/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.
*
* @APPLE_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.
+ * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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. 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@
*/
#include <kern/thread.h>
#include <kern/xpr.h>
#include <vm/pmap.h>
+#include <vm/vm_fault.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <machine/vm_tuning.h>
#include <kern/misc_protos.h>
+
extern ipc_port_t memory_manager_default;
#ifndef VM_PAGE_LAUNDRY_MAX
-#define VM_PAGE_LAUNDRY_MAX 6 /* outstanding DMM page cleans */
+#define VM_PAGE_LAUNDRY_MAX 16 /* outstanding DMM+EMM page cleans */
#endif /* VM_PAGEOUT_LAUNDRY_MAX */
#ifndef VM_PAGEOUT_BURST_MAX
-#define VM_PAGEOUT_BURST_MAX 32 /* simultaneous EMM page cleans */
+#define VM_PAGEOUT_BURST_MAX 6 /* simultaneous EMM page cleans */
#endif /* VM_PAGEOUT_BURST_MAX */
-#ifndef VM_PAGEOUT_DISCARD_MAX
-#define VM_PAGEOUT_DISCARD_MAX 68 /* simultaneous EMM page cleans */
-#endif /* VM_PAGEOUT_DISCARD_MAX */
-
#ifndef VM_PAGEOUT_BURST_WAIT
#define VM_PAGEOUT_BURST_WAIT 30 /* milliseconds per page */
#endif /* VM_PAGEOUT_BURST_WAIT */
#ifndef VM_PAGE_FREE_RESERVED
#define VM_PAGE_FREE_RESERVED \
- ((16 * VM_PAGE_LAUNDRY_MAX) + NCPUS)
+ ((6 * VM_PAGE_LAUNDRY_MAX) + NCPUS)
#endif /* VM_PAGE_FREE_RESERVED */
/*
unsigned int vm_page_laundry_max = 0; /* # of clusters outstanding */
unsigned int vm_page_laundry_min = 0;
+unsigned int vm_pageout_empty_wait = 0; /* milliseconds */
unsigned int vm_pageout_burst_max = 0;
unsigned int vm_pageout_burst_wait = 0; /* milliseconds per page */
-unsigned int vm_pageout_empty_wait = 0; /* milliseconds */
unsigned int vm_pageout_burst_min = 0;
+unsigned int vm_pageout_burst_loop_throttle = 4096;
unsigned int vm_pageout_pause_count = 0;
unsigned int vm_pageout_pause_max = 0;
unsigned int vm_free_page_pause = 100; /* milliseconds */
unsigned int vm_pageout_scan_inactive_emm_throttle_success = 0; /* debugging */
unsigned int vm_pageout_scan_inactive_emm_throttle_failure = 0; /* debugging */
+/*
+ * Backing store throttle when BS is exhausted
+ */
+unsigned int vm_backing_store_low = 0;
unsigned int vm_pageout_out_of_line = 0;
unsigned int vm_pageout_in_place = 0;
+
+
+/*
+ * Routine: vm_backing_store_disable
+ * Purpose:
+ * Suspend non-privileged threads wishing to extend
+ * backing store when we are low on backing store
+ * (Synchronized by caller)
+ */
+void
+vm_backing_store_disable(
+ boolean_t disable)
+{
+ if(disable) {
+ vm_backing_store_low = 1;
+ } else {
+ if(vm_backing_store_low) {
+ vm_backing_store_low = 0;
+ thread_wakeup((event_t) &vm_backing_store_low);
+ }
+ }
+}
+
+
/*
* Routine: vm_pageout_object_allocate
* Purpose:
assert(object->pager_ready);
- if (object->pager_trusted || object->internal)
- vm_pageout_throttle(m);
-
new_object = vm_object_allocate(size);
if (object->pager_trusted) {
*/
vm_object_lock(object);
vm_object_paging_begin(object);
+ vm_page_lock_queues();
+ vm_pageout_throttle(m);
+ vm_page_unlock_queues();
vm_object_unlock(object);
vm_pageout_in_place++;
vm_object_t object)
{
vm_object_t shadow_object;
+ boolean_t shadow_internal;
/*
* Deal with the deallocation (last reference) of a pageout object
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;
/*
* Handle the trusted pager throttle.
+ * Also decrement the burst throttle (if external).
*/
vm_page_lock_queues();
if (m->laundry) {
+ if (!shadow_internal)
+ vm_page_burst_count--;
vm_page_laundry_count--;
m->laundry = FALSE;
if (vm_page_laundry_count < vm_page_laundry_min) {
* from being dirtied after the pmap_is_modified() call
* returns.
*/
- pmap_page_protect(m->phys_addr, VM_PROT_NONE);
+ pmap_page_protect(m->phys_page, VM_PROT_NONE);
/*
* Since the page is left "dirty" but "not modifed", we
* can detect whether the page was redirtied during
* pageout by checking the modify state.
*/
- m->dirty = pmap_is_modified(m->phys_addr);
+ m->dirty = pmap_is_modified(m->phys_page);
if (m->dirty) {
CLUSTER_STAT(vm_pageout_target_page_dirtied++;)
/* out the pages but handling outside of this code */
/* will take care of resetting dirty. We clear the */
/* modify however for the Programmed I/O case. */
- pmap_clear_modify(m->phys_addr);
+ pmap_clear_modify(m->phys_page);
if(m->absent) {
m->absent = FALSE;
if(shadow_object->absent_count == 1)
* consulted if m->dirty is false.
*/
#if MACH_CLUSTER_STATS
- m->dirty = pmap_is_modified(m->phys_addr);
+ m->dirty = pmap_is_modified(m->phys_page);
if (m->dirty) vm_pageout_cluster_dirtied++;
else vm_pageout_cluster_cleaned++;
}
m->cleaning = FALSE;
-
/*
* Wakeup any thread waiting for the page to be un-cleaning.
*/
/*
* Set up new page to be private shadow of real page.
*/
- new_m->phys_addr = m->phys_addr;
+ new_m->phys_page = m->phys_page;
new_m->fictitious = FALSE;
new_m->pageout = TRUE;
* pageout (indicating that the page should be freed
* when the pageout completes).
*/
- pmap_clear_modify(m->phys_addr);
+ pmap_clear_modify(m->phys_page);
vm_page_lock_queues();
new_m->private = TRUE;
vm_page_wire(new_m);
(integer_t)old_object, m->offset, (integer_t)m,
(integer_t)new_m, new_offset);
- pmap_clear_modify(m->phys_addr);
+ pmap_clear_modify(m->phys_page);
vm_object_paging_begin(old_object);
/*
new_m->fictitious = FALSE;
new_m->private = TRUE;
new_m->pageout = TRUE;
- new_m->phys_addr = m->phys_addr;
+ new_m->phys_page = m->phys_page;
vm_page_wire(new_m);
vm_page_insert(new_m, new_object, new_offset);
assert(!new_m->private && !new_m->fictitious);
- pmap_clear_modify(m->phys_addr);
+ pmap_clear_modify(m->phys_page);
m->busy = TRUE;
vm_object_paging_begin(m->object);
object = m->object;
paging_offset = m->offset + object->paging_offset;
vm_object_paging_begin(object);
- vm_object_unlock(object);
if (m->absent || m->error || m->restart ||
(!m->dirty && !m->precious)) {
VM_PAGE_FREE(m);
panic("reservation without pageout?"); /* alan */
+ vm_object_unlock(object);
return;
}
/* set the page for future call to vm_fault_list_request */
holding_page = NULL;
- vm_object_lock(m->object);
vm_page_lock_queues();
- pmap_clear_modify(m->phys_addr);
+ pmap_clear_modify(m->phys_page);
m->dirty = TRUE;
- m->busy = TRUE;
- m->list_req_pending = TRUE;
- m->cleaning = TRUE;
+ m->busy = TRUE;
+ m->list_req_pending = TRUE;
+ m->cleaning = TRUE;
m->pageout = TRUE;
vm_page_wire(m);
- vm_page_unlock_queues();
- vm_object_unlock(m->object);
vm_pageout_throttle(m);
+ vm_page_unlock_queues();
+ vm_object_unlock(object);
/*
* Write the data to its pager.
* Given a page, page it out, and attempt to clean adjacent pages
* in the same operation.
*
- * The page must be busy, and the object unlocked w/ paging reference
- * to prevent deallocation or collapse. The page must not be on any
- * pageout queue.
+ * The page must be busy, and the object locked. We will take a
+ * paging reference to prevent deallocation or collapse when we
+ * temporarily release the object lock.
+ *
+ * The page must not be on any pageout queue.
*/
void
vm_pageout_cluster(
{
vm_object_t object = m->object;
vm_object_offset_t offset = m->offset; /* from vm_object start */
- vm_object_offset_t paging_offset = m->offset + object->paging_offset;
+ vm_object_offset_t paging_offset;
vm_object_t new_object;
vm_object_offset_t new_offset;
vm_size_t cluster_size;
(integer_t)object, offset, (integer_t)m, 0, 0);
CLUSTER_STAT(vm_pageout_cluster_clusters++;)
+
+ /*
+ * protect the object from collapse -
+ * locking in the object's paging_offset.
+ */
+ vm_object_paging_begin(object);
+ paging_offset = m->offset + object->paging_offset;
+
/*
* Only a certain kind of page is appreciated here.
*/
assert(m->busy && (m->dirty || m->precious) && (m->wire_count == 0));
assert(!m->cleaning && !m->pageout && !m->inactive && !m->active);
- vm_object_lock(object);
cluster_size = object->cluster_size;
assert(cluster_size >= PAGE_SIZE);
if (!object->pager_trusted || !allow_clustered_pageouts)
cluster_size = PAGE_SIZE;
- vm_object_unlock(object);
cluster_offset = paging_offset & (vm_object_offset_t)(cluster_size - 1);
/* bytes from beginning of cluster */
/* set the page for future call to vm_fault_list_request */
holding_page = NULL;
- vm_object_lock(m->object);
vm_page_lock_queues();
- m->busy = TRUE;
- m->list_req_pending = TRUE;
- m->cleaning = TRUE;
+ m->busy = TRUE;
+ m->list_req_pending = TRUE;
+ m->cleaning = TRUE;
m->pageout = TRUE;
vm_page_wire(m);
- vm_page_unlock_queues();
- vm_object_unlock(m->object);
vm_pageout_throttle(m);
+ vm_page_unlock_queues();
+ vm_object_unlock(object);
/*
* Search backward for adjacent eligible pages to clean in
VM_PAGE_FREE(holding_page);
vm_object_paging_end(object);
}
-
- vm_object_unlock(object);
}
/*
* Trusted pager throttle.
- * Object must be unlocked, page queues must be unlocked.
+ * Object and page queues must be locked.
*/
void
vm_pageout_throttle(
register vm_page_t m)
{
- vm_page_lock_queues();
assert(!m->laundry);
m->laundry = TRUE;
while (vm_page_laundry_count >= vm_page_laundry_max) {
assert_wait((event_t) &vm_page_laundry_count, THREAD_UNINT);
vm_page_unlock_queues();
-
+ vm_object_unlock(m->object);
/*
* Pause to let the default pager catch up.
*/
thread_block((void (*)(void)) 0);
+
+ vm_object_lock(m->object);
vm_page_lock_queues();
}
+ if (!m->object->internal)
+ vm_page_burst_count++;
vm_page_laundry_count++;
- vm_page_unlock_queues();
}
/*
assert(!m->private);
assert(!m->fictitious);
- if (!m->dirty) m->dirty = pmap_is_modified(m->phys_addr);
+ if (!m->dirty) m->dirty = pmap_is_modified(m->phys_page);
if (precious_clean) {
if (!m->precious || !m->dirty)
*/
extern void vm_pageout_scan_continue(void); /* forward; */
+#define DELAYED_UNLOCK_LIMIT 50
+#define LOCAL_FREED_LIMIT 50
+
void
vm_pageout_scan(void)
{
- unsigned int burst_count;
boolean_t now = FALSE;
unsigned int laundry_pages;
- boolean_t need_more_inactive_pages;
- unsigned int loop_detect;
+ int loop_count = 0;
+ int loop_bursted_count = 0;
+ int active_loop_detect;
+ vm_page_t local_freeq = 0;
+ int local_freed = 0;
+ int delayed_unlock = 0;
+ int need_internal_inactive = 0;
+ int need_pause;
XPR(XPR_VM_PAGEOUT, "vm_pageout_scan\n", 0, 0, 0, 0, 0);
* When memory is very tight, we can't rely on external pagers to
* clean pages. They probably aren't running, because they
* aren't vm-privileged. If we kept sending dirty pages to them,
- * we could exhaust the free list. However, we can't just ignore
- * pages belonging to external objects, because there might be no
- * pages belonging to internal objects. Hence, we get the page
- * into an internal object and then immediately double-page it,
- * sending it to the default pager.
+ * we could exhaust the free list.
*
* consider_zone_gc should be last, because the other operations
* might return memory to zones.
*/
-
-
Restart:
-#if THREAD_SWAPPER
- mutex_lock(&vm_page_queue_free_lock);
- now = (vm_page_free_count < vm_page_free_min);
- mutex_unlock(&vm_page_queue_free_lock);
-
- swapout_threads(now);
-#endif /* THREAD_SWAPPER */
-
stack_collect();
consider_task_collect();
- consider_thread_collect();
- consider_zone_gc();
consider_machine_collect();
+ consider_zone_gc();
- loop_detect = vm_page_active_count + vm_page_inactive_count;
-#if 0
- if (vm_page_free_count <= vm_page_free_reserved) {
- need_more_inactive_pages = TRUE;
- } else {
- need_more_inactive_pages = FALSE;
- }
-#else
- need_more_inactive_pages = FALSE;
-#endif
-
- for (burst_count = 0;;) {
+ for (;;) {
register vm_page_t m;
register vm_object_t object;
/*
* Recalculate vm_page_inactivate_target.
*/
-
- vm_page_lock_queues();
+ if (delayed_unlock == 0)
+ vm_page_lock_queues();
vm_page_inactive_target =
VM_PAGE_INACTIVE_TARGET(vm_page_active_count +
vm_page_inactive_count);
+ active_loop_detect = 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_loop_detect--) > 0)) {
- while ((vm_page_inactive_count < vm_page_inactive_target ||
- need_more_inactive_pages) &&
- !queue_empty(&vm_page_queue_active)) {
- register vm_object_t object;
-
+ need_pause = 1;
vm_pageout_active++;
+
m = (vm_page_t) queue_first(&vm_page_queue_active);
+ object = m->object;
/*
* If we're getting really low on memory,
- * try selecting a page that will go
+ * or we have already exceed the burst
+ * count for the external pagers,
+ * try skipping to a page that will go
* directly to the default_pager.
- * If there are no such pages, we have to
- * page out a page backed by an EMM,
- * so that the default_pager can recover
- * it eventually.
*/
- if (need_more_inactive_pages &&
- (IP_VALID(memory_manager_default))) {
+ if (need_internal_inactive &&
+ IP_VALID(memory_manager_default)) {
vm_pageout_scan_active_emm_throttle++;
- do {
- assert(m->active && !m->inactive);
- object = m->object;
- if (vm_object_lock_try(object)) {
-#if 0
- if (object->pager_trusted ||
- object->internal) {
- /* found one ! */
- vm_pageout_scan_active_emm_throttle_success++;
- goto object_locked_active;
- }
-#else
- vm_pageout_scan_active_emm_throttle_success++;
- goto object_locked_active;
-#endif
- vm_object_unlock(object);
- }
- m = (vm_page_t) queue_next(&m->pageq);
- } while (!queue_end(&vm_page_queue_active,
- (queue_entry_t) m));
- if (queue_end(&vm_page_queue_active,
- (queue_entry_t) m)) {
- vm_pageout_scan_active_emm_throttle_failure++;
- m = (vm_page_t)
- queue_first(&vm_page_queue_active);
+ assert(m->active && !m->inactive);
+
+ if (vm_object_lock_try(object)) {
+ if (object->internal)
+ goto object_locked_active;
+
+ if (!m->dirty)
+ m->dirty = pmap_is_modified(m->phys_page);
+ if (!m->dirty && !m->precious)
+ goto object_locked_active;
+
+ vm_object_unlock(object);
+
+ need_pause = 0;
}
+ goto object_lock_try_active_failed;
}
-
assert(m->active && !m->inactive);
- object = m->object;
if (!vm_object_lock_try(object)) {
/*
* Move page to end and continue.
*/
-
+object_lock_try_active_failed:
queue_remove(&vm_page_queue_active, m,
vm_page_t, pageq);
queue_enter(&vm_page_queue_active, m,
vm_page_t, pageq);
- vm_page_unlock_queues();
- mutex_pause();
- vm_page_lock_queues();
+ if (local_freeq) {
+ vm_page_free_list(local_freeq);
+
+ local_freeq = 0;
+ local_freed = 0;
+ }
+ if (need_pause) {
+ delayed_unlock = 0;
+
+ vm_page_unlock_queues();
+ mutex_pause();
+ vm_page_lock_queues();
+ }
continue;
}
* can handle that.
*/
+ if (need_internal_inactive) {
+ /* found one ! */
+ vm_pageout_scan_active_emm_throttle_success++;
+ need_internal_inactive--;
+ }
vm_page_deactivate(m);
vm_object_unlock(object);
}
-
/*
* We are done if we have met our target *and*
* nobody is still waiting for a page.
*/
- if (vm_page_free_count >= vm_page_free_target) {
+ if (vm_page_free_count + local_freed >= vm_page_free_target) {
+ if (local_freeq) {
+ vm_page_free_list(local_freeq);
+
+ local_freeq = 0;
+ local_freed = 0;
+ }
+
+ consider_machine_adjust();
+
mutex_lock(&vm_page_queue_free_lock);
+
if ((vm_page_free_count >= vm_page_free_target) &&
(vm_page_free_wanted == 0)) {
+
+ delayed_unlock = 0;
vm_page_unlock_queues();
break;
}
mutex_unlock(&vm_page_queue_free_lock);
}
+
/*
* Sometimes we have to pause:
* 1) No inactive pages - nothing to do.
- * 2) Flow control - wait for untrusted pagers to catch up.
+ * 2) Flow control - nothing but external pages and
+ * we have to wait for untrusted pagers to catch up.
*/
+ loop_count++;
if ((queue_empty(&vm_page_queue_inactive) &&
- (queue_empty(&vm_page_queue_zf))) ||
- ((--loop_detect) == 0) ||
- (burst_count >= vm_pageout_burst_max)) {
+ queue_empty(&vm_page_queue_zf)) ||
+ loop_bursted_count >= vm_pageout_burst_loop_throttle) {
+
unsigned int pages, msecs;
int wait_result;
-
+
consider_machine_adjust();
/*
* vm_pageout_burst_wait is msecs/page.
* If there is nothing for us to do, we wait
* at least vm_pageout_empty_wait msecs.
*/
- pages = burst_count;
+ pages = vm_page_burst_count;
- if (loop_detect == 0) {
+ if (pages) {
+ msecs = pages * vm_pageout_burst_wait;
+ } else {
printf("Warning: No physical memory suitable for pageout or reclaim, pageout thread temporarily going to sleep\n");
msecs = vm_free_page_pause;
}
- else {
- msecs = burst_count * vm_pageout_burst_wait;
- }
if (queue_empty(&vm_page_queue_inactive) &&
queue_empty(&vm_page_queue_zf) &&
(msecs < vm_pageout_empty_wait))
msecs = vm_pageout_empty_wait;
+
+ if (local_freeq) {
+ vm_page_free_list(local_freeq);
+
+ local_freeq = 0;
+ local_freed = 0;
+ }
+ delayed_unlock = 0;
vm_page_unlock_queues();
assert_wait_timeout(msecs, THREAD_INTERRUPTIBLE);
thread_cancel_timer();
vm_pageout_scan_continue();
+ if (loop_count >= vm_page_inactive_count) {
+ if (vm_page_burst_count >= vm_pageout_burst_max) {
+ /*
+ * Make sure we move enough "appropriate"
+ * pages to the inactive queue before trying
+ * again.
+ */
+ need_internal_inactive = vm_page_laundry_max;
+ }
+ loop_count = 0;
+ }
+ loop_bursted_count = 0;
goto Restart;
/*NOTREACHED*/
}
m = (vm_page_t) queue_first(&vm_page_queue_zf);
last_page_zf = 1;
}
+ object = m->object;
+
+ need_pause = 1;
- if ((vm_page_free_count <= vm_page_free_reserved) &&
- (IP_VALID(memory_manager_default))) {
+ if (vm_page_burst_count >= vm_pageout_burst_max &&
+ IP_VALID(memory_manager_default)) {
/*
- * We're really low on memory. Try to select a page that
- * would go directly to the default_pager.
- * If there are no such pages, we have to page out a
- * page backed by an EMM, so that the default_pager
- * can recover it eventually.
+ * We're throttling external pagers.
+ * Try to select a page that would
+ * go directly to the default_pager
+ * or that is clean...
*/
vm_pageout_scan_inactive_emm_throttle++;
- do {
- assert(!m->active && m->inactive);
- object = m->object;
- if (vm_object_lock_try(object)) {
-#if 0
- if (object->pager_trusted ||
- object->internal) {
- /* found one ! */
- vm_pageout_scan_inactive_emm_throttle_success++;
- goto object_locked_inactive;
- }
-#else
- vm_pageout_scan_inactive_emm_throttle_success++;
- goto object_locked_inactive;
-#endif /* 0 */
- vm_object_unlock(object);
- }
- m = (vm_page_t) queue_next(&m->pageq);
- } while ((!queue_end(&vm_page_queue_zf,
- (queue_entry_t) m))
- && (!queue_end(&vm_page_queue_inactive,
- (queue_entry_t) m)));
-
- if ((queue_end(&vm_page_queue_zf,
- (queue_entry_t) m))
- || (queue_end(&vm_page_queue_inactive,
- (queue_entry_t) m))) {
- vm_pageout_scan_inactive_emm_throttle_failure++;
- /*
- * We should check the "active" queue
- * for good candidates to page out.
- */
- need_more_inactive_pages = TRUE;
+ assert(!m->active && m->inactive);
- if(last_page_zf == 0) {
- last_page_zf = 1;
- vm_zf_iterator = vm_zf_iterator_count - 1;
- } else {
- last_page_zf = 0;
- vm_zf_iterator = vm_zf_iterator_count - 2;
+ if (vm_object_lock_try(object)) {
+ if (object->internal) {
+ /* found one ! */
+ vm_pageout_scan_inactive_emm_throttle_success++;
+ goto object_locked_inactive;
}
- vm_page_unlock_queues();
- goto Restart;
+ if (!m->dirty)
+ m->dirty = pmap_is_modified(m->phys_page);
+ if (!m->dirty && !m->precious) {
+ /* found one ! */
+ vm_pageout_scan_inactive_emm_throttle_success++;
+ goto object_locked_inactive;
+ }
+ vm_object_unlock(object);
+
+ need_pause = 0;
}
+ loop_bursted_count++;
+ goto object_lock_try_inactive_failed;
}
assert(!m->active && m->inactive);
- object = m->object;
/*
* Try to lock object; since we've got the
*/
if (!vm_object_lock_try(object)) {
+object_lock_try_inactive_failed:
/*
* Move page to end and continue.
* Don't re-issue ticket
*/
- if(m->zero_fill) {
+ if (m->zero_fill) {
queue_remove(&vm_page_queue_zf, m,
vm_page_t, pageq);
queue_enter(&vm_page_queue_zf, m,
queue_enter(&vm_page_queue_inactive, m,
vm_page_t, pageq);
}
+ if (local_freeq) {
+ vm_page_free_list(local_freeq);
+
+ local_freeq = 0;
+ local_freed = 0;
+ }
+ delayed_unlock = 0;
vm_page_unlock_queues();
- mutex_pause();
- vm_pageout_inactive_nolock++;
+ if (need_pause) {
+ mutex_pause();
+ vm_pageout_inactive_nolock++;
+ }
continue;
}
object_locked_inactive:
/*
- * Paging out pages of objects which pager is being
- * created by another thread must be avoided, because
- * this thread may claim for memory, thus leading to a
- * possible dead lock between it and the pageout thread
- * which will wait for pager creation, if such pages are
- * finally chosen. The remaining assumption is that there
- * will finally be enough available pages in the inactive
- * pool to page out in order to satisfy all memory claimed
- * by the thread which concurrently creates the pager.
+ * Paging out pages of external objects which
+ * are currently being created must be avoided.
+ * The pager may claim for memory, thus leading to a
+ * possible dead lock between it and the pageout thread,
+ * if such pages are finally chosen. The remaining assumption
+ * is that there will finally be enough available pages in the
+ * inactive pool to page out in order to satisfy all memory
+ * claimed by the thread which concurrently creates the pager.
*/
-
if (!object->pager_initialized && object->pager_created) {
/*
* Move page to end and continue, hoping that
last_page_zf = 0;
vm_zf_iterator = 1;
}
- vm_page_unlock_queues();
+ if (delayed_unlock++ > DELAYED_UNLOCK_LIMIT) {
+ delayed_unlock = 0;
+ vm_page_unlock_queues();
+ }
vm_object_unlock(object);
vm_pageout_inactive_avoid++;
continue;
* Leave it off the pageout queues.
*/
- vm_page_unlock_queues();
+ if (delayed_unlock++ > DELAYED_UNLOCK_LIMIT) {
+ delayed_unlock = 0;
+ vm_page_unlock_queues();
+ }
vm_object_unlock(object);
vm_pageout_inactive_busy++;
continue;
if (m->absent || m->error) {
vm_pageout_inactive_absent++;
reclaim_page:
- vm_page_free(m);
- vm_page_unlock_queues();
+
+ if (m->tabled)
+ vm_page_remove(m); /* clears tabled, object, offset */
+ if (m->absent)
+ vm_object_absent_release(object);
+
+ m->pageq.next = (queue_entry_t)local_freeq;
+ local_freeq = m;
+
+ if (local_freed++ > LOCAL_FREED_LIMIT) {
+ vm_page_free_list(local_freeq);
+
+ local_freeq = 0;
+ local_freed = 0;
+ }
+ if (delayed_unlock++ > DELAYED_UNLOCK_LIMIT) {
+ delayed_unlock = 0;
+ vm_page_unlock_queues();
+ }
vm_object_unlock(object);
+ loop_bursted_count = 0;
continue;
}
m->dump_cleaning = TRUE;
vm_page_wire(m);
vm_object_unlock(object);
- vm_page_unlock_queues();
+
+ if (delayed_unlock++ > DELAYED_UNLOCK_LIMIT) {
+ delayed_unlock = 0;
+ vm_page_unlock_queues();
+ }
+ loop_bursted_count = 0;
continue;
}
* (Fictitious pages are either busy or absent.)
*/
- if (m->reference || pmap_is_referenced(m->phys_addr)) {
+ if (m->reference || pmap_is_referenced(m->phys_page)) {
vm_pageout_inactive_used++;
reactivate_page:
#if ADVISORY_PAGEOUT
vm_object_unlock(object);
vm_page_activate(m);
VM_STAT(reactivations++);
- vm_page_unlock_queues();
+
+ if (delayed_unlock++ > DELAYED_UNLOCK_LIMIT) {
+ delayed_unlock = 0;
+ vm_page_unlock_queues();
+ }
continue;
}
vm_stat_discard_throttle++;
#if 0
/* ignore this page and skip to next */
- vm_page_unlock_queues();
+ if (delayed_unlock++ > DELAYED_UNLOCK_LIMIT) {
+ delayed_unlock = 0;
+ vm_page_unlock_queues();
+ }
vm_object_unlock(object);
continue;
#else
VM_STAT(reactivations++);
discard_offset = m->offset + object->paging_offset;
vm_stat_discard_sent++;
- vm_page_unlock_queues();
+
+ if (delayed_unlock++ > DELAYED_UNLOCK_LIMIT) {
+ delayed_unlock = 0;
+ vm_page_unlock_queues();
+ }
vm_object_unlock(object);
/*
*/
m->busy = TRUE;
- pmap_page_protect(m->phys_addr, VM_PROT_NONE);
+
+ if (m->no_isync == FALSE)
+ pmap_page_protect(m->phys_page, VM_PROT_NONE);
if (!m->dirty)
- m->dirty = pmap_is_modified(m->phys_addr);
+ m->dirty = pmap_is_modified(m->phys_page);
/*
* If it's clean and not precious, we can free the page.
*/
vm_pageout_inactive_clean++;
goto reclaim_page;
}
+ if (local_freeq) {
+ vm_page_free_list(local_freeq);
+
+ local_freeq = 0;
+ local_freed = 0;
+ }
+ delayed_unlock = 0;
vm_page_unlock_queues();
/*
*/
if (!object->pager_initialized)
- vm_object_collapse(object);
+ vm_object_collapse(object, (vm_object_offset_t)0);
if (!object->pager_initialized)
vm_object_pager_create(object);
if (!object->pager_initialized) {
* to top of loop and look for suitable pages.
*/
continue;
- }
-
- if ((object->pager_initialized) &&
- (object->pager == MEMORY_OBJECT_NULL)) {
+ } else if (object->pager == MEMORY_OBJECT_NULL) {
/*
* This pager has been destroyed by either
* memory_object_destroy or vm_object_destroy, and
*/
VM_PAGE_FREE(m);
vm_object_unlock(object);
+ loop_bursted_count = 0;
continue;
}
vm_pageout_inactive_dirty++;
-/*
- if (!object->internal)
- burst_count++;
-*/
- vm_object_paging_begin(object);
- vm_object_unlock(object);
vm_pageout_cluster(m); /* flush it */
+ vm_object_unlock(object);
+ loop_bursted_count = 0;
}
- consider_machine_adjust();
}
counter(unsigned int c_vm_pageout_scan_continue = 0;)
* vm_pageout is the high level pageout daemon.
*/
+void
+vm_pageout_continue(void)
+{
+ vm_pageout_scan_event_counter++;
+ vm_pageout_scan();
+ /* we hold vm_page_queue_free_lock now */
+ assert(vm_page_free_wanted == 0);
+ assert_wait((event_t) &vm_page_free_wanted, THREAD_UNINT);
+ mutex_unlock(&vm_page_queue_free_lock);
+
+ counter(c_vm_pageout_block++);
+ thread_block(vm_pageout_continue);
+ /*NOTREACHED*/
+}
void
vm_pageout(void)
* Set thread privileges.
*/
self->vm_privilege = TRUE;
- stack_privilege(self);
s = splsched();
thread_lock(self);
if (vm_pageout_empty_wait == 0)
vm_pageout_empty_wait = VM_PAGEOUT_EMPTY_WAIT;
+ /*
+ * Set kernel task to low backing store privileged
+ * status
+ */
+ task_lock(kernel_task);
+ kernel_task->priv_flags |= VM_BACKING_STORE_PRIV;
+ task_unlock(kernel_task);
+
vm_page_free_count_init = vm_page_free_count;
vm_zf_iterator = 0;
/*
* calling it with an arg of 0 will not change the reserve
* but will re-calculate free_min and free_target
*/
- if (vm_page_free_reserved < VM_PAGE_FREE_RESERVED)
- vm_page_free_reserve(VM_PAGE_FREE_RESERVED - vm_page_free_reserved);
- else
+ if (vm_page_free_reserved < VM_PAGE_FREE_RESERVED) {
+ int scale;
+
+ /*
+ * HFS Journaling exists on the vm_pageout path...
+ * it can need to allocate a lot more memory than a
+ * typical driver/filesystem... if it can't allocate
+ * the transaction buffer(s), we will deadlock...
+ * the amount is scaled
+ * based on the physical footprint of the system, so
+ * let's double our reserve on systems with > 512Mbytes
+ */
+ if (vm_page_free_count > (512 * 1024 * 1024) / PAGE_SIZE)
+ scale = 2;
+ else
+ scale = 1;
+ vm_page_free_reserve((VM_PAGE_FREE_RESERVED * scale) - vm_page_free_reserved);
+ } else
vm_page_free_reserve(0);
- /*
- * vm_pageout_scan will set vm_page_inactive_target.
- *
- * The pageout daemon is never done, so loop forever.
- * We should call vm_pageout_scan at least once each
- * time we are woken, even if vm_page_free_wanted is
- * zero, to check vm_page_free_target and
- * vm_page_inactive_target.
- */
- for (;;) {
- vm_pageout_scan_event_counter++;
- vm_pageout_scan();
- /* we hold vm_page_queue_free_lock now */
- assert(vm_page_free_wanted == 0);
- assert_wait((event_t) &vm_page_free_wanted, THREAD_UNINT);
- mutex_unlock(&vm_page_queue_free_lock);
- counter(c_vm_pageout_block++);
- thread_block((void (*)(void)) 0);
- }
+ vm_pageout_continue();
/*NOTREACHED*/
}
m = (vm_page_t) queue_first(&vm_page_queue_inactive);
while (!queue_end(&vm_page_queue_inactive, (queue_entry_t) m)) {
- if(m->fictitious) {
+
+ object = m->object;
+
+ if ( !vm_object_lock_try(object)) {
m = (vm_page_t) queue_next(&m->pageq);
continue;
}
- if (!m->dirty)
- m->dirty = pmap_is_modified(m->phys_addr);
- if(m->dirty || m->busy || m->wire_count || m->absent
+ if ((!object->alive) || (object->pageout)) {
+ vm_object_unlock(object);
+
+ m = (vm_page_t) queue_next(&m->pageq);
+ continue;
+ }
+ if (m->dirty || m->busy || m->wire_count || m->absent || m->fictitious
|| m->precious || m->cleaning
|| m->dump_cleaning || m->error
|| m->pageout || m->laundry
|| m->list_req_pending
|| m->overwriting) {
+ vm_object_unlock(object);
+
m = (vm_page_t) queue_next(&m->pageq);
continue;
}
- object = m->object;
+ m->busy = TRUE;
+ pmap_page_protect(m->phys_page, VM_PROT_NONE);
+ m->dirty = pmap_is_modified(m->phys_page);
- if (vm_object_lock_try(object)) {
- if((!object->alive) ||
- (object->pageout)) {
- vm_object_unlock(object);
- m = (vm_page_t) queue_next(&m->pageq);
- continue;
- }
- m->busy = TRUE;
- pmap_page_protect(m->phys_addr, VM_PROT_NONE);
- vm_page_free(m);
+ if (m->dirty) {
+ PAGE_WAKEUP_DONE(m);
vm_object_unlock(object);
- vm_page_unlock_queues();
- return KERN_SUCCESS;
+
+ m = (vm_page_t) queue_next(&m->pageq);
+ continue;
}
- m = (vm_page_t) queue_next(&m->pageq);
- }
+ vm_page_free(m);
+ vm_object_unlock(object);
+ vm_page_unlock_queues();
+ return KERN_SUCCESS;
+ }
m = (vm_page_t) queue_first(&vm_page_queue_active);
while (!queue_end(&vm_page_queue_active, (queue_entry_t) m)) {
- if(m->fictitious) {
+
+ object = m->object;
+
+ if ( !vm_object_lock_try(object)) {
m = (vm_page_t) queue_next(&m->pageq);
continue;
}
- if (!m->dirty)
- m->dirty = pmap_is_modified(m->phys_addr);
- if(m->dirty || m->busy || m->wire_count || m->absent
+ if ((!object->alive) || (object->pageout)) {
+ vm_object_unlock(object);
+
+ m = (vm_page_t) queue_next(&m->pageq);
+ continue;
+ }
+ if (m->dirty || m->busy || m->wire_count || m->absent || m->fictitious
|| m->precious || m->cleaning
|| m->dump_cleaning || m->error
|| m->pageout || m->laundry
|| m->list_req_pending
|| m->overwriting) {
+ vm_object_unlock(object);
+
m = (vm_page_t) queue_next(&m->pageq);
continue;
}
- object = m->object;
+ m->busy = TRUE;
+ pmap_page_protect(m->phys_page, VM_PROT_NONE);
+ m->dirty = pmap_is_modified(m->phys_page);
- if (vm_object_lock_try(object)) {
- if((!object->alive) ||
- (object->pageout)) {
- vm_object_unlock(object);
- m = (vm_page_t) queue_next(&m->pageq);
- continue;
- }
- m->busy = TRUE;
- pmap_page_protect(m->phys_addr, VM_PROT_NONE);
- vm_page_free(m);
+ if (m->dirty) {
+ PAGE_WAKEUP_DONE(m);
vm_object_unlock(object);
- vm_page_unlock_queues();
- return KERN_SUCCESS;
+
+ m = (vm_page_t) queue_next(&m->pageq);
+ continue;
}
- m = (vm_page_t) queue_next(&m->pageq);
+ vm_page_free(m);
+ vm_object_unlock(object);
+ vm_page_unlock_queues();
+
+ return KERN_SUCCESS;
}
vm_page_unlock_queues();
+
return KERN_FAILURE;
}
static upl_t
upl_create(
- boolean_t internal,
+ int flags,
vm_size_t size)
{
upl_t upl;
+ int page_field_size; /* bit field in word size buf */
- if(internal) {
+ page_field_size = 0;
+ if (flags & UPL_CREATE_LITE) {
+ page_field_size = ((size/PAGE_SIZE) + 7) >> 3;
+ page_field_size = (page_field_size + 3) & 0xFFFFFFFC;
+ }
+ if(flags & UPL_CREATE_INTERNAL) {
upl = (upl_t)kalloc(sizeof(struct upl)
- + (sizeof(struct upl_page_info)*(size/page_size)));
+ + (sizeof(struct upl_page_info)*(size/PAGE_SIZE))
+ + page_field_size);
} else {
- upl = (upl_t)kalloc(sizeof(struct upl));
+ upl = (upl_t)kalloc(sizeof(struct upl) + page_field_size);
}
upl->flags = 0;
upl->src_object = NULL;
upl_destroy(
upl_t upl)
{
+ int page_field_size; /* bit field in word size buf */
#ifdef UBC_DEBUG
{
upl_t upl_ele;
- vm_object_lock(upl->map_object->shadow);
- queue_iterate(&upl->map_object->shadow->uplq,
- upl_ele, upl_t, uplq) {
+ vm_object_t object;
+ if (upl->map_object->pageout) {
+ 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(&upl->map_object->shadow->uplq,
- upl_ele, upl_t, uplq);
+ queue_remove(&object->uplq,
+ upl_ele, upl_t, uplq);
break;
}
}
- vm_object_unlock(upl->map_object->shadow);
+ vm_object_unlock(object);
}
#endif /* UBC_DEBUG */
-#ifdef notdefcdy
- if(!(upl->flags & UPL_DEVICE_MEMORY))
-#endif
+ /* drop a reference on the map_object whether or */
+ /* not a pageout object is inserted */
+ if(upl->map_object->pageout)
vm_object_deallocate(upl->map_object);
+
+ page_field_size = 0;
+ if (upl->flags & UPL_LITE) {
+ page_field_size = ((upl->size/PAGE_SIZE) + 7) >> 3;
+ page_field_size = (page_field_size + 3) & 0xFFFFFFFC;
+ }
if(upl->flags & UPL_INTERNAL) {
kfree((vm_offset_t)upl,
sizeof(struct upl) +
- (sizeof(struct upl_page_info) * (upl->size/page_size)));
+ (sizeof(struct upl_page_info) * (upl->size/PAGE_SIZE))
+ + page_field_size);
} else {
- kfree((vm_offset_t)upl, sizeof(struct upl));
+ kfree((vm_offset_t)upl, sizeof(struct upl) + page_field_size);
}
}
vm_size_t xfer_size = size;
boolean_t do_m_lock = FALSE;
boolean_t dirty;
+ boolean_t hw_dirty;
upl_t upl = NULL;
int entry;
boolean_t encountered_lrp = FALSE;
vm_page_t alias_page = NULL;
int page_ticket;
-
+ wpl_array_t lite_list;
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(((size/PAGE_SIZE) > MAX_UPL_TRANSFER) && !object->phys_contiguous) {
+ size = MAX_UPL_TRANSFER * PAGE_SIZE;
}
if(cntrl_flags & UPL_SET_INTERNAL)
if((cntrl_flags & UPL_COPYOUT_FROM) && (upl_ptr == NULL)) {
return KERN_SUCCESS;
}
+
if(upl_ptr) {
if(cntrl_flags & UPL_SET_INTERNAL) {
- upl = upl_create(TRUE, size);
- user_page_list = (upl_page_info_t *)
- (((vm_offset_t)upl) + sizeof(struct upl));
- upl->flags |= UPL_INTERNAL;
+ if(cntrl_flags & UPL_SET_LITE) {
+ vm_offset_t page_field_size;
+ upl = upl_create(
+ UPL_CREATE_INTERNAL | UPL_CREATE_LITE,
+ size);
+ user_page_list = (upl_page_info_t *)
+ (((vm_offset_t)upl) + sizeof(struct upl));
+ lite_list = (wpl_array_t)
+ (((vm_offset_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 *)
+ (((vm_offset_t)upl)
+ + sizeof(struct upl));
+ upl->flags = UPL_INTERNAL;
+ }
} else {
- upl = upl_create(FALSE, size);
+ if(cntrl_flags & UPL_SET_LITE) {
+ vm_offset_t page_field_size;
+ upl = upl_create(UPL_CREATE_LITE, size);
+ lite_list = (wpl_array_t)
+ (((vm_offset_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) {
- upl->size = size;
+ 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_lock(object);
+ vm_object_paging_begin(object);
+ vm_object_unlock(object);
+
+ /* 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;
+ (offset + object->shadow_offset)>>12;
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;
+ }
+ }
+ return KERN_SUCCESS;
+ }
+ 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->flags = UPL_DEVICE_MEMORY | UPL_INTERNAL;
upl->map_object->pageout = TRUE;
upl->map_object->can_persist = FALSE;
- upl->map_object->copy_strategy
- = MEMORY_OBJECT_COPY_NONE;
+ 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);
- return KERN_SUCCESS;
}
-
-
- upl->map_object = vm_object_allocate(size);
- vm_object_lock(upl->map_object);
- upl->map_object->shadow = object;
+ }
+ if (!(cntrl_flags & UPL_SET_LITE)) {
+ VM_PAGE_GRAB_FICTITIOUS(alias_page);
+ }
+ vm_object_lock(object);
+ vm_object_paging_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->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);
*upl_ptr = upl;
- }
- VM_PAGE_GRAB_FICTITIOUS(alias_page);
- vm_object_lock(object);
#ifdef UBC_DEBUG
- if(upl_ptr)
queue_enter(&object->uplq, upl, upl_t, uplq);
#endif /* UBC_DEBUG */
- vm_object_paging_begin(object);
+ }
+
entry = 0;
if(cntrl_flags & UPL_COPYOUT_FROM) {
upl->flags |= UPL_PAGE_SYNC_DONE;
+
while (xfer_size) {
- if(alias_page == NULL) {
+ if((alias_page == NULL) &&
+ !(cntrl_flags & UPL_SET_LITE)) {
vm_object_unlock(object);
VM_PAGE_GRAB_FICTITIOUS(alias_page);
vm_object_lock(object);
(dst_page->wire_count != 0 &&
!dst_page->pageout) ||
((!(dst_page->dirty || dst_page->precious ||
- pmap_is_modified(dst_page->phys_addr)))
+ pmap_is_modified(dst_page->phys_page)))
&& (cntrl_flags & UPL_RET_ONLY_DIRTY)) ||
((!(dst_page->inactive))
&& (dst_page->page_ticket != page_ticket)
&& ((dst_page->page_ticket+1) != page_ticket)
- && (cntrl_flags & UPL_PAGEOUT)) ||
- ((!dst_page->list_req_pending) &&
+ && (cntrl_flags & UPL_FOR_PAGEOUT)) ||
+ ((!dst_page->list_req_pending) && (cntrl_flags & UPL_FOR_PAGEOUT) &&
(cntrl_flags & UPL_RET_ONLY_DIRTY) &&
- pmap_is_referenced(dst_page->phys_addr))) {
- if(user_page_list)
+ pmap_is_referenced(dst_page->phys_page))) {
+ if(user_page_list) {
user_page_list[entry].phys_addr = 0;
+ }
} else {
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;
+ if(user_page_list) {
+ user_page_list[entry].phys_addr = 0;
+ }
entry++;
dst_offset += PAGE_SIZE_64;
xfer_size -= PAGE_SIZE;
if((dst_page->cleaning || dst_page->absent ||
dst_page->wire_count != 0) &&
!dst_page->list_req_pending) {
- 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;
/* original object and its prodigy */
vm_page_lock_queues();
- if( !(cntrl_flags & UPL_FILE_IO)) {
- pmap_page_protect(dst_page->phys_addr, VM_PROT_NONE);
- }
+
/* pageout statistics gathering. count */
/* all the pages we will page out that */
/* were not counted in the initial */
dst_page->busy = FALSE;
dst_page->cleaning = FALSE;
- dirty = pmap_is_modified(dst_page->phys_addr);
- dirty = dirty ? TRUE : dst_page->dirty;
-
- /* use pageclean setup, it is more convenient */
- /* even for the pageout cases here */
- vm_pageclean_setup(dst_page, alias_page,
- upl->map_object, size - xfer_size);
+ hw_dirty = pmap_is_modified(dst_page->phys_page);
+ 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*/
+
+ /*
+ * 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_pageclean_setup(dst_page,
+ alias_page, upl->map_object,
+ size - xfer_size);
+
+ alias_page->absent = FALSE;
+ alias_page = NULL;
+ }
if(!dirty) {
dst_page->dirty = FALSE;
if(dst_page->pageout)
dst_page->busy = TRUE;
- alias_page->absent = FALSE;
- alias_page = NULL;
if((!(cntrl_flags & UPL_CLEAN_IN_PLACE))
- || (cntrl_flags & UPL_PAGEOUT)) {
+ || (cntrl_flags & UPL_FOR_PAGEOUT)) {
/* deny access to the target page */
/* while it is being worked on */
if((!dst_page->pageout) &&
}
if(user_page_list) {
user_page_list[entry].phys_addr
- = dst_page->phys_addr;
+ = dst_page->phys_page;
user_page_list[entry].dirty =
dst_page->dirty;
user_page_list[entry].pageout =
user_page_list[entry].precious =
dst_page->precious;
}
-
vm_page_unlock_queues();
}
entry++;
}
} else {
while (xfer_size) {
- if(alias_page == NULL) {
+ if((alias_page == NULL) &&
+ !(cntrl_flags & UPL_SET_LITE)) {
vm_object_unlock(object);
VM_PAGE_GRAB_FICTITIOUS(alias_page);
vm_object_lock(object);
}
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)
/* requests. we want to grab */
/* pages around some which are */
/* already present. */
- 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;
/* dump the fictitious page */
dst_page->list_req_pending = FALSE;
dst_page->clustered = FALSE;
+
vm_page_lock_queues();
vm_page_free(dst_page);
vm_page_unlock_queues();
+
} else if ((dst_page->absent &&
dst_page->list_req_pending)) {
/* the default_pager case */
* physical page by asking the
* backing device.
*/
- if(user_page_list)
- user_page_list[entry]
- .phys_addr = 0;
+ if(user_page_list) {
+ user_page_list[entry].phys_addr = 0;
+ }
entry++;
dst_offset += PAGE_SIZE_64;
xfer_size -= PAGE_SIZE;
PAGE_SLEEP(object, dst_page, THREAD_UNINT);
continue;
}
-
vm_page_lock_queues();
+
if( !(cntrl_flags & UPL_FILE_IO)) {
- pmap_page_protect(dst_page->phys_addr, VM_PROT_NONE);
+ pmap_page_protect(dst_page->phys_page, VM_PROT_NONE);
+ }
+ hw_dirty = pmap_is_modified(dst_page->phys_page);
+ 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*/
+
+ /*
+ * 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_pageclean_setup(dst_page,
+ alias_page, upl->map_object,
+ size - xfer_size);
+
+ alias_page->absent = FALSE;
+ alias_page = NULL;
}
- dirty = pmap_is_modified(dst_page->phys_addr);
- dirty = dirty ? TRUE : dst_page->dirty;
-
- vm_pageclean_setup(dst_page, alias_page,
- upl->map_object, size - xfer_size);
if(cntrl_flags & UPL_CLEAN_IN_PLACE) {
/* clean in place for read implies */
} else {
vm_page_wire(dst_page);
}
- /* expect the page to be used */
+ /*
+ * expect the page to be used
+ */
dst_page->reference = TRUE;
dst_page->precious =
(cntrl_flags & UPL_PRECIOUS)
? TRUE : FALSE;
- alias_page->absent = FALSE;
- alias_page = NULL;
if(user_page_list) {
user_page_list[entry].phys_addr
- = dst_page->phys_addr;
+ = dst_page->phys_page;
user_page_list[entry].dirty =
dst_page->dirty;
user_page_list[entry].pageout =
xfer_size -= PAGE_SIZE;
}
}
-
if (upl->flags & UPL_INTERNAL) {
if(page_list_count != NULL)
*page_list_count = 0;
if(object->paging_offset > offset)
return KERN_FAILURE;
+ assert(object->paging_in_progress);
offset = offset - object->paging_offset;
- if(cntrl_flags & UPL_PAGEOUT) {
+ if(cntrl_flags & UPL_FOR_PAGEOUT) {
if((target_page = vm_page_lookup(object, offset))
!= VM_PAGE_NULL) {
ticket = target_page->page_ticket;
return KERN_FAILURE;
}
- offset = 0; /* Always map the entire object */
+ 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;
+ wpl_array_t lite_list;
+
+ if(upl->flags & UPL_INTERNAL) {
+ lite_list = (wpl_array_t)
+ ((((vm_offset_t)upl) + sizeof(struct upl))
+ + ((upl->size/PAGE_SIZE)
+ * sizeof(upl_page_info_t)));
+ } else {
+ lite_list = (wpl_array_t)
+ (((vm_offset_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->wimg_bits = object->wimg_bits;
+ vm_object_unlock(upl->map_object);
+ offset = upl->map_object->shadow_offset;
+ new_offset = 0;
+ size = upl->size;
+ vm_object_lock(object);
+ 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");
+ }
+
+ vm_object_paging_begin(object);
+
+ /*
+ * 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_wire(alias_page);
+
+ 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);
+ }
+ if ((upl->flags & (UPL_DEVICE_MEMORY | UPL_IO_WIRE)) || upl->map_object->phys_contiguous)
+ offset = upl->offset - upl->map_object->paging_offset;
+ else
+ offset = 0;
+
size = upl->size;
vm_object_lock(upl->map_object);
boolean_t *empty)
{
vm_size_t xfer_size = size;
- vm_object_t shadow_object = upl->map_object->shadow;
+ vm_object_t shadow_object;
vm_object_t object = upl->map_object;
vm_object_offset_t target_offset;
- vm_object_offset_t page_offset;
int entry;
+ wpl_array_t lite_list;
+ int occupied;
+ int delayed_unlock = 0;
+ boolean_t shadow_internal;
*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;
+ }
+
upl_lock(upl);
- if(upl->flags & UPL_DEVICE_MEMORY) {
+
+ if (upl->flags & UPL_CLEAR_DIRTY)
+ flags |= UPL_COMMIT_CLEAR_DIRTY;
+
+ if (upl->flags & UPL_DEVICE_MEMORY) {
xfer_size = 0;
} else if ((offset + size) > upl->size) {
upl_unlock(upl);
return KERN_FAILURE;
}
+ if (upl->flags & UPL_INTERNAL) {
+ lite_list = (wpl_array_t)
+ ((((vm_offset_t)upl) + sizeof(struct upl))
+ + ((upl->size/PAGE_SIZE) * sizeof(upl_page_info_t)));
+ } else {
+ lite_list = (wpl_array_t)
+ (((vm_offset_t)upl) + sizeof(struct upl));
+ }
+
vm_object_lock(shadow_object);
+ shadow_internal = shadow_object->internal;
entry = offset/PAGE_SIZE;
target_offset = (vm_object_offset_t)offset;
+
while(xfer_size) {
vm_page_t t,m;
upl_page_info_t *p;
- if((t = vm_page_lookup(object, target_offset)) != NULL) {
+ m = VM_PAGE_NULL;
- t->pageout = FALSE;
- page_offset = t->offset;
- VM_PAGE_FREE(t);
- t = VM_PAGE_NULL;
- m = vm_page_lookup(shadow_object,
- page_offset + object->shadow_offset);
- if(m != VM_PAGE_NULL) {
- vm_object_paging_end(shadow_object);
- vm_page_lock_queues();
- if ((upl->flags & UPL_CLEAR_DIRTY) ||
- (flags & UPL_COMMIT_CLEAR_DIRTY)) {
- pmap_clear_modify(m->phys_addr);
- m->dirty = FALSE;
- }
- if(page_list) {
- p = &(page_list[entry]);
- 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) {
- m->pageout = FALSE;
- m->absent = FALSE;
- m->overwriting = FALSE;
- vm_page_unwire(m);
- PAGE_WAKEUP_DONE(m);
+ 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;
+
+ 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) {
+
+ if (upl->flags & UPL_IO_WIRE) {
+
+ if (delayed_unlock == 0)
+ vm_page_lock_queues();
+
+ vm_page_unwire(m);
+
+ if (delayed_unlock++ > DELAYED_UNLOCK_LIMIT) {
+ delayed_unlock = 0;
+ vm_page_unlock_queues();
+ }
+ if (page_list) {
page_list[entry].phys_addr = 0;
- }
- m->dump_cleaning = FALSE;
- if(m->laundry) {
- vm_page_laundry_count--;
- m->laundry = FALSE;
- if (vm_page_laundry_count < vm_page_laundry_min) {
- vm_page_laundry_min = 0;
- thread_wakeup((event_t)
- &vm_page_laundry_count);
- }
- }
- if(m->pageout) {
- m->cleaning = FALSE;
- m->pageout = FALSE;
+ }
+ if (flags & UPL_COMMIT_SET_DIRTY) {
+ m->dirty = TRUE;
+ } else if (flags & UPL_COMMIT_CLEAR_DIRTY) {
+ m->dirty = FALSE;
+ pmap_clear_modify(m->phys_page);
+ }
+ if (flags & UPL_COMMIT_INACTIVATE) {
+ m->reference = FALSE;
+ vm_page_deactivate(m);
+ pmap_clear_reference(m->phys_page);
+ }
+ 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) {
+ m->dirty = FALSE;
+ pmap_clear_modify(m->phys_page);
+ }
+ if (flags & UPL_COMMIT_INACTIVATE)
+ pmap_clear_reference(m->phys_page);
+
+ if (page_list) {
+ p = &(page_list[entry]);
+ 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) {
+ m->pageout = FALSE;
+ m->absent = FALSE;
+ m->overwriting = FALSE;
+ vm_page_unwire(m);
+ PAGE_WAKEUP_DONE(m);
+ }
+ page_list[entry].phys_addr = 0;
+ }
+ m->dump_cleaning = FALSE;
+ if(m->laundry) {
+ if (!shadow_internal)
+ vm_page_burst_count--;
+ vm_page_laundry_count--;
+ m->laundry = FALSE;
+ if (vm_page_laundry_count < vm_page_laundry_min) {
+ vm_page_laundry_min = 0;
+ thread_wakeup((event_t)
+ &vm_page_laundry_count);
+ }
+ }
+ if(m->pageout) {
+ m->cleaning = FALSE;
+ m->pageout = FALSE;
#if MACH_CLUSTER_STATS
- if (m->wanted) vm_pageout_target_collisions++;
+ if (m->wanted) vm_pageout_target_collisions++;
#endif
- pmap_page_protect(m->phys_addr, VM_PROT_NONE);
- m->dirty = pmap_is_modified(m->phys_addr);
- if(m->dirty) {
- CLUSTER_STAT(
- vm_pageout_target_page_dirtied++;)
- vm_page_unwire(m);/* reactivates */
- VM_STAT(reactivations++);
- PAGE_WAKEUP_DONE(m);
- } else {
- CLUSTER_STAT(
- vm_pageout_target_page_freed++;)
- vm_page_free(m);/* clears busy, etc. */
- VM_STAT(pageouts++);
- }
- vm_page_unlock_queues();
- target_offset += PAGE_SIZE_64;
- xfer_size -= PAGE_SIZE;
- entry++;
- continue;
- }
- if (flags & UPL_COMMIT_INACTIVATE) {
- vm_page_deactivate(m);
- m->reference = FALSE;
- pmap_clear_reference(m->phys_addr);
- } else if (!m->active && !m->inactive) {
- if (m->reference)
- vm_page_activate(m);
- else
- vm_page_deactivate(m);
- }
+ pmap_page_protect(m->phys_page, VM_PROT_NONE);
+ m->dirty = pmap_is_modified(m->phys_page);
+ if(m->dirty) {
+ CLUSTER_STAT(
+ vm_pageout_target_page_dirtied++;)
+ vm_page_unwire(m);/* reactivates */
+ VM_STAT(reactivations++);
+ PAGE_WAKEUP_DONE(m);
+ } else {
+ CLUSTER_STAT(
+ vm_pageout_target_page_freed++;)
+ vm_page_free(m);/* clears busy, etc. */
+
+ 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 MACH_CLUSTER_STATS
- m->dirty = pmap_is_modified(m->phys_addr);
+ 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++;
+ if (m->dirty) vm_pageout_cluster_dirtied++;
+ else vm_pageout_cluster_cleaned++;
+ if (m->wanted) vm_pageout_cluster_collisions++;
#else
- m->dirty = 0;
+ m->dirty = 0;
#endif
- if((m->busy) && (m->cleaning)) {
- /* the request_page_list case */
- if(m->absent) {
- m->absent = FALSE;
- if(shadow_object->absent_count == 1)
+ 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
+ else
shadow_object->absent_count--;
- }
- 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;
-
- if (flags & UPL_COMMIT_SET_DIRTY) {
- m->dirty = TRUE;
- }
- /*
- * Wakeup any thread waiting for the page to be un-cleaning.
- */
- PAGE_WAKEUP(m);
- vm_page_unlock_queues();
-
}
+ 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;
+
+ if (flags & UPL_COMMIT_SET_DIRTY)
+ m->dirty = TRUE;
+
+ 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);
+ }
+ /*
+ * Wakeup any thread waiting for the page to be un-cleaning.
+ */
+ PAGE_WAKEUP(m);
+
+ if (delayed_unlock++ > DELAYED_UNLOCK_LIMIT) {
+ delayed_unlock = 0;
+ vm_page_unlock_queues();
+ }
}
target_offset += PAGE_SIZE_64;
xfer_size -= PAGE_SIZE;
entry++;
}
+ if (delayed_unlock)
+ vm_page_unlock_queues();
+
+ 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; i<pg_num; i++) {
+ if(lite_list[i] != 0) {
+ occupied = 1;
+ break;
+ }
+ }
+ } else {
+ if(queue_empty(&upl->map_object->memq)) {
+ occupied = 0;
+ }
+ }
- vm_object_unlock(shadow_object);
- if(flags & UPL_COMMIT_NOTIFY_EMPTY) {
- if((upl->flags & UPL_DEVICE_MEMORY)
- || (queue_empty(&upl->map_object->memq)))
+ 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);
upl_unlock(upl);
return KERN_SUCCESS;
boolean_t *empty)
{
vm_size_t xfer_size = size;
- vm_object_t shadow_object = upl->map_object->shadow;
+ vm_object_t shadow_object;
vm_object_t object = upl->map_object;
vm_object_offset_t target_offset;
vm_object_offset_t page_offset;
int entry;
+ wpl_array_t lite_list;
+ int occupied;
+ boolean_t shadow_internal;
*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(object->pageout) {
+ shadow_object = object->shadow;
+ } else {
+ shadow_object = object;
+ }
+
upl_lock(upl);
if(upl->flags & UPL_DEVICE_MEMORY) {
xfer_size = 0;
}
vm_object_lock(shadow_object);
+ shadow_internal = shadow_object->internal;
+
+ if(upl->flags & UPL_INTERNAL) {
+ lite_list = (wpl_array_t)
+ ((((vm_offset_t)upl) + sizeof(struct upl))
+ + ((upl->size/PAGE_SIZE) * sizeof(upl_page_info_t)));
+ } else {
+ lite_list = (wpl_array_t)
+ (((vm_offset_t)upl) + sizeof(struct upl));
+ }
entry = offset/PAGE_SIZE;
target_offset = (vm_object_offset_t)offset;
vm_page_t t,m;
upl_page_info_t *p;
- if((t = vm_page_lookup(object, target_offset)) != NULL) {
-
- t->pageout = FALSE;
- page_offset = t->offset;
- VM_PAGE_FREE(t);
- t = VM_PAGE_NULL;
- m = vm_page_lookup(shadow_object,
- page_offset + object->shadow_offset);
- if(m != VM_PAGE_NULL) {
- vm_object_paging_end(m->object);
+ 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) {
/* COPYOUT = FALSE case */
continue;
}
/*
- * Handle the trusted pager throttle.
- */
- if (m->laundry) {
+ * Handle the trusted pager throttle.
+ */
+ if (m->laundry) {
+ if (!shadow_internal)
+ vm_page_burst_count--;
vm_page_laundry_count--;
m->laundry = FALSE;
if (vm_page_laundry_count
- < vm_page_laundry_min) {
+ < vm_page_laundry_min) {
vm_page_laundry_min = 0;
thread_wakeup((event_t)
&vm_page_laundry_count);
#endif /* MACH_PAGEMAP */
if(error & UPL_ABORT_DUMP_PAGES) {
vm_page_free(m);
- pmap_page_protect(m->phys_addr, VM_PROT_NONE);
+ pmap_page_protect(m->phys_page, VM_PROT_NONE);
} else {
PAGE_WAKEUP(m);
}
vm_page_unlock_queues();
}
- }
- target_offset += PAGE_SIZE_64;
- xfer_size -= PAGE_SIZE;
- entry++;
+ target_offset += PAGE_SIZE_64;
+ xfer_size -= PAGE_SIZE;
+ entry++;
}
- vm_object_unlock(shadow_object);
- if(error & UPL_ABORT_NOTIFY_EMPTY) {
- if((upl->flags & UPL_DEVICE_MEMORY)
- || (queue_empty(&upl->map_object->memq)))
+ 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; i<pg_num; i++) {
+ if(lite_list[i] != 0) {
+ occupied = 1;
+ break;
+ }
+ }
+ } else {
+ if(queue_empty(&upl->map_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);
+
upl_unlock(upl);
+
return KERN_SUCCESS;
}
vm_object_offset_t shadow_offset;
vm_object_offset_t target_offset;
int 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_IO_WIRE) {
+ boolean_t empty;
+ return upl_commit_range(upl,
+ 0, upl->size, 0,
+ NULL, 0, &empty);
+ }
+
upl_lock(upl);
if(upl->flags & UPL_DEVICE_MEMORY) {
upl_unlock(upl);
return KERN_INVALID_ARGUMENT;
}
- shadow_object = upl->map_object->shadow;
- shadow_offset = upl->map_object->shadow_offset;
+ if(object->pageout) {
+ shadow_object = object->shadow;
+ shadow_offset = object->shadow_offset;
+ } else {
+ shadow_object = object;
+ shadow_offset = upl->offset - object->paging_offset;
+ }
+
+ if(upl->flags & UPL_INTERNAL) {
+ lite_list = (wpl_array_t)
+ ((((vm_offset_t)upl) + sizeof(struct upl))
+ + ((upl->size/PAGE_SIZE) * sizeof(upl_page_info_t)));
+ } else {
+ lite_list = (wpl_array_t)
+ (((vm_offset_t)upl) + sizeof(struct upl));
+ }
offset = 0;
vm_object_lock(shadow_object);
+ shadow_internal = shadow_object->internal;
+
for(i = 0; i<(upl->size); i+=PAGE_SIZE, offset += PAGE_SIZE_64) {
- if((t = vm_page_lookup(object,offset)) != NULL) {
- target_offset = t->offset + shadow_offset;
- if((m = vm_page_lookup(shadow_object, target_offset)) != NULL) {
- vm_object_paging_end(m->object);
+ 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))) {
+ lite_list[pg_num>>5] &= ~(1 << (pg_num & 31));
+ m = vm_page_lookup(
+ shadow_object, target_offset);
+ }
+ }
+ if(object->pageout) {
+ if ((t = vm_page_lookup(object, offset)) != 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) {
vm_page_lock_queues();
if(m->absent) {
/* COPYOUT = FALSE case */
* Handle the trusted pager throttle.
*/
if (m->laundry) {
+ if (!shadow_internal)
+ vm_page_burst_count--;
vm_page_laundry_count--;
m->laundry = FALSE;
if (vm_page_laundry_count
#endif /* MACH_PAGEMAP */
if(error & UPL_ABORT_DUMP_PAGES) {
vm_page_free(m);
- pmap_page_protect(m->phys_addr, VM_PROT_NONE);
+ pmap_page_protect(m->phys_page, VM_PROT_NONE);
} else {
PAGE_WAKEUP(m);
}
vm_page_unlock_queues();
}
- }
}
- vm_object_unlock(shadow_object);
- /* Remove all the pages from the map object so */
- /* vm_pageout_object_terminate will work properly. */
- while (!queue_empty(&upl->map_object->memq)) {
- vm_page_t p;
-
- p = (vm_page_t) queue_first(&upl->map_object->memq);
-
- assert(p->private);
- assert(p->pageout);
- p->pageout = FALSE;
- assert(!p->cleaning);
+ 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; i<pg_num; i++) {
+ if(lite_list[i] != 0) {
+ occupied = 1;
+ break;
+ }
+ }
+ } else {
+ if(queue_empty(&upl->map_object->memq)) {
+ occupied = 0;
+ }
+ }
- VM_PAGE_FREE(p);
+ if(occupied == 0) {
+ if(object == shadow_object)
+ vm_object_paging_end(shadow_object);
}
+ vm_object_unlock(shadow_object);
+
upl_unlock(upl);
return KERN_SUCCESS;
}
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_CLEAR_DIRTY) ||
- (upl->flags & UPL_PAGE_SYNC_DONE)) {
- vm_object_t shadow_object = upl->map_object->shadow;
- vm_object_t object = upl->map_object;
- vm_object_offset_t target_offset;
- vm_size_t xfer_end;
-
- vm_page_t t,m;
-
- vm_object_lock(shadow_object);
-
- target_offset = object->shadow_offset;
- xfer_end = upl->size + object->shadow_offset;
- while(target_offset < xfer_end) {
- if ((t = vm_page_lookup(object,
- target_offset - object->shadow_offset))
- != NULL) {
- m = vm_page_lookup(
- shadow_object, target_offset);
- if(m != VM_PAGE_NULL) {
- if (upl->flags & UPL_CLEAR_DIRTY) {
- pmap_clear_modify(m->phys_addr);
- 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;
- }
- }
- target_offset += PAGE_SIZE_64;
- }
- vm_object_unlock(shadow_object);
- }
- if (page_list) {
+ 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;
m = vm_page_lookup(shadow_object, target_offset);
if(m != VM_PAGE_NULL) {
- p = &(page_list[entry]);
- if(page_list[entry].phys_addr &&
+ 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 &&
+ } else if (page_list[entry].phys_addr &&
!p->pageout && m->pageout &&
!m->dump_cleaning) {
vm_page_lock_queues();
vm_page_unwire(m);
PAGE_WAKEUP_DONE(m);
vm_page_unlock_queues();
+ }
+ page_list[entry].phys_addr = 0;
}
- page_list[entry].phys_addr = 0;
}
target_offset += PAGE_SIZE_64;
entry++;
vm_object_unlock(shadow_object);
}
+ 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;
}
+
+
+kern_return_t
+vm_object_iopl_request(
+ vm_object_t object,
+ vm_object_offset_t offset,
+ vm_size_t size,
+ upl_t *upl_ptr,
+ upl_page_info_array_t user_page_list,
+ unsigned int *page_list_count,
+ int cntrl_flags)
+{
+ vm_page_t dst_page;
+ vm_object_offset_t dst_offset = offset;
+ vm_size_t xfer_size = size;
+ upl_t upl = NULL;
+ int entry;
+ wpl_array_t lite_list;
+ int page_field_size;
+ int delayed_unlock = 0;
+
+ vm_page_t alias_page = NULL;
+ kern_return_t ret;
+ vm_prot_t prot;
+
+
+ if(cntrl_flags & UPL_COPYOUT_FROM) {
+ prot = VM_PROT_READ;
+ } 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(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_upl_request: vnode object with non-zero paging offset\n");
+
+ 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;
+ }
+
+ 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 *)
+ (((vm_offset_t)upl) + sizeof(struct upl));
+ lite_list = (wpl_array_t)
+ (((vm_offset_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 *)
+ (((vm_offset_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)
+ (((vm_offset_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(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_lock(object);
+ vm_object_paging_begin(object);
+ vm_object_unlock(object);
+
+ /* 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)>>12;
+ 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;
+ }
+ }
+ return KERN_SUCCESS;
+ }
+ 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);
+ }
+ }
+ vm_object_lock(object);
+ vm_object_paging_begin(object);
+
+ if (!object->phys_contiguous) {
+ /* 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 UBC_DEBUG
+ queue_enter(&object->uplq, upl, upl_t, uplq);
+#endif /* UBC_DEBUG */
+ }
+
+ entry = 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);
+ }
+ dst_page = vm_page_lookup(object, dst_offset);
+
+ if ((dst_page == VM_PAGE_NULL) || (dst_page->busy) ||
+ (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;
+ 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) {
+ interruptible = THREAD_ABORTSAFE;
+ } else {
+ interruptible = THREAD_UNINT;
+ }
+
+ 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, FALSE, FALSE, NULL, 0);
+
+ switch(result) {
+ case VM_FAULT_SUCCESS:
+
+ PAGE_WAKEUP_DONE(dst_page);
+
+ /*
+ * Release paging references and
+ * top-level placeholder page, if any.
+ */
+
+ 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);
+ VM_PAGE_FREE(top_page);
+ vm_object_paging_end(
+ local_object);
+ vm_object_unlock(
+ local_object);
+ } else {
+ VM_PAGE_FREE(top_page);
+ vm_object_paging_end(
+ local_object);
+ }
+ }
+
+ 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 */
+
+ case VM_FAULT_INTERRUPTED:
+ error_code = MACH_SEND_INTERRUPTED;
+ case VM_FAULT_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++);
+ }
+ vm_object_unlock(object);
+ upl_destroy(upl);
+ return ret;
+ }
+ } while ((result != VM_FAULT_SUCCESS)
+ || (result == VM_FAULT_INTERRUPTED));
+ }
+ if (delayed_unlock == 0)
+ vm_page_lock_queues();
+ vm_page_wire(dst_page);
+
+ 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 {
+ /*
+ * 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;
+ }
+
+ /* 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 (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 (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 (alias_page != NULL) {
+ vm_page_lock_queues();
+ vm_page_free(alias_page);
+ vm_page_unlock_queues();
+ }
+
+ vm_object_unlock(object);
+ return KERN_SUCCESS;
+}
+
vm_size_t
upl_get_internal_pagelist_offset()
{
projects / apple / xnu.git / blobdiff