VM_PAGE_PACK_OBJECT(o) ((vm_page_object_t)(VM_PAGE_PACK_PTR(o)))
+
+
+#define VM_PAGE_ZERO_PAGEQ_ENTRY(p) \
+MACRO_BEGIN \
+ (p)->snext = 0; \
+MACRO_END
+
+
+#define VM_PAGE_CONVERT_TO_QUEUE_ENTRY(p) VM_PAGE_PACK_PTR(p)
+
+
+static __inline__ void
+vm_page_enqueue_tail(
+ vm_page_queue_t que,
+ vm_page_queue_entry_t elt)
+{
+ vm_page_queue_entry_t old_tail;
+
+ old_tail = (vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR(que->prev);
+ elt->next = VM_PAGE_PACK_PTR(que);
+ elt->prev = que->prev;
+ old_tail->next = VM_PAGE_PACK_PTR(elt);
+ que->prev = VM_PAGE_PACK_PTR(elt);
+}
+
+
+static __inline__ void
+vm_page_remque(
+ vm_page_queue_entry_t elt)
+{
+ vm_page_queue_entry_t next_elt, prev_elt;
+
+ next_elt = (vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR(elt->next);
+
+ /* next_elt may equal prev_elt (and the queue head) if elt was the only element */
+ prev_elt = (vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR(elt->prev);
+
+ next_elt->prev = VM_PAGE_PACK_PTR(prev_elt);
+ prev_elt->next = VM_PAGE_PACK_PTR(next_elt);
+
+ elt->next = 0;
+ elt->prev = 0;
+}
+
+
+/*
+ * Macro: vm_page_queue_init
+ * Function:
+ * Initialize the given queue.
+ * Header:
+ * void vm_page_queue_init(q)
+ * vm_page_queue_t q; \* MODIFIED *\
+ */
+#define vm_page_queue_init(q) \
+MACRO_BEGIN \
+ assert((((uintptr_t)q) & (VM_PACKED_POINTER_ALIGNMENT-1)) == 0); \
+ assert((VM_PAGE_UNPACK_PTR(VM_PAGE_PACK_PTR((uintptr_t)q))) == (uintptr_t)q); \
+ (q)->next = VM_PAGE_PACK_PTR(q); \
+ (q)->prev = VM_PAGE_PACK_PTR(q); \
+MACRO_END
+
+
+/*
+ * Macro: vm_page_queue_enter
+ * Function:
+ * Insert a new element at the tail of the queue.
+ * Header:
+ * void vm_page_queue_enter(q, elt, type, field)
+ * queue_t q;
+ * <type> elt;
+ * <type> is what's in our queue
+ * <field> is the chain field in (*<type>)
+ * Note:
+ * This should only be used with Method 2 queue iteration (element chains)
+ */
+#define vm_page_queue_enter(head, elt, type, field) \
+MACRO_BEGIN \
+ vm_page_queue_entry_t __prev; \
+ \
+ __prev = ((vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR((head)->prev)); \
+ if ((head) == __prev) { \
+ (head)->next = VM_PAGE_PACK_PTR(elt); \
+ } \
+ else { \
+ ((type)(void *)__prev)->field.next = VM_PAGE_PACK_PTR(elt); \
+ } \
+ (elt)->field.prev = VM_PAGE_PACK_PTR(__prev); \
+ (elt)->field.next = VM_PAGE_PACK_PTR(head); \
+ (head)->prev = VM_PAGE_PACK_PTR(elt); \
+MACRO_END
+
+
+/*
+ * These are helper macros for vm_page_queue_enter_clump to assist
+ * with conditional compilation (release / debug / development)
+ */
+#if DEVELOPMENT || DEBUG
+
+#define __DEBUG_CHECK_BUDDIES(__check, __prev, __p, field) \
+MACRO_BEGIN \
+ if(__check) { /* if first forward buddy.. */ \
+ if(__prev) { /* ..and if a backward buddy was found, verify link consistency */ \
+ assert(__p == (vm_page_t) VM_PAGE_UNPACK_PTR(__prev->next)); \
+ assert(__prev == (vm_page_queue_entry_t) VM_PAGE_UNPACK_PTR(__p->field.prev)); \
+ } \
+ __check=0; \
+ } \
+MACRO_END
+
+#define __DEBUG_VERIFY_LINKS(__i, __first, __n_free, __last_next) \
+MACRO_BEGIN \
+ vm_page_queue_entry_t __tmp; \
+ for(__i=0, __tmp=__first; __i<__n_free; __i++) \
+ __tmp=(vm_page_queue_entry_t) VM_PAGE_UNPACK_PTR(__tmp->next); \
+ assert(__tmp == __last_next); \
+MACRO_END
+
+#define __DEBUG_STAT_INCREMENT_INRANGE vm_clump_inrange++
+#define __DEBUG_STAT_INCREMENT_INSERTS vm_clump_inserts++
+#define __DEBUG_STAT_INCREMENT_PROMOTES(__n_free) vm_clump_promotes+=__n_free
+
+#else
+
+#define __DEBUG_CHECK_BUDDIES(__check, __prev, __p, field) __check=1
+#define __DEBUG_VERIFY_LINKS(__i, __first, __n_free, __last_next)
+#define __DEBUG_STAT_INCREMENT_INRANGE
+#define __DEBUG_STAT_INCREMENT_INSERTS
+#define __DEBUG_STAT_INCREMENT_PROMOTES(__n_free)
+
+#endif /* if DEVELOPMENT || DEBUG */
+
+/*
+ * Macro: vm_page_queue_enter_clump
+ * Function:
+ * Insert a new element into the free queue and clump pages within the same 16K boundary together
+ *
+ * Header:
+ * void vm_page_queue_enter_clump(q, elt, type, field)
+ * queue_t q;
+ * <type> elt;
+ * <type> is what's in our queue
+ * <field> is the chain field in (*<type>)
+ * Note:
+ * This should only be used with Method 2 queue iteration (element chains)
+ */
+#if defined(__x86_64__)
+#define vm_page_queue_enter_clump(head, elt, type, field) \
+MACRO_BEGIN \
+ ppnum_t __clump_num; \
+ unsigned int __i, __n, __n_free=1, __check=1; \
+ vm_page_queue_entry_t __prev=0, __next, __last, __last_next, __first, __first_prev, __head_next; \
+ vm_page_t __p; \
+ \
+ /* if elt is part of vm_pages[] */ \
+ if((elt) >= vm_page_array_beginning_addr && (elt) < vm_page_array_boundary) { \
+ __first = __last = (vm_page_queue_entry_t) (elt); \
+ __clump_num = VM_PAGE_GET_CLUMP(elt); \
+ __n = VM_PAGE_GET_PHYS_PAGE(elt) & vm_clump_mask; \
+ /* scan backward looking for a buddy page */ \
+ for(__i=0, __p=(elt)-1; __i<__n && __p>=vm_page_array_beginning_addr; __i++, __p--) { \
+ if(__p->vm_page_q_state == VM_PAGE_ON_FREE_Q && __clump_num == VM_PAGE_GET_CLUMP(__p)) { \
+ if(__prev == 0) __prev = (vm_page_queue_entry_t) __p; \
+ __first = (vm_page_queue_entry_t) __p; \
+ __n_free++; \
+ } \
+ } \
+ /* scan forward looking for a buddy page */ \
+ for(__i=__n+1, __p=(elt)+1; __i<vm_clump_size && __p<vm_page_array_boundary; __i++, __p++) { \
+ if(__p->vm_page_q_state == VM_PAGE_ON_FREE_Q && __clump_num == VM_PAGE_GET_CLUMP(__p)) { \
+ __DEBUG_CHECK_BUDDIES(__check, __prev, __p, field); \
+ if(__prev == 0) __prev = (vm_page_queue_entry_t) VM_PAGE_UNPACK_PTR(__p->field.prev); \
+ __last = (vm_page_queue_entry_t) __p; \
+ __n_free++; \
+ } \
+ } \
+ __DEBUG_STAT_INCREMENT_INRANGE; \
+ } \
+ /* if elt is not part of vm_pages or if 1st page in clump, insert at tail */ \
+ if(__prev == 0) __prev = (vm_page_queue_entry_t) VM_PAGE_UNPACK_PTR((head)->prev); \
+ \
+ /* insert the element */ \
+ __next = (vm_page_queue_entry_t) VM_PAGE_UNPACK_PTR(__prev->next); \
+ (elt)->field.next = __prev->next; \
+ (elt)->field.prev = __next->prev; \
+ __prev->next = __next->prev = VM_PAGE_PACK_PTR(elt); \
+ __DEBUG_STAT_INCREMENT_INSERTS; \
+ \
+ /* check if clump needs to be promoted to head */ \
+ if(__n_free >= vm_clump_promote_threshold && __n_free > 1) { \
+ __first_prev = (vm_page_queue_entry_t) VM_PAGE_UNPACK_PTR(__first->prev); \
+ if(__first_prev != (head)) { /* if not at head already */ \
+ __last_next = (vm_page_queue_entry_t) VM_PAGE_UNPACK_PTR(__last->next); \
+ /* verify that the links within the clump are consistent */ \
+ __DEBUG_VERIFY_LINKS(__i, __first, __n_free, __last_next); \
+ /* promote clump to head */ \
+ __first_prev->next = __last->next; \
+ __last_next->prev = __first->prev; \
+ __first->prev = VM_PAGE_PACK_PTR(head); \
+ __last->next = (head)->next; \
+ __head_next = (vm_page_queue_entry_t) VM_PAGE_UNPACK_PTR((head)->next); \
+ __head_next->prev = VM_PAGE_PACK_PTR(__last); \
+ (head)->next = VM_PAGE_PACK_PTR(__first); \
+ __DEBUG_STAT_INCREMENT_PROMOTES(__n_free); \
+ } \
+ } \
+MACRO_END
+#endif
+
+/*
+ * Macro: vm_page_queue_enter_first
+ * Function:
+ * Insert a new element at the head of the queue.
+ * Header:
+ * void queue_enter_first(q, elt, type, field)
+ * queue_t q;
+ * <type> elt;
+ * <type> is what's in our queue
+ * <field> is the chain field in (*<type>)
+ * Note:
+ * This should only be used with Method 2 queue iteration (element chains)
+ */
+#define vm_page_queue_enter_first(head, elt, type, field) \
+MACRO_BEGIN \
+ vm_page_queue_entry_t __next; \
+ \
+ __next = ((vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR((head)->next)); \
+ if ((head) == __next) { \
+ (head)->prev = VM_PAGE_PACK_PTR(elt); \
+ } \
+ else { \
+ ((type)(void *)__next)->field.prev = VM_PAGE_PACK_PTR(elt); \
+ } \
+ (elt)->field.next = VM_PAGE_PACK_PTR(__next); \
+ (elt)->field.prev = VM_PAGE_PACK_PTR(head); \
+ (head)->next = VM_PAGE_PACK_PTR(elt); \
+MACRO_END
+
+
+/*
+ * Macro: vm_page_queue_remove
+ * Function:
+ * Remove an arbitrary item from the queue.
+ * Header:
+ * void vm_page_queue_remove(q, qe, type, field)
+ * arguments as in vm_page_queue_enter
+ * Note:
+ * This should only be used with Method 2 queue iteration (element chains)
+ */
+#define vm_page_queue_remove(head, elt, type, field) \
+MACRO_BEGIN \
+ vm_page_queue_entry_t __next, __prev; \
+ \
+ __next = ((vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR((elt)->field.next)); \
+ __prev = ((vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR((elt)->field.prev)); \
+ \
+ if ((head) == __next) \
+ (head)->prev = VM_PAGE_PACK_PTR(__prev); \
+ else \
+ ((type)(void *)__next)->field.prev = VM_PAGE_PACK_PTR(__prev); \
+ \
+ if ((head) == __prev) \
+ (head)->next = VM_PAGE_PACK_PTR(__next); \
+ else \
+ ((type)(void *)__prev)->field.next = VM_PAGE_PACK_PTR(__next); \
+ \
+ (elt)->field.next = 0; \
+ (elt)->field.prev = 0; \
+MACRO_END
+
+
+/*
+ * Macro: vm_page_queue_remove_first
+ * Function:
+ * Remove and return the entry at the head of
+ * the queue.
+ * Header:
+ * vm_page_queue_remove_first(head, entry, type, field)
+ * entry is returned by reference
+ * Note:
+ * This should only be used with Method 2 queue iteration (element chains)
+ */
+#define vm_page_queue_remove_first(head, entry, type, field) \
+MACRO_BEGIN \
+ vm_page_queue_entry_t __next; \
+ \
+ (entry) = (type)(void *) VM_PAGE_UNPACK_PTR(((head)->next)); \
+ __next = ((vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR((entry)->field.next)); \
+ \
+ if ((head) == __next) \
+ (head)->prev = VM_PAGE_PACK_PTR(head); \
+ else \
+ ((type)(void *)(__next))->field.prev = VM_PAGE_PACK_PTR(head); \
+ (head)->next = VM_PAGE_PACK_PTR(__next); \
+ \
+ (entry)->field.next = 0; \
+ (entry)->field.prev = 0; \
+MACRO_END
+
+
+/*
+ * Macro: vm_page_queue_remove_first_with_clump
+ * Function:
+ * Remove and return the entry at the head of the free queue
+ * end is set to 1 to indicate that we just returned the last page in a clump
+ *
+ * Header:
+ * vm_page_queue_remove_first_with_clump(head, entry, type, field, end)
+ * entry is returned by reference
+ * end is returned by reference
+ * Note:
+ * This should only be used with Method 2 queue iteration (element chains)
+ */
+#if defined(__x86_64__)
+#define vm_page_queue_remove_first_with_clump(head, entry, type, field, end) \
+MACRO_BEGIN \
+ vm_page_queue_entry_t __next; \
+ \
+ (entry) = (type)(void *) VM_PAGE_UNPACK_PTR(((head)->next)); \
+ __next = ((vm_page_queue_entry_t)VM_PAGE_UNPACK_PTR((entry)->field.next)); \
+ \
+ (end)=0; \
+ if ((head) == __next) { \
+ (head)->prev = VM_PAGE_PACK_PTR(head); \
+ (end)=1; \
+ } \
+ else { \
+ ((type)(void *)(__next))->field.prev = VM_PAGE_PACK_PTR(head); \
+ if(VM_PAGE_GET_CLUMP(entry) != VM_PAGE_GET_CLUMP(((type)(void *)(__next)))) (end)=1; \
+ } \
+ (head)->next = VM_PAGE_PACK_PTR(__next); \
+ \
+ (entry)->field.next = 0; \
+ (entry)->field.prev = 0; \
+ \
+MACRO_END
+#endif
+
+/*
+ * Macro: vm_page_queue_end
+ * Function:
+ * Tests whether a new entry is really the end of
+ * the queue.
+ * Header:
+ * boolean_t vm_page_queue_end(q, qe)
+ * vm_page_queue_t q;
+ * vm_page_queue_entry_t qe;
+ */
+#define vm_page_queue_end(q, qe) ((q) == (qe))
+
+
+/*
+ * Macro: vm_page_queue_empty
+ * Function:
+ * Tests whether a queue is empty.
+ * Header:
+ * boolean_t vm_page_queue_empty(q)
+ * vm_page_queue_t q;
+ */
+#define vm_page_queue_empty(q) vm_page_queue_end((q), ((vm_page_queue_entry_t)vm_page_queue_first(q)))
+
+
+
+/*
+ * Macro: vm_page_queue_first
+ * Function:
+ * Returns the first entry in the queue,
+ * Header:
+ * uintpr_t vm_page_queue_first(q)
+ * vm_page_queue_t q; \* IN *\
+ */
+#define vm_page_queue_first(q) (VM_PAGE_UNPACK_PTR((q)->next))
+
+
+
+/*
+ * Macro: vm_page_queue_last
+ * Function:
+ * Returns the last entry in the queue.
+ * Header:
+ * vm_page_queue_entry_t queue_last(q)
+ * queue_t q; \* IN *\
+ */
+#define vm_page_queue_last(q) (VM_PAGE_UNPACK_PTR((q)->prev))
+
+
+
+/*
+ * Macro: vm_page_queue_next
+ * Function:
+ * Returns the entry after an item in the queue.
+ * Header:
+ * uintpr_t vm_page_queue_next(qc)
+ * vm_page_queue_t qc;
+ */
+#define vm_page_queue_next(qc) (VM_PAGE_UNPACK_PTR((qc)->next))
+
+
+
+/*
+ * Macro: vm_page_queue_prev
+ * Function:
+ * Returns the entry before an item in the queue.
+ * Header:
+ * uinptr_t vm_page_queue_prev(qc)
+ * vm_page_queue_t qc;
+ */
+#define vm_page_queue_prev(qc) (VM_PAGE_UNPACK_PTR((qc)->prev))
+
+
+
+/*
+ * Macro: vm_page_queue_iterate
+ * Function:
+ * iterate over each item in the queue.
+ * Generates a 'for' loop, setting elt to
+ * each item in turn (by reference).
+ * Header:
+ * vm_page_queue_iterate(q, elt, type, field)
+ * queue_t q;
+ * <type> elt;
+ * <type> is what's in our queue
+ * <field> is the chain field in (*<type>)
+ * Note:
+ * This should only be used with Method 2 queue iteration (element chains)
+ */
+#define vm_page_queue_iterate(head, elt, type, field) \
+ for ((elt) = (type)(void *) vm_page_queue_first(head); \
+ !vm_page_queue_end((head), (vm_page_queue_entry_t)(elt)); \
+ (elt) = (type)(void *) vm_page_queue_next(&(elt)->field))
+
+#else
+
+#define VM_VPLQ_ALIGNMENT 128
+#define VM_PACKED_POINTER_ALIGNMENT 4
+#define VM_PACKED_POINTER_SHIFT 0
+
+#define VM_PACKED_FROM_VM_PAGES_ARRAY 0
+
+#define VM_PAGE_PACK_PTR(p) (p)
+#define VM_PAGE_UNPACK_PTR(p) ((uintptr_t)(p))
+
+#define VM_PAGE_OBJECT(p) (vm_object_t)(p->vm_page_object)
+#define VM_PAGE_PACK_OBJECT(o) ((vm_page_object_t)(VM_PAGE_PACK_PTR(o)))
+
+
+#define VM_PAGE_ZERO_PAGEQ_ENTRY(p) \
+MACRO_BEGIN \
+ (p)->pageq.next = 0; \
+ (p)->pageq.prev = 0; \
+MACRO_END
+
+#define VM_PAGE_CONVERT_TO_QUEUE_ENTRY(p) ((queue_entry_t)(p))
+
+#define vm_page_remque remque
+#define vm_page_enqueue_tail enqueue_tail
+#define vm_page_queue_init queue_init
+#define vm_page_queue_enter queue_enter
+#define vm_page_queue_enter_first queue_enter_first
+#define vm_page_queue_remove queue_remove
+#define vm_page_queue_remove_first queue_remove_first
+#define vm_page_queue_end queue_end
+#define vm_page_queue_empty queue_empty
+#define vm_page_queue_first queue_first
+#define vm_page_queue_last queue_last
+#define vm_page_queue_next queue_next
+#define vm_page_queue_prev queue_prev
+#define vm_page_queue_iterate queue_iterate
+
+#endif
+
+
+
+/*
+ * VM_PAGE_MIN_SPECULATIVE_AGE_Q through VM_PAGE_MAX_SPECULATIVE_AGE_Q
+ * represents a set of aging bins that are 'protected'...
+ *
+ * VM_PAGE_SPECULATIVE_AGED_Q is a list of the speculative pages that have
+ * not yet been 'claimed' but have been aged out of the protective bins
+ * this occurs in vm_page_speculate when it advances to the next bin
+ * and discovers that it is still occupied... at that point, all of the
+ * pages in that bin are moved to the VM_PAGE_SPECULATIVE_AGED_Q. the pages
+ * in that bin are all guaranteed to have reached at least the maximum age
+ * we allow for a protected page... they can be older if there is no
+ * memory pressure to pull them from the bin, or there are no new speculative pages
+ * being generated to push them out.
+ * this list is the one that vm_pageout_scan will prefer when looking
+ * for pages to move to the underweight free list
+ *
+ * VM_PAGE_MAX_SPECULATIVE_AGE_Q * VM_PAGE_SPECULATIVE_Q_AGE_MS
+ * defines the amount of time a speculative page is normally
+ * allowed to live in the 'protected' state (i.e. not available
+ * to be stolen if vm_pageout_scan is running and looking for
+ * pages)... however, if the total number of speculative pages
+ * in the protected state exceeds our limit (defined in vm_pageout.c)
+ * and there are none available in VM_PAGE_SPECULATIVE_AGED_Q, then
+ * vm_pageout_scan is allowed to steal pages from the protected
+ * bucket even if they are underage.
+ *
+ * vm_pageout_scan is also allowed to pull pages from a protected
+ * bin if the bin has reached the "age of consent" we've set
+ */
+#define VM_PAGE_MAX_SPECULATIVE_AGE_Q 10
+#define VM_PAGE_MIN_SPECULATIVE_AGE_Q 1
+#define VM_PAGE_SPECULATIVE_AGED_Q 0
+
+#define VM_PAGE_SPECULATIVE_Q_AGE_MS 500
+
+struct vm_speculative_age_q {
+ /*
+ * memory queue for speculative pages via clustered pageins
+ */
+ vm_page_queue_head_t age_q;
+ mach_timespec_t age_ts;
+} __attribute__((aligned(VM_PACKED_POINTER_ALIGNMENT)));
+
+
+
+extern
+struct vm_speculative_age_q vm_page_queue_speculative[];
+
+extern int speculative_steal_index;
+extern int speculative_age_index;
+extern unsigned int vm_page_speculative_q_age_ms;
+
+
+typedef struct vm_locks_array {
+ char pad __attribute__ ((aligned (64)));
+ lck_mtx_t vm_page_queue_lock2 __attribute__ ((aligned (64)));
+ lck_mtx_t vm_page_queue_free_lock2 __attribute__ ((aligned (64)));
+ char pad2 __attribute__ ((aligned (64)));
+} vm_locks_array_t;
+
+
+#if CONFIG_BACKGROUND_QUEUE
+extern void vm_page_assign_background_state(vm_page_t mem);
+extern void vm_page_update_background_state(vm_page_t mem);
+extern void vm_page_add_to_backgroundq(vm_page_t mem, boolean_t first);
+extern void vm_page_remove_from_backgroundq(vm_page_t mem);
+#endif
+
+#define VM_PAGE_WIRED(m) ((m)->vm_page_q_state == VM_PAGE_IS_WIRED)
+#define NEXT_PAGE(m) ((m)->snext)
+#define NEXT_PAGE_PTR(m) (&(m)->snext)
/*
* XXX The unusual bit should not be necessary. Most of the bit
/*
* For debugging, this macro can be defined to perform
* some useful check on a page structure.
+ * INTENTIONALLY left as a no-op so that the
+ * current call-sites can be left intact for future uses.
+ */
+
+#define VM_PAGE_CHECK(mem) \
+ MACRO_BEGIN \
+ MACRO_END
+
+/* Page coloring:
+ *
+ * The free page list is actually n lists, one per color,
+ * where the number of colors is a function of the machine's
+ * cache geometry set at system initialization. To disable
+ * coloring, set vm_colors to 1 and vm_color_mask to 0.
+ * The boot-arg "colors" may be used to override vm_colors.
+ * Note that there is little harm in having more colors than needed.
*/
+
+#define MAX_COLORS 128
+#define DEFAULT_COLORS 32
-#define VM_PAGE_CHECK(mem)
+extern
+unsigned int vm_colors; /* must be in range 1..MAX_COLORS */
+extern
+unsigned int vm_color_mask; /* must be (vm_colors-1) */
+extern
+unsigned int vm_cache_geometry_colors; /* optimal #colors based on cache geometry */
+
+/*
+ * Wired memory is a very limited resource and we can't let users exhaust it
+ * and deadlock the entire system. We enforce the following limits:
+ *
+ * vm_user_wire_limit (default: all memory minus vm_global_no_user_wire_amount)
+ * how much memory can be user-wired in one user task
+ *
+ * vm_global_user_wire_limit (default: same as vm_user_wire_limit)
+ * how much memory can be user-wired in all user tasks
+ *
+ * vm_global_no_user_wire_amount (default: VM_NOT_USER_WIREABLE)
+ * how much memory must remain user-unwired at any time
+ */
+#define VM_NOT_USER_WIREABLE (64*1024*1024) /* 64MB */
+extern
+vm_map_size_t vm_user_wire_limit;
+extern
+vm_map_size_t vm_global_user_wire_limit;
+extern
+vm_map_size_t vm_global_no_user_wire_amount;
/*
* Each pageable resident page falls into one of three lists:
*
* free
- * Available for allocation now.
+ * Available for allocation now. The free list is
+ * actually an array of lists, one per color.
* inactive
* Not referenced in any map, but still has an
* object/offset-page mapping, and may be dirty.
* This is the list of pages that should be
- * paged out next.
+ * paged out next. There are actually two
+ * inactive lists, one for pages brought in from
+ * disk or other backing store, and another
+ * for "zero-filled" pages. See vm_pageout_scan()
+ * for the distinction and usage.
* active
* A list of pages which have been placed in
* at least one physical map. This list is
* ordered, in LRU-like fashion.
*/
+
+#define VPL_LOCK_SPIN 1
+
+struct vpl {
+ vm_page_queue_head_t vpl_queue;
+ unsigned int vpl_count;
+ unsigned int vpl_internal_count;
+ unsigned int vpl_external_count;
+#ifdef VPL_LOCK_SPIN
+ lck_spin_t vpl_lock;
+#else
+ lck_mtx_t vpl_lock;
+ lck_mtx_ext_t vpl_lock_ext;
+#endif
+};
+
+struct vplq {
+ union {
+ char cache_line_pad[VM_VPLQ_ALIGNMENT];
+ struct vpl vpl;
+ } vpl_un;
+};
+extern
+unsigned int vm_page_local_q_count;
+extern
+struct vplq *vm_page_local_q;
+extern
+unsigned int vm_page_local_q_soft_limit;
+extern
+unsigned int vm_page_local_q_hard_limit;
+extern
+vm_locks_array_t vm_page_locks;
+
+extern
+vm_page_queue_head_t vm_lopage_queue_free; /* low memory free queue */
+extern
+vm_page_queue_head_t vm_page_queue_active; /* active memory queue */
+extern
+vm_page_queue_head_t vm_page_queue_inactive; /* inactive memory queue for normal pages */
+#if CONFIG_SECLUDED_MEMORY
+extern
+vm_page_queue_head_t vm_page_queue_secluded; /* reclaimable pages secluded for Camera */
+#endif /* CONFIG_SECLUDED_MEMORY */
+extern
+vm_page_queue_head_t vm_page_queue_cleaned; /* clean-queue inactive memory */
+extern
+vm_page_queue_head_t vm_page_queue_anonymous; /* inactive memory queue for anonymous pages */
+extern
+vm_page_queue_head_t vm_page_queue_throttled; /* memory queue for throttled pageout pages */
+
+extern
+queue_head_t vm_objects_wired;
+extern
+lck_spin_t vm_objects_wired_lock;
+
+#if CONFIG_BACKGROUND_QUEUE
+
+#define VM_PAGE_BACKGROUND_TARGET_MAX 50000
+
+#define VM_PAGE_BG_DISABLED 0
+#define VM_PAGE_BG_LEVEL_1 1
+
+extern
+vm_page_queue_head_t vm_page_queue_background;
+extern
+uint64_t vm_page_background_promoted_count;
+extern
+uint32_t vm_page_background_count;
extern
-vm_page_t vm_page_queue_free; /* memory free queue */
+uint32_t vm_page_background_target;
extern
-vm_page_t vm_page_queue_fictitious; /* fictitious free queue */
+uint32_t vm_page_background_internal_count;
extern
-queue_head_t vm_page_queue_active; /* active memory queue */
+uint32_t vm_page_background_external_count;
extern
-queue_head_t vm_page_queue_inactive; /* inactive memory queue */
+uint32_t vm_page_background_mode;
+extern
+uint32_t vm_page_background_exclude_external;
+
+#endif
extern
vm_offset_t first_phys_addr; /* physical address for first_page */
vm_offset_t last_phys_addr; /* physical address for last_page */
extern
-int vm_page_free_count; /* How many pages are free? */
+unsigned int vm_page_free_count; /* How many pages are free? (sum of all colors) */
+extern
+unsigned int vm_page_active_count; /* How many pages are active? */
+extern
+unsigned int vm_page_inactive_count; /* How many pages are inactive? */
+#if CONFIG_SECLUDED_MEMORY
+extern
+unsigned int vm_page_secluded_count; /* How many pages are secluded? */
+extern
+unsigned int vm_page_secluded_count_free;
+extern
+unsigned int vm_page_secluded_count_inuse;
+#endif /* CONFIG_SECLUDED_MEMORY */
+extern
+unsigned int vm_page_cleaned_count; /* How many pages are in the clean queue? */
+extern
+unsigned int vm_page_throttled_count;/* How many inactives are throttled */
+extern
+unsigned int vm_page_speculative_count; /* How many speculative pages are unclaimed? */
+extern unsigned int vm_page_pageable_internal_count;
+extern unsigned int vm_page_pageable_external_count;
+extern
+unsigned int vm_page_xpmapped_external_count; /* How many pages are mapped executable? */
extern
-int vm_page_fictitious_count;/* How many fictitious pages are free? */
+unsigned int vm_page_external_count; /* How many pages are file-backed? */
extern
-int vm_page_active_count; /* How many pages are active? */
+unsigned int vm_page_internal_count; /* How many pages are anonymous? */
extern
-int vm_page_inactive_count; /* How many pages are inactive? */
+unsigned int vm_page_wire_count; /* How many pages are wired? */
extern
-int vm_page_wire_count; /* How many pages are wired? */
+unsigned int vm_page_wire_count_initial; /* How many pages wired at startup */
extern
-int vm_page_free_target; /* How many do we want free? */
+unsigned int vm_page_free_target; /* How many do we want free? */
extern
-int vm_page_free_min; /* When to wakeup pageout */
+unsigned int vm_page_free_min; /* When to wakeup pageout */
extern
-int vm_page_inactive_target;/* How many do we want inactive? */
+unsigned int vm_page_throttle_limit; /* When to throttle new page creation */
extern
-int vm_page_free_reserved; /* How many pages reserved to do pageout */
+uint32_t vm_page_creation_throttle; /* When to throttle new page creation */
extern
-int vm_page_laundry_count; /* How many pages being laundered? */
+unsigned int vm_page_inactive_target;/* How many do we want inactive? */
+#if CONFIG_SECLUDED_MEMORY
+extern
+unsigned int vm_page_secluded_target;/* How many do we want secluded? */
+#endif /* CONFIG_SECLUDED_MEMORY */
+extern
+unsigned int vm_page_anonymous_min; /* When it's ok to pre-clean */
+extern
+unsigned int vm_page_inactive_min; /* When to wakeup pageout */
+extern
+unsigned int vm_page_free_reserved; /* How many pages reserved to do pageout */
+extern
+unsigned int vm_page_throttle_count; /* Count of page allocations throttled */
+extern
+unsigned int vm_page_gobble_count;
+extern
+unsigned int vm_page_stolen_count; /* Count of stolen pages not acccounted in zones */
+
-decl_mutex_data(,vm_page_queue_lock)
- /* lock on active and inactive page queues */
-decl_mutex_data(,vm_page_queue_free_lock)
- /* lock on free page queue */
-decl_simple_lock_data(extern,vm_page_preppin_lock) /* lock for prep/pin */
+#if DEVELOPMENT || DEBUG
+extern
+unsigned int vm_page_speculative_used;
+#endif
+
+extern
+unsigned int vm_page_purgeable_count;/* How many pages are purgeable now ? */
+extern
+unsigned int vm_page_purgeable_wired_count;/* How many purgeable pages are wired now ? */
+extern
+uint64_t vm_page_purged_count; /* How many pages got purged so far ? */
extern unsigned int vm_page_free_wanted;
/* how many threads are waiting for memory */
-extern vm_offset_t vm_page_fictitious_addr;
+extern unsigned int vm_page_free_wanted_privileged;
+ /* how many VM privileged threads are waiting for memory */
+#if CONFIG_SECLUDED_MEMORY
+extern unsigned int vm_page_free_wanted_secluded;
+ /* how many threads are waiting for secluded memory */
+#endif /* CONFIG_SECLUDED_MEMORY */
+
+extern const ppnum_t vm_page_fictitious_addr;
/* (fake) phys_addr of fictitious pages */
+extern const ppnum_t vm_page_guard_addr;
+ /* (fake) phys_addr of guard pages */
+
+
+extern boolean_t vm_page_deactivate_hint;
+
+extern int vm_compressor_mode;
+
+/*
+ 0 = all pages avail ( default. )
+ 1 = disable high mem ( cap max pages to 4G)
+ 2 = prefer himem
+*/
+extern int vm_himemory_mode;
+
+extern boolean_t vm_lopage_needed;
+extern uint32_t vm_lopage_free_count;
+extern uint32_t vm_lopage_free_limit;
+extern uint32_t vm_lopage_lowater;
+extern boolean_t vm_lopage_refill;
+extern uint64_t max_valid_dma_address;
+extern ppnum_t max_valid_low_ppnum;
+
/*
* Prototypes for functions exported by this module.
*/
vm_offset_t *endp);
extern void vm_page_module_init(void);
+
+extern void vm_page_init_local_q(void);
extern void vm_page_create(
- vm_offset_t start,
- vm_offset_t end);
+ ppnum_t start,
+ ppnum_t end);
+
+extern vm_page_t kdp_vm_page_lookup(
+ vm_object_t object,
+ vm_object_offset_t offset);
extern vm_page_t vm_page_lookup(
vm_object_t object,
extern vm_page_t vm_page_grab_fictitious(void);
+extern vm_page_t vm_page_grab_guard(void);
+
extern void vm_page_release_fictitious(
vm_page_t page);
-extern boolean_t vm_page_convert(
- vm_page_t page);
-
extern void vm_page_more_fictitious(void);
extern int vm_pool_low(void);
extern vm_page_t vm_page_grab(void);
+extern vm_page_t vm_page_grab_options(int flags);
+#if CONFIG_SECLUDED_MEMORY
+#define VM_PAGE_GRAB_SECLUDED 0x00000001
+#endif /* CONFIG_SECLUDED_MEMORY */
-extern void vm_page_release(
- vm_page_t page);
+extern vm_page_t vm_page_grablo(void);
-extern void vm_page_release_limbo(
- vm_page_t page);
-
-extern void vm_page_limbo_exchange(
- vm_page_t limbo_m,
- vm_page_t new_m);
+extern void vm_page_release(
+ vm_page_t page,
+ boolean_t page_queues_locked);
extern boolean_t vm_page_wait(
int interruptible );
vm_object_t object,
vm_object_offset_t offset);
+extern vm_page_t vm_page_alloc_guard(
+ vm_object_t object,
+ vm_object_offset_t offset);
+
extern void vm_page_init(
vm_page_t page,
- vm_offset_t phys_addr);
+ ppnum_t phys_page,
+ boolean_t lopage);
extern void vm_page_free(
- vm_page_t page);
+ vm_page_t page);
+
+extern void vm_page_free_unlocked(
+ vm_page_t page,
+ boolean_t remove_from_hash);
extern void vm_page_activate(
vm_page_t page);
extern void vm_page_deactivate(
vm_page_t page);
+extern void vm_page_deactivate_internal(
+ vm_page_t page,
+ boolean_t clear_hw_reference);
+
+extern void vm_page_enqueue_cleaned(vm_page_t page);
+
+extern void vm_page_lru(
+ vm_page_t page);
+
+extern void vm_page_speculate(
+ vm_page_t page,
+ boolean_t new);
+
+extern void vm_page_speculate_ageit(
+ struct vm_speculative_age_q *aq);
+
+extern void vm_page_reactivate_all_throttled(void);
+
+extern void vm_page_reactivate_local(uint32_t lid, boolean_t force, boolean_t nolocks);
+
extern void vm_page_rename(
vm_page_t page,
vm_object_t new_object,
vm_object_t object,
vm_object_offset_t offset);
+extern void vm_page_insert_wired(
+ vm_page_t page,
+ vm_object_t object,
+ vm_object_offset_t offset,
+ vm_tag_t tag);
+
+extern void vm_page_insert_internal(
+ vm_page_t page,
+ vm_object_t object,
+ vm_object_offset_t offset,
+ vm_tag_t tag,
+ boolean_t queues_lock_held,
+ boolean_t insert_in_hash,
+ boolean_t batch_pmap_op,
+ boolean_t delayed_accounting,
+ uint64_t *delayed_ledger_update);
+
extern void vm_page_replace(
vm_page_t mem,
vm_object_t object,
vm_object_offset_t offset);
extern void vm_page_remove(
- vm_page_t page);
+ vm_page_t page,
+ boolean_t remove_from_hash);
extern void vm_page_zero_fill(
vm_page_t page);
vm_size_t len);
extern void vm_page_wire(
- vm_page_t page);
+ vm_page_t page,
+ vm_tag_t tag,
+ boolean_t check_memorystatus);
extern void vm_page_unwire(
- vm_page_t page);
+ vm_page_t page,
+ boolean_t queueit);
extern void vm_set_page_size(void);
extern void vm_page_gobble(
vm_page_t page);
+extern void vm_page_validate_cs(vm_page_t page);
+extern void vm_page_validate_cs_mapped(
+ vm_page_t page,
+ const void *kaddr);
+extern void vm_page_validate_cs_mapped_chunk(
+ vm_page_t page,
+ const void *kaddr,
+ vm_offset_t chunk_offset,
+ vm_size_t chunk_size,
+ boolean_t *validated,
+ unsigned *tainted);
+
+extern void vm_page_free_prepare_queues(
+ vm_page_t page);
+
+extern void vm_page_free_prepare_object(
+ vm_page_t page,
+ boolean_t remove_from_hash);
+
+#if CONFIG_IOSCHED
+extern wait_result_t vm_page_sleep(
+ vm_object_t object,
+ vm_page_t m,
+ int interruptible);
+#endif
+
+extern void vm_pressure_response(void);
+
+#if CONFIG_JETSAM
+extern void memorystatus_pages_update(unsigned int pages_avail);
+
+#define VM_CHECK_MEMORYSTATUS do { \
+ memorystatus_pages_update( \
+ vm_page_pageable_external_count + \
+ vm_page_free_count + \
+ (VM_DYNAMIC_PAGING_ENABLED() ? 0 : vm_page_purgeable_count) \
+ ); \
+ } while(0)
+
+#else /* CONFIG_JETSAM */
+
+#if CONFIG_EMBEDDED
+
+#define VM_CHECK_MEMORYSTATUS do {} while(0)
+
+#else /* CONFIG_EMBEDDED */
+
+#define VM_CHECK_MEMORYSTATUS vm_pressure_response()
+
+#endif /* CONFIG_EMBEDDED */
+
+#endif /* CONFIG_JETSAM */
+
/*
* Functions implemented as macros. m->wanted and m->busy are
* protected by the object lock.
*/
-#define PAGE_ASSERT_WAIT(m, interruptible) \
- MACRO_BEGIN \
- (m)->wanted = TRUE; \
- assert_wait((event_t) (m), (interruptible)); \
+#if CONFIG_EMBEDDED
+#define SET_PAGE_DIRTY(m, set_pmap_modified) \
+ MACRO_BEGIN \
+ vm_page_t __page__ = (m); \
+ if (__page__->dirty == FALSE && (set_pmap_modified)) { \
+ pmap_set_modify(VM_PAGE_GET_PHYS_PAGE(__page__)); \
+ } \
+ __page__->dirty = TRUE; \
MACRO_END
+#else /* CONFIG_EMBEDDED */
+#define SET_PAGE_DIRTY(m, set_pmap_modified) \
+ MACRO_BEGIN \
+ vm_page_t __page__ = (m); \
+ __page__->dirty = TRUE; \
+ MACRO_END
+#endif /* CONFIG_EMBEDDED */
+
+#define PAGE_ASSERT_WAIT(m, interruptible) \
+ (((m)->wanted = TRUE), \
+ assert_wait((event_t) (m), (interruptible)))
+
+#if CONFIG_IOSCHED
+#define PAGE_SLEEP(o, m, interruptible) \
+ vm_page_sleep(o, m, interruptible)
+#else
+#define PAGE_SLEEP(o, m, interruptible) \
+ (((m)->wanted = TRUE), \
+ thread_sleep_vm_object((o), (m), (interruptible)))
+#endif
#define PAGE_WAKEUP_DONE(m) \
MACRO_BEGIN \
#define VM_PAGE_FREE(p) \
MACRO_BEGIN \
- vm_page_lock_queues(); \
- vm_page_free(p); \
- vm_page_unlock_queues(); \
+ vm_page_free_unlocked(p, TRUE); \
MACRO_END
#define VM_PAGE_GRAB_FICTITIOUS(M) \
vm_page_more_fictitious(); \
MACRO_END
-#define VM_PAGE_THROTTLED() \
- (vm_page_free_count < (vm_page_free_target - \
- ((vm_page_free_target-vm_page_free_min)>>2)))
-
#define VM_PAGE_WAIT() ((void)vm_page_wait(THREAD_UNINT))
-#define vm_page_lock_queues() mutex_lock(&vm_page_queue_lock)
-#define vm_page_unlock_queues() mutex_unlock(&vm_page_queue_lock)
-#define vm_page_pin_lock() simple_lock(&vm_page_preppin_lock)
-#define vm_page_pin_unlock() simple_unlock(&vm_page_preppin_lock)
+#define vm_page_queue_lock (vm_page_locks.vm_page_queue_lock2)
+#define vm_page_queue_free_lock (vm_page_locks.vm_page_queue_free_lock2)
+
+#define vm_page_lock_queues() lck_mtx_lock(&vm_page_queue_lock)
+#define vm_page_trylock_queues() lck_mtx_try_lock(&vm_page_queue_lock)
+#define vm_page_unlock_queues() lck_mtx_unlock(&vm_page_queue_lock)
-#define VM_PAGE_QUEUES_REMOVE(mem) \
+#define vm_page_lockspin_queues() lck_mtx_lock_spin(&vm_page_queue_lock)
+#define vm_page_trylockspin_queues() lck_mtx_try_lock_spin(&vm_page_queue_lock)
+#define vm_page_lockconvert_queues() lck_mtx_convert_spin(&vm_page_queue_lock)
+
+#ifdef VPL_LOCK_SPIN
+#define VPL_LOCK_INIT(vlq, vpl_grp, vpl_attr) lck_spin_init(&vlq->vpl_lock, vpl_grp, vpl_attr)
+#define VPL_LOCK(vpl) lck_spin_lock(vpl)
+#define VPL_UNLOCK(vpl) lck_spin_unlock(vpl)
+#else
+#define VPL_LOCK_INIT(vlq, vpl_grp, vpl_attr) lck_mtx_init_ext(&vlq->vpl_lock, &vlq->vpl_lock_ext, vpl_grp, vpl_attr)
+#define VPL_LOCK(vpl) lck_mtx_lock_spin(vpl)
+#define VPL_UNLOCK(vpl) lck_mtx_unlock(vpl)
+#endif
+
+
+#if DEVELOPMENT || DEBUG
+#define VM_PAGE_SPECULATIVE_USED_ADD() \
MACRO_BEGIN \
- if (mem->active) { \
- assert(!mem->inactive); \
- queue_remove(&vm_page_queue_active, \
- mem, vm_page_t, pageq); \
- mem->active = FALSE; \
- if (!mem->fictitious) \
- vm_page_active_count--; \
+ OSAddAtomic(1, &vm_page_speculative_used); \
+ MACRO_END
+#else
+#define VM_PAGE_SPECULATIVE_USED_ADD()
+#endif
+
+
+#define VM_PAGE_CONSUME_CLUSTERED(mem) \
+ MACRO_BEGIN \
+ ppnum_t __phys_page; \
+ __phys_page = VM_PAGE_GET_PHYS_PAGE(mem); \
+ pmap_lock_phys_page(__phys_page); \
+ if (mem->clustered) { \
+ vm_object_t o; \
+ o = VM_PAGE_OBJECT(mem); \
+ assert(o); \
+ o->pages_used++; \
+ mem->clustered = FALSE; \
+ VM_PAGE_SPECULATIVE_USED_ADD(); \
+ } \
+ pmap_unlock_phys_page(__phys_page); \
+ MACRO_END
+
+
+#define VM_PAGE_COUNT_AS_PAGEIN(mem) \
+ MACRO_BEGIN \
+ { \
+ vm_object_t o; \
+ o = VM_PAGE_OBJECT(mem); \
+ DTRACE_VM2(pgin, int, 1, (uint64_t *), NULL); \
+ current_task()->pageins++; \
+ if (o->internal) { \
+ DTRACE_VM2(anonpgin, int, 1, (uint64_t *), NULL); \
+ } else { \
+ DTRACE_VM2(fspgin, int, 1, (uint64_t *), NULL); \
} \
- \
- if (mem->inactive) { \
- assert(!mem->active); \
- queue_remove(&vm_page_queue_inactive, \
- mem, vm_page_t, pageq); \
- mem->inactive = FALSE; \
- if (!mem->fictitious) \
- vm_page_inactive_count--; \
} \
MACRO_END
+/* adjust for stolen pages accounted elsewhere */
+#define VM_PAGE_MOVE_STOLEN(page_count) \
+ MACRO_BEGIN \
+ vm_page_stolen_count -= (page_count); \
+ vm_page_wire_count_initial -= (page_count); \
+ MACRO_END
+
+#define DW_vm_page_unwire 0x01
+#define DW_vm_page_wire 0x02
+#define DW_vm_page_free 0x04
+#define DW_vm_page_activate 0x08
+#define DW_vm_page_deactivate_internal 0x10
+#define DW_vm_page_speculate 0x20
+#define DW_vm_page_lru 0x40
+#define DW_vm_pageout_throttle_up 0x80
+#define DW_PAGE_WAKEUP 0x100
+#define DW_clear_busy 0x200
+#define DW_clear_reference 0x400
+#define DW_set_reference 0x800
+#define DW_move_page 0x1000
+#define DW_VM_PAGE_QUEUES_REMOVE 0x2000
+#define DW_enqueue_cleaned 0x4000
+#define DW_vm_phantom_cache_update 0x8000
+
+struct vm_page_delayed_work {
+ vm_page_t dw_m;
+ int dw_mask;
+};
+
+void vm_page_do_delayed_work(vm_object_t object, vm_tag_t tag, struct vm_page_delayed_work *dwp, int dw_count);
+
+extern unsigned int vm_max_delayed_work_limit;
+
+#define DEFAULT_DELAYED_WORK_LIMIT 32
+
+#define DELAYED_WORK_LIMIT(max) ((vm_max_delayed_work_limit >= max ? max : vm_max_delayed_work_limit))
+
+/*
+ * vm_page_do_delayed_work may need to drop the object lock...
+ * if it does, we need the pages it's looking at to
+ * be held stable via the busy bit, so if busy isn't already
+ * set, we need to set it and ask vm_page_do_delayed_work
+ * to clear it and wakeup anyone that might have blocked on
+ * it once we're done processing the page.
+ */
+
+#define VM_PAGE_ADD_DELAYED_WORK(dwp, mem, dw_cnt) \
+ MACRO_BEGIN \
+ if (mem->busy == FALSE) { \
+ mem->busy = TRUE; \
+ if ( !(dwp->dw_mask & DW_vm_page_free)) \
+ dwp->dw_mask |= (DW_clear_busy | DW_PAGE_WAKEUP); \
+ } \
+ dwp->dw_m = mem; \
+ dwp++; \
+ dw_cnt++; \
+ MACRO_END
+
+extern vm_page_t vm_object_page_grab(vm_object_t);
+
+#if VM_PAGE_BUCKETS_CHECK
+extern void vm_page_buckets_check(void);
+#endif /* VM_PAGE_BUCKETS_CHECK */
+
+extern void vm_page_queues_remove(vm_page_t mem, boolean_t remove_from_backgroundq);
+extern void vm_page_remove_internal(vm_page_t page);
+extern void vm_page_enqueue_inactive(vm_page_t mem, boolean_t first);
+extern void vm_page_enqueue_active(vm_page_t mem, boolean_t first);
+extern void vm_page_check_pageable_safe(vm_page_t page);
+
+
#endif /* _VM_VM_PAGE_H_ */
projects / apple / xnu.git / blobdiff