X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/91447636331957f3d9b5ca5b508f07c526b0074d..060df5ea7c632b1ac8cc8aac1fb59758165c2084:/osfmk/vm/vm_pageout.c?ds=sidebyside diff --git a/osfmk/vm/vm_pageout.c b/osfmk/vm/vm_pageout.c index d75ec79de..4098fb8bc 100644 --- a/osfmk/vm/vm_pageout.c +++ b/osfmk/vm/vm_pageout.c @@ -1,23 +1,29 @@ /* - * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2009 Apple 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@ @@ -74,17 +80,24 @@ #include #include #include +#include #include #include #include #include #include +#include #include #include #include #include +#include + +#if CONFIG_EMBEDDED +#include +#endif #include #include @@ -93,24 +106,29 @@ #include #include #include /* must be last */ +#include +#include /* * ENCRYPTED SWAP: */ -#ifdef __ppc__ -#include -#endif /* __ppc__ */ #include <../bsd/crypto/aes/aes.h> +extern u_int32_t random(void); /* from */ -extern ipc_port_t memory_manager_default; - +#if UPL_DEBUG +#include +#endif -#ifndef VM_PAGEOUT_BURST_ACTIVE_THROTTLE -#define VM_PAGEOUT_BURST_ACTIVE_THROTTLE 10000 /* maximum iterations of the active queue to move pages to inactive */ +#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 -#ifndef VM_PAGEOUT_BURST_INACTIVE_THROTTLE -#define VM_PAGEOUT_BURST_INACTIVE_THROTTLE 4096 /* maximum iterations of the inactive queue w/o stealing/cleaning a page */ +#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 #endif #ifndef VM_PAGEOUT_DEADLOCK_RELIEF @@ -141,6 +159,14 @@ extern ipc_port_t memory_manager_default; #define VM_PAGEOUT_IDLE_WAIT 10 /* milliseconds */ #endif /* VM_PAGEOUT_IDLE_WAIT */ +#ifndef VM_PAGE_SPECULATIVE_TARGET +#define VM_PAGE_SPECULATIVE_TARGET(total) ((total) * 1 / 20) +#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 @@ -164,7 +190,11 @@ extern ipc_port_t memory_manager_default; */ #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 */ /* @@ -173,9 +203,17 @@ extern ipc_port_t memory_manager_default; */ #ifndef VM_PAGE_FREE_MIN -#define VM_PAGE_FREE_MIN(free) (10 + (free) / 100) +#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 */ +#define VM_PAGE_FREE_MIN_LIMIT 1500 +#define VM_PAGE_FREE_TARGET_LIMIT 2000 + + /* * When vm_page_free_count falls below vm_page_free_reserved, * only vm-privileged threads can allocate pages. vm-privilege @@ -186,27 +224,26 @@ extern ipc_port_t memory_manager_default; #ifndef VM_PAGE_FREE_RESERVED #define VM_PAGE_FREE_RESERVED(n) \ - ((6 * VM_PAGE_LAUNDRY_MAX) + (n)) + ((unsigned) (6 * VM_PAGE_LAUNDRY_MAX) + (n)) #endif /* VM_PAGE_FREE_RESERVED */ - /* - * must hold the page queues lock to - * manipulate this structure + * When we dequeue pages from the inactive list, they are + * reactivated (ie, put back on the active queue) if referenced. + * However, it is possible to starve the free list if other + * processors are referencing pages faster than we can turn off + * the referenced bit. So we limit the number of reactivations + * we will make per call of vm_pageout_scan(). */ -struct vm_pageout_queue { - queue_head_t pgo_pending; /* laundry pages to be processed by pager's iothread */ - unsigned int pgo_laundry; /* current count of laundry pages on queue or in flight */ - unsigned int pgo_maxlaundry; - - unsigned int pgo_idle:1, /* iothread is blocked waiting for work to do */ - pgo_busy:1, /* iothread is currently processing request from pgo_pending */ - pgo_throttled:1,/* vm_pageout_scan thread needs a wakeup when pgo_laundry drops */ - :0; -}; - -#define VM_PAGE_Q_THROTTLED(q) \ - ((q)->pgo_laundry >= (q)->pgo_maxlaundry) +#define VM_PAGE_REACTIVATE_LIMIT_MAX 20000 +#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 100 /* @@ -226,11 +263,13 @@ static void vm_pageout_garbage_collect(int); static void vm_pageout_iothread_continue(struct vm_pageout_queue *); static void vm_pageout_iothread_external(void); static void vm_pageout_iothread_internal(void); -static void vm_pageout_queue_steal(vm_page_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; @@ -248,10 +287,14 @@ unsigned int vm_pageout_burst_inactive_throttle = 0; * from existing backing store and files */ unsigned int vm_accellerate_zf_pageout_trigger = 400; -unsigned int vm_zf_iterator; -unsigned int vm_zf_iterator_count = 40; -unsigned int last_page_zf; +unsigned int zf_queue_min_count = 100; +unsigned int vm_zf_queue_count = 0; + +#if defined(__ppc__) /* On ppc, vm statistics are still 32-bit */ unsigned int vm_zf_count = 0; +#else +uint64_t vm_zf_count __attribute__((aligned(8))) = 0; +#endif /* * These variables record the pageout daemon's actions: @@ -270,21 +313,31 @@ unsigned int vm_pageout_inactive_absent = 0; /* debugging */ unsigned int vm_pageout_inactive_used = 0; /* debugging */ unsigned int vm_pageout_inactive_clean = 0; /* debugging */ unsigned int vm_pageout_inactive_dirty = 0; /* debugging */ +unsigned int vm_pageout_inactive_deactivated = 0; /* debugging */ +unsigned int vm_pageout_inactive_zf = 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_active_throttled = 0; unsigned int vm_pageout_scan_inactive_throttled = 0; unsigned int vm_pageout_scan_throttle = 0; /* debugging */ +unsigned int vm_pageout_scan_throttle_aborted = 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_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_page_speculative_count_drifts = 0; +unsigned int vm_page_speculative_count_drift_max = 0; + /* * Backing store throttle when BS is exhausted */ @@ -293,6 +346,8 @@ unsigned int vm_backing_store_low = 0; unsigned int vm_pageout_out_of_line = 0; unsigned int vm_pageout_in_place = 0; +unsigned int vm_page_steal_pageout_page = 0; + /* * ENCRYPTED SWAP: * counters and statistics... @@ -304,10 +359,18 @@ 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 ? */ - struct vm_pageout_queue vm_pageout_queue_internal; struct vm_pageout_queue vm_pageout_queue_external; +unsigned int vm_page_speculative_target = 0; + +vm_object_t vm_pageout_scan_wants_object = VM_OBJECT_NULL; + +boolean_t (* volatile consider_buffer_cache_collect)(int) = NULL; + +#if DEVELOPMENT || DEBUG +unsigned long vm_cs_validated_resets = 0; +#endif /* * Routine: vm_backing_store_disable @@ -331,58 +394,6 @@ vm_backing_store_disable( } -/* - * Routine: vm_pageout_object_allocate - * Purpose: - * Allocate an object for use as out-of-line memory in a - * data_return/data_initialize message. - * The page must be in an unlocked object. - * - * If the page belongs to a trusted pager, cleaning in place - * will be used, which utilizes a special "pageout object" - * containing private alias pages for the real page frames. - * Untrusted pagers use normal out-of-line memory. - */ -vm_object_t -vm_pageout_object_allocate( - vm_page_t m, - vm_size_t size, - vm_object_offset_t offset) -{ - vm_object_t object = m->object; - vm_object_t new_object; - - assert(object->pager_ready); - - new_object = vm_object_allocate(size); - - if (object->pager_trusted) { - assert (offset < object->size); - - vm_object_lock(new_object); - new_object->pageout = TRUE; - new_object->shadow = object; - new_object->can_persist = FALSE; - new_object->copy_strategy = MEMORY_OBJECT_COPY_NONE; - new_object->shadow_offset = offset; - vm_object_unlock(new_object); - - /* - * Take a paging reference on the object. This will be dropped - * in vm_pageout_object_terminate() - */ - vm_object_lock(object); - vm_object_paging_begin(object); - vm_page_lock_queues(); - vm_page_unlock_queues(); - vm_object_unlock(object); - - vm_pageout_in_place++; - } else - vm_pageout_out_of_line++; - return(new_object); -} - #if MACH_CLUSTER_STATS unsigned long vm_pageout_cluster_dirtied = 0; unsigned long vm_pageout_cluster_cleaned = 0; @@ -400,8 +411,7 @@ unsigned long vm_pageout_target_page_freed = 0; /* * Routine: vm_pageout_object_terminate * Purpose: - * Destroy the pageout_object allocated by - * vm_pageout_object_allocate(), and perform all of the + * Destroy the pageout_object, and perform all of the * required cleanup actions. * * In/Out conditions: @@ -412,7 +422,6 @@ vm_pageout_object_terminate( vm_object_t object) { vm_object_t shadow_object; - boolean_t shadow_internal; /* * Deal with the deallocation (last reference) of a pageout object @@ -423,7 +432,6 @@ vm_pageout_object_terminate( assert(object->pageout); shadow_object = object->shadow; vm_object_lock(shadow_object); - shadow_internal = shadow_object->internal; while (!queue_empty(&object->memq)) { vm_page_t p, m; @@ -453,11 +461,6 @@ vm_pageout_object_terminate( /* caller's page list indication */ m->dump_cleaning = FALSE; - /* - * Account for the paging reference taken when - * m->cleaning was set on this page. - */ - vm_object_paging_end(shadow_object); assert((m->dirty) || (m->precious) || (m->busy && m->cleaning)); @@ -482,6 +485,7 @@ vm_pageout_object_terminate( 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++; @@ -503,8 +507,8 @@ vm_pageout_object_terminate( if (m->dirty) { CLUSTER_STAT(vm_pageout_target_page_dirtied++;) - vm_page_unwire(m);/* reactivates */ - VM_STAT(reactivations++); + vm_page_unwire(m, TRUE); /* reactivates */ + VM_STAT_INCR(reactivations); PAGE_WAKEUP_DONE(m); } else { CLUSTER_STAT(vm_pageout_target_page_freed++;) @@ -519,7 +523,7 @@ vm_pageout_object_terminate( * If prep_pin_count is nonzero, then someone is using the * page, so make it active. */ - if (!m->active && !m->inactive && !m->private) { + if (!m->active && !m->inactive && !m->throttled && !m->private) { if (m->reference) vm_page_activate(m); else @@ -538,20 +542,15 @@ vm_pageout_object_terminate( /* will take care of resetting dirty. We clear the */ /* modify however for the Programmed I/O case. */ pmap_clear_modify(m->phys_page); - if(m->absent) { - m->absent = FALSE; - if(shadow_object->absent_count == 1) - vm_object_absent_release(shadow_object); - else - shadow_object->absent_count--; - } + + m->absent = FALSE; m->overwriting = FALSE; } else if (m->overwriting) { /* alternate request page list, write to page_list */ /* case. Occurs when the original page was wired */ /* at the time of the list request */ - assert(m->wire_count != 0); - vm_page_unwire(m);/* reactivates */ + assert(VM_PAGE_WIRED(m)); + vm_page_unwire(m, TRUE); /* reactivates */ m->overwriting = FALSE; } else { /* @@ -574,6 +573,7 @@ vm_pageout_object_terminate( #endif } m->cleaning = FALSE; + m->encrypted_cleaning = FALSE; /* * Wakeup any thread waiting for the page to be un-cleaning. @@ -584,170 +584,16 @@ vm_pageout_object_terminate( /* * Account for the paging reference taken in vm_paging_object_allocate. */ - vm_object_paging_end(shadow_object); + vm_object_activity_end(shadow_object); vm_object_unlock(shadow_object); assert(object->ref_count == 0); assert(object->paging_in_progress == 0); + assert(object->activity_in_progress == 0); assert(object->resident_page_count == 0); return; } -/* - * Routine: vm_pageout_setup - * Purpose: - * Set up a page for pageout (clean & flush). - * - * Move the page to a new object, as part of which it will be - * sent to its memory manager in a memory_object_data_write or - * memory_object_initialize message. - * - * The "new_object" and "new_offset" arguments - * indicate where the page should be moved. - * - * In/Out conditions: - * The page in question must not be on any pageout queues, - * and must be busy. The object to which it belongs - * must be unlocked, and the caller must hold a paging - * reference to it. The new_object must not be locked. - * - * This routine returns a pointer to a place-holder page, - * inserted at the same offset, to block out-of-order - * requests for the page. The place-holder page must - * be freed after the data_write or initialize message - * has been sent. - * - * The original page is put on a paging queue and marked - * not busy on exit. - */ -vm_page_t -vm_pageout_setup( - register vm_page_t m, - register vm_object_t new_object, - vm_object_offset_t new_offset) -{ - register vm_object_t old_object = m->object; - vm_object_offset_t paging_offset; - vm_object_offset_t offset; - register vm_page_t holding_page; - register vm_page_t new_m; - boolean_t need_to_wire = FALSE; - - - XPR(XPR_VM_PAGEOUT, - "vm_pageout_setup, obj 0x%X off 0x%X page 0x%X new obj 0x%X offset 0x%X\n", - (integer_t)m->object, (integer_t)m->offset, - (integer_t)m, (integer_t)new_object, - (integer_t)new_offset); - assert(m && m->busy && !m->absent && !m->fictitious && !m->error && - !m->restart); - - assert(m->dirty || m->precious); - - /* - * Create a place-holder page where the old one was, to prevent - * attempted pageins of this page while we're unlocked. - */ - VM_PAGE_GRAB_FICTITIOUS(holding_page); - - vm_object_lock(old_object); - - offset = m->offset; - paging_offset = offset + old_object->paging_offset; - - if (old_object->pager_trusted) { - /* - * This pager is trusted, so we can clean this page - * in place. Leave it in the old object, and mark it - * cleaning & pageout. - */ - new_m = holding_page; - holding_page = VM_PAGE_NULL; - - /* - * Set up new page to be private shadow of real page. - */ - new_m->phys_page = m->phys_page; - new_m->fictitious = FALSE; - new_m->pageout = TRUE; - - /* - * Mark real page as cleaning (indicating that we hold a - * paging reference to be released via m_o_d_r_c) and - * pageout (indicating that the page should be freed - * when the pageout completes). - */ - pmap_clear_modify(m->phys_page); - vm_page_lock_queues(); - new_m->private = TRUE; - vm_page_wire(new_m); - m->cleaning = TRUE; - m->pageout = TRUE; - - vm_page_wire(m); - assert(m->wire_count == 1); - vm_page_unlock_queues(); - - m->dirty = TRUE; - m->precious = FALSE; - m->page_lock = VM_PROT_NONE; - m->unusual = FALSE; - m->unlock_request = VM_PROT_NONE; - } else { - /* - * Cannot clean in place, so rip the old page out of the - * object, and stick the holding page in. Set new_m to the - * page in the new object. - */ - vm_page_lock_queues(); - VM_PAGE_QUEUES_REMOVE(m); - vm_page_remove(m); - - vm_page_insert(holding_page, old_object, offset); - vm_page_unlock_queues(); - - m->dirty = TRUE; - m->precious = FALSE; - new_m = m; - new_m->page_lock = VM_PROT_NONE; - new_m->unlock_request = VM_PROT_NONE; - - if (old_object->internal) - need_to_wire = TRUE; - } - /* - * Record that this page has been written out - */ -#if MACH_PAGEMAP - vm_external_state_set(old_object->existence_map, offset); -#endif /* MACH_PAGEMAP */ - - vm_object_unlock(old_object); - - vm_object_lock(new_object); - - /* - * Put the page into the new object. If it is a not wired - * (if it's the real page) it will be activated. - */ - - vm_page_lock_queues(); - vm_page_insert(new_m, new_object, new_offset); - if (need_to_wire) - vm_page_wire(new_m); - else - vm_page_activate(new_m); - PAGE_WAKEUP_DONE(new_m); - vm_page_unlock_queues(); - - vm_object_unlock(new_object); - - /* - * Return the placeholder page to simplify cleanup. - */ - return (holding_page); -} - /* * Routine: vm_pageclean_setup * @@ -755,9 +601,9 @@ vm_pageout_setup( * necessarily flushed from the VM page cache. * This is accomplished by cleaning in place. * - * The page must not be busy, and the object and page - * queues must be locked. - * + * The page must not be busy, and new_object + * must be locked. + * */ void vm_pageclean_setup( @@ -766,24 +612,17 @@ vm_pageclean_setup( vm_object_t new_object, vm_object_offset_t new_offset) { - vm_object_t old_object = m->object; assert(!m->busy); +#if 0 assert(!m->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", - (integer_t)old_object, m->offset, (integer_t)m, - (integer_t)new_m, new_offset); + m->object, m->offset, m, + new_m, new_offset); pmap_clear_modify(m->phys_page); - vm_object_paging_begin(old_object); - - /* - * Record that this page has been written out - */ -#if MACH_PAGEMAP - vm_external_state_set(old_object->existence_map, m->offset); -#endif /*MACH_PAGEMAP*/ /* * Mark original page as cleaning in place. @@ -797,64 +636,21 @@ vm_pageclean_setup( * 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; + + vm_page_lockspin_queues(); vm_page_wire(new_m); + vm_page_unlock_queues(); vm_page_insert(new_m, new_object, new_offset); assert(!new_m->wanted); new_m->busy = FALSE; } -void -vm_pageclean_copy( - vm_page_t m, - vm_page_t new_m, - vm_object_t new_object, - vm_object_offset_t new_offset) -{ - XPR(XPR_VM_PAGEOUT, - "vm_pageclean_copy, page 0x%X new_m 0x%X new_obj 0x%X offset 0x%X\n", - m, new_m, new_object, new_offset, 0); - - assert((!m->busy) && (!m->cleaning)); - - assert(!new_m->private && !new_m->fictitious); - - pmap_clear_modify(m->phys_page); - - m->busy = TRUE; - vm_object_paging_begin(m->object); - vm_page_unlock_queues(); - vm_object_unlock(m->object); - - /* - * Copy the original page to the new page. - */ - vm_page_copy(m, new_m); - - /* - * Mark the old page as clean. A request to pmap_is_modified - * will get the right answer. - */ - vm_object_lock(m->object); - m->dirty = FALSE; - - vm_object_paging_end(m->object); - - vm_page_lock_queues(); - if (!m->active && !m->inactive) - vm_page_activate(m); - PAGE_WAKEUP_DONE(m); - - vm_page_insert(new_m, new_object, new_offset); - vm_page_activate(new_m); - new_m->busy = FALSE; /* No other thread can be waiting */ -} - - /* * Routine: vm_pageout_initialize_page * Purpose: @@ -880,11 +676,11 @@ vm_pageout_initialize_page( vm_object_t object; vm_object_offset_t paging_offset; vm_page_t holding_page; - + memory_object_t pager; XPR(XPR_VM_PAGEOUT, "vm_pageout_initialize_page, page 0x%X\n", - (integer_t)m, 0, 0, 0, 0); + m, 0, 0, 0, 0); assert(m->busy); /* @@ -899,26 +695,44 @@ vm_pageout_initialize_page( */ object = m->object; paging_offset = m->offset + object->paging_offset; - vm_object_paging_begin(object); - if (m->absent || m->error || m->restart || - (!m->dirty && !m->precious)) { + + if (m->absent || m->error || m->restart || (!m->dirty && !m->precious)) { VM_PAGE_FREE(m); panic("reservation without pageout?"); /* alan */ - vm_object_unlock(object); + vm_object_unlock(object); + + return; + } + + /* + * 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"); return; } /* set the page for future call to vm_fault_list_request */ + vm_object_paging_begin(object); holding_page = NULL; - vm_page_lock_queues(); + pmap_clear_modify(m->phys_page); m->dirty = TRUE; m->busy = TRUE; m->list_req_pending = TRUE; m->cleaning = TRUE; m->pageout = TRUE; + + vm_page_lockspin_queues(); vm_page_wire(m); vm_page_unlock_queues(); + vm_object_unlock(object); /* @@ -929,11 +743,10 @@ vm_pageout_initialize_page( * [The object reference from its allocation is donated * to the eventual recipient.] */ - memory_object_data_initialize(object->pager, - paging_offset, - PAGE_SIZE); + memory_object_data_initialize(pager, paging_offset, PAGE_SIZE); vm_object_lock(object); + vm_object_paging_end(object); } #if MACH_CLUSTER_STATS @@ -945,7 +758,6 @@ struct { } cluster_stats[MAXCLUSTERPAGES]; #endif /* MACH_CLUSTER_STATS */ -boolean_t allow_clustered_pageouts = FALSE; /* * vm_pageout_cluster: @@ -971,13 +783,16 @@ vm_pageout_cluster(vm_page_t m) XPR(XPR_VM_PAGEOUT, "vm_pageout_cluster, object 0x%X offset 0x%X page 0x%X\n", - (integer_t)object, m->offset, (integer_t)m, 0, 0); + object, m->offset, m, 0, 0); + + VM_PAGE_CHECK(m); /* * Only a certain kind of page is appreciated here. */ - assert(m->busy && (m->dirty || m->precious) && (m->wire_count == 0)); + assert(m->busy && (m->dirty || m->precious) && (!VM_PAGE_WIRED(m))); assert(!m->cleaning && !m->pageout && !m->inactive && !m->active); + assert(!m->throttled); /* * protect the object from collapse - @@ -993,12 +808,16 @@ vm_pageout_cluster(vm_page_t m) m->list_req_pending = TRUE; m->cleaning = TRUE; m->pageout = TRUE; - m->laundry = TRUE; if (object->internal == TRUE) q = &vm_pageout_queue_internal; else q = &vm_pageout_queue_external; + + /* + * pgo_laundry count is tied to the laundry bit + */ + m->laundry = TRUE; q->pgo_laundry++; m->pageout_queue = TRUE; @@ -1008,13 +827,16 @@ vm_pageout_cluster(vm_page_t m) q->pgo_idle = FALSE; thread_wakeup((event_t) &q->pgo_pending); } + + VM_PAGE_CHECK(m); } unsigned long vm_pageout_throttle_up_count = 0; /* - * A page is back from laundry. See if there are some pages waiting to + * 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. * * Object and page queues must be locked. @@ -1025,23 +847,38 @@ vm_pageout_throttle_up( { struct vm_pageout_queue *q; - vm_pageout_throttle_up_count++; - - assert(m->laundry); assert(m->object != VM_OBJECT_NULL); assert(m->object != kernel_object); + vm_pageout_throttle_up_count++; + if (m->object->internal == TRUE) q = &vm_pageout_queue_internal; else q = &vm_pageout_queue_external; - m->laundry = FALSE; - q->pgo_laundry--; + if (m->pageout_queue == TRUE) { - if (q->pgo_throttled == TRUE) { - q->pgo_throttled = FALSE; - thread_wakeup((event_t) &q->pgo_laundry); + queue_remove(&q->pgo_pending, m, vm_page_t, pageq); + m->pageout_queue = FALSE; + + m->pageq.next = NULL; + m->pageq.prev = NULL; + + vm_object_paging_end(m->object); + } + if (m->laundry == TRUE) { + m->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)); + } } } @@ -1052,7 +889,7 @@ vm_pageout_throttle_up( * vm_page_free_wanted == 0. */ -#define DELAYED_UNLOCK_LIMIT (3 * MAX_UPL_TRANSFER) +#define VM_PAGEOUT_DELAYED_UNLOCK_LIMIT (3 * MAX_UPL_TRANSFER) #define FCS_IDLE 0 #define FCS_DELAYED 1 @@ -1063,8 +900,170 @@ struct flow_control { mach_timespec_t ts; }; -extern kern_return_t sysclk_gettime(mach_timespec_t *); +/* + * VM memory pressure monitoring. + * + * vm_pageout_scan() keeps track of the number of pages it considers and + * reclaims, in the currently active vm_pageout_stat[vm_pageout_stat_now]. + * + * compute_memory_pressure() is called every second from compute_averages() + * and moves "vm_pageout_stat_now" forward, to start accumulating the number + * of recalimed pages in a new vm_pageout_stat[] bucket. + * + * mach_vm_pressure_monitor() collects past statistics about memory pressure. + * The caller provides the number of seconds ("nsecs") worth of statistics + * it wants, up to 30 seconds. + * It computes the number of pages reclaimed in the past "nsecs" seconds and + * also returns the number of pages the system still needs to reclaim at this + * moment in time. + */ +#define VM_PAGEOUT_STAT_SIZE 31 +struct vm_pageout_stat { + unsigned int considered; + unsigned int reclaimed; +} vm_pageout_stats[VM_PAGEOUT_STAT_SIZE] = {{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) +#define VM_PAGEOUT_STAT_AFTER(i) \ + (((i) == VM_PAGEOUT_STAT_SIZE - 1) ? 0 : (i) + 1) + +/* + * Called from compute_averages(). + */ +void +compute_memory_pressure( + __unused void *arg) +{ + unsigned int vm_pageout_next; + + vm_memory_pressure = + vm_pageout_stats[VM_PAGEOUT_STAT_BEFORE(vm_pageout_stat_now)].reclaimed; + + commpage_set_memory_pressure( 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; + vm_pageout_stat_now = vm_pageout_next; +} + +unsigned int +mach_vm_ctl_page_free_wanted(void) +{ + unsigned int page_free_target, page_free_count, page_free_wanted; + + page_free_target = vm_page_free_target; + page_free_count = vm_page_free_count; + if (page_free_target > page_free_count) { + page_free_wanted = page_free_target - page_free_count; + } else { + page_free_wanted = 0; + } + + return page_free_wanted; +} + +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) +{ + wait_result_t wr; + unsigned int vm_pageout_then, vm_pageout_now; + unsigned int pages_reclaimed; + + /* + * 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() + * thread when it's trying to reclaim memory. We don't need fully + * accurate monitoring anyway... + */ + + if (wait_for_pressure) { + /* 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); + if (wr == THREAD_WAITING) { + wr = thread_block(THREAD_CONTINUE_NULL); + } + if (wr == THREAD_INTERRUPTED) { + return KERN_ABORTED; + } + if (wr == THREAD_AWAKENED) { + /* + * The memory pressure might have already + * been relieved but let's not block again + * and let's report that there was memory + * pressure at some point. + */ + break; + } + } + } + + /* provide the number of pages the system wants to reclaim */ + if (pages_wanted_p != NULL) { + *pages_wanted_p = mach_vm_ctl_page_free_wanted(); + } + + if (pages_reclaimed_p == NULL) { + return KERN_SUCCESS; + } + + /* 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); + *pages_reclaimed_p = pages_reclaimed; + + return KERN_SUCCESS; +} + +/* 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 +*/ + +#define PAGE_STATE_SPECULATIVE 1 +#define PAGE_STATE_THROTTLED 2 +#define PAGE_STATE_ZEROFILL 3 +#define PAGE_STATE_INACTIVE 4 + +#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 void vm_pageout_scan(void) @@ -1072,28 +1071,57 @@ vm_pageout_scan(void) unsigned int loop_count = 0; unsigned int inactive_burst_count = 0; unsigned int active_burst_count = 0; - vm_page_t local_freeq = 0; + unsigned int reactivated_this_call; + unsigned int reactivate_limit; + vm_page_t local_freeq = NULL; int local_freed = 0; - int delayed_unlock = 0; - int need_internal_inactive = 0; + int delayed_unlock; int refmod_state = 0; int vm_pageout_deadlock_target = 0; struct vm_pageout_queue *iq; struct vm_pageout_queue *eq; - struct flow_control flow_control; - boolean_t active_throttled = FALSE; + 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; +#if defined(__ppc__) /* On ppc, vm statistics are still 32-bit */ + unsigned int zf_ratio; + unsigned int zf_run_count; +#else + uint64_t zf_ratio; + uint64_t zf_run_count; +#endif + uint32_t catch_up_count = 0; + uint32_t inactive_reclaim_run; + boolean_t forced_reclaim; + int page_prev_state = 0; 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]; + XPR(XPR_VM_PAGEOUT, "vm_pageout_scan\n", 0, 0, 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; + + /*???*/ /* * We want to gradually dribble pages from the active queue * to the inactive queue. If we let the inactive queue get @@ -1119,36 +1147,92 @@ vm_pageout_scan(void) * aren't vm-privileged. If we kept sending dirty pages to them, * we could exhaust the free list. */ - vm_page_lock_queues(); - delayed_unlock = 1; Restart: + assert(delayed_unlock!=0); + + /* + * A page is "zero-filled" if it was not paged in from somewhere, + * and it belongs to an object at least VM_ZF_OBJECT_SIZE_THRESHOLD big. + * Recalculate the zero-filled page ratio. We use this to apportion + * victimized pages between the normal and zero-filled inactive + * queues according to their relative abundance in memory. Thus if a task + * is flooding memory with zf pages, we begin to hunt them down. + * It would be better to throttle greedy tasks at a higher level, + * but at the moment mach vm cannot do this. + */ + { +#if defined(__ppc__) /* On ppc, vm statistics are still 32-bit */ + uint32_t total = vm_page_active_count + vm_page_inactive_count; + uint32_t normal = total - vm_zf_count; +#else + uint64_t total = vm_page_active_count + vm_page_inactive_count; + uint64_t normal = total - vm_zf_count; +#endif + + /* zf_ratio is the number of zf pages we victimize per normal page */ + + if (vm_zf_count < vm_accellerate_zf_pageout_trigger) + zf_ratio = 0; + else if ((vm_zf_count <= normal) || (normal == 0)) + zf_ratio = 1; + else + zf_ratio = vm_zf_count / normal; + + zf_run_count = 0; + } + /* * Recalculate vm_page_inactivate_target. */ vm_page_inactive_target = VM_PAGE_INACTIVE_TARGET(vm_page_active_count + - vm_page_inactive_count); - object = NULL; + vm_page_inactive_count + + vm_page_speculative_count); + /* + * 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); + 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; - if (delayed_unlock == 0) - vm_page_lock_queues(); + DTRACE_VM2(rev, int, 1, (uint64_t *), NULL); - active_burst_count = vm_page_active_count; + if (delayed_unlock == 0) { + vm_page_lock_queues(); + delayed_unlock = 1; + } - if (active_burst_count > vm_pageout_burst_active_throttle) - active_burst_count = vm_pageout_burst_active_throttle; + /* + * 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); /* * Move pages from active to inactive. */ - while ((need_internal_inactive || - vm_page_inactive_count < vm_page_inactive_target) && - !queue_empty(&vm_page_queue_active) && - ((active_burst_count--) > 0)) { + if ((vm_page_inactive_count + vm_page_speculative_count) >= vm_page_inactive_target) + goto done_moving_active_pages; + + while (!queue_empty(&vm_page_queue_active) && active_burst_count) { + + if (active_burst_count) + active_burst_count--; vm_pageout_active++; @@ -1157,6 +1241,9 @@ Restart: assert(m->active && !m->inactive); assert(!m->laundry); assert(m->object != kernel_object); + assert(m->phys_page != vm_page_guard_addr); + + DTRACE_VM2(scan, int, 1, (uint64_t *), NULL); /* * Try to lock object; since we've already got the @@ -1172,8 +1259,9 @@ Restart: if (object != NULL) { vm_object_unlock(object); object = NULL; + vm_pageout_scan_wants_object = VM_OBJECT_NULL; } - if (!vm_object_lock_try(m->object)) { + if (!vm_object_lock_try_scan(m->object)) { /* * move page to end of active queue and continue */ @@ -1181,11 +1269,24 @@ Restart: vm_page_t, pageq); queue_enter(&vm_page_queue_active, m, vm_page_t, pageq); + + try_failed = TRUE; + m = (vm_page_t) queue_first(&vm_page_queue_active); + /* + * this is the next object we're going to be interested in + * try to make sure it's available after the mutex_yield + * returns control + */ + vm_pageout_scan_wants_object = m->object; + goto done_with_activepage; } object = m->object; + + try_failed = FALSE; } + /* * if the page is BUSY, then we pull it * off the active queue and leave it alone. @@ -1204,53 +1305,10 @@ Restart: goto done_with_activepage; } - if (need_internal_inactive) { - /* - * If we're unable to make forward progress - * with the current set of pages on the - * inactive queue due to busy objects or - * throttled pageout queues, then - * move a page that is already clean - * or belongs to a pageout queue that - * isn't currently throttled - */ - active_throttled = FALSE; - - if (object->internal) { - if ((VM_PAGE_Q_THROTTLED(iq) || !IP_VALID(memory_manager_default))) - active_throttled = TRUE; - } else if (VM_PAGE_Q_THROTTLED(eq)) { - active_throttled = TRUE; - } - if (active_throttled == TRUE) { - if (!m->dirty) { - refmod_state = pmap_get_refmod(m->phys_page); - - if (refmod_state & VM_MEM_REFERENCED) - m->reference = TRUE; - if (refmod_state & VM_MEM_MODIFIED) - m->dirty = TRUE; - } - if (m->dirty || m->precious) { - /* - * page is dirty and targets a THROTTLED queue - * so all we can do is move it back to the - * end of the active queue to get it out - * of the way - */ - queue_remove(&vm_page_queue_active, m, - vm_page_t, pageq); - queue_enter(&vm_page_queue_active, m, - vm_page_t, pageq); - vm_pageout_scan_active_throttled++; + /* deal with a rogue "reusable" page */ + VM_PAGEOUT_SCAN_HANDLE_REUSABLE_PAGE(m); - goto done_with_activepage; - } - } - vm_pageout_scan_active_throttle_success++; - need_internal_inactive--; - } /* * Deactivate the page while holding the object * locked, so we know the page is still not busy. @@ -1260,30 +1318,32 @@ Restart: * can handle that. */ vm_page_deactivate(m); + done_with_activepage: - if (delayed_unlock++ > DELAYED_UNLOCK_LIMIT) { + if (delayed_unlock++ > VM_PAGEOUT_DELAYED_UNLOCK_LIMIT || try_failed == TRUE) { if (object != NULL) { + vm_pageout_scan_wants_object = VM_OBJECT_NULL; vm_object_unlock(object); object = NULL; } if (local_freeq) { - vm_page_free_list(local_freeq); + vm_page_unlock_queues(); + vm_page_free_list(local_freeq, TRUE); - local_freeq = 0; + local_freeq = NULL; local_freed = 0; - } - delayed_unlock = 0; - vm_page_unlock_queues(); + vm_page_lock_queues(); + } else + lck_mtx_yield(&vm_page_queue_lock); + + delayed_unlock = 1; - mutex_pause(); - vm_page_lock_queues(); /* * continue the while loop processing * the active queue... need to hold * the page queues lock */ - continue; } } @@ -1295,7 +1355,7 @@ done_with_activepage: * and the inactive queue **********************************************************************/ - +done_moving_active_pages: /* * We are done if we have met our target *and* @@ -1306,25 +1366,145 @@ done_with_activepage: vm_object_unlock(object); object = NULL; } + vm_pageout_scan_wants_object = VM_OBJECT_NULL; + if (local_freeq) { - vm_page_free_list(local_freeq); + vm_page_unlock_queues(); + vm_page_free_list(local_freeq, TRUE); - local_freeq = 0; + local_freeq = NULL; local_freed = 0; + vm_page_lock_queues(); } - mutex_lock(&vm_page_queue_free_lock); + /* + * inactive target still not met... keep going + * until we get the queues balanced + */ + + /* + * 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); + +#ifndef CONFIG_EMBEDDED + /* + * XXX: if no active pages can be reclaimed, pageout scan can be stuck trying + * to balance the queues + */ + if (((vm_page_inactive_count + vm_page_speculative_count) < vm_page_inactive_target) && + !queue_empty(&vm_page_queue_active)) + continue; +#endif + + 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 == 0) && (vm_page_free_wanted_privileged == 0)) { vm_page_unlock_queues(); thread_wakeup((event_t) &vm_pageout_garbage_collect); + + assert(vm_pageout_scan_wants_object == VM_OBJECT_NULL); + return; } - mutex_unlock(&vm_page_queue_free_lock); + lck_mtx_unlock(&vm_page_queue_free_lock); + } + + /* + * 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. + */ + assert (available_for_purge>=0); + if (available_for_purge) + { + if (object != NULL) { + vm_object_unlock(object); + object = NULL; + } + if(TRUE == vm_purgeable_object_purge_one()) { + 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 (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 */ + 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); + } /* * Sometimes we have to pause: @@ -1333,17 +1513,23 @@ done_with_activepage: * 3) Loop control - no acceptable pages found on the inactive queue * within the last vm_pageout_burst_inactive_throttle iterations */ - if ((queue_empty(&vm_page_queue_inactive) && queue_empty(&vm_page_queue_zf))) { + if (queue_empty(&vm_page_queue_inactive) && queue_empty(&vm_page_queue_zf) && queue_empty(&sq->age_q) && + (VM_PAGE_Q_THROTTLED(iq) || queue_empty(&vm_page_queue_throttled))) { vm_pageout_scan_empty_throttle++; msecs = vm_pageout_empty_wait; goto vm_pageout_scan_delay; - } else if (inactive_burst_count >= vm_pageout_burst_inactive_throttle) { + } 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; goto vm_pageout_scan_delay; - } else if (VM_PAGE_Q_THROTTLED(iq)) { + } else if (VM_PAGE_Q_THROTTLED(iq) && IP_VALID(memory_manager_default)) { + clock_sec_t sec; + clock_nsec_t nsec; switch (flow_control.state) { @@ -1351,7 +1537,9 @@ done_with_activepage: reset_deadlock_timer: ts.tv_sec = vm_pageout_deadlock_wait / 1000; ts.tv_nsec = (vm_pageout_deadlock_wait % 1000) * 1000 * NSEC_PER_USEC; - sysclk_gettime(&flow_control.ts); + 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; @@ -1360,7 +1548,9 @@ reset_deadlock_timer: break; case FCS_DELAYED: - sysclk_gettime(&ts); + 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) { /* @@ -1376,10 +1566,10 @@ reset_deadlock_timer: * 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 pagings and allow the system to run to see what + * 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_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; @@ -1408,18 +1598,49 @@ vm_pageout_scan_delay: vm_object_unlock(object); object = NULL; } + vm_pageout_scan_wants_object = VM_OBJECT_NULL; + if (local_freeq) { - vm_page_free_list(local_freeq); + vm_page_unlock_queues(); + vm_page_free_list(local_freeq, TRUE); - local_freeq = 0; + 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; + vm_pageout_scan_throttle_aborted++; + goto consider_inactive; + } } - assert_wait_timeout((event_t) &iq->pgo_laundry, THREAD_INTERRUPTIBLE, msecs, 1000*NSEC_PER_USEC); +#if CONFIG_EMBEDDED + { + int percent_avail; + /* + * Decide if we need to send a memory status notification. + */ + percent_avail = + (vm_page_active_count + vm_page_inactive_count + + vm_page_speculative_count + vm_page_free_count + + (IP_VALID(memory_manager_default)?0:vm_page_purgeable_count) ) * 100 / + atop_64(max_mem); + if (percent_avail >= (kern_memorystatus_level + 5) || + percent_avail <= (kern_memorystatus_level - 5)) { + kern_memorystatus_level = percent_avail; + thread_wakeup((event_t)&kern_memorystatus_wakeup); + } + } +#endif + 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); + thread_block(THREAD_CONTINUE_NULL); vm_page_lock_queues(); @@ -1427,17 +1648,8 @@ vm_pageout_scan_delay: iq->pgo_throttled = FALSE; - if (loop_count >= vm_page_inactive_count) { - if (VM_PAGE_Q_THROTTLED(eq) || VM_PAGE_Q_THROTTLED(iq)) { - /* - * Make sure we move enough "appropriate" - * pages to the inactive queue before trying - * again. - */ - need_internal_inactive = vm_pageout_inactive_relief; - } + if (loop_count >= vm_page_inactive_count) loop_count = 0; - } inactive_burst_count = 0; goto Restart; @@ -1451,101 +1663,180 @@ consider_inactive: inactive_burst_count++; vm_pageout_inactive++; - if (!queue_empty(&vm_page_queue_inactive)) { - m = (vm_page_t) queue_first(&vm_page_queue_inactive); + /* Choose a victim. */ + + while (1) { + m = NULL; - if (m->clustered && (m->no_isync == TRUE)) { - goto use_this_page; + if (IP_VALID(memory_manager_default)) { + assert(vm_page_throttled_count == 0); + assert(queue_empty(&vm_page_queue_throttled)); } - } - if (vm_zf_count < vm_accellerate_zf_pageout_trigger) { - vm_zf_iterator = 0; - } else { - last_page_zf = 0; - if((vm_zf_iterator+=1) >= vm_zf_iterator_count) { - vm_zf_iterator = 0; + + /* + * 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); + break; } + /* + * Time for a zero-filled inactive page? + */ + if ( ((zf_run_count < zf_ratio) && vm_zf_queue_count >= zf_queue_min_count) || + queue_empty(&vm_page_queue_inactive)) { + if ( !queue_empty(&vm_page_queue_zf) ) { + m = (vm_page_t) queue_first(&vm_page_queue_zf); + zf_run_count++; + break; + } + } + /* + * It's either a normal inactive page or nothing. + */ + if ( !queue_empty(&vm_page_queue_inactive) ) { + m = (vm_page_t) queue_first(&vm_page_queue_inactive); + zf_run_count = 0; + break; + } + + panic("vm_pageout: no victim"); } - if (queue_empty(&vm_page_queue_zf) || - (((last_page_zf) || (vm_zf_iterator == 0)) && - !queue_empty(&vm_page_queue_inactive))) { - m = (vm_page_t) queue_first(&vm_page_queue_inactive); - last_page_zf = 0; - } else { - m = (vm_page_t) queue_first(&vm_page_queue_zf); - last_page_zf = 1; - } -use_this_page: - assert(!m->active && m->inactive); + + assert(!m->active && (m->inactive || m->speculative || m->throttled)); assert(!m->laundry); assert(m->object != kernel_object); + assert(m->phys_page != vm_page_guard_addr); + + if (!m->speculative) { + vm_pageout_stats[vm_pageout_stat_now].considered++; + } + + DTRACE_VM2(scan, int, 1, (uint64_t *), 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 + * 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; } - if (!vm_object_lock_try(m->object)) { + /* + * 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_pageout_inactive_nolock++; + + requeue_page: /* * Move page to end and continue. * Don't re-issue ticket */ if (m->zero_fill) { + if (m->speculative) { + panic("vm_pageout_scan(): page %p speculative and zero-fill !?\n", m); + } + assert(!m->speculative); queue_remove(&vm_page_queue_zf, m, vm_page_t, pageq); queue_enter(&vm_page_queue_zf, m, vm_page_t, pageq); + } else if (m->speculative) { + remque(&m->pageq); + m->speculative = FALSE; + vm_page_speculative_count--; + + /* + * move to the head of the inactive queue + * to get it out of the way... the speculative + * queue is generally too small to depend + * on there being enough pages from other + * objects to make cycling it back on the + * same queue a winning proposition + */ + queue_enter_first(&vm_page_queue_inactive, m, + vm_page_t, pageq); + m->inactive = TRUE; + vm_page_inactive_count++; + token_new_pagecount++; + } else if (m->throttled) { + queue_remove(&vm_page_queue_throttled, m, + vm_page_t, pageq); + m->throttled = FALSE; + vm_page_throttled_count--; + + /* + * not throttled any more, so can stick + * it on the inactive queue. + */ + queue_enter(&vm_page_queue_inactive, m, + vm_page_t, pageq); + m->inactive = TRUE; + vm_page_inactive_count++; + token_new_pagecount++; } else { queue_remove(&vm_page_queue_inactive, m, vm_page_t, pageq); +#if MACH_ASSERT + vm_page_inactive_count--; /* balance for purgeable queue asserts */ +#endif + vm_purgeable_q_advance_all(); + queue_enter(&vm_page_queue_inactive, m, vm_page_t, pageq); +#if MACH_ASSERT + vm_page_inactive_count++; /* balance for purgeable queue asserts */ +#endif + token_new_pagecount++; } - vm_pageout_inactive_nolock++; + pmap_clear_reference(m->phys_page); + m->reference = FALSE; + + if ( !queue_empty(&sq->age_q) ) + m = (vm_page_t) queue_first(&sq->age_q); + else if ( ((zf_run_count < zf_ratio) && vm_zf_queue_count >= zf_queue_min_count) || + queue_empty(&vm_page_queue_inactive)) { + if ( !queue_empty(&vm_page_queue_zf) ) + m = (vm_page_t) queue_first(&vm_page_queue_zf); + } else if ( !queue_empty(&vm_page_queue_inactive) ) { + m = (vm_page_t) queue_first(&vm_page_queue_inactive); + } + /* + * this is the next object we're going to be interested in + * try to make sure its available after the mutex_yield + * returns control + */ + vm_pageout_scan_wants_object = m->object; /* * force us to dump any collected free pages * and to pause before moving on */ - delayed_unlock = DELAYED_UNLOCK_LIMIT + 1; + try_failed = TRUE; goto done_with_inactivepage; } object = m->object; - } - /* - * If the page belongs to a purgable object with no pending copies - * against it, then we reap all of the pages in the object - * and note that the object has been "emptied". It'll be up to the - * application the discover this and recreate its contents if desired. - */ - if ((object->purgable == VM_OBJECT_PURGABLE_VOLATILE || - object->purgable == VM_OBJECT_PURGABLE_EMPTY) && - object->copy == VM_OBJECT_NULL) { - - (void) vm_object_purge(object); - vm_pageout_purged_objects++; - /* - * we've just taken all of the pages from this object, - * so drop the lock now since we're not going to find - * any more pages belonging to it anytime soon - */ - vm_object_unlock(object); - object = NULL; - - inactive_burst_count = 0; + vm_pageout_scan_wants_object = VM_OBJECT_NULL; - goto done_with_inactivepage; + try_failed = FALSE; } /* @@ -1569,43 +1860,58 @@ use_this_page: * one of its logically adjacent fellows is * targeted. */ - if (m->zero_fill) { - queue_remove(&vm_page_queue_zf, m, - vm_page_t, pageq); - queue_enter(&vm_page_queue_zf, m, - vm_page_t, pageq); - last_page_zf = 1; - vm_zf_iterator = vm_zf_iterator_count - 1; - } else { - queue_remove(&vm_page_queue_inactive, m, - vm_page_t, pageq); - queue_enter(&vm_page_queue_inactive, m, - vm_page_t, pageq); - last_page_zf = 0; - vm_zf_iterator = 1; - } vm_pageout_inactive_avoid++; - - goto done_with_inactivepage; + goto requeue_page; } /* - * Remove the page from the inactive list. + * Remove the page from its list. */ - if (m->zero_fill) { - queue_remove(&vm_page_queue_zf, m, vm_page_t, pageq); + if (m->speculative) { + remque(&m->pageq); + page_prev_state = PAGE_STATE_SPECULATIVE; + m->speculative = FALSE; + vm_page_speculative_count--; + } else if (m->throttled) { + queue_remove(&vm_page_queue_throttled, m, vm_page_t, pageq); + page_prev_state = PAGE_STATE_THROTTLED; + m->throttled = FALSE; + vm_page_throttled_count--; } else { - queue_remove(&vm_page_queue_inactive, m, vm_page_t, pageq); + if (m->zero_fill) { + queue_remove(&vm_page_queue_zf, m, vm_page_t, pageq); + page_prev_state = PAGE_STATE_ZEROFILL; + vm_zf_queue_count--; + } else { + page_prev_state = PAGE_STATE_INACTIVE; + queue_remove(&vm_page_queue_inactive, m, vm_page_t, pageq); + } + m->inactive = FALSE; + if (!m->fictitious) + vm_page_inactive_count--; + vm_purgeable_q_advance_all(); } + m->pageq.next = NULL; m->pageq.prev = NULL; - m->inactive = FALSE; - if (!m->fictitious) - vm_page_inactive_count--; - if (m->busy || !object->alive) { + if ( !m->fictitious && catch_up_count) + catch_up_count--; + + /* + * 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... + */ + if ( !m->encrypted_cleaning && (m->busy || !object->alive)) { /* * Somebody is already playing with this page. * Leave it off the pageout queues. + * */ vm_pageout_inactive_busy++; @@ -1623,10 +1929,24 @@ reclaim_page: vm_pageout_scan_inactive_throttle_success++; vm_pageout_deadlock_target--; } + + DTRACE_VM2(dfree, int, 1, (uint64_t *), NULL); + + if (object->internal) { + DTRACE_VM2(anonfree, int, 1, (uint64_t *), NULL); + } else { + DTRACE_VM2(fsfree, int, 1, (uint64_t *), NULL); + } + vm_page_free_prepare_queues(m); + + /* + * remove page from object here since we're already + * behind the object lock... defer the rest of the work + * we'd normally do in vm_page_free_prepare_object + * until 'vm_page_free_list' is called + */ if (m->tabled) - vm_page_remove(m); /* clears tabled, object, offset */ - if (m->absent) - vm_object_absent_release(object); + vm_page_remove(m, TRUE); assert(m->pageq.next == NULL && m->pageq.prev == NULL); @@ -1636,6 +1956,11 @@ reclaim_page: inactive_burst_count = 0; + if(page_prev_state != PAGE_STATE_SPECULATIVE) { + vm_pageout_stats[vm_pageout_stat_now].reclaimed++; + page_prev_state = 0; + } + goto done_with_inactivepage; } @@ -1662,11 +1987,45 @@ reclaim_page: goto done_with_inactivepage; } + /* + * 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) { + if (object->purgable == VM_PURGABLE_EMPTY) { + m->busy = TRUE; + if (m->pmapped == TRUE) { + /* unmap the page */ + refmod_state = pmap_disconnect(m->phys_page); + if (refmod_state & VM_MEM_MODIFIED) { + m->dirty = TRUE; + } + } + if (m->dirty || m->precious) { + /* we saved the cost of cleaning this page ! */ + vm_page_purged_count++; + } + goto reclaim_page; + } + if (object->purgable == VM_PURGABLE_VOLATILE) { + /* if it's wired, we can't put it on our queue */ + assert(!VM_PAGE_WIRED(m)); + /* just stick it back on! */ + goto reactivate_page; + } + } + /* * If it's being used, reactivate. * (Fictitious pages are either busy or absent.) + * First, update the reference and dirty bits + * to make sure the page is unreferenced. */ - if ( (!m->reference) ) { + refmod_state = -1; + + if (m->reference == FALSE && m->pmapped == TRUE) { refmod_state = pmap_get_refmod(m->phys_page); if (refmod_state & VM_MEM_REFERENCED) @@ -1674,21 +2033,68 @@ reclaim_page: if (refmod_state & VM_MEM_MODIFIED) m->dirty = TRUE; } - if (m->reference) { -was_referenced: - vm_page_activate(m); - VM_STAT(reactivations++); - vm_pageout_inactive_used++; - last_page_zf = 0; - inactive_burst_count = 0; + if (m->reference || m->dirty) { + /* deal with a rogue "reusable" page */ + VM_PAGEOUT_SCAN_HANDLE_REUSABLE_PAGE(m); + } - goto done_with_inactivepage; + if (m->reference && !m->no_cache) { + /* + * The page we pulled off the inactive list has + * been referenced. It is possible for other + * processors to be touching pages faster than we + * can clear the referenced bit and traverse the + * inactive queue, so we limit the number of + * reactivations. + */ + if (++reactivated_this_call >= reactivate_limit) { + vm_pageout_reactivation_limit_exceeded++; + } else if (catch_up_count) { + vm_pageout_catch_ups++; + } else if (++inactive_reclaim_run >= VM_PAGEOUT_INACTIVE_FORCE_RECLAIM) { + vm_pageout_inactive_force_reclaim++; + } else { + uint32_t isinuse; +reactivate_page: + 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++; + } else { + /* + * The page was/is being used, so put back on active list. + */ + vm_page_activate(m); + VM_STAT_INCR(reactivations); + } + vm_pageout_inactive_used++; + inactive_burst_count = 0; + + goto done_with_inactivepage; + } + /* + * 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 & VM_MEM_MODIFIED) + m->dirty = TRUE; + } + 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", - (integer_t)object, (integer_t)m->offset, (integer_t)m, 0,0); + object, m->offset, m, 0,0); /* * we've got a candidate page to steal... @@ -1696,40 +2102,56 @@ was_referenced: * m->dirty is up to date courtesy of the * preceding check for m->reference... if * we get here, then m->reference had to be - * FALSE which means we did a pmap_get_refmod - * and updated both m->reference and m->dirty + * FALSE (or possibly "reactivate_limit" was + * exceeded), but in either case we called + * pmap_get_refmod() and updated both + * m->reference and m->dirty * * if it's dirty or precious we need to * see if the target queue is throtttled * it if is, we need to skip over it by moving it back * to the end of the inactive queue */ + inactive_throttled = FALSE; if (m->dirty || m->precious) { if (object->internal) { - if ((VM_PAGE_Q_THROTTLED(iq) || !IP_VALID(memory_manager_default))) + if (VM_PAGE_Q_THROTTLED(iq)) inactive_throttled = TRUE; } else if (VM_PAGE_Q_THROTTLED(eq)) { - inactive_throttled = TRUE; + inactive_throttled = TRUE; } } if (inactive_throttled == TRUE) { - if (m->zero_fill) { - queue_enter(&vm_page_queue_zf, m, +throttle_inactive: + if (!IP_VALID(memory_manager_default) && + object->internal && m->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; + vm_page_throttled_count++; } else { - queue_enter(&vm_page_queue_inactive, m, - vm_page_t, pageq); + if (m->zero_fill) { + queue_enter(&vm_page_queue_zf, m, + vm_page_t, pageq); + vm_zf_queue_count++; + } else + queue_enter(&vm_page_queue_inactive, m, + vm_page_t, pageq); + m->inactive = TRUE; + if (!m->fictitious) { + vm_page_inactive_count++; + token_new_pagecount++; + } } - if (!m->fictitious) - vm_page_inactive_count++; - m->inactive = TRUE; - vm_pageout_scan_inactive_throttled++; - goto done_with_inactivepage; } + /* * we've got a page that we can steal... * eliminate all mappings and make sure @@ -1751,54 +2173,101 @@ was_referenced: * since we already set m->busy = TRUE, before * going off to reactivate it * - * if we don't need the pmap_disconnect, then - * m->dirty is up to date courtesy of the - * earlier check for m->reference... if - * we get here, then m->reference had to be - * FALSE which means we did a pmap_get_refmod - * and updated both m->reference and m->dirty... + * 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 and/or m->reference could + * have been set in anticipation of likely usage of the page. */ - if (m->no_isync == FALSE) { + if (m->pmapped == TRUE) { refmod_state = pmap_disconnect(m->phys_page); if (refmod_state & VM_MEM_MODIFIED) m->dirty = TRUE; if (refmod_state & VM_MEM_REFERENCED) { - m->reference = TRUE; - - PAGE_WAKEUP_DONE(m); - goto was_referenced; + + /* If m->reference is already set, this page must have + * already failed the reactivate_limit test, so don't + * bump the counts twice. + */ + if ( ! m->reference ) { + m->reference = TRUE; + if (forced_reclaim || + ++reactivated_this_call >= reactivate_limit) + vm_pageout_reactivation_limit_exceeded++; + else { + PAGE_WAKEUP_DONE(m); + goto reactivate_page; + } + } } } /* - * If it's clean and not precious, we can free the page. + * 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 (m->zero_fill) + vm_pageout_inactive_zf++; vm_pageout_inactive_clean++; + goto reclaim_page; } + + /* + * The page may have been dirtied since the last check + * for a throttled target queue (which may have been skipped + * if the page was clean then). With the dirty page + * disconnected here, we can make one final check. + */ + { + boolean_t disconnect_throttled = FALSE; + if (object->internal) { + if (VM_PAGE_Q_THROTTLED(iq)) + disconnect_throttled = TRUE; + } else if (VM_PAGE_Q_THROTTLED(eq)) { + disconnect_throttled = TRUE; + } + + if (disconnect_throttled == TRUE) { + PAGE_WAKEUP_DONE(m); + goto throttle_inactive; + } + } + + vm_pageout_stats[vm_pageout_stat_now].reclaimed++; + vm_pageout_cluster(m); + if (m->zero_fill) + vm_pageout_inactive_zf++; vm_pageout_inactive_dirty++; inactive_burst_count = 0; done_with_inactivepage: - if (delayed_unlock++ > DELAYED_UNLOCK_LIMIT) { + if (delayed_unlock++ > VM_PAGEOUT_DELAYED_UNLOCK_LIMIT || try_failed == TRUE) { if (object != NULL) { + vm_pageout_scan_wants_object = VM_OBJECT_NULL; vm_object_unlock(object); object = NULL; } if (local_freeq) { - vm_page_free_list(local_freeq); + vm_page_unlock_queues(); + vm_page_free_list(local_freeq, TRUE); - local_freeq = 0; + local_freeq = NULL; local_freed = 0; - } - delayed_unlock = 0; - vm_page_unlock_queues(); - mutex_pause(); + vm_page_lock_queues(); + } else + lck_mtx_yield(&vm_page_queue_lock); + + delayed_unlock = 1; } /* * back to top of pageout scan loop @@ -1822,11 +2291,20 @@ vm_page_free_reserve( vm_page_free_min = vm_page_free_reserved + 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; + vm_page_free_target = vm_page_free_reserved + 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_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 / 2; } /* @@ -1836,12 +2314,14 @@ vm_page_free_reserve( void vm_pageout_continue(void) { + DTRACE_VM2(pgrrun, int, 1, (uint64_t *), NULL); vm_pageout_scan_event_counter++; vm_pageout_scan(); /* we hold vm_page_queue_free_lock now */ assert(vm_page_free_wanted == 0); + assert(vm_page_free_wanted_privileged == 0); assert_wait((event_t) &vm_page_free_wanted, THREAD_UNINT); - mutex_unlock(&vm_page_queue_free_lock); + lck_mtx_unlock(&vm_page_queue_free_lock); counter(c_vm_pageout_block++); thread_block((thread_continue_t)vm_pageout_continue); @@ -1849,33 +2329,6 @@ vm_pageout_continue(void) } -/* - * must be called with the - * queues and object locks held - */ -static void -vm_pageout_queue_steal(vm_page_t m) -{ - struct vm_pageout_queue *q; - - if (m->object->internal == TRUE) - q = &vm_pageout_queue_internal; - else - q = &vm_pageout_queue_external; - - m->laundry = FALSE; - m->pageout_queue = FALSE; - queue_remove(&q->pgo_pending, m, vm_page_t, pageq); - - m->pageq.next = NULL; - m->pageq.prev = NULL; - - vm_object_paging_end(m->object); - - q->pgo_laundry--; -} - - #ifdef FAKE_DEADLOCK #define FAKE_COUNT 5000 @@ -1890,19 +2343,26 @@ vm_pageout_iothread_continue(struct vm_pageout_queue *q) { vm_page_t m = NULL; vm_object_t object; - boolean_t need_wakeup; + memory_object_t pager; + thread_t self = current_thread(); - vm_page_lock_queues(); + if ((vm_pageout_internal_iothread != THREAD_NULL) + && (self == vm_pageout_external_iothread ) + && (self->options & TH_OPT_VMPRIV)) + self->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); + VM_PAGE_CHECK(m); m->pageout_queue = FALSE; - vm_page_unlock_queues(); - m->pageq.next = NULL; m->pageq.prev = NULL; + vm_page_unlock_queues(); + #ifdef FAKE_DEADLOCK if (q == &vm_pageout_queue_internal) { vm_offset_t addr; @@ -1924,8 +2384,9 @@ vm_pageout_iothread_continue(struct vm_pageout_queue *q) #endif object = m->object; + vm_object_lock(object); + if (!object->pager_initialized) { - vm_object_lock(object); /* * If there is no memory object for the page, create @@ -1933,7 +2394,9 @@ vm_pageout_iothread_continue(struct vm_pageout_queue *q) */ if (!object->pager_initialized) - vm_object_collapse(object, (vm_object_offset_t)0); + vm_object_collapse(object, + (vm_object_offset_t) 0, + TRUE); if (!object->pager_initialized) vm_object_pager_create(object); if (!object->pager_initialized) { @@ -1944,16 +2407,12 @@ vm_pageout_iothread_continue(struct vm_pageout_queue *q) * Should only happen if there is no * default pager. */ - m->list_req_pending = FALSE; - m->cleaning = FALSE; - m->pageout = FALSE; - vm_page_unwire(m); - - vm_pageout_throttle_up(m); + vm_page_lockspin_queues(); - vm_page_lock_queues(); + vm_pageout_queue_steal(m, TRUE); vm_pageout_dirty_no_pager++; vm_page_activate(m); + vm_page_unlock_queues(); /* @@ -1964,27 +2423,45 @@ vm_pageout_iothread_continue(struct vm_pageout_queue *q) vm_object_paging_end(object); vm_object_unlock(object); - vm_page_lock_queues(); + vm_page_lockspin_queues(); continue; - } else if (object->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. + } + } + 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); + VM_PAGE_FREE(m); + } else { + vm_page_lockspin_queues(); - vm_object_paging_end(object); - vm_object_unlock(object); + vm_pageout_queue_steal(m, TRUE); + vm_page_activate(m); + + vm_page_unlock_queues(); - vm_page_lock_queues(); - continue; + /* + * And we are done with it. + */ + PAGE_WAKEUP_DONE(m); } + vm_object_paging_end(object); vm_object_unlock(object); + + vm_page_lockspin_queues(); + continue; } + VM_PAGE_CHECK(m); + vm_object_unlock(object); /* * we expect the paging_in_progress reference to have * already been taken on the object before it was added @@ -1997,7 +2474,7 @@ vm_pageout_iothread_continue(struct vm_pageout_queue *q) * Send the data to the pager. * any pageout clustering happens there */ - memory_object_data_return(object->pager, + memory_object_data_return(pager, m->offset + object->paging_offset, PAGE_SIZE, NULL, @@ -2010,24 +2487,22 @@ vm_pageout_iothread_continue(struct vm_pageout_queue *q) vm_object_paging_end(object); vm_object_unlock(object); - vm_page_lock_queues(); + vm_page_lockspin_queues(); } assert_wait((event_t) q, THREAD_UNINT); - if (q->pgo_throttled == TRUE && !VM_PAGE_Q_THROTTLED(q)) { q->pgo_throttled = FALSE; - need_wakeup = TRUE; - } else - need_wakeup = 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)); + } q->pgo_busy = FALSE; q->pgo_idle = TRUE; vm_page_unlock_queues(); - if (need_wakeup == TRUE) - thread_wakeup((event_t) &q->pgo_laundry); - thread_block_parameter((thread_continue_t)vm_pageout_iothread_continue, (void *) &q->pgo_pending); /*NOTREACHED*/ } @@ -2036,6 +2511,9 @@ vm_pageout_iothread_continue(struct vm_pageout_queue *q) static void vm_pageout_iothread_external(void) { + thread_t self = current_thread(); + + self->options |= TH_OPT_VMPRIV; vm_pageout_iothread_continue(&vm_pageout_queue_external); /*NOTREACHED*/ @@ -2053,10 +2531,21 @@ vm_pageout_iothread_internal(void) /*NOTREACHED*/ } +kern_return_t +vm_set_buffer_cleanup_callout(boolean_t (*func)(int)) +{ + if (OSCompareAndSwapPtr(NULL, func, (void * volatile *) &consider_buffer_cache_collect)) { + return KERN_SUCCESS; + } else { + return KERN_FAILURE; /* Already set */ + } +} + static void vm_pageout_garbage_collect(int collect) { if (collect) { + boolean_t buf_large_zfree = FALSE; stack_collect(); /* @@ -2064,7 +2553,10 @@ vm_pageout_garbage_collect(int collect) * might return memory to zones. */ consider_machine_collect(); - consider_zone_gc(); + if (consider_buffer_cache_collect != NULL) { + buf_large_zfree = (*consider_buffer_cache_collect)(0); + } + consider_zone_gc(buf_large_zfree); consider_machine_adjust(); } @@ -2093,6 +2585,10 @@ vm_pageout(void) self->priority = BASEPRI_PREEMPT - 1; set_sched_pri(self, self->priority); thread_unlock(self); + + if (!self->reserved_stack) + self->reserved_stack = self->kernel_stack; + splx(s); /* @@ -2132,7 +2628,7 @@ vm_pageout(void) task_unlock(kernel_task); vm_page_free_count_init = vm_page_free_count; - vm_zf_iterator = 0; + /* * even if we've already called vm_page_free_reserve * call it again here to insure that the targets are @@ -2152,115 +2648,216 @@ vm_pageout(void) vm_pageout_queue_external.pgo_idle = FALSE; vm_pageout_queue_external.pgo_busy = FALSE; vm_pageout_queue_external.pgo_throttled = FALSE; + vm_pageout_queue_external.pgo_draining = FALSE; queue_init(&vm_pageout_queue_internal.pgo_pending); - vm_pageout_queue_internal.pgo_maxlaundry = VM_PAGE_LAUNDRY_MAX; + vm_pageout_queue_internal.pgo_maxlaundry = 0; vm_pageout_queue_internal.pgo_laundry = 0; vm_pageout_queue_internal.pgo_idle = FALSE; vm_pageout_queue_internal.pgo_busy = FALSE; vm_pageout_queue_internal.pgo_throttled = FALSE; + vm_pageout_queue_internal.pgo_draining = FALSE; - result = kernel_thread_start_priority((thread_continue_t)vm_pageout_iothread_internal, NULL, BASEPRI_PREEMPT - 1, &thread); - if (result != KERN_SUCCESS) - panic("vm_pageout_iothread_internal: create failed"); - - thread_deallocate(thread); - + /* 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, &thread); + result = kernel_thread_start_priority((thread_continue_t)vm_pageout_iothread_external, NULL, + BASEPRI_PREEMPT - 1, + &vm_pageout_external_iothread); if (result != KERN_SUCCESS) panic("vm_pageout_iothread_external: create failed"); - thread_deallocate(thread); - + thread_deallocate(vm_pageout_external_iothread); - result = kernel_thread_start_priority((thread_continue_t)vm_pageout_garbage_collect, NULL, BASEPRI_PREEMPT - 2, &thread); + result = kernel_thread_start_priority((thread_continue_t)vm_pageout_garbage_collect, NULL, + MINPRI_KERNEL, + &thread); if (result != KERN_SUCCESS) panic("vm_pageout_garbage_collect: create failed"); thread_deallocate(thread); + vm_object_reaper_init(); + vm_pageout_continue(); + + /* + * Unreached code! + * + * The vm_pageout_continue() call above never returns, so the code below is never + * executed. We take advantage of this to declare several DTrace VM related probe + * points that our kernel doesn't have an analog for. These are probe points that + * exist in Solaris and are in the DTrace documentation, so people may have written + * scripts that use them. Declaring the probe points here means their scripts will + * compile and execute which we want for portability of the scripts, but since this + * section of code is never reached, the probe points will simply never fire. Yes, + * this is basically a hack. The problem is the DTrace probe points were chosen with + * Solaris specific VM events in mind, not portability to different VM implementations. + */ + + DTRACE_VM2(execfree, int, 1, (uint64_t *), NULL); + DTRACE_VM2(execpgin, int, 1, (uint64_t *), NULL); + DTRACE_VM2(execpgout, int, 1, (uint64_t *), NULL); + DTRACE_VM2(pgswapin, int, 1, (uint64_t *), NULL); + DTRACE_VM2(pgswapout, int, 1, (uint64_t *), NULL); + DTRACE_VM2(swapin, int, 1, (uint64_t *), NULL); + DTRACE_VM2(swapout, int, 1, (uint64_t *), NULL); /*NOTREACHED*/ } +kern_return_t +vm_pageout_internal_start(void) +{ + kern_return_t result; + + vm_pageout_queue_internal.pgo_maxlaundry = VM_PAGE_LAUNDRY_MAX; + result = kernel_thread_start_priority((thread_continue_t)vm_pageout_iothread_internal, NULL, BASEPRI_PREEMPT - 1, &vm_pageout_internal_iothread); + if (result == KERN_SUCCESS) + thread_deallocate(vm_pageout_internal_iothread); + return result; +} + + +/* + * when marshalling pages into a UPL and subsequently committing + * or aborting them, it is necessary to hold + * the vm_page_queue_lock (a hot global lock) for certain operations + * on the page... however, the majority of the work can be done + * while merely holding the object lock... in fact there are certain + * collections of pages that don't require any work brokered by the + * vm_page_queue_lock... to mitigate the time spent behind the global + * lock, go to a 2 pass algorithm... collect pages up to DELAYED_WORK_LIMIT + * while doing all of the work that doesn't require the vm_page_queue_lock... + * then call dw_do_work to acquire the vm_page_queue_lock and do the + * necessary work for each page... we will grab the busy bit on the page + * if it's not already held so that dw_do_work can drop the object lock + * if it can't immediately take the vm_page_queue_lock in order to compete + * for the locks in the same order that vm_pageout_scan takes them. + * the operation names are modeled after the names of the routines that + * need to be called in order to make the changes very obvious in the + * original loop + */ + +#define DELAYED_WORK_LIMIT 32 + +#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 + +struct dw { + vm_page_t dw_m; + int dw_mask; +}; + + +static void dw_do_work(vm_object_t object, struct dw *dwp, int dw_count); + + static upl_t -upl_create( - int flags, - upl_size_t size) +upl_create(int type, int flags, upl_size_t size) { upl_t upl; - int page_field_size; /* bit field in word size buf */ + int page_field_size = 0; + int upl_flags = 0; + int upl_size = sizeof(struct upl); - page_field_size = 0; - if (flags & UPL_CREATE_LITE) { - page_field_size = ((size/PAGE_SIZE) + 7) >> 3; + size = round_page_32(size); + + if (type & UPL_CREATE_LITE) { + page_field_size = (atop(size) + 7) >> 3; page_field_size = (page_field_size + 3) & 0xFFFFFFFC; + + upl_flags |= UPL_LITE; } - if(flags & UPL_CREATE_INTERNAL) { - upl = (upl_t)kalloc(sizeof(struct upl) - + (sizeof(struct upl_page_info)*(size/PAGE_SIZE)) - + page_field_size); - } else { - upl = (upl_t)kalloc(sizeof(struct upl) + page_field_size); + if (type & UPL_CREATE_INTERNAL) { + upl_size += (int) sizeof(struct upl_page_info) * atop(size); + + upl_flags |= UPL_INTERNAL; } - upl->flags = 0; + upl = (upl_t)kalloc(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->map_object = NULL; upl->ref_count = 1; + upl->highest_page = 0; upl_lock_init(upl); -#ifdef UPL_DEBUG + upl->vector_upl = NULL; +#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)); + + (void) OSBacktrace(&upl->upl_create_retaddr[0], UPL_DEBUG_STACK_FRAMES); #endif /* UPL_DEBUG */ + return(upl); } static void -upl_destroy( - upl_t upl) +upl_destroy(upl_t upl) { int page_field_size; /* bit field in word size buf */ + int size; -#ifdef UPL_DEBUG +#if UPL_DEBUG { - upl_t upl_ele; vm_object_t object; - if (upl->map_object->pageout) { + + if (upl->flags & UPL_SHADOWED) { object = upl->map_object->shadow; } else { object = upl->map_object; } vm_object_lock(object); - queue_iterate(&object->uplq, upl_ele, upl_t, uplq) { - if(upl_ele == upl) { - queue_remove(&object->uplq, - upl_ele, upl_t, uplq); - break; - } - } + queue_remove(&object->uplq, upl, upl_t, uplq); vm_object_unlock(object); } #endif /* UPL_DEBUG */ - /* drop a reference on the map_object whether or */ - /* not a pageout object is inserted */ - if(upl->map_object->pageout) + /* + * drop a reference on the map_object whether or + * not a pageout object is inserted + */ + if (upl->flags & UPL_SHADOWED) vm_object_deallocate(upl->map_object); + if (upl->flags & UPL_DEVICE_MEMORY) + size = PAGE_SIZE; + else + size = upl->size; page_field_size = 0; + if (upl->flags & UPL_LITE) { - page_field_size = ((upl->size/PAGE_SIZE) + 7) >> 3; + page_field_size = ((size/PAGE_SIZE) + 7) >> 3; page_field_size = (page_field_size + 3) & 0xFFFFFFFC; } - if(upl->flags & UPL_INTERNAL) { + upl_lock_destroy(upl); + upl->vector_upl = (vector_upl_t) 0xfeedbeef; + if (upl->flags & UPL_INTERNAL) { kfree(upl, sizeof(struct upl) + - (sizeof(struct upl_page_info) * (upl->size/PAGE_SIZE)) + (sizeof(struct upl_page_info) * (size/PAGE_SIZE)) + page_field_size); } else { kfree(upl, sizeof(struct upl) + page_field_size); @@ -2269,35 +2866,34 @@ upl_destroy( void uc_upl_dealloc(upl_t upl); __private_extern__ void -uc_upl_dealloc( - upl_t upl) +uc_upl_dealloc(upl_t upl) { - upl->ref_count -= 1; - if(upl->ref_count == 0) { + if (--upl->ref_count == 0) upl_destroy(upl); - } } void -upl_deallocate( - upl_t upl) +upl_deallocate(upl_t upl) { - - upl->ref_count -= 1; - if(upl->ref_count == 0) { + if (--upl->ref_count == 0) { + if(vector_upl_is_valid(upl)) + vector_upl_deallocate(upl); upl_destroy(upl); } } -/* +#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_contiguous = 0; unsigned long upl_cow_pages = 0; unsigned long upl_cow_again_pages = 0; -unsigned long upl_cow_contiguous_pages = 0; + +unsigned long iopl_cow = 0; +unsigned long iopl_cow_pages = 0; +#endif /* * Routine: vm_object_upl_request @@ -2354,9 +2950,8 @@ vm_object_upl_request( int cntrl_flags) { vm_page_t dst_page = VM_PAGE_NULL; - vm_object_offset_t dst_offset = offset; - upl_size_t xfer_size = size; - boolean_t do_m_lock = FALSE; + vm_object_offset_t dst_offset; + upl_size_t xfer_size; boolean_t dirty; boolean_t hw_dirty; upl_t upl = NULL; @@ -2365,11 +2960,12 @@ vm_object_upl_request( boolean_t encountered_lrp = FALSE; #endif vm_page_t alias_page = NULL; - int page_ticket; - int refmod_state; + int refmod_state = 0; wpl_array_t lite_list = NULL; vm_object_t last_copy_object; - + struct dw dw_array[DELAYED_WORK_LIMIT]; + struct dw *dwp; + int dw_count; if (cntrl_flags & ~UPL_VALID_FLAGS) { /* @@ -2378,164 +2974,76 @@ vm_object_upl_request( */ return KERN_INVALID_VALUE; } + 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"); - page_ticket = (cntrl_flags & UPL_PAGE_TICKET_MASK) - >> UPL_PAGE_TICKET_SHIFT; - - if(((size/PAGE_SIZE) > MAX_UPL_TRANSFER) && !object->phys_contiguous) { - size = MAX_UPL_TRANSFER * PAGE_SIZE; - } - if(cntrl_flags & UPL_SET_INTERNAL) - if(page_list_count != NULL) - *page_list_count = MAX_UPL_TRANSFER; + if ((size / PAGE_SIZE) > MAX_UPL_SIZE) + size = MAX_UPL_SIZE * PAGE_SIZE; - if((!object->internal) && (object->paging_offset != 0)) - panic("vm_object_upl_request: vnode object with non-zero paging offset\n"); + if ( (cntrl_flags & UPL_SET_INTERNAL) && page_list_count != NULL) + *page_list_count = MAX_UPL_SIZE; - if((cntrl_flags & UPL_COPYOUT_FROM) && (upl_ptr == NULL)) { - return KERN_SUCCESS; - } + if (cntrl_flags & UPL_SET_INTERNAL) { + if (cntrl_flags & UPL_SET_LITE) { - vm_object_lock(object); - vm_object_paging_begin(object); - vm_object_unlock(object); + upl = upl_create(UPL_CREATE_INTERNAL | UPL_CREATE_LITE, 0, size); - if(upl_ptr) { - if(cntrl_flags & UPL_SET_INTERNAL) { - if(cntrl_flags & UPL_SET_LITE) { - uintptr_t page_field_size; - upl = upl_create( - UPL_CREATE_INTERNAL | UPL_CREATE_LITE, - size); - user_page_list = (upl_page_info_t *) - (((uintptr_t)upl) + sizeof(struct upl)); - lite_list = (wpl_array_t) + 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))); - page_field_size = ((size/PAGE_SIZE) + 7) >> 3; - page_field_size = - (page_field_size + 3) & 0xFFFFFFFC; - bzero((char *)lite_list, page_field_size); - upl->flags = - UPL_LITE | UPL_INTERNAL; - } else { - upl = upl_create(UPL_CREATE_INTERNAL, size); - user_page_list = (upl_page_info_t *) - (((uintptr_t)upl) + sizeof(struct upl)); - upl->flags = UPL_INTERNAL; + ((size/PAGE_SIZE) * sizeof(upl_page_info_t))); + if (size == 0) { + user_page_list = NULL; + lite_list = NULL; } } else { - if(cntrl_flags & UPL_SET_LITE) { - uintptr_t page_field_size; - upl = upl_create(UPL_CREATE_LITE, size); - lite_list = (wpl_array_t) - (((uintptr_t)upl) + sizeof(struct upl)); - page_field_size = ((size/PAGE_SIZE) + 7) >> 3; - page_field_size = - (page_field_size + 3) & 0xFFFFFFFC; - bzero((char *)lite_list, page_field_size); - upl->flags = UPL_LITE; - } else { - upl = upl_create(UPL_CREATE_EXTERNAL, size); - upl->flags = 0; - } - } - - if (object->phys_contiguous) { - if ((cntrl_flags & UPL_WILL_MODIFY) && - object->copy != VM_OBJECT_NULL) { - /* Honor copy-on-write obligations */ - - /* - * XXX FBDP - * We could still have a race... - * A is here building the UPL for a write(). - * A pushes the pages to the current copy - * object. - * A returns the UPL to the caller. - * B comes along and establishes another - * private mapping on this object, inserting - * a new copy object between the original - * object and the old copy object. - * B reads a page and gets the original contents - * from the original object. - * A modifies the page in the original object. - * B reads the page again and sees A's changes, - * which is wrong... - * - * The problem is that the pages are not - * marked "busy" in the original object, so - * nothing prevents B from reading it before - * before A's changes are completed. - * - * The "paging_in_progress" might protect us - * from the insertion of a new copy object - * though... To be verified. - */ - vm_object_lock_request(object, - offset, - size, - FALSE, - MEMORY_OBJECT_COPY_SYNC, - VM_PROT_NO_CHANGE); - upl_cow_contiguous++; - upl_cow_contiguous_pages += size >> PAGE_SHIFT; - } - - upl->map_object = object; - /* don't need any shadow mappings for this one */ - /* since it is already I/O memory */ - upl->flags |= UPL_DEVICE_MEMORY; + upl = upl_create(UPL_CREATE_INTERNAL, 0, size); - - /* paging_in_progress protects paging_offset */ - upl->offset = offset + object->paging_offset; - upl->size = size; - *upl_ptr = upl; - if(user_page_list) { - user_page_list[0].phys_addr = - (offset + object->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; - } + user_page_list = (upl_page_info_t *) (((uintptr_t)upl) + sizeof(struct upl)); + if (size == 0) { + user_page_list = NULL; } - - return KERN_SUCCESS; } + } else { + if (cntrl_flags & UPL_SET_LITE) { - if(user_page_list) - user_page_list[0].device = FALSE; + upl = upl_create(UPL_CREATE_EXTERNAL | UPL_CREATE_LITE, 0, size); - if(cntrl_flags & UPL_SET_LITE) { - upl->map_object = object; + lite_list = (wpl_array_t) (((uintptr_t)upl) + sizeof(struct upl)); + if (size == 0) { + lite_list = NULL; + } } else { - 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->shadow = object; - upl->map_object->pageout = TRUE; - upl->map_object->can_persist = FALSE; - upl->map_object->copy_strategy = - MEMORY_OBJECT_COPY_NONE; - upl->map_object->shadow_offset = offset; - upl->map_object->wimg_bits = object->wimg_bits; + upl = upl_create(UPL_CREATE_EXTERNAL, 0, size); } - } - if (!(cntrl_flags & UPL_SET_LITE)) { + *upl_ptr = upl; + + if (user_page_list) + user_page_list[0].device = FALSE; + + if (cntrl_flags & UPL_SET_LITE) { + upl->map_object = object; + } else { + 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->shadow = object; + upl->map_object->pageout = TRUE; + upl->map_object->can_persist = FALSE; + upl->map_object->copy_strategy = MEMORY_OBJECT_COPY_NONE; + upl->map_object->shadow_offset = offset; + upl->map_object->wimg_bits = object->wimg_bits; + VM_PAGE_GRAB_FICTITIOUS(alias_page); - } + upl->flags |= UPL_SHADOWED; + } /* * ENCRYPTED SWAP: * Just mark the UPL as "encrypted" here. @@ -2543,29 +3051,29 @@ vm_object_upl_request( * in upl_encrypt(), when the caller has * selected which pages need to go to swap. */ - if (cntrl_flags & UPL_ENCRYPT) { + 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); - /* we can lock in the paging_offset once paging_in_progress is set */ - if(upl_ptr) { - upl->size = size; - upl->offset = offset + object->paging_offset; - *upl_ptr = upl; -#ifdef UPL_DEBUG - queue_enter(&object->uplq, upl, upl_t, uplq); -#endif /* UPL_DEBUG */ - } + /* + * we can lock in the paging_offset once paging_in_progress is set + */ + upl->size = size; + upl->offset = offset + object->paging_offset; - if ((cntrl_flags & UPL_WILL_MODIFY) && - object->copy != VM_OBJECT_NULL) { - /* Honor copy-on-write obligations */ +#if UPL_DEBUG + queue_enter(&object->uplq, upl, upl_t, uplq); +#endif /* UPL_DEBUG */ + if ((cntrl_flags & UPL_WILL_MODIFY) && object->copy != VM_OBJECT_NULL) { /* + * Honor copy-on-write obligations + * * The caller is gathering these pages and * might modify their contents. We need to * make sure that the copy object has its own @@ -2580,291 +3088,287 @@ vm_object_upl_request( FALSE, /* should_return */ MEMORY_OBJECT_COPY_SYNC, VM_PROT_NO_CHANGE); +#if DEVELOPMENT || DEBUG upl_cow++; upl_cow_pages += size >> PAGE_SHIFT; - +#endif } - /* remember which copy object we synchronized with */ + /* + * remember which copy object we synchronized with + */ last_copy_object = object->copy; - entry = 0; - if(cntrl_flags & UPL_COPYOUT_FROM) { - upl->flags |= UPL_PAGE_SYNC_DONE; - while (xfer_size) { - if((alias_page == NULL) && - !(cntrl_flags & UPL_SET_LITE)) { - vm_object_unlock(object); - VM_PAGE_GRAB_FICTITIOUS(alias_page); - vm_object_lock(object); - } + xfer_size = size; + dst_offset = offset; + + dwp = &dw_array[0]; + dw_count = 0; + + while (xfer_size) { + + dwp->dw_mask = 0; + + if ((alias_page == NULL) && !(cntrl_flags & UPL_SET_LITE)) { + vm_object_unlock(object); + VM_PAGE_GRAB_FICTITIOUS(alias_page); + 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->wire_count && !dst_page->pageout) || - - ((!dst_page->inactive) && (cntrl_flags & UPL_FOR_PAGEOUT) && - (dst_page->page_ticket != page_ticket) && - ((dst_page->page_ticket+1) != page_ticket)) ) { + (VM_PAGE_WIRED(dst_page) && !dst_page->pageout && !dst_page->list_req_pending)) { if (user_page_list) user_page_list[entry].phys_addr = 0; - } else { + + goto try_next_page; + } + /* + * grab this up front... + * a high percentange of the time we're going to + * need the hardware modification state a bit later + * 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 ( (refmod_state & VM_MEM_REFERENCED) && dst_page->inactive ) { /* - * grab this up front... - * a high percentange of the time we're going to - * need the hardware modification state a bit later - * anyway... so we can eliminate an extra call into - * the pmap layer by grabbing it here and recording it + * 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 + * reactivate it upon tripping over it */ - refmod_state = pmap_get_refmod(dst_page->phys_page); - - if (cntrl_flags & UPL_RET_ONLY_DIRTY) { + 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->list_req_pending || !(cntrl_flags & UPL_FOR_PAGEOUT)) { /* - * we're only asking for DIRTY pages to be returned - */ - - if (dst_page->list_req_pending || !(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 - * or this request is not being driven by a PAGEOUT cluster - * then we only need to check for the page being diry or - * precious to decide whether to return it - */ - if (dst_page->dirty || dst_page->precious || - (refmod_state & VM_MEM_MODIFIED)) { - goto check_busy; - } - } - /* - * this is a request for a PAGEOUT cluster and this page - * is merely along for the ride as a 'buddy'... not only - * does it have to be dirty to be returned, but it also - * can't have been referenced recently... note that we've - * already filtered above based on whether this page is - * currently on the inactive queue or it meets the page - * ticket (generation count) check + * if we were the page stolen by vm_pageout_scan to be + * 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 ( !(refmod_state & VM_MEM_REFERENCED) && - ((refmod_state & VM_MEM_MODIFIED) || - dst_page->dirty || dst_page->precious) ) { + if (dst_page->dirty || dst_page->precious || (refmod_state & VM_MEM_MODIFIED)) goto check_busy; - } - /* - * if we reach here, we're not to return - * the page... go on to the next one - */ - if (user_page_list) - user_page_list[entry].phys_addr = 0; - entry++; - dst_offset += PAGE_SIZE_64; - xfer_size -= PAGE_SIZE; - continue; - } -check_busy: - if(dst_page->busy && - (!(dst_page->list_req_pending && - dst_page->pageout))) { - if(cntrl_flags & UPL_NOBLOCK) { - if(user_page_list) { - user_page_list[entry].phys_addr = 0; - } - entry++; - dst_offset += PAGE_SIZE_64; - xfer_size -= PAGE_SIZE; - continue; - } - /* - * someone else is playing with the - * page. We will have to wait. - */ - PAGE_SLEEP(object, dst_page, THREAD_UNINT); - continue; + goto dont_return; } - /* Someone else already cleaning the page? */ - if((dst_page->cleaning || dst_page->absent || - dst_page->wire_count != 0) && - !dst_page->list_req_pending) { - if(user_page_list) { - user_page_list[entry].phys_addr = 0; - } - entry++; - dst_offset += PAGE_SIZE_64; - xfer_size -= PAGE_SIZE; - continue; + /* + * this is a request for a PAGEOUT cluster and this page + * is merely along for the ride as a 'buddy'... not only + * does it have to be dirty to be returned, but it also + * can't have been referenced recently... note that we've + * already filtered above based on whether this page is + * currently on the inactive queue or it meets the page + * ticket (generation count) check + */ + if ( (cntrl_flags & UPL_CLEAN_IN_PLACE || !(refmod_state & VM_MEM_REFERENCED)) && + ((refmod_state & VM_MEM_MODIFIED) || dst_page->dirty || dst_page->precious) ) { + goto check_busy; } - /* eliminate all mappings from the */ - /* original object and its prodigy */ - - vm_page_lock_queues(); +dont_return: + /* + * if we reach here, we're not to return + * the page... go on to the next one + */ + if (user_page_list) + user_page_list[entry].phys_addr = 0; + + goto try_next_page; + } +check_busy: + if (dst_page->busy && (!(dst_page->list_req_pending && (dst_page->pageout || dst_page->cleaning)))) { + if (cntrl_flags & UPL_NOBLOCK) { + if (user_page_list) + user_page_list[entry].phys_addr = 0; + + goto try_next_page; + } + /* + * someone else is playing with the + * page. We will have to wait. + */ + PAGE_SLEEP(object, dst_page, THREAD_UNINT); + + continue; + } + /* + * Someone else already cleaning the page? + */ + if ((dst_page->cleaning || dst_page->absent || VM_PAGE_WIRED(dst_page)) && !dst_page->list_req_pending) { + if (user_page_list) + user_page_list[entry].phys_addr = 0; + + goto try_next_page; + } + /* + * 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) { + vm_page_lockspin_queues(); + +#if CONFIG_EMBEDDED + if (dst_page->laundry) +#else if (dst_page->pageout_queue == TRUE) - /* +#endif + { + /* * we've buddied up a page for a clustered pageout * that has already been moved to the pageout * queue by pageout_scan... we need to remove * it from the queue and drop the laundry count * on that queue */ - vm_pageout_queue_steal(dst_page); -#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->list_req_pending) - encountered_lrp = TRUE; - if((dst_page->dirty || - (dst_page->object->internal && - dst_page->precious)) && - (dst_page->list_req_pending - == FALSE)) { - if(encountered_lrp) { - CLUSTER_STAT - (pages_at_higher_offsets++;) - } else { - CLUSTER_STAT - (pages_at_lower_offsets++;) - } + vm_pageout_throttle_up(dst_page); } + 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->list_req_pending) + encountered_lrp = TRUE; + if ((dst_page->dirty || (dst_page->object->internal && dst_page->precious)) && !dst_page->list_req_pending) { + if (encountered_lrp) + CLUSTER_STAT(pages_at_higher_offsets++;) + else + CLUSTER_STAT(pages_at_lower_offsets++;) + } #endif - /* Turn off busy indication on pending */ - /* pageout. Note: we can only get here */ - /* in the request pending case. */ - dst_page->list_req_pending = FALSE; - dst_page->busy = FALSE; - dst_page->cleaning = FALSE; - - hw_dirty = refmod_state & VM_MEM_MODIFIED; - dirty = hw_dirty ? TRUE : dst_page->dirty; - - if(cntrl_flags & UPL_SET_LITE) { - int pg_num; - pg_num = (dst_offset-offset)/PAGE_SIZE; - lite_list[pg_num>>5] |= - 1 << (pg_num & 31); - if (hw_dirty) - pmap_clear_modify(dst_page->phys_page); - /* - * Record that this page has been - * written out - */ -#if MACH_PAGEMAP - vm_external_state_set( - object->existence_map, - dst_page->offset); -#endif /*MACH_PAGEMAP*/ + /* + * Turn off busy indication on pending + * pageout. Note: we can only get here + * in the request pending case. + */ + dst_page->list_req_pending = FALSE; + dst_page->busy = FALSE; - /* - * Mark original page as cleaning - * in place. - */ - dst_page->cleaning = TRUE; - dst_page->dirty = TRUE; - dst_page->precious = FALSE; - } else { - /* use pageclean setup, it is more */ - /* convenient even for the pageout */ - /* cases here */ - - 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 = NULL; - } - - if(!dirty) { - dst_page->dirty = FALSE; - dst_page->precious = TRUE; - } + hw_dirty = refmod_state & VM_MEM_MODIFIED; + dirty = hw_dirty ? TRUE : dst_page->dirty; - if(dst_page->pageout) - dst_page->busy = TRUE; + if (dst_page->phys_page > upl->highest_page) + upl->highest_page = dst_page->phys_page; - 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. - */ - dst_page->busy = TRUE; - } - if ( !(cntrl_flags & UPL_CLEAN_IN_PLACE) ) { - /* - * deny access to the target page - * while it is being worked on - */ - if ((!dst_page->pageout) && - (dst_page->wire_count == 0)) { - dst_page->busy = TRUE; - dst_page->pageout = TRUE; - vm_page_wire(dst_page); - } - } + if (cntrl_flags & UPL_SET_LITE) { + unsigned int pg_num; - if(user_page_list) { - user_page_list[entry].phys_addr - = dst_page->phys_page; - user_page_list[entry].dirty = - dst_page->dirty; - user_page_list[entry].pageout = - dst_page->pageout; - user_page_list[entry].absent = - dst_page->absent; - user_page_list[entry].precious = - dst_page->precious; - } - vm_page_unlock_queues(); + 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); + + if (hw_dirty) + pmap_clear_modify(dst_page->phys_page); /* - * 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. + * Mark original page as cleaning + * in place. */ - if (! (cntrl_flags & UPL_ENCRYPT) && - dst_page->encrypted) { - assert(dst_page->busy); - - vm_page_decrypt(dst_page, 0); - vm_page_decrypt_for_upl_counter++; + dst_page->cleaning = TRUE; + dst_page->precious = FALSE; + } else { + /* + * use pageclean setup, it is more + * convenient even for the pageout + * cases here + */ + 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); - /* - * Retry this page, since anything - * could have changed while we were - * decrypting. - */ - continue; - } - } - entry++; - dst_offset += PAGE_SIZE_64; - xfer_size -= PAGE_SIZE; - } - } else { - while (xfer_size) { - if((alias_page == NULL) && - !(cntrl_flags & UPL_SET_LITE)) { - vm_object_unlock(object); - VM_PAGE_GRAB_FICTITIOUS(alias_page); - vm_object_lock(object); + alias_page->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*/ + dst_page->dirty = dirty; + + if (!dirty) + dst_page->precious = TRUE; - if ((cntrl_flags & UPL_WILL_MODIFY) && - object->copy != last_copy_object) { - /* Honor copy-on-write obligations */ + if (dst_page->pageout) + dst_page->busy = 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; + } + if ( !(cntrl_flags & UPL_CLEAN_IN_PLACE) ) { + /* + * deny access to the target page + * while it is being worked on + */ + if ((!dst_page->pageout) && ( !VM_PAGE_WIRED(dst_page))) { + dst_page->busy = TRUE; + dst_page->pageout = TRUE; + dwp->dw_mask |= DW_vm_page_wire; + } + } + } else { + if ((cntrl_flags & UPL_WILL_MODIFY) && object->copy != last_copy_object) { /* + * Honor copy-on-write obligations + * * The copy object has changed since we * last synchronized for copy-on-write. * Another copy object might have been @@ -2893,113 +3397,159 @@ check_busy: 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; + upl_cow_again_pages += xfer_size >> PAGE_SHIFT; +#endif } - /* remember the copy object we synced with */ + /* + * 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((cntrl_flags & UPL_RET_ONLY_ABSENT) && - !((dst_page->list_req_pending) - && (dst_page->absent))) { - /* we are doing extended range */ - /* requests. we want to grab */ - /* pages around some which are */ - /* already present. */ - if(user_page_list) { - user_page_list[entry].phys_addr = 0; + if (dst_page != VM_PAGE_NULL) { + + if ((cntrl_flags & UPL_RET_ONLY_ABSENT)) { + + if ( !(dst_page->absent && dst_page->list_req_pending) ) { + /* + * skip over pages already present in the cache + */ + if (user_page_list) + user_page_list[entry].phys_addr = 0; + + goto try_next_page; } - entry++; - dst_offset += PAGE_SIZE_64; - xfer_size -= PAGE_SIZE; - continue; } - if((dst_page->cleaning) && - !(dst_page->list_req_pending)) { - /*someone else is writing to the */ - /* page. We will have to wait. */ - PAGE_SLEEP(object,dst_page,THREAD_UNINT); - continue; - } - if ((dst_page->fictitious && - dst_page->list_req_pending)) { - /* dump the fictitious page */ - dst_page->list_req_pending = FALSE; - dst_page->clustered = FALSE; + if ( !(dst_page->list_req_pending) ) { - vm_page_lock_queues(); - vm_page_free(dst_page); - vm_page_unlock_queues(); + if (dst_page->cleaning) { + /* + * someone else is writing to the page... wait... + */ + PAGE_SLEEP(object, dst_page, THREAD_UNINT); + + continue; + } + } else { + if (dst_page->fictitious && + dst_page->phys_page == vm_page_fictitious_addr) { + assert( !dst_page->speculative); + /* + * dump the fictitious page + */ + dst_page->list_req_pending = FALSE; - dst_page = NULL; - } else if ((dst_page->absent && - dst_page->list_req_pending)) { - /* the default_pager case */ - dst_page->list_req_pending = FALSE; - dst_page->busy = FALSE; + VM_PAGE_FREE(dst_page); + + dst_page = NULL; + + } else if (dst_page->absent) { + /* + * the default_pager case + */ + dst_page->list_req_pending = FALSE; + dst_page->busy = FALSE; + + } else if (dst_page->pageout || dst_page->cleaning) { + /* + * page was earmarked by vm_pageout_scan + * to be cleaned and stolen... we're going + * to take it back since we are not attempting + * to read that page and we don't want to stall + * waiting for it to be cleaned for 2 reasons... + * 1 - no use paging it out and back in + * 2 - if we stall, we may casue a deadlock in + * the FS trying to acquire the its locks + * on the VNOP_PAGEOUT path presuming that + * those locks are already held on the read + * path before trying to create this UPL + * + * so undo all of the state that vm_pageout_scan + * hung on this page + */ + dst_page->busy = FALSE; + + vm_pageout_queue_steal(dst_page, FALSE); + } } } - if(dst_page == VM_PAGE_NULL) { - if(object->private) { + if (dst_page == VM_PAGE_NULL) { + if (object->private) { /* * This is a nasty wrinkle for users * of upl who encounter device or * private memory however, it is * unavoidable, only a fault can - * reslove the actual backing + * 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; - } - entry++; - dst_offset += PAGE_SIZE_64; - xfer_size -= PAGE_SIZE; - continue; + + goto try_next_page; } - /* need to allocate a page */ - dst_page = vm_page_alloc(object, dst_offset); + /* + * need to allocate a page + */ + dst_page = vm_page_grab(); + 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; + + goto try_next_page; + } + /* + * no pages available... wait + * then try again for the same + * offset... + */ vm_object_unlock(object); VM_PAGE_WAIT(); vm_object_lock(object); + continue; } + vm_page_insert(dst_page, object, dst_offset); + + dst_page->absent = TRUE; dst_page->busy = FALSE; -#if 0 - if(cntrl_flags & UPL_NO_SYNC) { - dst_page->page_lock = 0; - dst_page->unlock_request = 0; - } -#endif - if(cntrl_flags & UPL_RET_ONLY_ABSENT) { + + 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 * operation... mark the pages as clustered - * so vm_fault can correctly attribute them - * to the 'pagein' bucket the first time - * a fault happens on them + * so upl_commit_range can put them on the + * speculative list */ dst_page->clustered = TRUE; } - dst_page->absent = TRUE; - object->absent_count++; } -#if 1 - if(cntrl_flags & UPL_NO_SYNC) { - dst_page->page_lock = 0; - dst_page->unlock_request = 0; + if (dst_page->fictitious) { + panic("need corner case for fictitious page"); } -#endif /* 1 */ + if (dst_page->busy) { + /* + * someone else is playing with the + * page. We will have to wait. + */ + PAGE_SLEEP(object, dst_page, THREAD_UNINT); + continue; + } /* * ENCRYPTED SWAP: */ @@ -3016,198 +3566,172 @@ check_busy: */ dst_page->encrypted = FALSE; } - dst_page->overwriting = TRUE; - if(dst_page->fictitious) { - panic("need corner case for fictitious page"); - } - if(dst_page->page_lock) { - do_m_lock = TRUE; - } - if(upl_ptr) { - - /* eliminate all mappings from the */ - /* original object and its prodigy */ - - if(dst_page->busy) { - /*someone else is playing with the */ - /* page. We will have to wait. */ - PAGE_SLEEP(object, dst_page, THREAD_UNINT); - continue; - } - vm_page_lock_queues(); - if( !(cntrl_flags & UPL_FILE_IO)) - hw_dirty = pmap_disconnect(dst_page->phys_page) & VM_MEM_MODIFIED; - else - hw_dirty = pmap_get_refmod(dst_page->phys_page) & VM_MEM_MODIFIED; - dirty = hw_dirty ? TRUE : dst_page->dirty; - - if(cntrl_flags & UPL_SET_LITE) { - int pg_num; - pg_num = (dst_offset-offset)/PAGE_SIZE; - lite_list[pg_num>>5] |= - 1 << (pg_num & 31); - if (hw_dirty) - pmap_clear_modify(dst_page->phys_page); - /* - * Record that this page has been - * written out + if (dst_page->pmapped) { + if ( !(cntrl_flags & UPL_FILE_IO)) + /* + * eliminate all mappings from the + * original object and its prodigy */ -#if MACH_PAGEMAP - vm_external_state_set( - object->existence_map, - dst_page->offset); -#endif /*MACH_PAGEMAP*/ + refmod_state = pmap_disconnect(dst_page->phys_page); + else + refmod_state = pmap_get_refmod(dst_page->phys_page); + } else + refmod_state = 0; - /* - * Mark original page as cleaning - * in place. - */ - dst_page->cleaning = TRUE; - dst_page->dirty = TRUE; - dst_page->precious = FALSE; - } else { - /* use pageclean setup, it is more */ - /* convenient even for the pageout */ - /* cases here */ - 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 = NULL; - } + hw_dirty = refmod_state & VM_MEM_MODIFIED; + dirty = hw_dirty ? TRUE : dst_page->dirty; - if(cntrl_flags & UPL_CLEAN_IN_PLACE) { - /* clean in place for read implies */ - /* that a write will be done on all */ - /* the pages that are dirty before */ - /* a upl commit is done. The caller */ - /* is obligated to preserve the */ - /* contents of all pages marked */ - /* dirty. */ - upl->flags |= UPL_CLEAR_DIRTY; - } + if (cntrl_flags & UPL_SET_LITE) { + unsigned int pg_num; - if(!dirty) { - dst_page->dirty = FALSE; - dst_page->precious = TRUE; - } - - if (dst_page->wire_count == 0) { - /* deny access to the target page while */ - /* it is being worked on */ - dst_page->busy = TRUE; - } else { - vm_page_wire(dst_page); - } - if(cntrl_flags & UPL_RET_ONLY_ABSENT) { - /* - * expect the page not to be used - * since it's coming in as part - * of a cluster and could be - * speculative... pages that - * are 'consumed' will get a - * hardware reference - */ - dst_page->reference = FALSE; - } else { - /* - * expect the page to be used - */ - dst_page->reference = TRUE; - } - dst_page->precious = - (cntrl_flags & UPL_PRECIOUS) - ? TRUE : FALSE; - if(user_page_list) { - user_page_list[entry].phys_addr - = dst_page->phys_page; - user_page_list[entry].dirty = - dst_page->dirty; - user_page_list[entry].pageout = - dst_page->pageout; - user_page_list[entry].absent = - dst_page->absent; - user_page_list[entry].precious = - dst_page->precious; - } - vm_page_unlock_queues(); + 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); + + if (hw_dirty) + pmap_clear_modify(dst_page->phys_page); + + /* + * Mark original page as cleaning + * in place. + */ + dst_page->cleaning = TRUE; + dst_page->precious = FALSE; + } else { + /* + * use pageclean setup, it is more + * convenient even for the pageout + * cases here + */ + 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 = NULL; } - entry++; - dst_offset += PAGE_SIZE_64; - xfer_size -= PAGE_SIZE; - } - } - if (upl->flags & UPL_INTERNAL) { - if(page_list_count != NULL) - *page_list_count = 0; - } else if (*page_list_count > entry) { - if(page_list_count != NULL) - *page_list_count = entry; - } + if (cntrl_flags & UPL_CLEAN_IN_PLACE) { + /* + * clean in place for read implies + * that a write will be done on all + * the pages that are dirty before + * a upl commit is done. The caller + * is obligated to preserve the + * contents of all pages marked dirty + */ + upl->flags |= UPL_CLEAR_DIRTY; + } + dst_page->dirty = dirty; - if(alias_page != NULL) { - vm_page_lock_queues(); - vm_page_free(alias_page); - vm_page_unlock_queues(); - } + if (!dirty) + dst_page->precious = TRUE; - if(do_m_lock) { - vm_prot_t access_required; - /* call back all associated pages from other users of the pager */ - /* all future updates will be on data which is based on the */ - /* changes we are going to make here. Note: it is assumed that */ - /* we already hold copies of the data so we will not be seeing */ - /* an avalanche of incoming data from the pager */ - access_required = (cntrl_flags & UPL_COPYOUT_FROM) - ? VM_PROT_READ : VM_PROT_WRITE; - while (TRUE) { - kern_return_t rc; - - if(!object->pager_ready) { - wait_result_t wait_result; - - wait_result = vm_object_sleep(object, - VM_OBJECT_EVENT_PAGER_READY, - THREAD_UNINT); - if (wait_result != THREAD_AWAKENED) { - vm_object_unlock(object); - return KERN_FAILURE; - } - continue; + if ( !VM_PAGE_WIRED(dst_page)) { + /* + * deny access to the target page while + * it is being worked on + */ + dst_page->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)) { + /* + * expect the page to be used + */ + dwp->dw_mask |= DW_set_reference; + } + dst_page->precious = (cntrl_flags & UPL_PRECIOUS) ? TRUE : FALSE; + } + if (dst_page->busy) + upl->flags |= UPL_HAS_BUSY; + + if (dst_page->phys_page > upl->highest_page) + upl->highest_page = dst_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; + 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 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)) { + /* + * someone is explicitly grabbing this page... + * update clustered and speculative state + * + */ + VM_PAGE_CONSUME_CLUSTERED(dst_page); } +try_next_page: + if (dwp->dw_mask) { + if (dwp->dw_mask & DW_vm_page_activate) + VM_STAT_INCR(reactivations); - vm_object_unlock(object); - rc = memory_object_data_unlock( - object->pager, - dst_offset + object->paging_offset, - size, - access_required); - if (rc != KERN_SUCCESS && rc != MACH_SEND_INTERRUPTED) - return KERN_FAILURE; - vm_object_lock(object); + if (dst_page->busy == FALSE) { + /* + * dw_do_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. + */ + dst_page->busy = TRUE; + dwp->dw_mask |= (DW_clear_busy | DW_PAGE_WAKEUP); + } + dwp->dw_m = dst_page; + dwp++; + dw_count++; - if (rc == KERN_SUCCESS) - break; - } - - /* lets wait on the last page requested */ - /* NOTE: we will have to update lock completed routine to signal */ - if(dst_page != VM_PAGE_NULL && - (access_required & dst_page->page_lock) != access_required) { - PAGE_ASSERT_WAIT(dst_page, THREAD_UNINT); - vm_object_unlock(object); - thread_block(THREAD_CONTINUE_NULL); - return KERN_SUCCESS; - } + if (dw_count >= DELAYED_WORK_LIMIT) { + dw_do_work(object, &dw_array[0], dw_count); + + dwp = &dw_array[0]; + dw_count = 0; + } + } + entry++; + dst_offset += PAGE_SIZE_64; + xfer_size -= PAGE_SIZE; + } + if (dw_count) + dw_do_work(object, &dw_array[0], dw_count); + + if (alias_page != NULL) { + VM_PAGE_FREE(alias_page); } + if (page_list_count != NULL) { + if (upl->flags & UPL_INTERNAL) + *page_list_count = 0; + 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; } @@ -3219,7 +3743,7 @@ vm_fault_list_request( /* forward */ upl_size_t size, upl_t *upl_ptr, upl_page_info_t **user_page_list_ptr, - int page_list_count, + unsigned int page_list_count, int cntrl_flags); kern_return_t vm_fault_list_request( @@ -3228,13 +3752,16 @@ vm_fault_list_request( upl_size_t size, upl_t *upl_ptr, upl_page_info_t **user_page_list_ptr, - int page_list_count, + unsigned int page_list_count, int cntrl_flags) { - int local_list_count; + 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; @@ -3284,64 +3811,48 @@ vm_object_super_upl_request( unsigned int *page_list_count, int cntrl_flags) { - vm_page_t target_page; - int ticket; - - - if(object->paging_offset > offset) + 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(cntrl_flags & UPL_FOR_PAGEOUT) { - - vm_object_lock(object); - - if((target_page = vm_page_lookup(object, offset)) - != VM_PAGE_NULL) { - ticket = target_page->page_ticket; - cntrl_flags = cntrl_flags & ~(int)UPL_PAGE_TICKET_MASK; - cntrl_flags = cntrl_flags | - ((ticket << UPL_PAGE_TICKET_SHIFT) - & UPL_PAGE_TICKET_MASK); - } - vm_object_unlock(object); - } - if (super_cluster > size) { vm_object_offset_t base_offset; upl_size_t super_size; - - 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 = ((base_offset + super_size) > object->size) ? - (object->size - base_offset) : super_size; - 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); + 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_64 = ((base_offset + super_size) > object->size) ? (object->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); + } /* * apparently there is a case where the vm requests a * page to be written out who's offset is beyond the * object size */ - if((offset + size) > (base_offset + super_size)) - super_size = (offset + size) - base_offset; + if ((offset + size) > (base_offset + super_size)) { + 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); } - + kern_return_t vm_map_create_upl( vm_map_t map, @@ -3370,81 +3881,88 @@ vm_map_create_upl( */ return KERN_INVALID_VALUE; } - force_data_sync = (caller_flags & UPL_FORCE_DATA_SYNC); sync_cow_data = !(caller_flags & UPL_COPYOUT_FROM); - if(upl == NULL) + if (upl == NULL) return KERN_INVALID_ARGUMENT; - REDISCOVER_ENTRY: - vm_map_lock(map); + vm_map_lock_read(map); + if (vm_map_lookup_entry(map, offset, &entry)) { - if (entry->object.vm_object == VM_OBJECT_NULL || - !entry->object.vm_object->phys_contiguous) { - if((*upl_size/page_size) > MAX_UPL_TRANSFER) { - *upl_size = MAX_UPL_TRANSFER * page_size; - } - } - if((entry->vme_end - offset) < *upl_size) { - *upl_size = entry->vme_end - offset; + + 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_QUERY_OBJECT_TYPE) { - if (entry->object.vm_object == VM_OBJECT_NULL) { - *flags = 0; - } else if (entry->object.vm_object->private) { - *flags = UPL_DEV_MEMORY; - if (entry->object.vm_object->phys_contiguous) { + *flags = 0; + + if ( !entry->is_sub_map && entry->object.vm_object != VM_OBJECT_NULL) { + if (entry->object.vm_object->private) + *flags = UPL_DEV_MEMORY; + + if (entry->object.vm_object->phys_contiguous) *flags |= UPL_PHYS_CONTIG; - } - } else { - *flags = 0; } - vm_map_unlock(map); + vm_map_unlock_read(map); + return KERN_SUCCESS; } + 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 (entry->object.vm_object == VM_OBJECT_NULL) { - entry->object.vm_object = vm_object_allocate( - (vm_size_t)(entry->vme_end - entry->vme_start)); + + if (vm_map_lock_read_to_write(map)) + goto REDISCOVER_ENTRY; + + entry->object.vm_object = vm_object_allocate((vm_size_t)(entry->vme_end - entry->vme_start)); entry->offset = 0; + + vm_map_lock_write_to_read(map); } if (!(caller_flags & UPL_COPYOUT_FROM)) { if (!(entry->protection & VM_PROT_WRITE)) { - vm_map_unlock(map); + vm_map_unlock_read(map); return KERN_PROTECTION_FAILURE; } if (entry->needs_copy) { + /* + * Honor copy-on-write for COPY_SYMMETRIC + * strategy. + */ vm_map_t local_map; vm_object_t object; - vm_map_offset_t offset_hi; - vm_map_offset_t offset_lo; vm_object_offset_t new_offset; vm_prot_t prot; boolean_t wired; - vm_behavior_t behavior; vm_map_version_t version; vm_map_t real_map; local_map = map; - vm_map_lock_write_to_read(map); - if(vm_map_lookup_locked(&local_map, - offset, VM_PROT_WRITE, - &version, &object, - &new_offset, &prot, &wired, - &behavior, &offset_lo, - &offset_hi, &real_map)) { - vm_map_unlock(local_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) { + if (real_map != map) vm_map_unlock(real_map); - } + vm_map_unlock_read(local_map); + vm_object_unlock(object); - vm_map_unlock(local_map); goto REDISCOVER_ENTRY; } @@ -3455,110 +3973,93 @@ REDISCOVER_ENTRY: submap = entry->object.sub_map; local_start = entry->vme_start; local_offset = entry->offset; - vm_map_reference(submap); - vm_map_unlock(map); - ret = (vm_map_create_upl(submap, - local_offset + (offset - local_start), - upl_size, upl, page_list, count, - flags)); + vm_map_reference(submap); + vm_map_unlock_read(map); + ret = vm_map_create_upl(submap, + local_offset + (offset - local_start), + upl_size, upl, page_list, count, flags); vm_map_deallocate(submap); + return ret; } - if (sync_cow_data) { - if (entry->object.vm_object->shadow - || entry->object.vm_object->copy) { - + 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(map); - - if (entry->object.vm_object->shadow && - entry->object.vm_object->copy) { - vm_object_lock_request( - local_object->shadow, - (vm_object_offset_t) - ((offset - local_start) + - local_offset) + - local_object->shadow_offset, - *upl_size, FALSE, - MEMORY_OBJECT_DATA_SYNC, - VM_PROT_NO_CHANGE); + 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->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; } } - if (force_data_sync) { - local_object = entry->object.vm_object; local_start = entry->vme_start; local_offset = entry->offset; + vm_object_reference(local_object); - vm_map_unlock(map); + vm_map_unlock_read(map); 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); + 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); + goto REDISCOVER_ENTRY; } + if (entry->object.vm_object->private) + *flags = UPL_DEV_MEMORY; + else + *flags = 0; + + if (entry->object.vm_object->phys_contiguous) + *flags |= UPL_PHYS_CONTIG; - if(!(entry->object.vm_object->private)) { - if(*upl_size > (MAX_UPL_TRANSFER*PAGE_SIZE)) - *upl_size = (MAX_UPL_TRANSFER*PAGE_SIZE); - if(entry->object.vm_object->phys_contiguous) { - *flags = UPL_PHYS_CONTIG; - } else { - *flags = 0; - } - } else { - *flags = UPL_DEV_MEMORY | UPL_PHYS_CONTIG; - } local_object = entry->object.vm_object; local_offset = entry->offset; local_start = entry->vme_start; + vm_object_reference(local_object); - vm_map_unlock(map); - if(caller_flags & UPL_SET_IO_WIRE) { - ret = (vm_object_iopl_request(local_object, - (vm_object_offset_t) - ((offset - local_start) - + local_offset), - *upl_size, - upl, - page_list, - count, - caller_flags)); - } else { - ret = (vm_object_upl_request(local_object, - (vm_object_offset_t) - ((offset - local_start) - + local_offset), - *upl_size, - upl, - page_list, - count, - caller_flags)); - } + 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_deallocate(local_object); + return(ret); } + vm_map_unlock_read(map); - vm_map_unlock(map); return(KERN_FAILURE); - } /* @@ -3571,162 +4072,241 @@ kern_return_t vm_map_enter_upl( vm_map_t map, upl_t upl, - vm_map_offset_t *dst_addr) + 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) return KERN_INVALID_ARGUMENT; - upl_lock(upl); + if((isVectorUPL = vector_upl_is_valid(upl))) { + int mapped=0,valid_upls=0; + vector_upl = upl; - /* check to see if already mapped */ - if(UPL_PAGE_LIST_MAPPED & upl->flags) { - upl_unlock(upl); - return KERN_FAILURE; + upl_lock(vector_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) + continue; + valid_upls++; + if (UPL_PAGE_LIST_MAPPED & upl->flags) + mapped++; + } + + 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 { + 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 ) + 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 + upl_lock(upl); + +process_upl_to_enter: + 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) + 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); + } else { + /* + * check to see if already mapped + */ + if (UPL_PAGE_LIST_MAPPED & upl->flags) { + upl_unlock(upl); + return KERN_FAILURE; + } } + if ((!(upl->flags & UPL_SHADOWED)) && + ((upl->flags & UPL_HAS_BUSY) || + !((upl->flags & (UPL_DEVICE_MEMORY | UPL_IO_WIRE)) || (upl->map_object->phys_contiguous)))) { - if((!(upl->map_object->pageout)) && - !((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; - int pg_num; + unsigned int pg_num; wpl_array_t lite_list; - 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))); + + ((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); + vm_object_lock(upl->map_object); + upl->map_object->shadow = object; upl->map_object->pageout = TRUE; upl->map_object->can_persist = FALSE; - upl->map_object->copy_strategy = - MEMORY_OBJECT_COPY_NONE; - upl->map_object->shadow_offset = - upl->offset - object->paging_offset; + upl->map_object->copy_strategy = MEMORY_OBJECT_COPY_NONE; + upl->map_object->shadow_offset = upl->offset - object->paging_offset; upl->map_object->wimg_bits = object->wimg_bits; offset = upl->map_object->shadow_offset; new_offset = 0; size = upl->size; - vm_object_lock(object); + upl->flags |= UPL_SHADOWED; - while(size) { - pg_num = (new_offset)/PAGE_SIZE; - if(lite_list[pg_num>>5] & (1 << (pg_num & 31))) { - vm_object_unlock(object); - 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"); - } + while (size) { + pg_num = (unsigned int) (new_offset / PAGE_SIZE); + assert(pg_num == new_offset / PAGE_SIZE); - vm_object_paging_begin(object); + if (lite_list[pg_num>>5] & (1 << (pg_num & 31))) { - /* - * 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; - alias_page->phys_page = m->phys_page; + VM_PAGE_GRAB_FICTITIOUS(alias_page); - vm_page_lock_queues(); - vm_page_wire(alias_page); - vm_page_unlock_queues(); + vm_object_lock(object); - /* - * 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); + m = vm_page_lookup(object, offset); + if (m == VM_PAGE_NULL) { + panic("vm_upl_map: page missing\n"); + } - vm_page_insert(alias_page, - upl->map_object, new_offset); - assert(!alias_page->wanted); - alias_page->busy = FALSE; - alias_page->absent = FALSE; - } + /* + * 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; + /* + * 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_object_unlock(object); + + vm_page_lockspin_queues(); + vm_page_wire(alias_page); + 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); - size -= PAGE_SIZE; - offset += PAGE_SIZE_64; - new_offset += PAGE_SIZE_64; + vm_page_insert(alias_page, upl->map_object, new_offset); + + assert(!alias_page->wanted); + alias_page->busy = FALSE; + alias_page->absent = FALSE; + } + size -= PAGE_SIZE; + offset += PAGE_SIZE_64; + new_offset += PAGE_SIZE_64; } - vm_object_unlock(object); vm_object_unlock(upl->map_object); } - if ((upl->flags & (UPL_DEVICE_MEMORY | UPL_IO_WIRE)) || upl->map_object->phys_contiguous) - offset = upl->offset - upl->map_object->paging_offset; - else + if (upl->flags & UPL_SHADOWED) offset = 0; - + else + offset = upl->offset - upl->map_object->paging_offset; size = upl->size; - vm_object_lock(upl->map_object); - upl->map_object->ref_count++; - vm_object_res_reference(upl->map_object); - vm_object_unlock(upl->map_object); - - *dst_addr = 0; + vm_object_reference(upl->map_object); + if(!isVectorUPL) { + *dst_addr = 0; + /* + * 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); - /* 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); - - if (kr != KERN_SUCCESS) { - upl_unlock(upl); - return(kr); + if (kr != KERN_SUCCESS) { + upl_unlock(upl); + return(kr); + } + } + 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) + panic("vm_map_enter failed for a Vector UPL\n"); } - vm_object_lock(upl->map_object); - for(addr=*dst_addr; size > 0; size-=PAGE_SIZE,addr+=PAGE_SIZE) { + for (addr = *dst_addr; size > 0; size -= PAGE_SIZE, addr += PAGE_SIZE) { m = vm_page_lookup(upl->map_object, offset); - if(m) { - unsigned int cache_attr; - cache_attr = ((unsigned int)m->object->wimg_bits) & VM_WIMG_MASK; + + if (m) { + unsigned int cache_attr; + cache_attr = ((unsigned int)m->object->wimg_bits) & VM_WIMG_MASK; + + m->pmapped = TRUE; + + /* 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, - cache_attr, TRUE); + PMAP_ENTER(map->pmap, addr, m, VM_PROT_ALL, cache_attr, TRUE); } - offset+=PAGE_SIZE_64; + offset += PAGE_SIZE_64; } vm_object_unlock(upl->map_object); - upl->ref_count++; /* hold a reference for the mapping */ + /* + * hold a reference for the mapping + */ + upl->ref_count++; upl->flags |= UPL_PAGE_LIST_MAPPED; - upl->kaddr = *dst_addr; + upl->kaddr = (vm_offset_t) *dst_addr; + assert(upl->kaddr == *dst_addr); + + if(isVectorUPL) + goto process_upl_to_enter; + upl_unlock(upl); + return KERN_SUCCESS; } @@ -3747,30 +4327,173 @@ vm_map_remove_upl( { vm_address_t addr; upl_size_t size; + int isVectorUPL = 0, curr_upl = 0; + upl_t vector_upl = NULL; if (upl == UPL_NULL) return KERN_INVALID_ARGUMENT; - upl_lock(upl); - if(upl->flags & UPL_PAGE_LIST_MAPPED) { + 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++) { + upl = vector_upl_subupl_byindex(vector_upl, curr_upl ); + if(upl == NULL) + continue; + valid_upls++; + if (!(UPL_PAGE_LIST_MAPPED & upl->flags)) + unmapped++; + } + + 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 { + upl_unlock(vector_upl); + return KERN_FAILURE; + } + } + curr_upl=0; + } + else + upl_lock(upl); + +process_upl_to_remove: + 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_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->flags & UPL_PAGE_LIST_MAPPED) { addr = upl->kaddr; size = upl->size; + assert(upl->ref_count > 1); upl->ref_count--; /* removing mapping ref */ + upl->flags &= ~UPL_PAGE_LIST_MAPPED; upl->kaddr = (vm_offset_t) 0; - upl_unlock(upl); - - vm_map_remove( map, + + if(!isVectorUPL) { + upl_unlock(upl); + + vm_map_remove(map, vm_map_trunc_page(addr), vm_map_round_page(addr + size), VM_MAP_NO_FLAGS); - return KERN_SUCCESS; + + return KERN_SUCCESS; + } + 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 + */ + goto process_upl_to_remove; + } } upl_unlock(upl); + return KERN_FAILURE; } +static void +dw_do_work( + vm_object_t object, + struct dw *dwp, + int dw_count) +{ + int j; + boolean_t held_as_spin = TRUE; + + /* + * pageout_scan takes the vm_page_lock_queues first + * then tries for the object lock... to avoid what + * is effectively a lock inversion, we'll go to the + * trouble of taking them in that same order... otherwise + * if this object contains the majority of the pages resident + * in the UBC (or a small set of large objects actively being + * worked on contain the majority of the pages), we could + * cause the pageout_scan thread to 'starve' in its attempt + * to find pages to move to the free queue, since it has to + * successfully acquire the object lock of any candidate page + * before it can steal/clean it. + */ + if (!vm_page_trylockspin_queues()) { + vm_object_unlock(object); + + vm_page_lockspin_queues(); + + for (j = 0; ; j++) { + if (!vm_object_lock_avoid(object) && + _vm_object_lock_try(object)) + break; + vm_page_unlock_queues(); + mutex_pause(j); + vm_page_lockspin_queues(); + } + } + for (j = 0; j < dw_count; j++, dwp++) { + + if (dwp->dw_mask & DW_vm_pageout_throttle_up) + vm_pageout_throttle_up(dwp->dw_m); + + if (dwp->dw_mask & DW_vm_page_wire) + vm_page_wire(dwp->dw_m); + else if (dwp->dw_mask & DW_vm_page_unwire) { + boolean_t queueit; + + queueit = (dwp->dw_mask & DW_vm_page_free) ? FALSE : TRUE; + + vm_page_unwire(dwp->dw_m, queueit); + } + if (dwp->dw_mask & DW_vm_page_free) { + if (held_as_spin == TRUE) { + vm_page_lockconvert_queues(); + held_as_spin = FALSE; + } + vm_page_free(dwp->dw_m); + } else { + if (dwp->dw_mask & DW_vm_page_deactivate_internal) + vm_page_deactivate_internal(dwp->dw_m, FALSE); + else if (dwp->dw_mask & DW_vm_page_activate) + vm_page_activate(dwp->dw_m); + else if (dwp->dw_mask & DW_vm_page_speculate) + vm_page_speculate(dwp->dw_m, TRUE); + else if (dwp->dw_mask & DW_vm_page_lru) + vm_page_lru(dwp->dw_m); + + if (dwp->dw_mask & DW_set_reference) + dwp->dw_m->reference = TRUE; + else if (dwp->dw_mask & DW_clear_reference) + dwp->dw_m->reference = FALSE; + + if (dwp->dw_mask & DW_clear_busy) + dwp->dw_m->busy = FALSE; + + if (dwp->dw_mask & DW_PAGE_WAKEUP) + PAGE_WAKEUP(dwp->dw_m); + } + } + vm_page_unlock_queues(); +} + + + kern_return_t upl_commit_range( upl_t upl, @@ -3781,311 +4504,476 @@ upl_commit_range( mach_msg_type_number_t count, boolean_t *empty) { - upl_size_t xfer_size = size; + upl_size_t xfer_size, subupl_size = size; vm_object_t shadow_object; - vm_object_t object = upl->map_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 delayed_unlock = 0; int clear_refmod = 0; - boolean_t shadow_internal; + int pgpgout_count = 0; + struct dw dw_array[DELAYED_WORK_LIMIT]; + struct dw *dwp; + int dw_count, isVectorUPL = 0; + upl_t vector_upl = NULL; *empty = FALSE; if (upl == UPL_NULL) return KERN_INVALID_ARGUMENT; - if (count == 0) page_list = NULL; - if (object->pageout) { - shadow_object = object->shadow; - } else { - shadow_object = object; + if((isVectorUPL = vector_upl_is_valid(upl))) { + vector_upl = upl; + upl_lock(vector_upl); } + else + upl_lock(upl); - upl_lock(upl); +process_upl_to_commit: - if (upl->flags & UPL_ACCESS_BLOCKED) { - /* - * We used this UPL to block access to the pages by marking - * them "busy". Now we need to clear the "busy" bit to allow - * access to these pages again. - */ - flags |= UPL_COMMIT_ALLOW_ACCESS; + if(isVectorUPL) { + size = subupl_size; + offset = subupl_offset; + if(size == 0) { + upl_unlock(vector_upl); + return KERN_SUCCESS; + } + upl = vector_upl_subupl_byoffset(vector_upl, &offset, &size); + if(upl == NULL) { + upl_unlock(vector_upl); + return KERN_FAILURE; + } + page_list = UPL_GET_INTERNAL_PAGE_LIST_SIMPLE(upl); + subupl_size -= size; + subupl_offset += size; } - if (upl->flags & UPL_CLEAR_DIRTY) - flags |= UPL_COMMIT_CLEAR_DIRTY; +#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); - if (upl->flags & UPL_DEVICE_MEMORY) { + upl->upl_commit_index++; + } +#endif + if (upl->flags & UPL_DEVICE_MEMORY) xfer_size = 0; - } else if ((offset + size) > upl->size) { - upl_unlock(upl); + else if ((offset + size) <= upl->size) + xfer_size = size; + else { + if(!isVectorUPL) + upl_unlock(upl); + else { + upl_unlock(vector_upl); + } return KERN_FAILURE; } + if (upl->flags & UPL_CLEAR_DIRTY) + flags |= UPL_COMMIT_CLEAR_DIRTY; - 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 { - lite_list = (wpl_array_t) - (((uintptr_t)upl) + sizeof(struct upl)); - } - if (object != shadow_object) - vm_object_lock(object); - vm_object_lock(shadow_object); + 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 + lite_list = (wpl_array_t) (((uintptr_t)upl) + sizeof(struct upl)); - shadow_internal = shadow_object->internal; + object = upl->map_object; + if (upl->flags & UPL_SHADOWED) { + vm_object_lock(object); + shadow_object = object->shadow; + } else { + shadow_object = object; + } entry = offset/PAGE_SIZE; target_offset = (vm_object_offset_t)offset; + if (upl->flags & UPL_KERNEL_OBJECT) + vm_object_lock_shared(shadow_object); + else + vm_object_lock(shadow_object); + + if (upl->flags & UPL_ACCESS_BLOCKED) { + assert(shadow_object->blocked_access); + shadow_object->blocked_access = FALSE; + vm_object_wakeup(object, VM_OBJECT_EVENT_UNBLOCKED); + } + + if (shadow_object->code_signed) { + /* + * CODE SIGNING: + * If the object is code-signed, do not let this UPL tell + * us if the pages are valid or not. Let the pages be + * validated by VM the normal way (when they get mapped or + * copied). + */ + flags &= ~UPL_COMMIT_CS_VALIDATED; + } + if (! page_list) { + /* + * No page list to get the code-signing info from !? + */ + flags &= ~UPL_COMMIT_CS_VALIDATED; + } + + dwp = &dw_array[0]; + dw_count = 0; + while (xfer_size) { - vm_page_t t,m; - upl_page_info_t *p; + vm_page_t t, m; + + dwp->dw_mask = 0; + clear_refmod = 0; m = VM_PAGE_NULL; if (upl->flags & UPL_LITE) { - int pg_num; + unsigned int pg_num; - pg_num = target_offset/PAGE_SIZE; + 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)); - 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, target_offset + (upl->offset - shadow_object->paging_offset)); } } - if (object->pageout) { - if ((t = vm_page_lookup(object, target_offset)) != NULL) { + if (upl->flags & UPL_SHADOWED) { + if ((t = vm_page_lookup(object, target_offset)) != VM_PAGE_NULL) { + t->pageout = FALSE; - if (delayed_unlock) { - delayed_unlock = 0; - vm_page_unlock_queues(); - } VM_PAGE_FREE(t); - if (m == NULL) { - m = vm_page_lookup( - shadow_object, - target_offset + - object->shadow_offset); - } - if (m != VM_PAGE_NULL) - vm_object_paging_end(m->object); + if (m == VM_PAGE_NULL) + m = vm_page_lookup(shadow_object, target_offset + object->shadow_offset); } } - if (m != VM_PAGE_NULL) { + if ((upl->flags & UPL_KERNEL_OBJECT) || m == VM_PAGE_NULL) + goto commit_next_page; - clear_refmod = 0; - - if (upl->flags & UPL_IO_WIRE) { + if (flags & UPL_COMMIT_CS_VALIDATED) { + /* + * CODE SIGNING: + * 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; + } + if (upl->flags & UPL_IO_WIRE) { - if (delayed_unlock == 0) - vm_page_lock_queues(); + if (page_list) + page_list[entry].phys_addr = 0; - vm_page_unwire(m); + if (flags & UPL_COMMIT_SET_DIRTY) + m->dirty = TRUE; + else if (flags & UPL_COMMIT_CLEAR_DIRTY) { + m->dirty = FALSE; - if (delayed_unlock++ > DELAYED_UNLOCK_LIMIT) { - delayed_unlock = 0; - vm_page_unlock_queues(); - } - if (page_list) { - page_list[entry].phys_addr = 0; - } - if (flags & UPL_COMMIT_SET_DIRTY) { - m->dirty = TRUE; - } else if (flags & UPL_COMMIT_CLEAR_DIRTY) { - m->dirty = FALSE; + if (! (flags & UPL_COMMIT_CS_VALIDATED) && + m->cs_validated && !m->cs_tainted) { + /* + * CODE SIGNING: + * This page is no longer dirty + * but could have been modified, + * so it will need to be + * re-validated. + */ + m->cs_validated = FALSE; +#if DEVELOPMENT || DEBUG + vm_cs_validated_resets++; +#endif + pmap_disconnect(m->phys_page); + } clear_refmod |= VM_MEM_MODIFIED; - } - if (flags & UPL_COMMIT_INACTIVATE) { - m->reference = FALSE; + } + if (flags & UPL_COMMIT_INACTIVATE) { + dwp->dw_mask |= DW_vm_page_deactivate_internal; clear_refmod |= VM_MEM_REFERENCED; - vm_page_deactivate(m); } - if (clear_refmod) - pmap_clear_refmod(m->phys_page, clear_refmod); - - if (flags & UPL_COMMIT_ALLOW_ACCESS) { + if (upl->flags & UPL_ACCESS_BLOCKED) { /* * We blocked access to the pages in this UPL. * Clear the "busy" bit and wake up any waiter * for this page. */ - PAGE_WAKEUP_DONE(m); + 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; + dwp->dw_mask |= (DW_clear_busy | DW_PAGE_WAKEUP); + } + } else + dwp->dw_mask |= DW_vm_page_unwire; - target_offset += PAGE_SIZE_64; - xfer_size -= PAGE_SIZE; - entry++; - continue; - } - if (delayed_unlock == 0) - vm_page_lock_queues(); - /* - * make sure to clear the hardware - * modify or reference bits before - * releasing the BUSY bit on this page - * otherwise we risk losing a legitimate - * change of state - */ - if (flags & UPL_COMMIT_CLEAR_DIRTY) { + goto commit_next_page; + } + /* + * make sure to clear the hardware + * modify or reference bits before + * releasing the BUSY bit on this page + * otherwise we risk losing a legitimate + * change of state + */ + if (flags & UPL_COMMIT_CLEAR_DIRTY) { m->dirty = FALSE; - clear_refmod |= VM_MEM_MODIFIED; - } - if (flags & UPL_COMMIT_INACTIVATE) - clear_refmod |= VM_MEM_REFERENCED; - if (clear_refmod) - pmap_clear_refmod(m->phys_page, clear_refmod); + if (! (flags & UPL_COMMIT_CS_VALIDATED) && + m->cs_validated && !m->cs_tainted) { + /* + * CODE SIGNING: + * This page is no longer dirty + * but could have been modified, + * so it will need to be + * re-validated. + */ + m->cs_validated = FALSE; +#if DEVELOPMENT || DEBUG + vm_cs_validated_resets++; +#endif + pmap_disconnect(m->phys_page); + } + clear_refmod |= VM_MEM_MODIFIED; + } + if (page_list) { + upl_page_info_t *p; - if (page_list) { p = &(page_list[entry]); - if(p->phys_addr && p->pageout && !m->pageout) { + + if (p->phys_addr && p->pageout && !m->pageout) { m->busy = TRUE; m->pageout = TRUE; - vm_page_wire(m); - } else if (page_list[entry].phys_addr && - !p->pageout && m->pageout && - !m->dump_cleaning) { + + dwp->dw_mask |= DW_vm_page_wire; + + } else if (p->phys_addr && + !p->pageout && m->pageout && + !m->dump_cleaning) { m->pageout = FALSE; m->absent = FALSE; m->overwriting = FALSE; - vm_page_unwire(m); - PAGE_WAKEUP_DONE(m); + + dwp->dw_mask |= (DW_vm_page_unwire | DW_clear_busy | DW_PAGE_WAKEUP); } page_list[entry].phys_addr = 0; - } - m->dump_cleaning = FALSE; - if(m->laundry) { - vm_pageout_throttle_up(m); - } - if(m->pageout) { - m->cleaning = FALSE; - m->pageout = FALSE; + } + m->dump_cleaning = FALSE; + + if (m->laundry) + dwp->dw_mask |= DW_vm_pageout_throttle_up; + + if (m->pageout) { + m->cleaning = FALSE; + m->encrypted_cleaning = FALSE; + m->pageout = FALSE; #if MACH_CLUSTER_STATS - if (m->wanted) vm_pageout_target_collisions++; + if (m->wanted) vm_pageout_target_collisions++; #endif - if (pmap_disconnect(m->phys_page) & VM_MEM_MODIFIED) - m->dirty = TRUE; - else - m->dirty = FALSE; + m->dirty = FALSE; - if(m->dirty) { - vm_page_unwire(m);/* reactivates */ + if (! (flags & UPL_COMMIT_CS_VALIDATED) && + m->cs_validated && !m->cs_tainted) { + /* + * CODE SIGNING: + * This page is no longer dirty + * but could have been modified, + * so it will need to be + * re-validated. + */ + m->cs_validated = FALSE; +#if DEVELOPMENT || DEBUG + vm_cs_validated_resets++; +#endif + pmap_disconnect(m->phys_page); + } + + if ((flags & UPL_COMMIT_SET_DIRTY) || + (m->pmapped && (pmap_disconnect(m->phys_page) & VM_MEM_MODIFIED))) + m->dirty = TRUE; + + if (m->dirty) { + /* + * page was re-dirtied after we started + * the pageout... reactivate it since + * we don't know whether the on-disk + * copy matches what is now in memory + */ + dwp->dw_mask |= (DW_vm_page_unwire | DW_clear_busy | 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); + } + } else { + /* + * page has been successfully cleaned + * go ahead and free it for other use + */ - if (upl->flags & UPL_PAGEOUT) { - CLUSTER_STAT(vm_pageout_target_page_dirtied++;) - VM_STAT(reactivations++); - } - PAGE_WAKEUP_DONE(m); - } else { - vm_page_free(m);/* clears busy, etc. */ + if (m->object->internal) { + DTRACE_VM2(anonpgout, int, 1, (uint64_t *), NULL); + } else { + DTRACE_VM2(fspgout, int, 1, (uint64_t *), NULL); + } + dwp->dw_mask |= DW_vm_page_free; - if (upl->flags & UPL_PAGEOUT) { - CLUSTER_STAT(vm_pageout_target_page_freed++;) - - if (page_list[entry].dirty) - VM_STAT(pageouts++); - } - } - if (delayed_unlock++ > DELAYED_UNLOCK_LIMIT) { - delayed_unlock = 0; - vm_page_unlock_queues(); - } - target_offset += PAGE_SIZE_64; - xfer_size -= PAGE_SIZE; - entry++; - continue; - } + if (upl->flags & UPL_PAGEOUT) { + CLUSTER_STAT(vm_pageout_target_page_freed++;) + + if (page_list[entry].dirty) { + VM_STAT_INCR(pageouts); + DTRACE_VM2(pgout, int, 1, (uint64_t *), NULL); + pgpgout_count++; + } + } + } + goto commit_next_page; + } #if MACH_CLUSTER_STATS - m->dirty = pmap_is_modified(m->phys_page); + 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++; -#else - m->dirty = 0; + if (m->dirty) vm_pageout_cluster_dirtied++; + else vm_pageout_cluster_cleaned++; + if (m->wanted) vm_pageout_cluster_collisions++; #endif + m->dirty = FALSE; - if((m->busy) && (m->cleaning)) { - /* the request_page_list case */ - if(m->absent) { - m->absent = FALSE; - if(shadow_object->absent_count == 1) - vm_object_absent_release(shadow_object); - else - shadow_object->absent_count--; - } + if (! (flags & UPL_COMMIT_CS_VALIDATED) && + m->cs_validated && !m->cs_tainted) { + /* + * CODE SIGNING: + * This page is no longer dirty + * but could have been modified, + * so it will need to be + * re-validated. + */ + m->cs_validated = FALSE; +#if DEVELOPMENT || DEBUG + vm_cs_validated_resets++; +#endif + pmap_disconnect(m->phys_page); + } + + if ((m->busy) && (m->cleaning)) { + /* + * the request_page_list case + */ + m->absent = FALSE; m->overwriting = FALSE; - m->busy = FALSE; - m->dirty = FALSE; - } else if (m->overwriting) { - /* alternate request page list, write to - * page_list case. Occurs when the original - * page was wired at the time of the list - * request */ - assert(m->wire_count != 0); - vm_page_unwire(m);/* reactivates */ - m->overwriting = FALSE; - } - m->cleaning = FALSE; - /* It is a part of the semantic of COPYOUT_FROM */ - /* UPLs that a commit implies cache sync */ - /* between the vm page and the backing store */ - /* this can be used to strip the precious bit */ - /* as well as clean */ - if (upl->flags & UPL_PAGE_SYNC_DONE) - m->precious = FALSE; + dwp->dw_mask |= DW_clear_busy; - if (flags & UPL_COMMIT_SET_DIRTY) - m->dirty = TRUE; + } else if (m->overwriting) { + /* + * alternate request page list, write to + * page_list case. Occurs when the original + * page was wired at the time of the list + * request + */ + assert(VM_PAGE_WIRED(m)); + m->overwriting = FALSE; - if (flags & UPL_COMMIT_INACTIVATE) { - m->reference = FALSE; - vm_page_deactivate(m); - } else if (!m->active && !m->inactive) { - if (m->reference) - vm_page_activate(m); - else - vm_page_deactivate(m); - } + dwp->dw_mask |= DW_vm_page_unwire; /* reactivates */ + } + m->cleaning = FALSE; + m->encrypted_cleaning = FALSE; - if (flags & UPL_COMMIT_ALLOW_ACCESS) { - /* - * We blocked access to the pages in this URL. - * Clear the "busy" bit on this page before we - * wake up any waiter. - */ - m->busy = FALSE; - } + /* + * It is a part of the semantic of COPYOUT_FROM + * UPLs that a commit implies cache sync + * between the vm page and the backing store + * 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; - /* - * Wakeup any thread waiting for the page to be un-cleaning. - */ - PAGE_WAKEUP(m); + if (flags & UPL_COMMIT_SET_DIRTY) + m->dirty = TRUE; - if (delayed_unlock++ > DELAYED_UNLOCK_LIMIT) { - delayed_unlock = 0; - vm_page_unlock_queues(); - } + if ((flags & UPL_COMMIT_INACTIVATE) && !m->clustered && !m->speculative) { + 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)) + dwp->dw_mask |= DW_vm_page_speculate; + else if (m->reference) + dwp->dw_mask |= DW_vm_page_activate; + else { + 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 URL. + * Clear the "busy" bit on this page before we + * wake up any waiter. + */ + 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); + target_offset += PAGE_SIZE_64; xfer_size -= PAGE_SIZE; entry++; + + if (dwp->dw_mask) { + if (dwp->dw_mask & ~(DW_clear_busy | DW_PAGE_WAKEUP)) { + if (m->busy == FALSE) { + /* + * dw_do_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. + */ + m->busy = TRUE; + dwp->dw_mask |= (DW_clear_busy | DW_PAGE_WAKEUP); + } + dwp->dw_m = m; + dwp++; + dw_count++; + + if (dw_count >= DELAYED_WORK_LIMIT) { + dw_do_work(shadow_object, &dw_array[0], dw_count); + + dwp = &dw_array[0]; + dw_count = 0; + } + } else { + if (dwp->dw_mask & DW_clear_busy) + m->busy = FALSE; + + if (dwp->dw_mask & DW_PAGE_WAKEUP) + PAGE_WAKEUP(m); + } + } } - if (delayed_unlock) - vm_page_unlock_queues(); + if (dw_count) + dw_do_work(shadow_object, &dw_array[0], dw_count); occupied = 1; @@ -4094,32 +4982,75 @@ upl_commit_range( } else if (upl->flags & UPL_LITE) { int pg_num; int i; + pg_num = upl->size/PAGE_SIZE; pg_num = (pg_num + 31) >> 5; occupied = 0; - for(i= 0; imap_object->memq)) { + if (queue_empty(&upl->map_object->memq)) occupied = 0; - } } - - if(occupied == 0) { - if(upl->flags & UPL_COMMIT_NOTIFY_EMPTY) { + if (occupied == 0) { + /* + * If this UPL element belongs to a Vector UPL and is + * empty, then this is the right function to deallocate + * it. So go ahead set the *empty variable. The flag + * UPL_COMMIT_NOTIFY_EMPTY, from the caller's point of view + * should be considered relevant for the Vector UPL and not + * the internal UPLs. + */ + 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 + * against this object + */ + vm_object_activity_end(shadow_object); + } else { + /* + * we dontated the paging reference to + * the map object... vm_pageout_object_terminate + * will drop this reference + */ } - if(object == shadow_object) - vm_object_paging_end(shadow_object); } vm_object_unlock(shadow_object); if (object != shadow_object) vm_object_unlock(object); - upl_unlock(upl); + + 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_commit_range or ubc_upl_commit, 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_commit; + } + + if (pgpgout_count) { + DTRACE_VM2(pgpgout, int, pgpgout_count, (uint64_t *), NULL); + } return KERN_SUCCESS; } @@ -4132,46 +5063,78 @@ upl_abort_range( int error, boolean_t *empty) { - upl_size_t xfer_size = size; + upl_size_t xfer_size, subupl_size = size; vm_object_t shadow_object; - vm_object_t object = upl->map_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; - boolean_t shadow_internal; + struct dw dw_array[DELAYED_WORK_LIMIT]; + struct dw *dwp; + int dw_count, isVectorUPL = 0; + upl_t vector_upl = NULL; *empty = FALSE; if (upl == UPL_NULL) return KERN_INVALID_ARGUMENT; - if (upl->flags & UPL_IO_WIRE) { - return upl_commit_range(upl, - offset, size, 0, - NULL, 0, empty); - } + 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(object->pageout) { - shadow_object = object->shadow; - } else { - shadow_object = object; + if((isVectorUPL = vector_upl_is_valid(upl))) { + vector_upl = upl; + upl_lock(vector_upl); + } + else + upl_lock(upl); + +process_upl_to_abort: + if(isVectorUPL) { + size = subupl_size; + offset = subupl_offset; + if(size == 0) { + upl_unlock(vector_upl); + return KERN_SUCCESS; + } + upl = vector_upl_subupl_byoffset(vector_upl, &offset, &size); + if(upl == NULL) { + upl_unlock(vector_upl); + return KERN_FAILURE; + } + subupl_size -= size; + subupl_offset += size; } - upl_lock(upl); - if(upl->flags & UPL_DEVICE_MEMORY) { + *empty = FALSE; + +#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) xfer_size = 0; - } else if ((offset + size) > upl->size) { - upl_unlock(upl); + else if ((offset + size) <= upl->size) + xfer_size = size; + else { + if(!isVectorUPL) + upl_unlock(upl); + else { + upl_unlock(vector_upl); + } + return KERN_FAILURE; } - if (object != shadow_object) - vm_object_lock(object); - vm_object_lock(shadow_object); - - shadow_internal = shadow_object->internal; - - 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))); @@ -4179,272 +5142,94 @@ upl_abort_range( lite_list = (wpl_array_t) (((uintptr_t)upl) + sizeof(struct upl)); } + object = upl->map_object; + + if (upl->flags & UPL_SHADOWED) { + vm_object_lock(object); + shadow_object = object->shadow; + } else + shadow_object = object; entry = offset/PAGE_SIZE; target_offset = (vm_object_offset_t)offset; - while(xfer_size) { - vm_page_t t,m; - - m = VM_PAGE_NULL; - if(upl->flags & UPL_LITE) { - int pg_num; - 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)); - m = vm_page_lookup(shadow_object, - target_offset + (upl->offset - - shadow_object->paging_offset)); - } - } - if(object->pageout) { - if ((t = vm_page_lookup(object, target_offset)) - != NULL) { - t->pageout = FALSE; - VM_PAGE_FREE(t); - if(m == NULL) { - m = vm_page_lookup( - shadow_object, - target_offset + - object->shadow_offset); - } - if(m != VM_PAGE_NULL) - vm_object_paging_end(m->object); - } - } - if(m != VM_PAGE_NULL) { - vm_page_lock_queues(); - if(m->absent) { - boolean_t must_free = TRUE; - /* COPYOUT = FALSE case */ - /* check for error conditions which must */ - /* be passed back to the pages customer */ - if(error & UPL_ABORT_RESTART) { - m->restart = TRUE; - m->absent = FALSE; - vm_object_absent_release(m->object); - m->page_error = KERN_MEMORY_ERROR; - m->error = TRUE; - must_free = FALSE; - } else if(error & UPL_ABORT_UNAVAILABLE) { - m->restart = FALSE; - m->unusual = TRUE; - must_free = FALSE; - } else if(error & UPL_ABORT_ERROR) { - m->restart = FALSE; - m->absent = FALSE; - vm_object_absent_release(m->object); - m->page_error = KERN_MEMORY_ERROR; - m->error = TRUE; - must_free = 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->overwriting = FALSE; - PAGE_WAKEUP_DONE(m); - - if (must_free == TRUE) { - vm_page_free(m); - } else { - vm_page_activate(m); - } - vm_page_unlock_queues(); - - target_offset += PAGE_SIZE_64; - xfer_size -= PAGE_SIZE; - entry++; - continue; - } - /* - * Handle the trusted pager throttle. - */ - if (m->laundry) { - vm_pageout_throttle_up(m); - } - if(m->pageout) { - assert(m->busy); - assert(m->wire_count == 1); - m->pageout = FALSE; - vm_page_unwire(m); - } - m->dump_cleaning = FALSE; - m->cleaning = FALSE; - m->overwriting = FALSE; -#if MACH_PAGEMAP - vm_external_state_clr( - m->object->existence_map, m->offset); -#endif /* MACH_PAGEMAP */ - if(error & UPL_ABORT_DUMP_PAGES) { - vm_page_free(m); - pmap_disconnect(m->phys_page); - } else { - PAGE_WAKEUP_DONE(m); - } - vm_page_unlock_queues(); - } - target_offset += PAGE_SIZE_64; - xfer_size -= PAGE_SIZE; - entry++; - } - occupied = 1; - if (upl->flags & UPL_DEVICE_MEMORY) { - occupied = 0; - } else if (upl->flags & UPL_LITE) { - int pg_num; - int i; - pg_num = upl->size/PAGE_SIZE; - pg_num = (pg_num + 31) >> 5; - occupied = 0; - for(i= 0; imap_object->memq)) { - occupied = 0; - } - } - - if(occupied == 0) { - if(upl->flags & UPL_COMMIT_NOTIFY_EMPTY) { - *empty = TRUE; - } - if(object == shadow_object) - vm_object_paging_end(shadow_object); - } - vm_object_unlock(shadow_object); - if (object != shadow_object) - vm_object_unlock(object); - - upl_unlock(upl); - - return KERN_SUCCESS; -} - -kern_return_t -upl_abort( - upl_t upl, - int error) -{ - vm_object_t object = NULL; - vm_object_t shadow_object = NULL; - vm_object_offset_t offset; - vm_object_offset_t shadow_offset; - vm_object_offset_t target_offset; - upl_size_t i; - wpl_array_t lite_list; - vm_page_t t,m; - int occupied; - boolean_t shadow_internal; - - if (upl == UPL_NULL) - return KERN_INVALID_ARGUMENT; + if (upl->flags & UPL_KERNEL_OBJECT) + vm_object_lock_shared(shadow_object); + else + vm_object_lock(shadow_object); - if (upl->flags & UPL_IO_WIRE) { - boolean_t empty; - return upl_commit_range(upl, - 0, upl->size, 0, - NULL, 0, &empty); + if (upl->flags & UPL_ACCESS_BLOCKED) { + assert(shadow_object->blocked_access); + shadow_object->blocked_access = FALSE; + vm_object_wakeup(object, VM_OBJECT_EVENT_UNBLOCKED); } - upl_lock(upl); - if(upl->flags & UPL_DEVICE_MEMORY) { - upl_unlock(upl); - return KERN_SUCCESS; - } + dwp = &dw_array[0]; + dw_count = 0; - object = upl->map_object; + if ((error & UPL_ABORT_DUMP_PAGES) && (upl->flags & UPL_KERNEL_OBJECT)) + panic("upl_abort_range: kernel_object being DUMPED"); - if (object == NULL) { - panic("upl_abort: upl object is not backed by an object"); - upl_unlock(upl); - return KERN_INVALID_ARGUMENT; - } + while (xfer_size) { + vm_page_t t, m; - if(object->pageout) { - shadow_object = object->shadow; - shadow_offset = object->shadow_offset; - } else { - shadow_object = object; - shadow_offset = upl->offset - object->paging_offset; - } + dwp->dw_mask = 0; - 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 { - lite_list = (wpl_array_t) - (((uintptr_t)upl) + sizeof(struct upl)); - } - offset = 0; + m = VM_PAGE_NULL; - if (object != shadow_object) - vm_object_lock(object); - vm_object_lock(shadow_object); + if (upl->flags & UPL_LITE) { + unsigned int pg_num; - shadow_internal = shadow_object->internal; + pg_num = (unsigned int) (target_offset/PAGE_SIZE); + assert(pg_num == target_offset/PAGE_SIZE); + - for(i = 0; i<(upl->size); i+=PAGE_SIZE, offset += PAGE_SIZE_64) { - m = VM_PAGE_NULL; - target_offset = offset + shadow_offset; - if(upl->flags & UPL_LITE) { - int pg_num; - pg_num = offset/PAGE_SIZE; - if(lite_list[pg_num>>5] & (1 << (pg_num & 31))) { + if (lite_list[pg_num>>5] & (1 << (pg_num & 31))) { lite_list[pg_num>>5] &= ~(1 << (pg_num & 31)); - m = vm_page_lookup( - shadow_object, target_offset); + + if ( !(upl->flags & UPL_KERNEL_OBJECT)) + m = vm_page_lookup(shadow_object, target_offset + + (upl->offset - shadow_object->paging_offset)); } } - if(object->pageout) { - if ((t = vm_page_lookup(object, offset)) != NULL) { - t->pageout = FALSE; + if (upl->flags & UPL_SHADOWED) { + if ((t = vm_page_lookup(object, target_offset)) != VM_PAGE_NULL) { + t->pageout = FALSE; + VM_PAGE_FREE(t); - if(m == NULL) { - m = vm_page_lookup( - shadow_object, target_offset); - } - if(m != VM_PAGE_NULL) - vm_object_paging_end(m->object); + + if (m == VM_PAGE_NULL) + m = vm_page_lookup(shadow_object, target_offset + object->shadow_offset); } } - if(m != VM_PAGE_NULL) { - vm_page_lock_queues(); - if(m->absent) { + if ((upl->flags & UPL_KERNEL_OBJECT)) + goto abort_next_page; + + if (m != VM_PAGE_NULL) { + + if (m->absent) { boolean_t must_free = TRUE; - /* COPYOUT = FALSE case */ - /* check for error conditions which must */ - /* be passed back to the pages customer */ - if(error & UPL_ABORT_RESTART) { + m->clustered = FALSE; + /* + * COPYOUT = FALSE case + * check for error conditions which must + * be passed back to the pages customer + */ + if (error & UPL_ABORT_RESTART) { m->restart = TRUE; m->absent = FALSE; - vm_object_absent_release(m->object); - m->page_error = KERN_MEMORY_ERROR; - m->error = TRUE; + m->unusual = TRUE; must_free = FALSE; - } else if(error & UPL_ABORT_UNAVAILABLE) { + } else if (error & UPL_ABORT_UNAVAILABLE) { m->restart = FALSE; m->unusual = TRUE; must_free = FALSE; - } else if(error & UPL_ABORT_ERROR) { + } else if (error & UPL_ABORT_ERROR) { m->restart = FALSE; m->absent = FALSE; - vm_object_absent_release(m->object); - m->page_error = KERN_MEMORY_ERROR; m->error = TRUE; + m->unusual = TRUE; must_free = FALSE; } @@ -4458,206 +5243,194 @@ upl_abort( */ m->cleaning = FALSE; + m->encrypted_cleaning = FALSE; m->overwriting = FALSE; - PAGE_WAKEUP_DONE(m); - if (must_free == TRUE) { - vm_page_free(m); - } else { - vm_page_activate(m); + dwp->dw_mask |= (DW_clear_busy | DW_PAGE_WAKEUP); + + if (must_free == TRUE) + dwp->dw_mask |= DW_vm_page_free; + else + dwp->dw_mask |= DW_vm_page_activate; + } else { + /* + * Handle the trusted pager throttle. + */ + if (m->laundry) + dwp->dw_mask |= DW_vm_pageout_throttle_up; + + if (m->pageout) { + assert(m->busy); + assert(m->wire_count == 1); + m->pageout = FALSE; + + dwp->dw_mask |= DW_vm_page_unwire; } - vm_page_unlock_queues(); - continue; - } - /* - * Handle the trusted pager throttle. - */ - if (m->laundry) { - vm_pageout_throttle_up(m); - } - if(m->pageout) { - assert(m->busy); - assert(m->wire_count == 1); - m->pageout = FALSE; - vm_page_unwire(m); - } - m->dump_cleaning = FALSE; - m->cleaning = FALSE; - m->overwriting = FALSE; + m->dump_cleaning = FALSE; + m->cleaning = FALSE; + m->encrypted_cleaning = FALSE; + m->overwriting = FALSE; #if MACH_PAGEMAP - vm_external_state_clr( - m->object->existence_map, m->offset); + vm_external_state_clr(m->object->existence_map, m->offset); #endif /* MACH_PAGEMAP */ - if(error & UPL_ABORT_DUMP_PAGES) { - vm_page_free(m); - pmap_disconnect(m->phys_page); + if (error & UPL_ABORT_DUMP_PAGES) { + pmap_disconnect(m->phys_page); + + dwp->dw_mask |= DW_vm_page_free; + } else { + if (error & UPL_ABORT_REFERENCE) { + /* + * we've been told to explictly + * 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; + } + dwp->dw_mask |= (DW_clear_busy | DW_PAGE_WAKEUP); + } + } + } +abort_next_page: + target_offset += PAGE_SIZE_64; + xfer_size -= PAGE_SIZE; + entry++; + + if (dwp->dw_mask) { + if (dwp->dw_mask & ~(DW_clear_busy | DW_PAGE_WAKEUP)) { + if (m->busy == FALSE) { + /* + * dw_do_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. + */ + m->busy = TRUE; + dwp->dw_mask |= (DW_clear_busy | DW_PAGE_WAKEUP); + } + dwp->dw_m = m; + dwp++; + dw_count++; + + if (dw_count >= DELAYED_WORK_LIMIT) { + dw_do_work(shadow_object, &dw_array[0], dw_count); + + dwp = &dw_array[0]; + dw_count = 0; + } } else { - PAGE_WAKEUP_DONE(m); + if (dwp->dw_mask & DW_clear_busy) + m->busy = FALSE; + + if (dwp->dw_mask & DW_PAGE_WAKEUP) + PAGE_WAKEUP(m); } - vm_page_unlock_queues(); } } + if (dw_count) + dw_do_work(shadow_object, &dw_array[0], dw_count); + occupied = 1; + if (upl->flags & UPL_DEVICE_MEMORY) { occupied = 0; } else if (upl->flags & UPL_LITE) { int pg_num; - int j; + int i; + pg_num = upl->size/PAGE_SIZE; pg_num = (pg_num + 31) >> 5; occupied = 0; - for(j= 0; jmap_object->memq)) { + if (queue_empty(&upl->map_object->memq)) occupied = 0; - } } + if (occupied == 0) { + /* + * If this UPL element belongs to a Vector UPL and is + * empty, then this is the right function to deallocate + * it. So go ahead set the *empty variable. The flag + * UPL_COMMIT_NOTIFY_EMPTY, from the caller's point of view + * should be considered relevant for the Vector UPL and + * not the internal UPLs. + */ + if ((upl->flags & UPL_COMMIT_NOTIFY_EMPTY) || isVectorUPL) + *empty = TRUE; - if(occupied == 0) { - if(object == shadow_object) - vm_object_paging_end(shadow_object); + 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 + * against this object + */ + vm_object_activity_end(shadow_object); + } else { + /* + * 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) + 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); + upl_deallocate(upl); + } + goto process_upl_to_abort; + } - upl_unlock(upl); return KERN_SUCCESS; } -/* 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) -{ - if (upl == UPL_NULL) - return KERN_INVALID_ARGUMENT; - - if(upl->flags & (UPL_LITE | UPL_IO_WIRE)) { - boolean_t empty; - return upl_commit_range(upl, 0, upl->size, 0, - page_list, count, &empty); - } - - if (count == 0) - page_list = NULL; - - upl_lock(upl); - if (upl->flags & UPL_DEVICE_MEMORY) - page_list = NULL; - - if (upl->flags & UPL_ENCRYPTED) { - /* - * ENCRYPTED SWAP: - * This UPL was encrypted, but we don't need - * to decrypt here. We'll decrypt each page - * later, on demand, as soon as someone needs - * to access the page's contents. - */ - } - - if ((upl->flags & UPL_CLEAR_DIRTY) || - (upl->flags & UPL_PAGE_SYNC_DONE) || page_list) { - vm_object_t shadow_object = upl->map_object->shadow; - vm_object_t object = upl->map_object; - vm_object_offset_t target_offset; - upl_size_t xfer_end; - int entry; - - vm_page_t t, m; - upl_page_info_t *p; - - if (object != shadow_object) - vm_object_lock(object); - vm_object_lock(shadow_object); - entry = 0; - target_offset = object->shadow_offset; - xfer_end = upl->size + object->shadow_offset; +kern_return_t +upl_abort( + upl_t upl, + int error) +{ + boolean_t empty; - while(target_offset < xfer_end) { + return upl_abort_range(upl, 0, upl->size, error, &empty); +} - if ((t = vm_page_lookup(object, - target_offset - object->shadow_offset)) - == NULL) { - target_offset += PAGE_SIZE_64; - entry++; - continue; - } - m = vm_page_lookup(shadow_object, target_offset); - if(m != VM_PAGE_NULL) { - /* - * ENCRYPTED SWAP: - * If this page was encrypted, we - * don't need to decrypt it here. - * We'll decrypt it later, on demand, - * as soon as someone needs to access - * its contents. - */ - - if (upl->flags & UPL_CLEAR_DIRTY) { - pmap_clear_modify(m->phys_page); - m->dirty = FALSE; - } - /* It is a part of the semantic of */ - /* COPYOUT_FROM UPLs that a commit */ - /* implies cache sync between the */ - /* vm page and the backing store */ - /* this can be used to strip the */ - /* precious bit as well as clean */ - if (upl->flags & UPL_PAGE_SYNC_DONE) - m->precious = FALSE; - - if(page_list) { - p = &(page_list[entry]); - if(page_list[entry].phys_addr && - p->pageout && !m->pageout) { - vm_page_lock_queues(); - m->busy = TRUE; - m->pageout = TRUE; - vm_page_wire(m); - vm_page_unlock_queues(); - } else if (page_list[entry].phys_addr && - !p->pageout && m->pageout && - !m->dump_cleaning) { - vm_page_lock_queues(); - m->pageout = FALSE; - m->absent = FALSE; - m->overwriting = FALSE; - vm_page_unwire(m); - PAGE_WAKEUP_DONE(m); - vm_page_unlock_queues(); - } - page_list[entry].phys_addr = 0; - } - } - target_offset += PAGE_SIZE_64; - entry++; - } - vm_object_unlock(shadow_object); - if (object != shadow_object) - vm_object_unlock(object); +/* 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) +{ + boolean_t empty; - } - if (upl->flags & UPL_DEVICE_MEMORY) { - vm_object_lock(upl->map_object->shadow); - if(upl->map_object == upl->map_object->shadow) - vm_object_paging_end(upl->map_object->shadow); - vm_object_unlock(upl->map_object->shadow); - } - upl_unlock(upl); - return KERN_SUCCESS; + return upl_commit_range(upl, 0, upl->size, 0, page_list, count, &empty); } +unsigned int vm_object_iopl_request_sleep_for_cleaning = 0; kern_return_t vm_object_iopl_request( @@ -4670,18 +5443,20 @@ vm_object_iopl_request( int cntrl_flags) { vm_page_t dst_page; - vm_object_offset_t dst_offset = offset; - upl_size_t xfer_size = size; + 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 page_field_size; - int delayed_unlock = 0; int no_zero_fill = FALSE; - vm_page_t alias_page = NULL; + u_int32_t psize; kern_return_t ret; vm_prot_t prot; - + struct vm_object_fault_info fault_info; + struct dw dw_array[DELAYED_WORK_LIMIT]; + struct dw *dwp; + int dw_count; + int dw_index; if (cntrl_flags & ~UPL_VALID_FLAGS) { /* @@ -4690,6 +5465,21 @@ vm_object_iopl_request( */ return KERN_INVALID_VALUE; } + 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 (object->phys_contiguous) { + if ((offset + object->shadow_offset) >= (vm_object_offset_t)max_valid_dma_address) + return KERN_INVALID_ADDRESS; + + if (((offset + object->shadow_offset) + size) >= (vm_object_offset_t)max_valid_dma_address) + return KERN_INVALID_ADDRESS; + } + } if (cntrl_flags & UPL_ENCRYPT) { /* @@ -4700,7 +5490,6 @@ vm_object_iopl_request( */ assert(! (cntrl_flags & UPL_ENCRYPT)); } - if (cntrl_flags & UPL_NOZEROFILL) no_zero_fill = TRUE; @@ -4709,154 +5498,178 @@ vm_object_iopl_request( else prot = VM_PROT_READ | VM_PROT_WRITE; - if(((size/page_size) > MAX_UPL_TRANSFER) && !object->phys_contiguous) { - size = MAX_UPL_TRANSFER * page_size; + 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; } + 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; - if(cntrl_flags & UPL_SET_INTERNAL) - if(page_list_count != NULL) - *page_list_count = MAX_UPL_TRANSFER; - 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; + if ((!object->internal) && (object->paging_offset != 0)) + panic("vm_object_iopl_request: external object with non-zero paging offset\n"); + + + if (object->phys_contiguous) + psize = PAGE_SIZE; + else + psize = size; + + if (cntrl_flags & UPL_SET_INTERNAL) { + upl = upl_create(UPL_CREATE_INTERNAL | UPL_CREATE_LITE, 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))); + if (size == 0) { + user_page_list = NULL; + lite_list = NULL; + } + } else { + upl = upl_create(UPL_CREATE_LITE, UPL_IO_WIRE, psize); - if((!object->internal) && (object->paging_offset != 0)) - panic("vm_object_upl_request: vnode object with non-zero paging offset\n"); + 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; + *upl_ptr = upl; - if(object->phys_contiguous) { - /* No paging operations are possible against this memory */ - /* and so no need for map object, ever */ - cntrl_flags |= UPL_SET_LITE; + upl->map_object = object; + upl->size = size; + + if (object == kernel_object && + !(cntrl_flags & (UPL_NEED_32BIT_ADDR | UPL_BLOCK_ACCESS))) { + upl->flags |= UPL_KERNEL_OBJECT; +#if UPL_DEBUG + vm_object_lock(object); +#else + vm_object_lock_shared(object); +#endif + } else { + vm_object_lock(object); + vm_object_activity_begin(object); } + /* + * paging in progress also protects the paging_offset + */ + upl->offset = offset + object->paging_offset; - if(upl_ptr) { - if(cntrl_flags & UPL_SET_INTERNAL) { - if(cntrl_flags & UPL_SET_LITE) { - upl = upl_create( - UPL_CREATE_INTERNAL | UPL_CREATE_LITE, - 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))); - page_field_size = ((size/PAGE_SIZE) + 7) >> 3; - page_field_size = - (page_field_size + 3) & 0xFFFFFFFC; - bzero((char *)lite_list, page_field_size); - upl->flags = - UPL_LITE | UPL_INTERNAL | UPL_IO_WIRE; - } else { - upl = upl_create(UPL_CREATE_INTERNAL, size); - user_page_list = (upl_page_info_t *) - (((uintptr_t)upl) - + sizeof(struct upl)); - upl->flags = UPL_INTERNAL | UPL_IO_WIRE; - } - } else { - if(cntrl_flags & UPL_SET_LITE) { - upl = upl_create(UPL_CREATE_LITE, size); - lite_list = (wpl_array_t) - (((uintptr_t)upl) + sizeof(struct upl)); - page_field_size = ((size/PAGE_SIZE) + 7) >> 3; - page_field_size = - (page_field_size + 3) & 0xFFFFFFFC; - bzero((char *)lite_list, page_field_size); - upl->flags = UPL_LITE | UPL_IO_WIRE; - } else { - upl = upl_create(UPL_CREATE_EXTERNAL, size); - upl->flags = UPL_IO_WIRE; - } + if (cntrl_flags & UPL_BLOCK_ACCESS) { + /* + * The user requested that access to the pages in this URL + * be blocked until the UPL is commited or aborted. + */ + upl->flags |= UPL_ACCESS_BLOCKED; + } + + if (object->phys_contiguous) { +#if UPL_DEBUG + queue_enter(&object->uplq, upl, upl_t, uplq); +#endif /* UPL_DEBUG */ + + if (upl->flags & UPL_ACCESS_BLOCKED) { + assert(!object->blocked_access); + object->blocked_access = TRUE; } - if(object->phys_contiguous) { - upl->map_object = object; - /* don't need any shadow mappings for this one */ - /* since it is already I/O memory */ - upl->flags |= UPL_DEVICE_MEMORY; + vm_object_unlock(object); - vm_object_lock(object); - vm_object_paging_begin(object); - vm_object_unlock(object); + /* + * don't need any shadow mappings for this one + * since it is already I/O memory + */ + upl->flags |= UPL_DEVICE_MEMORY; - /* paging in progress also protects the paging_offset */ - upl->offset = offset + object->paging_offset; - upl->size = size; - *upl_ptr = upl; - if(user_page_list) { - user_page_list[0].phys_addr = - (offset + object->shadow_offset)>>PAGE_SHIFT; - user_page_list[0].device = TRUE; - } + upl->highest_page = (ppnum_t) ((offset + object->shadow_offset + size - 1)>>PAGE_SHIFT); - if(page_list_count != NULL) { - if (upl->flags & UPL_INTERNAL) { - *page_list_count = 0; - } else { - *page_list_count = 1; - } - } - return KERN_SUCCESS; + if (user_page_list) { + user_page_list[0].phys_addr = (ppnum_t) ((offset + object->shadow_offset)>>PAGE_SHIFT); + user_page_list[0].device = TRUE; } - if(user_page_list) - user_page_list[0].device = FALSE; - - if(cntrl_flags & UPL_SET_LITE) { - upl->map_object = object; - } else { - upl->map_object = vm_object_allocate(size); - vm_object_lock(upl->map_object); - upl->map_object->shadow = object; - upl->map_object->pageout = TRUE; - upl->map_object->can_persist = FALSE; - upl->map_object->copy_strategy = - MEMORY_OBJECT_COPY_NONE; - upl->map_object->shadow_offset = offset; - upl->map_object->wimg_bits = object->wimg_bits; - vm_object_unlock(upl->map_object); + if (page_list_count != NULL) { + if (upl->flags & UPL_INTERNAL) + *page_list_count = 0; + else + *page_list_count = 1; } + return KERN_SUCCESS; } - vm_object_lock(object); - vm_object_paging_begin(object); - - if (!object->phys_contiguous) { - /* Protect user space from future COW operations */ + if (object != kernel_object) { + /* + * Protect user space from future COW operations + */ object->true_share = TRUE; + if (object->copy_strategy == MEMORY_OBJECT_COPY_SYMMETRIC) object->copy_strategy = MEMORY_OBJECT_COPY_DELAY; } - /* we can lock the upl offset now that paging_in_progress is set */ - if(upl_ptr) { - upl->size = size; - upl->offset = offset + object->paging_offset; - *upl_ptr = upl; -#ifdef UPL_DEBUG - queue_enter(&object->uplq, upl, upl_t, uplq); +#if UPL_DEBUG + queue_enter(&object->uplq, upl, upl_t, uplq); #endif /* UPL_DEBUG */ - } - if (cntrl_flags & UPL_BLOCK_ACCESS) { + if (!(cntrl_flags & UPL_COPYOUT_FROM) && + object->copy != VM_OBJECT_NULL) { /* - * The user requested that access to the pages in this URL - * be blocked until the UPL is commited or aborted. + * Honor copy-on-write obligations + * + * The caller is gathering these pages and + * might modify their contents. We need to + * make sure that the copy object has its own + * private copies of these pages before we let + * the caller modify them. + * + * NOTE: someone else could map the original object + * after we've done this copy-on-write here, and they + * could then see an inconsistent picture of the memory + * while it's being modified via the UPL. To prevent this, + * we would have to block access to these pages until the + * UPL is released. We could use the UPL_BLOCK_ACCESS + * code path for that... */ - upl->flags |= UPL_ACCESS_BLOCKED; + 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 } + entry = 0; + + xfer_size = size; + dst_offset = offset; + + 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.mark_zf_absent = TRUE; + + dwp = &dw_array[0]; + dw_count = 0; + while (xfer_size) { - if((alias_page == NULL) && !(cntrl_flags & UPL_SET_LITE)) { - if (delayed_unlock) { - delayed_unlock = 0; - vm_page_unlock_queues(); - } - vm_object_unlock(object); - VM_PAGE_GRAB_FICTITIOUS(alias_page); - vm_object_lock(object); - } + vm_fault_return_t result; + unsigned int pg_num; + + dwp->dw_mask = 0; + dst_page = vm_page_lookup(object, dst_offset); /* @@ -4864,91 +5677,94 @@ vm_object_iopl_request( * 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->unusual && (dst_page->error || - dst_page->restart || - dst_page->absent || - dst_page->fictitious || - (prot & dst_page->page_lock)))) { - vm_fault_return_t result; + 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"); + do { vm_page_t top_page; kern_return_t error_code; int interruptible; - vm_object_offset_t lo_offset = offset; - vm_object_offset_t hi_offset = offset + size; - - - if (delayed_unlock) { - delayed_unlock = 0; - vm_page_unlock_queues(); - } - - if(cntrl_flags & UPL_SET_INTERRUPTIBLE) { + if (cntrl_flags & UPL_SET_INTERRUPTIBLE) interruptible = THREAD_ABORTSAFE; - } else { + else interruptible = THREAD_UNINT; - } + + fault_info.interruptible = interruptible; + fault_info.cluster_size = xfer_size; + + vm_object_paging_begin(object); result = vm_fault_page(object, dst_offset, - prot | VM_PROT_WRITE, FALSE, - interruptible, - lo_offset, hi_offset, - VM_BEHAVIOR_SEQUENTIAL, - &prot, &dst_page, &top_page, - (int *)0, - &error_code, no_zero_fill, FALSE, NULL, 0); - - switch(result) { - case VM_FAULT_SUCCESS: + prot | VM_PROT_WRITE, FALSE, + &prot, &dst_page, &top_page, + (int *)0, + &error_code, no_zero_fill, + FALSE, &fault_info); - PAGE_WAKEUP_DONE(dst_page); + switch (result) { + + case VM_FAULT_SUCCESS: + if ( !dst_page->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 + */ + } /* * Release paging references and * top-level placeholder page, if any. */ - - if(top_page != VM_PAGE_NULL) { + if (top_page != VM_PAGE_NULL) { vm_object_t local_object; - local_object = - top_page->object; - if(top_page->object - != dst_page->object) { - vm_object_lock( - local_object); + + local_object = top_page->object; + + 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); + 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(local_object); } } - + vm_object_paging_end(object); break; - case VM_FAULT_RETRY: vm_object_lock(object); - vm_object_paging_begin(object); break; case VM_FAULT_FICTITIOUS_SHORTAGE: vm_page_more_fictitious(); + vm_object_lock(object); - vm_object_paging_begin(object); break; case VM_FAULT_MEMORY_SHORTAGE: if (vm_page_wait(interruptible)) { vm_object_lock(object); - vm_object_paging_begin(object); break; } /* fall thru */ @@ -4956,30 +5772,104 @@ vm_object_iopl_request( case VM_FAULT_INTERRUPTED: error_code = MACH_SEND_INTERRUPTED; case VM_FAULT_MEMORY_ERROR: - ret = (error_code ? error_code: - KERN_MEMORY_ERROR); + memory_error: + ret = (error_code ? error_code: KERN_MEMORY_ERROR); + vm_object_lock(object); - for(; offset < dst_offset; - offset += PAGE_SIZE) { - dst_page = vm_page_lookup( - object, offset); - if(dst_page == VM_PAGE_NULL) - panic("vm_object_iopl_request: Wired pages missing. \n"); - vm_page_lock_queues(); - vm_page_unwire(dst_page); - vm_page_unlock_queues(); - VM_STAT(reactivations++); - } + goto return_err; + + case VM_FAULT_SUCCESS_NO_VM_PAGE: + /* success but no page: fail */ + vm_object_paging_end(object); vm_object_unlock(object); - upl_destroy(upl); - return ret; + goto memory_error; + + default: + panic("vm_object_iopl_request: unexpected error" + " 0x%x from vm_fault_page()\n", result); } - } while ((result != VM_FAULT_SUCCESS) - || (result == VM_FAULT_INTERRUPTED)); + } while (result != VM_FAULT_SUCCESS); + } - if (delayed_unlock == 0) - vm_page_lock_queues(); - vm_page_wire(dst_page); + + if (upl->flags & UPL_KERNEL_OBJECT) + goto record_phys_addr; + + if (dst_page->cleaning) { + /* + * Someone else is cleaning this page in place.as + * In theory, we should be able to proceed and use this + * page but they'll probably end up clearing the "busy" + * bit on it in upl_commit_range() but they didn't set + * it, so they would clear our "busy" bit and open + * us to race conditions. + * We'd better wait for the cleaning to complete and + * then try again. + */ + vm_object_iopl_request_sleep_for_cleaning++; + PAGE_SLEEP(object, dst_page, THREAD_UNINT); + continue; + } + if ( (cntrl_flags & UPL_NEED_32BIT_ADDR) && + dst_page->phys_page >= (max_valid_dma_address >> PAGE_SHIFT) ) { + vm_page_t low_page; + int refmod; + + /* + * support devices that can't DMA above 32 bits + * by substituting pages from a pool of low address + * memory for any pages we find above the 4G mark + * can't substitute if the page is already wired because + * we don't know whether that physical address has been + * handed out to some other 64 bit capable DMA device to use + */ + if (VM_PAGE_WIRED(dst_page)) { + ret = KERN_PROTECTION_FAILURE; + goto return_err; + } + low_page = vm_page_grablo(); + + if (low_page == VM_PAGE_NULL) { + ret = KERN_RESOURCE_SHORTAGE; + goto return_err; + } + /* + * from here until the vm_page_replace completes + * we musn't drop the object lock... we don't + * want anyone refaulting this page in and using + * 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->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; + + if (refmod & VM_MEM_REFERENCED) + low_page->reference = TRUE; + if (refmod & VM_MEM_MODIFIED) + low_page->dirty = TRUE; + + vm_page_replace(low_page, object, dst_offset); + + dst_page = low_page; + /* + * vm_page_grablo returned the page marked + * 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->busy) + dwp->dw_mask |= DW_vm_page_wire; if (cntrl_flags & UPL_BLOCK_ACCESS) { /* @@ -4990,76 +5880,82 @@ vm_object_iopl_request( assert(!dst_page->fictitious); dst_page->busy = TRUE; } + /* + * expect the page to be used + * page queues lock must be held to set 'reference' + */ + dwp->dw_mask |= DW_set_reference; + + if (!(cntrl_flags & UPL_COPYOUT_FROM)) + dst_page->dirty = TRUE; +record_phys_addr: + if (dst_page->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); + + if (dst_page->phys_page > upl->highest_page) + upl->highest_page = dst_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; + 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 (object != kernel_object) { + /* + * someone is explicitly grabbing this page... + * update clustered and speculative state + * + */ + VM_PAGE_CONSUME_CLUSTERED(dst_page); + } + entry++; + dst_offset += PAGE_SIZE_64; + xfer_size -= PAGE_SIZE; - if (upl_ptr) { - if (cntrl_flags & UPL_SET_LITE) { - int pg_num; - pg_num = (dst_offset-offset)/PAGE_SIZE; - lite_list[pg_num>>5] |= 1 << (pg_num & 31); - } else { + if (dwp->dw_mask) { + if (dst_page->busy == FALSE) { /* - * 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; - alias_page->phys_page = dst_page->phys_page; - vm_page_wire(alias_page); - - vm_page_insert(alias_page, - upl->map_object, size - xfer_size); - assert(!alias_page->wanted); - alias_page->busy = FALSE; - alias_page->absent = FALSE; + * dw_do_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. + */ + dst_page->busy = TRUE; + dwp->dw_mask |= (DW_clear_busy | DW_PAGE_WAKEUP); } + dwp->dw_m = dst_page; + dwp++; + dw_count++; - /* expect the page to be used */ - dst_page->reference = TRUE; - - if (!(cntrl_flags & UPL_COPYOUT_FROM)) - dst_page->dirty = TRUE; - alias_page = NULL; - - if (user_page_list) { - user_page_list[entry].phys_addr - = dst_page->phys_page; - user_page_list[entry].dirty = - dst_page->dirty; - user_page_list[entry].pageout = - dst_page->pageout; - user_page_list[entry].absent = - dst_page->absent; - user_page_list[entry].precious = - dst_page->precious; + if (dw_count >= DELAYED_WORK_LIMIT) { + dw_do_work(object, &dw_array[0], dw_count); + + dwp = &dw_array[0]; + dw_count = 0; } } - if (delayed_unlock++ > DELAYED_UNLOCK_LIMIT) { - delayed_unlock = 0; - vm_page_unlock_queues(); - } - entry++; - dst_offset += PAGE_SIZE_64; - xfer_size -= PAGE_SIZE; } - if (delayed_unlock) - vm_page_unlock_queues(); + if (dw_count) + dw_do_work(object, &dw_array[0], dw_count); - if (upl->flags & UPL_INTERNAL) { - if(page_list_count != NULL) + if (page_list_count != NULL) { + if (upl->flags & UPL_INTERNAL) *page_list_count = 0; - } else if (*page_list_count > entry) { - if(page_list_count != NULL) + else if (*page_list_count > entry) *page_list_count = entry; } - - if (alias_page != NULL) { - vm_page_lock_queues(); - vm_page_free(alias_page); - vm_page_unlock_queues(); - } - vm_object_unlock(object); if (cntrl_flags & UPL_BLOCK_ACCESS) { @@ -5071,9 +5967,74 @@ vm_object_iopl_request( */ vm_object_pmap_protect(object, offset, (vm_object_size_t)size, PMAP_NULL, 0, VM_PROT_NONE); + assert(!object->blocked_access); + object->blocked_access = TRUE; } - return KERN_SUCCESS; + +return_err: + dw_index = 0; + + for (; offset < dst_offset; offset += PAGE_SIZE) { + boolean_t need_unwire; + + dst_page = vm_page_lookup(object, offset); + + 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 + * 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 + * what the previous state was and we won't get here + * under any normal circumstances... we will always + * clear BUSY and wakeup any waiters via vm_page_free + * or PAGE_WAKEUP_DONE + */ + need_unwire = TRUE; + + if (dw_count) { + if (dw_array[dw_index].dw_m == dst_page) { + /* + * still in the deferred work list + * which means we haven't yet called + * vm_page_wire on this page + */ + need_unwire = FALSE; + + dw_index++; + dw_count--; + } + } + vm_page_lock_queues(); + + if (dst_page->absent) { + vm_page_free(dst_page); + + need_unwire = FALSE; + } else { + if (need_unwire == TRUE) + vm_page_unwire(dst_page, TRUE); + + PAGE_WAKEUP_DONE(dst_page); + } + vm_page_unlock_queues(); + + if (need_unwire == TRUE) + VM_STAT_INCR(reactivations); + } +#if UPL_DEBUG + upl->upl_state = 2; +#endif + if (! (upl->flags & UPL_KERNEL_OBJECT)) { + vm_object_activity_end(object); + } + vm_object_unlock(object); + upl_destroy(upl); + + return ret; } kern_return_t @@ -5085,7 +6046,7 @@ upl_transpose( boolean_t upls_locked; vm_object_t object1, object2; - if (upl1 == UPL_NULL || upl2 == UPL_NULL || upl1 == upl2) { + 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; } @@ -5130,8 +6091,16 @@ upl_transpose( * 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); +#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); +#endif } done: @@ -5195,12 +6164,46 @@ decl_simple_lock_data(,vm_paging_lock) 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; +void +vm_paging_map_init(void) +{ + kern_return_t kr; + vm_map_offset_t page_map_offset; + vm_map_entry_t map_entry; + + assert(vm_paging_base_address == 0); + + /* + * Initialize our pool of pre-allocated kernel + * virtual addresses. + */ + page_map_offset = 0; + kr = vm_map_find_space(kernel_map, + &page_map_offset, + VM_PAGING_NUM_PAGES * PAGE_SIZE, + 0, + 0, + &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; + vm_object_reference(kernel_object); + vm_map_unlock(kernel_map); + + assert(vm_paging_base_address == 0); + vm_paging_base_address = page_map_offset; +} + /* * ENCRYPTED SWAP: * vm_paging_map_object: @@ -5209,7 +6212,12 @@ unsigned long vm_paging_pages_mapped_slow = 0; * kernel virtual addresses, if possible. * Context: * The VM object is locked. This lock will get - * dropped and re-acquired though. + * 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 + * it from being reclaimed. */ kern_return_t vm_paging_map_object( @@ -5217,79 +6225,63 @@ vm_paging_map_object( vm_page_t page, vm_object_t object, vm_object_offset_t offset, - vm_map_size_t *size) + vm_map_size_t *size, + vm_prot_t protection, + boolean_t can_unlock_object) { kern_return_t kr; vm_map_offset_t page_map_offset; vm_map_size_t map_size; vm_object_offset_t object_offset; -#ifdef __ppc__ int i; - vm_map_entry_t map_entry; -#endif /* __ppc__ */ - -#ifdef __ppc__ + if (page != VM_PAGE_NULL && *size == PAGE_SIZE) { + assert(page->busy); /* - * Optimization for the PowerPC. * Use one of the pre-allocated kernel virtual addresses * and just enter the VM page in the kernel address space * at that virtual address. */ - vm_object_unlock(object); simple_lock(&vm_paging_lock); - if (vm_paging_base_address == 0) { - /* - * Initialize our pool of pre-allocated kernel - * virtual addresses. - */ - simple_unlock(&vm_paging_lock); - page_map_offset = 0; - kr = vm_map_find_space(kernel_map, - &page_map_offset, - VM_PAGING_NUM_PAGES * PAGE_SIZE, - 0, - &map_entry); - if (kr != KERN_SUCCESS) { - panic("vm_paging_map_object: " - "kernel_map full\n"); - } - map_entry->object.vm_object = kernel_object; - map_entry->offset = - page_map_offset - VM_MIN_KERNEL_ADDRESS; - vm_object_reference(kernel_object); - vm_map_unlock(kernel_map); - - simple_lock(&vm_paging_lock); - if (vm_paging_base_address != 0) { - /* someone raced us and won: undo */ - simple_unlock(&vm_paging_lock); - kr = vm_map_remove(kernel_map, - page_map_offset, - page_map_offset + - (VM_PAGING_NUM_PAGES - * PAGE_SIZE), - VM_MAP_NO_FLAGS); - assert(kr == KERN_SUCCESS); - simple_lock(&vm_paging_lock); - } else { - vm_paging_base_address = page_map_offset; - } - } - /* * Try and find an available kernel virtual address * from our pre-allocated pool. */ page_map_offset = 0; - 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); + for (;;) { + 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); + break; + } + } + if (page_map_offset != 0) { + /* found a space to map our page ! */ + break; + } + + if (can_unlock_object) { + /* + * If we can afford to unlock the VM object, + * let's take the slow path now... + */ break; } + /* + * We can't afford to unlock the VM object, so + * let's wait for a space to become available... + */ + vm_paging_page_waiter_total++; + vm_paging_page_waiter++; + thread_sleep_fast_usimple_lock(&vm_paging_page_waiter, + &vm_paging_lock, + THREAD_UNINT); + vm_paging_page_waiter--; + /* ... and try again */ } if (page_map_offset != 0) { @@ -5302,18 +6294,28 @@ vm_paging_map_object( } vm_paging_page_inuse[i] = TRUE; simple_unlock(&vm_paging_lock); - pmap_map_block(kernel_pmap, - page_map_offset, - page->phys_page, - PAGE_SIZE, - VM_PROT_DEFAULT, - ((int) page->object->wimg_bits & - VM_WIMG_MASK), - 0); + + if (page->pmapped == FALSE) { + pmap_sync_page_data_phys(page->phys_page); + } + page->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 + * vm_object_pmap_protect() call... + */ + PMAP_ENTER(kernel_pmap, + page_map_offset, + page, + protection, + ((int) page->object->wimg_bits & + VM_WIMG_MASK), + TRUE); vm_paging_objects_mapped++; vm_paging_pages_mapped++; *address = page_map_offset; - vm_object_lock(object); /* all done and mapped, ready to use ! */ return KERN_SUCCESS; @@ -5326,9 +6328,11 @@ vm_paging_map_object( */ vm_paging_no_kernel_page++; simple_unlock(&vm_paging_lock); - vm_object_lock(object); } -#endif /* __ppc__ */ + + if (! can_unlock_object) { + return KERN_NOT_SUPPORTED; + } object_offset = vm_object_trunc_page(offset); map_size = vm_map_round_page(*size); @@ -5338,13 +6342,6 @@ vm_paging_map_object( * in the kernel_map */ - /* don't go beyond the object's end... */ - if (object_offset >= object->size) { - map_size = 0; - } else if (map_size > object->size - offset) { - map_size = object->size - offset; - } - vm_object_reference_locked(object); /* for the map entry */ vm_object_unlock(object); @@ -5356,13 +6353,14 @@ vm_paging_map_object( object, object_offset, FALSE, - VM_PROT_DEFAULT, + protection, VM_PROT_ALL, VM_INHERIT_NONE); if (kr != KERN_SUCCESS) { *address = 0; *size = 0; vm_object_deallocate(object); /* for the map entry */ + vm_object_lock(object); return kr; } @@ -5372,6 +6370,13 @@ vm_paging_map_object( * Enter the mapped pages in the page table now. */ vm_object_lock(object); + /* + * VM object must be kept locked from before PMAP_ENTER() + * until after the kernel is done accessing the page(s). + * Otherwise, the pmap mappings in the kernel could be + * undone by a call to vm_object_pmap_protect(). + */ + for (page_map_offset = 0; map_size != 0; map_size -= PAGE_SIZE_64, page_map_offset += PAGE_SIZE_64) { @@ -5379,23 +6384,33 @@ vm_paging_map_object( page = vm_page_lookup(object, offset + page_map_offset); if (page == VM_PAGE_NULL) { - panic("vm_paging_map_object: no page !?"); + printf("vm_paging_map_object: no page !?"); + vm_object_unlock(object); + kr = vm_map_remove(kernel_map, *address, *size, + VM_MAP_NO_FLAGS); + assert(kr == KERN_SUCCESS); + *address = 0; + *size = 0; + vm_object_lock(object); + return KERN_MEMORY_ERROR; } - if (page->no_isync == TRUE) { + if (page->pmapped == FALSE) { pmap_sync_page_data_phys(page->phys_page); } + page->pmapped = TRUE; cache_attr = ((unsigned int) object->wimg_bits) & VM_WIMG_MASK; + //assert(pmap_verify_free(page->phys_page)); PMAP_ENTER(kernel_pmap, *address + page_map_offset, page, - VM_PROT_DEFAULT, + protection, cache_attr, - FALSE); + TRUE); } vm_paging_objects_mapped_slow++; - vm_paging_pages_mapped_slow += map_size / PAGE_SIZE_64; + vm_paging_pages_mapped_slow += (unsigned long) (map_size / PAGE_SIZE_64); return KERN_SUCCESS; } @@ -5416,14 +6431,12 @@ vm_paging_unmap_object( vm_map_offset_t end) { kern_return_t kr; -#ifdef __ppc__ int i; -#endif /* __ppc__ */ - if ((vm_paging_base_address != 0) && - ((start < vm_paging_base_address) || - (end > (vm_paging_base_address - + (VM_PAGING_NUM_PAGES * PAGE_SIZE))))) { + if ((vm_paging_base_address == 0) || + (start < vm_paging_base_address) || + (end > (vm_paging_base_address + + (VM_PAGING_NUM_PAGES * PAGE_SIZE)))) { /* * We didn't use our pre-allocated pool of * kernel virtual address. Deallocate the @@ -5443,20 +6456,23 @@ vm_paging_unmap_object( * pre-allocated pool. Put it back in the pool * for next time. */ -#ifdef __ppc__ assert(end - start == PAGE_SIZE); - i = (start - vm_paging_base_address) >> PAGE_SHIFT; + i = (int) ((start - vm_paging_base_address) >> PAGE_SHIFT); + assert(i >= 0 && i < VM_PAGING_NUM_PAGES); /* undo the pmap mapping */ - mapping_remove(kernel_pmap, start); + pmap_remove(kernel_pmap, start, end); simple_lock(&vm_paging_lock); vm_paging_page_inuse[i] = FALSE; + if (vm_paging_page_waiter) { + thread_wakeup(&vm_paging_page_waiter); + } simple_unlock(&vm_paging_lock); -#endif /* __ppc__ */ } } +#if CRYPTO /* * Encryption data. * "iv" is the "initial vector". Ideally, we want to @@ -5476,8 +6492,6 @@ unsigned char swap_crypt_test_page_encrypt[4096] __attribute__((aligned(4096))); unsigned char swap_crypt_test_page_decrypt[4096] __attribute__((aligned(4096))); #endif /* DEBUG */ -extern u_long random(void); - /* * Initialize the encryption context: key and key size. */ @@ -5580,10 +6594,7 @@ vm_page_encrypt( vm_page_t page, vm_map_offset_t kernel_mapping_offset) { - int clear_refmod = 0; kern_return_t kr; - boolean_t page_was_referenced; - boolean_t page_was_modified; vm_map_size_t kernel_mapping_size; vm_offset_t kernel_vaddr; union { @@ -5611,15 +6622,11 @@ vm_page_encrypt( ASSERT_PAGE_DECRYPTED(page); /* - * Gather the "reference" and "modified" status of the page. - * We'll restore these values after the encryption, so that - * the encryption is transparent to the rest of the system - * and doesn't impact the VM's LRU logic. + * 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)... */ - page_was_referenced = - (page->reference || pmap_is_referenced(page->phys_page)); - page_was_modified = - (page->dirty || pmap_is_modified(page->phys_page)); + vm_object_paging_begin(page->object); if (kernel_mapping_offset == 0) { /* @@ -5632,7 +6639,9 @@ vm_page_encrypt( page, page->object, page->offset, - &kernel_mapping_size); + &kernel_mapping_size, + VM_PROT_READ | VM_PROT_WRITE, + FALSE); if (kr != KERN_SUCCESS) { panic("vm_page_encrypt: " "could not map page in kernel: 0x%x\n", @@ -5660,8 +6669,6 @@ vm_page_encrypt( encrypt_iv.vm.paging_offset = page->object->paging_offset + page->offset; - vm_object_unlock(page->object); - /* encrypt the "initial vector" */ aes_encrypt_cbc((const unsigned char *) &encrypt_iv.aes_iv[0], swap_crypt_null_iv, @@ -5680,8 +6687,6 @@ vm_page_encrypt( vm_page_encrypt_counter++; - vm_object_lock(page->object); - /* * Unmap the page from the kernel's address space, * if we had to map it ourselves. Otherwise, let @@ -5694,22 +6699,20 @@ vm_page_encrypt( } /* - * Restore the "reference" and "modified" bits. + * 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()). */ - if (! page_was_referenced) { - clear_refmod |= VM_MEM_REFERENCED; - page->reference = FALSE; - } - if (! page_was_modified) { - clear_refmod |= VM_MEM_MODIFIED; - page->dirty = FALSE; - } - if (clear_refmod) - pmap_clear_refmod(page->phys_page, clear_refmod); + pmap_clear_refmod(page->phys_page, VM_MEM_REFERENCED | VM_MEM_MODIFIED); page->encrypted = TRUE; + + vm_object_paging_end(page->object); } /* @@ -5729,11 +6732,9 @@ vm_page_decrypt( vm_page_t page, vm_map_offset_t kernel_mapping_offset) { - int clear_refmod = 0; kern_return_t kr; vm_map_size_t kernel_mapping_size; vm_offset_t kernel_vaddr; - boolean_t page_was_referenced; union { unsigned char aes_iv[AES_BLOCK_SIZE]; struct { @@ -5746,13 +6747,11 @@ vm_page_decrypt( assert(page->encrypted); /* - * Gather the "reference" status of the page. - * We'll restore its value after the decryption, so that - * the decryption is transparent to the rest of the system - * and doesn't impact the VM's LRU logic. + * 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)... */ - page_was_referenced = - (page->reference || pmap_is_referenced(page->phys_page)); + vm_object_paging_begin(page->object); if (kernel_mapping_offset == 0) { /* @@ -5765,10 +6764,13 @@ vm_page_decrypt( page, page->object, page->offset, - &kernel_mapping_size); + &kernel_mapping_size, + VM_PROT_READ | VM_PROT_WRITE, + FALSE); if (kr != KERN_SUCCESS) { panic("vm_page_decrypt: " - "could not map page in kernel: 0x%x\n"); + "could not map page in kernel: 0x%x\n", + kr); } } else { kernel_mapping_size = 0; @@ -5787,8 +6789,6 @@ vm_page_decrypt( decrypt_iv.vm.paging_offset = page->object->paging_offset + page->offset; - vm_object_unlock(page->object); - /* encrypt the "initial vector" */ aes_encrypt_cbc((const unsigned char *) &decrypt_iv.aes_iv[0], swap_crypt_null_iv, @@ -5806,8 +6806,6 @@ vm_page_decrypt( &swap_crypt_ctx.decrypt); vm_page_decrypt_counter++; - vm_object_lock(page->object); - /* * Unmap the page from the kernel's address space, * if we had to map it ourselves. Otherwise, let @@ -5827,15 +6825,8 @@ vm_page_decrypt( * and the decryption doesn't count. */ page->dirty = FALSE; - clear_refmod = VM_MEM_MODIFIED; - - /* restore the "reference" bit */ - if (! page_was_referenced) { - page->reference = FALSE; - clear_refmod |= VM_MEM_REFERENCED; - } - pmap_clear_refmod(page->phys_page, clear_refmod); - + assert (page->cs_validated == FALSE); + pmap_clear_refmod(page->phys_page, VM_MEM_MODIFIED | VM_MEM_REFERENCED); page->encrypted = FALSE; /* @@ -5845,20 +6836,24 @@ vm_page_decrypt( * 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_data_phys(page->phys_page); + 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 "no_isync" being set, so that the - * caches get syncrhonized when the page is first mapped. So we need - * to set "no_isync" here too, despite the fact that we just - * synchronized the caches above... + * that page. That code relies on "pmapped" being FALSE, so that the + * caches get synchronized when the page is first mapped. */ - page->no_isync = TRUE; + 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: @@ -5873,26 +6868,40 @@ upl_encrypt( upl_offset_t crypt_offset, upl_size_t crypt_size) { - upl_size_t upl_size; - upl_offset_t upl_offset; + 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; - - upl_lock(upl); - +#endif upl_object = upl->map_object; upl_offset = upl->offset; upl_size = upl->size; - upl_unlock(upl); - vm_object_lock(upl_object); /* @@ -5916,79 +6925,469 @@ upl_encrypt( paging_offset = shadow_object->paging_offset; vm_object_paging_begin(shadow_object); - if (shadow_object != upl_object) { - vm_object_unlock(shadow_object); - } - vm_object_unlock(upl_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; - /* - * Unmap the pages, so that nobody can continue accessing them while - * they're encrypted. After that point, all accesses to these pages - * will cause a page fault and block while the page is being encrypted - * (busy). After the encryption completes, any access will cause a - * page fault and the page gets decrypted at that time. - */ - assert(crypt_offset + crypt_size <= upl_size); - vm_object_pmap_protect(shadow_object, - base_offset, - (vm_object_size_t)crypt_size, - PMAP_NULL, - 0, - VM_PROT_NONE); - /* XXX FBDP could the object have changed significantly here ? */ - vm_object_lock(shadow_object); + assert(crypt_offset + crypt_size <= upl_size); - for (upl_offset = 0; - upl_offset < crypt_size; - upl_offset += PAGE_SIZE) { + for (offset_in_upl = 0; + offset_in_upl < crypt_size; + offset_in_upl += PAGE_SIZE) { page = vm_page_lookup(shadow_object, - base_offset + upl_offset); + base_offset + offset_in_upl); if (page == VM_PAGE_NULL) { panic("upl_encrypt: " "no page for (obj=%p,off=%lld+%d)!\n", shadow_object, base_offset, - upl_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; } -vm_size_t -upl_get_internal_pagelist_offset(void) +#else /* CRYPTO */ +void +upl_encrypt( + __unused upl_t upl, + __unused upl_offset_t crypt_offset, + __unused upl_size_t crypt_size) { - return sizeof(struct upl); } void -upl_set_dirty( - upl_t upl) +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 */ + +void +vm_pageout_queue_steal(vm_page_t page, boolean_t queues_locked) +{ + boolean_t pageout; + + pageout = page->pageout; + + page->list_req_pending = FALSE; + page->cleaning = FALSE; + page->pageout = FALSE; + + if (!queues_locked) { + vm_page_lockspin_queues(); + } + + /* + * need to drop the laundry count... + * we may also need to remove it + * from the I/O paging queue... + * vm_pageout_throttle_up handles both cases + * + * the laundry and pageout_queue flags are cleared... + */ + vm_pageout_throttle_up(page); + + if (pageout == TRUE) { + /* + * toss the wire count we picked up + * when we intially set this page up + * to be cleaned... + */ + vm_page_unwire(page, TRUE); + } + 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; + vector_upl_t vector_upl = (vector_upl_t)kalloc(vector_upl_size); + + upl = upl_create(0,UPL_VECTOR,0); + upl->vector_upl = vector_upl; + upl->offset = upl_offset; + vector_upl->size = 0; + vector_upl->offset = upl_offset; + vector_upl->invalid_upls=0; + vector_upl->num_upls=0; + vector_upl->pagelist = NULL; + + 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) { - upl->flags |= UPL_CLEAR_DIRTY; + if(upl) { + vector_upl_t vector_upl = upl->vector_upl; + 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; + 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)0xdeadbeef; + } + else + panic("vector_upl_deallocate was passed a non-vectored upl\n"); + } + 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)) { + vector_upl_t vector_upl = upl->vector_upl; + if(vector_upl == NULL || vector_upl == (vector_upl_t)0xdeadbeef || vector_upl == (vector_upl_t)0xfeedbeef) + return FALSE; + else + return TRUE; + } + return FALSE; +} + +boolean_t +vector_upl_set_subupl(upl_t upl,upl_t subupl, uint32_t io_size) +{ + 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) + 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) + break; + } + 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) + return TRUE; + else + return FALSE; + } + } + else + panic("vector_upl_set_subupl was passed a NULL upl element\n"); + } + else + panic("vector_upl_set_subupl was passed a non-vectored upl\n"); + } + 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; + vector_upl_t vector_upl = upl->vector_upl; + + 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; + 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) + upl->highest_page = vector_upl->upl_elems[i]->highest_page; + } + 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 + 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)) { + vector_upl_t vector_upl = upl->vector_upl; + if(vector_upl) { + if(index < vector_upl->num_upls) + return vector_upl->upl_elems[index]; + } + 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; + vector_upl_t vector_upl = upl->vector_upl; + + if(vector_upl) { + upl_t subupl = NULL; + vector_upl_iostates_t subupl_state; + + 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)) { + /* 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) + return NULL; + 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) + *upl_size = subupl_state.size; + } + if(*upl_offset >= subupl_state.offset) + *upl_offset -= subupl_state.offset; + else if(i) + panic("Vector UPL offset miscalculation\n"); + return subupl; + } + } + } + else + panic("vector_upl_subupl_byoffset was passed a non-vectored UPL\n"); + } + return NULL; +} + +void +vector_upl_get_submap(upl_t upl, vm_map_t *v_upl_submap, vm_offset_t *submap_dst_addr) +{ + *v_upl_submap = NULL; + + if(vector_upl_is_valid(upl)) { + vector_upl_t vector_upl = upl->vector_upl; + if(vector_upl) { + *v_upl_submap = vector_upl->submap; + *submap_dst_addr = vector_upl->submap_dst_addr; + } + else + panic("vector_upl_get_submap was passed a non-vectored UPL\n"); + } + 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)) { + vector_upl_t vector_upl = upl->vector_upl; + if(vector_upl) { + vector_upl->submap = submap; + vector_upl->submap_dst_addr = submap_dst_addr; + } + else + panic("vector_upl_get_submap was passed a non-vectored UPL\n"); + } + 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)) { + 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) + break; + } + + 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) + size = PAGE_SIZE; + vector_upl->upl_iostates[i].size = size; + } + else + panic("vector_upl_set_iostate was passed a non-vectored UPL\n"); + } + 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)) { + 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) + break; + } + + 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 + panic("vector_upl_get_iostate was passed a non-vectored UPL\n"); + } + 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)) { + vector_upl_t vector_upl = upl->vector_upl; + if(vector_upl) { + if(index < vector_upl->num_upls) { + *offset = vector_upl->upl_iostates[index].offset; + *size = vector_upl->upl_iostates[index].size; + } + else + *offset = *size = 0; + } + else + panic("vector_upl_get_iostate_byindex was passed a non-vectored UPL\n"); + } + else + panic("vector_upl_get_iostate_byindex was passed a NULL UPL\n"); +} + +upl_page_info_t * +upl_get_internal_vectorupl_pagelist(upl_t upl) +{ + return ((vector_upl_t)(upl->vector_upl))->pagelist; +} + +void * +upl_get_internal_vectorupl(upl_t upl) +{ + return upl->vector_upl; +} + +vm_size_t +upl_get_internal_pagelist_offset(void) +{ + return sizeof(struct upl); } void upl_clear_dirty( - upl_t upl) + upl_t upl, + boolean_t value) { - upl->flags &= ~UPL_CLEAR_DIRTY; + if (value) { + upl->flags |= UPL_CLEAR_DIRTY; + } else { + upl->flags &= ~UPL_CLEAR_DIRTY; + } } #ifdef MACH_BSD +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_PAGE_PRESENT(upl, index)); } +boolean_t upl_speculative_page(upl_page_info_t *upl, int index) +{ + return(UPL_SPECULATIVE_PAGE(upl, index)); +} boolean_t upl_dirty_page(upl_page_info_t *upl, int index) { return(UPL_DIRTY_PAGE(upl, index)); @@ -6002,6 +7401,7 @@ ppnum_t upl_phys_page(upl_page_info_t *upl, int index) return(UPL_PHYS_PAGE(upl, index)); } + void vm_countdirtypages(void) { @@ -6031,6 +7431,21 @@ vm_countdirtypages(void) } while (!queue_end(&vm_page_queue_inactive,(queue_entry_t) m)); vm_page_unlock_queues(); + vm_page_lock_queues(); + m = (vm_page_t) queue_first(&vm_page_queue_throttled); + do { + 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)); + vm_page_unlock_queues(); + vm_page_lock_queues(); m = (vm_page_t) queue_first(&vm_page_queue_zf); do { @@ -6074,14 +7489,26 @@ vm_countdirtypages(void) } #endif /* MACH_BSD */ -#ifdef UPL_DEBUG -kern_return_t upl_ubc_alias_set(upl_t upl, unsigned int alias1, unsigned int alias2) +ppnum_t upl_get_highest_page( + upl_t upl) +{ + return upl->highest_page; +} + +upl_size_t upl_get_size( + upl_t upl) +{ + return upl->size; +} + +#if UPL_DEBUG +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, unsigned int * al, unsigned int * al2) +int upl_ubc_alias_get(upl_t upl, uintptr_t * al, uintptr_t * al2) { if(al) *al = upl->ubc_alias1;