*
* @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/host.h>
#include <kern/xpr.h>
#include <ppc/proc_reg.h>
-#include <ppc/pmap_internals.h>
#include <vm/task_working_set.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
int vm_fault_debug = 0;
boolean_t vm_page_deactivate_behind = TRUE;
-vm_machine_attribute_val_t mv_cache_sync = MATTR_VAL_CACHE_SYNC;
#if !VM_FAULT_STATIC_CONFIG
boolean_t vm_fault_dirty_handling = FALSE;
vm_map_t map,
vm_offset_t va,
vm_map_entry_t entry,
- pmap_t pmap);
+ pmap_t pmap,
+ vm_offset_t pmap_addr);
extern void vm_fault_continue(void);
CLUSTER_STAT(int pages_at_higher_offsets;)
CLUSTER_STAT(int pages_at_lower_offsets;)
kern_return_t wait_result;
- thread_t cur_thread;
boolean_t interruptible_state;
boolean_t bumped_pagein = FALSE;
#endif /* MACH_KDB */
#endif /* STATIC_CONFIG */
- cur_thread = current_thread();
-
- interruptible_state = cur_thread->interruptible;
- if (interruptible == THREAD_UNINT)
- cur_thread->interruptible = FALSE;
+ interruptible_state = thread_interrupt_level(interruptible);
/*
* INVARIANTS (through entire routine):
#endif
if (!object->alive) {
vm_fault_cleanup(object, first_m);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return(VM_FAULT_MEMORY_ERROR);
}
m = vm_page_lookup(object, offset);
#if TRACEFAULTPAGE
dbgTrace(0xBEEF0005, (unsigned int) m, (unsigned int) 0); /* (TEST/DEBUG) */
#endif
- PAGE_ASSERT_WAIT(m, interruptible);
- vm_object_unlock(object);
+ wait_result = PAGE_SLEEP(object, m, interruptible);
XPR(XPR_VM_FAULT,
"vm_f_page: block busy obj 0x%X, offset 0x%X, page 0x%X\n",
(integer_t)object, offset,
(integer_t)m, 0, 0);
counter(c_vm_fault_page_block_busy_kernel++);
- wait_result = thread_block((void (*)(void))0);
- vm_object_lock(object);
if (wait_result != THREAD_AWAKENED) {
vm_fault_cleanup(object, first_m);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
if (wait_result == THREAD_RESTART)
{
return(VM_FAULT_RETRY);
*error_code = m->page_error;
VM_PAGE_FREE(m);
vm_fault_cleanup(object, first_m);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return(VM_FAULT_MEMORY_ERROR);
}
#endif
VM_PAGE_FREE(m);
vm_fault_cleanup(object, first_m);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return(VM_FAULT_RETRY);
}
if (object->shadow_severed) {
vm_fault_cleanup(
object, first_m);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return VM_FAULT_MEMORY_ERROR;
}
if (VM_PAGE_THROTTLED() ||
(real_m = vm_page_grab()) == VM_PAGE_NULL) {
vm_fault_cleanup(object, first_m);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return(VM_FAULT_MEMORY_SHORTAGE);
}
+
XPR(XPR_VM_FAULT,
"vm_f_page: zero obj 0x%X, off 0x%X, page 0x%X, first_obj 0x%X\n",
(integer_t)object, offset,
}
vm_object_lock(object);
}
- pmap_clear_modify(m->phys_addr);
+ pmap_clear_modify(m->phys_page);
vm_page_lock_queues();
VM_PAGE_QUEUES_REMOVE(m);
m->page_ticket = vm_page_ticket;
+ if(m->object->size > 0x80000) {
+ m->zero_fill = TRUE;
+ /* depends on the queues lock */
+ vm_zf_count += 1;
+ queue_enter(&vm_page_queue_zf,
+ m, vm_page_t, pageq);
+ } else {
+ queue_enter(
+ &vm_page_queue_inactive,
+ m, vm_page_t, pageq);
+ }
vm_page_ticket_roll++;
if(vm_page_ticket_roll ==
VM_PAGE_TICKETS_IN_ROLL) {
else
vm_page_ticket++;
}
- queue_enter(&vm_page_queue_inactive,
- m, vm_page_t, pageq);
m->inactive = TRUE;
vm_page_inactive_count++;
vm_page_unlock_queues();
if (m != VM_PAGE_NULL && m->cleaning) {
PAGE_ASSERT_WAIT(m, interruptible);
vm_object_unlock(object);
- wait_result = thread_block((void (*)(void)) 0);
+ wait_result = thread_block(THREAD_CONTINUE_NULL);
vm_object_deallocate(object);
goto backoff;
} else {
vm_object_unlock(object);
vm_object_deallocate(object);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return VM_FAULT_RETRY;
}
}
vm_object_lock(object);
assert(object->ref_count > 0);
if (!object->pager_ready) {
- vm_object_assert_wait(
+ wait_result = vm_object_assert_wait(
object,
VM_OBJECT_EVENT_PAGER_READY,
interruptible);
vm_object_unlock(object);
- wait_result = thread_block((void (*)(void))0);
+ if (wait_result == THREAD_WAITING)
+ wait_result = thread_block(THREAD_CONTINUE_NULL);
vm_object_deallocate(object);
goto backoff;
} else {
vm_object_unlock(object);
vm_object_deallocate(object);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return VM_FAULT_RETRY;
}
}
printf("vm_fault: memory_object_data_unlock failed\n");
vm_object_lock(object);
vm_fault_cleanup(object, first_m);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return((rc == MACH_SEND_INTERRUPTED) ?
VM_FAULT_INTERRUPTED :
VM_FAULT_MEMORY_ERROR);
!((access_required & m->unlock_request) != access_required)) {
PAGE_ASSERT_WAIT(m, interruptible);
vm_object_unlock(object);
- wait_result = thread_block((void (*)(void)) 0);
+ wait_result = thread_block(THREAD_CONTINUE_NULL);
vm_object_deallocate(object);
goto backoff;
} else {
vm_object_unlock(object);
vm_object_deallocate(object);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return VM_FAULT_RETRY;
}
}
#endif
if (m == VM_PAGE_NULL) {
vm_fault_cleanup(object, first_m);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return(VM_FAULT_FICTITIOUS_SHORTAGE);
}
vm_page_insert(m, object, offset);
vm_object_lock(object);
assert(object->ref_count > 0);
if (!object->pager_ready) {
- vm_object_assert_wait(object,
+ wait_result = vm_object_assert_wait(object,
VM_OBJECT_EVENT_PAGER_READY,
interruptible);
vm_object_unlock(object);
- wait_result = thread_block((void (*)(void))0);
+ if (wait_result == THREAD_WAITING)
+ wait_result = thread_block(THREAD_CONTINUE_NULL);
vm_object_deallocate(object);
goto backoff;
} else {
vm_object_unlock(object);
vm_object_deallocate(object);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return VM_FAULT_RETRY;
}
}
if (m->fictitious && !vm_page_convert(m)) {
VM_PAGE_FREE(m);
vm_fault_cleanup(object, first_m);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return(VM_FAULT_MEMORY_SHORTAGE);
}
} else if (object->absent_count >
vm_object_absent_assert_wait(object,
interruptible);
vm_object_unlock(object);
- wait_result = thread_block((void (*)(void))0);
+ wait_result = thread_block(THREAD_CONTINUE_NULL);
vm_object_deallocate(object);
goto backoff;
} else {
vm_object_unlock(object);
vm_object_deallocate(object);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return VM_FAULT_RETRY;
}
}
}
+no_clustering:
cluster_start = offset;
length = PAGE_SIZE;
- cluster_size = object->cluster_size;
-
- /*
- * Skip clustered pagein if it is globally disabled
- * or random page reference behavior is expected
- * for the address range containing the faulting
- * address or the object paging block size is
- * equal to the page size.
- */
- if (!vm_allow_clustered_pagein ||
- behavior == VM_BEHAVIOR_RANDOM ||
- m == VM_PAGE_NULL ||
- cluster_size == PAGE_SIZE) {
- cluster_start = trunc_page_64(cluster_start);
- goto no_clustering;
- }
-
- assert(offset >= lo_offset);
- assert(offset < hi_offset);
- assert(ALIGNED(object->paging_offset));
- assert(cluster_size >= PAGE_SIZE);
-
-#if TRACEFAULTPAGE
- dbgTrace(0xBEEF0011, (unsigned int) m, (unsigned int) 0); /* (TEST/DEBUG) */
-#endif
- /*
- * Decide whether to scan ahead or behind for
- * additional pages contiguous to the faulted
- * page in the same paging block. The decision
- * is based on system wide globals and the
- * expected page reference behavior of the
- * address range contained the faulting address.
- * First calculate some constants.
- */
- paging_offset = offset + object->paging_offset;
- cluster_offset = paging_offset & (cluster_size - 1);
- align_offset = paging_offset&(PAGE_SIZE_64-1);
- if (align_offset != 0) {
- cluster_offset = trunc_page_64(cluster_offset);
- }
-
-#define SPANS_CLUSTER(x) ((((x) - align_offset) & (vm_object_offset_t)(cluster_size - 1)) == 0)
-
- /*
- * Backward scan only if reverse sequential
- * behavior has been specified
- */
- CLUSTER_STAT(pages_at_lower_offsets = 0;)
- if (((vm_default_behind != 0 &&
- behavior == VM_BEHAVIOR_DEFAULT) ||
- behavior == VM_BEHAVIOR_RSEQNTL) && offset) {
- vm_object_offset_t cluster_bot;
-
- /*
- * Calculate lower search boundary.
- * Exclude pages that span a cluster boundary.
- * Clip to start of map entry.
- * For default page reference behavior, scan
- * default pages behind.
- */
- cluster_bot = (offset > cluster_offset) ?
- offset - cluster_offset : offset;
- if (align_offset != 0) {
- if ((cluster_bot < offset) &&
- SPANS_CLUSTER(cluster_bot)) {
- cluster_bot += PAGE_SIZE_64;
- }
- }
- if (behavior == VM_BEHAVIOR_DEFAULT) {
- vm_object_offset_t
- bot = (vm_object_offset_t)
- (vm_default_behind * PAGE_SIZE);
-
- if (cluster_bot < (offset - bot))
- cluster_bot = offset - bot;
- }
- if (lo_offset > cluster_bot)
- cluster_bot = lo_offset;
-
- for ( cluster_start = offset - PAGE_SIZE_64;
- (cluster_start >= cluster_bot) &&
- (cluster_start !=
- (align_offset - PAGE_SIZE_64));
- cluster_start -= PAGE_SIZE_64) {
- assert(cluster_size > PAGE_SIZE_64);
-retry_cluster_backw:
- if (!LOOK_FOR(object, cluster_start) ||
- vm_page_lookup(object, cluster_start)
- != VM_PAGE_NULL) {
- break;
- }
- if (object->internal) {
- /*
- * need to acquire a real page in
- * advance because this acts as
- * a throttling mechanism for
- * data_requests to the default
- * pager. If this fails, give up
- * trying to find any more pages
- * in the cluster and send off the
- * request for what we already have.
- */
- if ((m = vm_page_grab())
- == VM_PAGE_NULL) {
- cluster_start += PAGE_SIZE_64;
- cluster_end = offset + PAGE_SIZE_64;
- goto give_up;
- }
- } else if ((m = vm_page_grab_fictitious())
- == VM_PAGE_NULL) {
- vm_object_unlock(object);
- vm_page_more_fictitious();
- vm_object_lock(object);
- goto retry_cluster_backw;
- }
- m->absent = TRUE;
- m->unusual = TRUE;
- m->clustered = TRUE;
- m->list_req_pending = TRUE;
-
- vm_page_insert(m, object, cluster_start);
- CLUSTER_STAT(pages_at_lower_offsets++;)
- object->absent_count++;
- }
- cluster_start += PAGE_SIZE_64;
- assert(cluster_start >= cluster_bot);
- }
- assert(cluster_start <= offset);
-
- /*
- * Forward scan if default or sequential behavior
- * specified
- */
- CLUSTER_STAT(pages_at_higher_offsets = 0;)
- if ((behavior == VM_BEHAVIOR_DEFAULT &&
- vm_default_ahead != 0) ||
- behavior == VM_BEHAVIOR_SEQUENTIAL) {
- vm_object_offset_t cluster_top;
-
- /*
- * Calculate upper search boundary.
- * Exclude pages that span a cluster boundary.
- * Clip to end of map entry.
- * For default page reference behavior, scan
- * default pages ahead.
- */
- cluster_top = (offset + cluster_size) -
- cluster_offset;
- if (align_offset != 0) {
- if ((cluster_top > (offset + PAGE_SIZE_64)) &&
- SPANS_CLUSTER(cluster_top)) {
- cluster_top -= PAGE_SIZE_64;
- }
- }
- if (behavior == VM_BEHAVIOR_DEFAULT) {
- vm_object_offset_t top = (vm_object_offset_t)
- ((vm_default_ahead*PAGE_SIZE)+PAGE_SIZE);
-
- if (cluster_top > (offset + top))
- cluster_top = offset + top;
- }
- if (cluster_top > hi_offset)
- cluster_top = hi_offset;
-
- for (cluster_end = offset + PAGE_SIZE_64;
- cluster_end < cluster_top;
- cluster_end += PAGE_SIZE_64) {
- assert(cluster_size > PAGE_SIZE);
-retry_cluster_forw:
- if (!LOOK_FOR(object, cluster_end) ||
- vm_page_lookup(object, cluster_end)
- != VM_PAGE_NULL) {
- break;
- }
- if (object->internal) {
- /*
- * need to acquire a real page in
- * advance because this acts as
- * a throttling mechanism for
- * data_requests to the default
- * pager. If this fails, give up
- * trying to find any more pages
- * in the cluster and send off the
- * request for what we already have.
- */
- if ((m = vm_page_grab())
- == VM_PAGE_NULL) {
- break;
- }
- } else if ((m = vm_page_grab_fictitious())
- == VM_PAGE_NULL) {
- vm_object_unlock(object);
- vm_page_more_fictitious();
- vm_object_lock(object);
- goto retry_cluster_forw;
- }
- m->absent = TRUE;
- m->unusual = TRUE;
- m->clustered = TRUE;
- m->list_req_pending = TRUE;
-
- vm_page_insert(m, object, cluster_end);
- CLUSTER_STAT(pages_at_higher_offsets++;)
- object->absent_count++;
- }
- assert(cluster_end <= cluster_top);
- }
- else {
- cluster_end = offset + PAGE_SIZE_64;
- }
-give_up:
- assert(cluster_end >= offset + PAGE_SIZE_64);
- length = cluster_end - cluster_start;
-
-#if MACH_CLUSTER_STATS
- CLUSTER_STAT_HIGHER(pages_at_higher_offsets);
- CLUSTER_STAT_LOWER(pages_at_lower_offsets);
- CLUSTER_STAT_CLUSTER(length/PAGE_SIZE);
-#endif /* MACH_CLUSTER_STATS */
-no_clustering:
/*
* lengthen the cluster by the pages in the working set
*/
* could be affected by re-entrance we
* do not need to take the map lock.
*/
+ cluster_end = offset + PAGE_SIZE_64;
tws_build_cluster((tws_hash_t)
current_task()->dynamic_working_set,
object, &cluster_start,
- &cluster_end, 0x16000);
+ &cluster_end, 0x40000);
length = cluster_end - cluster_start;
}
#if TRACEFAULTPAGE
*/
if (type_of_fault)
- *type_of_fault = DBG_PAGEIN_FAULT;
+ *type_of_fault = (length << 8) | DBG_PAGEIN_FAULT;
VM_STAT(pageins++);
current_task()->pageins++;
bumped_pagein = TRUE;
}
}
vm_fault_cleanup(object, first_m);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return((rc == MACH_SEND_INTERRUPTED) ?
VM_FAULT_INTERRUPTED :
VM_FAULT_MEMORY_ERROR);
task = current_task();
if((map != NULL) &&
- (task->dynamic_working_set != 0)) {
+ (task->dynamic_working_set != 0))
+ && !(object->private)) {
+ vm_object_t base_object;
+ vm_object_offset_t base_offset;
+ base_object = object;
+ base_offset = offset;
+ while(base_object->shadow) {
+ base_offset +=
+ base_object->shadow_offset;
+ base_object =
+ base_object->shadow;
+ }
if(tws_lookup
((tws_hash_t)
task->dynamic_working_set,
- offset, object,
+ base_offset, base_object,
&line) == KERN_SUCCESS) {
tws_line_signal((tws_hash_t)
task->dynamic_working_set,
if ((interruptible != THREAD_UNINT) &&
(current_thread()->state & TH_ABORT)) {
vm_fault_cleanup(object, first_m);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return(VM_FAULT_INTERRUPTED);
}
if(m == VM_PAGE_NULL)
if (object->shadow_severed) {
VM_PAGE_FREE(m);
vm_fault_cleanup(object, VM_PAGE_NULL);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return VM_FAULT_MEMORY_ERROR;
}
(m->fictitious && !vm_page_convert(m))) {
VM_PAGE_FREE(m);
vm_fault_cleanup(object, VM_PAGE_NULL);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return(VM_FAULT_MEMORY_SHORTAGE);
}
m->no_isync = FALSE;
}
vm_page_lock_queues();
VM_PAGE_QUEUES_REMOVE(m);
+ if(m->object->size > 0x80000) {
+ m->zero_fill = TRUE;
+ /* depends on the queues lock */
+ vm_zf_count += 1;
+ queue_enter(&vm_page_queue_zf,
+ m, vm_page_t, pageq);
+ } else {
+ queue_enter(
+ &vm_page_queue_inactive,
+ m, vm_page_t, pageq);
+ }
m->page_ticket = vm_page_ticket;
vm_page_ticket_roll++;
if(vm_page_ticket_roll == VM_PAGE_TICKETS_IN_ROLL) {
else
vm_page_ticket++;
}
- queue_enter(&vm_page_queue_inactive,
- m, vm_page_t, pageq);
m->inactive = TRUE;
vm_page_inactive_count++;
vm_page_unlock_queues();
- pmap_clear_modify(m->phys_addr);
+ pmap_clear_modify(m->phys_page);
break;
}
else {
if (copy_m == VM_PAGE_NULL) {
RELEASE_PAGE(m);
vm_fault_cleanup(object, first_m);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return(VM_FAULT_MEMORY_SHORTAGE);
}
vm_page_lock_queues();
assert(!m->cleaning);
- pmap_page_protect(m->phys_addr, VM_PROT_NONE);
+ pmap_page_protect(m->phys_page, VM_PROT_NONE);
vm_page_deactivate(m);
copy_m->dirty = TRUE;
/*
* shadowed object, and one here to push it into the copy.
*/
- while (first_object->copy_strategy == MEMORY_OBJECT_COPY_DELAY &&
- (copy_object = first_object->copy) != VM_OBJECT_NULL &&
+ while ((copy_object = first_object->copy) != VM_OBJECT_NULL &&
(m!= VM_PAGE_NULL)) {
vm_object_offset_t copy_offset;
vm_page_t copy_m;
if (copy_m != VM_PAGE_NULL && copy_m->busy) {
PAGE_ASSERT_WAIT(copy_m, interruptible);
vm_object_unlock(copy_object);
- wait_result = thread_block((void (*)(void))0);
+ wait_result = thread_block(THREAD_CONTINUE_NULL);
vm_object_deallocate(copy_object);
goto backoff;
} else {
vm_object_unlock(copy_object);
vm_object_deallocate(copy_object);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return VM_FAULT_RETRY;
}
}
assert(copy_object->ref_count > 0);
vm_object_unlock(copy_object);
vm_fault_cleanup(object, first_m);
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return(VM_FAULT_MEMORY_SHORTAGE);
}
vm_page_lock_queues();
assert(!m->cleaning);
- pmap_page_protect(m->phys_addr, VM_PROT_NONE);
+ pmap_page_protect(m->phys_page, VM_PROT_NONE);
copy_m->dirty = TRUE;
vm_page_unlock_queues();
#if TRACEFAULTPAGE
dbgTrace(0xBEEF001A, (unsigned int) VM_FAULT_SUCCESS, 0); /* (TEST/DEBUG) */
#endif
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
if(*result_page == VM_PAGE_NULL) {
vm_object_unlock(object);
}
vm_fault_cleanup(object, first_m);
counter(c_vm_fault_page_block_backoff_kernel++);
- thread_block((void (*)(void))0);
+ thread_block(THREAD_CONTINUE_NULL);
#endif
backoff:
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
if (wait_result == THREAD_INTERRUPTED)
return VM_FAULT_INTERRUPTED;
return VM_FAULT_RETRY;
vm_offset_t vaddr,
vm_prot_t fault_type,
boolean_t change_wiring,
- int interruptible)
+ int interruptible,
+ pmap_t caller_pmap,
+ vm_offset_t caller_pmap_addr)
{
vm_map_version_t version; /* Map version for verificiation */
boolean_t wired; /* Should mapping be wired down? */
funnel_t *curflock;
thread_t cur_thread;
boolean_t interruptible_state;
+ unsigned int cache_attr;
+ int write_startup_file = 0;
+ vm_prot_t full_fault_type;
KERNEL_DEBUG_CONSTANT((MACHDBG_CODE(DBG_MACH_VM, 0)) | DBG_FUNC_START,
0,
0);
- cur_thread = current_thread();
+ /* at present we do not fully check for execute permission */
+ /* we generally treat it is read except in certain device */
+ /* memory settings */
+ full_fault_type = fault_type;
+ if(fault_type & VM_PROT_EXECUTE) {
+ fault_type &= ~VM_PROT_EXECUTE;
+ fault_type |= VM_PROT_READ;
+ }
- interruptible_state = cur_thread->interruptible;
- if (interruptible == THREAD_UNINT)
- cur_thread->interruptible = FALSE;
+ interruptible_state = thread_interrupt_level(interruptible);
/*
* assume we will hit a page in the cache
/*
* drop funnel if it is already held. Then restore while returning
*/
+ cur_thread = current_thread();
+
if ((cur_thread->funnel_state & TH_FN_OWNED) == TH_FN_OWNED) {
funnel_set = TRUE;
curflock = cur_thread->funnel_lock;
while (TRUE) {
m = vm_page_lookup(cur_object, cur_offset);
if (m != VM_PAGE_NULL) {
- if (m->busy)
- break;
+ if (m->busy) {
+ wait_result_t result;
+
+ if (object != cur_object)
+ vm_object_unlock(object);
+
+ vm_map_unlock_read(map);
+ if (pmap_map != map)
+ vm_map_unlock(pmap_map);
+
+#if !VM_FAULT_STATIC_CONFIG
+ if (!vm_fault_interruptible)
+ interruptible = THREAD_UNINT;
+#endif
+ result = PAGE_ASSERT_WAIT(m, interruptible);
+
+ vm_object_unlock(cur_object);
+
+ if (result == THREAD_WAITING) {
+ result = thread_block(THREAD_CONTINUE_NULL);
+
+ counter(c_vm_fault_page_block_busy_kernel++);
+ }
+ if (result == THREAD_AWAKENED || result == THREAD_RESTART)
+ goto RetryFault;
+ kr = KERN_ABORTED;
+ goto done;
+ }
if (m->unusual && (m->error || m->restart || m->private
|| m->absent || (fault_type & m->page_lock))) {
- /*
+ /*
* Unusual case. Give up.
*/
break;
m->busy = TRUE;
vm_object_paging_begin(object);
- vm_object_unlock(object);
FastPmapEnter:
/*
prot &= ~VM_PROT_WRITE;
#endif /* MACH_KDB */
#endif /* STATIC_CONFIG */
- PMAP_ENTER(pmap, vaddr, m, prot, wired);
-
- if (m->no_isync) {
- pmap_attribute(pmap,
- vaddr,
- PAGE_SIZE,
- MATTR_CACHE,
- &mv_cache_sync);
-
+ cache_attr = ((unsigned int)m->object->wimg_bits) & VM_WIMG_MASK;
+ if ((m->no_isync == TRUE) ||
+ (cache_attr != VM_WIMG_DEFAULT)) {
+ pmap_sync_caches_phys(m->phys_page);
+ m->no_isync = FALSE;
}
- {
- tws_hash_line_t line;
- task_t task;
- task = current_task();
- if((map != NULL) &&
- (task->dynamic_working_set != 0)) {
- if(tws_lookup
- ((tws_hash_t)
- task->dynamic_working_set,
- cur_offset, object,
- &line) != KERN_SUCCESS) {
- if(tws_insert((tws_hash_t)
- task->dynamic_working_set,
- m->offset, m->object,
- vaddr, pmap_map)
- == KERN_NO_SPACE) {
- tws_expand_working_set(
- task->dynamic_working_set,
- TWS_HASH_LINE_COUNT);
- }
- }
- }
+ if(caller_pmap) {
+ PMAP_ENTER(caller_pmap,
+ caller_pmap_addr, m,
+ prot, cache_attr, wired);
+ } else {
+ PMAP_ENTER(pmap, vaddr, m,
+ prot, cache_attr, wired);
}
- if (m->clustered) {
- vm_pagein_cluster_used++;
- m->clustered = FALSE;
- }
/*
- * Grab the object lock to manipulate
+ * Grab the queues lock to manipulate
* the page queues. Change wiring
* case is obvious. In soft ref bits
* case activate page only if it fell
* move active page to back of active
* queue. This code doesn't.
*/
- vm_object_lock(object);
vm_page_lock_queues();
- /*
- * we did the isync above... we're clearing
- * the flag here to avoid holding a lock
- * while calling pmap functions, however
- * we need hold the object lock before
- * we can modify the flag
- */
- m->no_isync = FALSE;
+
+ if (m->clustered) {
+ vm_pagein_cluster_used++;
+ m->clustered = FALSE;
+ }
m->reference = TRUE;
if (change_wiring) {
*/
PAGE_WAKEUP_DONE(m);
vm_object_paging_end(object);
+
+ {
+ tws_hash_line_t line;
+ task_t task;
+
+ task = current_task();
+ if((map != NULL) &&
+ (task->dynamic_working_set != 0) &&
+ !(object->private)) {
+ kern_return_t kr;
+ vm_object_t base_object;
+ vm_object_offset_t base_offset;
+ base_object = object;
+ base_offset = cur_offset;
+ while(base_object->shadow) {
+ base_offset +=
+ base_object->shadow_offset;
+ base_object =
+ base_object->shadow;
+ }
+ kr = tws_lookup((tws_hash_t)
+ task->dynamic_working_set,
+ base_offset, base_object,
+ &line);
+ if(kr == KERN_OPERATION_TIMED_OUT){
+ write_startup_file = 1;
+ } else if (kr != KERN_SUCCESS) {
+ kr = tws_insert((tws_hash_t)
+ task->dynamic_working_set,
+ base_offset, base_object,
+ vaddr, pmap_map);
+ if(kr == KERN_NO_SPACE) {
+ vm_object_unlock(object);
+
+ tws_expand_working_set(
+ task->dynamic_working_set,
+ TWS_HASH_LINE_COUNT,
+ FALSE);
+
+ vm_object_lock(object);
+ }
+ if(kr ==
+ KERN_OPERATION_TIMED_OUT) {
+ write_startup_file = 1;
+ }
+ }
+ }
+ }
vm_object_unlock(object);
+
vm_map_unlock_read(map);
if(pmap_map != map)
vm_map_unlock(pmap_map);
- if (funnel_set) {
+ if(write_startup_file)
+ tws_send_startup_info(current_task());
+
+ if (funnel_set)
thread_funnel_set( curflock, TRUE);
- funnel_set = FALSE;
- }
- cur_thread->interruptible = interruptible_state;
+
+ thread_interrupt_level(interruptible_state);
+
KERNEL_DEBUG_CONSTANT((MACHDBG_CODE(DBG_MACH_VM, 0)) | DBG_FUNC_END,
vaddr,
- type_of_fault,
+ type_of_fault & 0xff,
KERN_SUCCESS,
- 0,
+ type_of_fault >> 8,
0);
+
return KERN_SUCCESS;
}
if (cur_object == object)
break;
-
/*
* This is now a shadow based copy on write
* fault -- it requires a copy up the shadow
if (m == VM_PAGE_NULL) {
break;
}
-
/*
* Now do the copy. Mark the source busy
* and take out paging references on both
vm_page_lock_queues();
vm_page_deactivate(cur_m);
m->dirty = TRUE;
- pmap_page_protect(cur_m->phys_addr,
+ pmap_page_protect(cur_m->phys_page,
VM_PROT_NONE);
vm_page_unlock_queues();
vm_object_paging_end(object);
vm_object_collapse(object);
vm_object_paging_begin(object);
- vm_object_unlock(object);
goto FastPmapEnter;
}
/*
* Have to talk to the pager. Give up.
*/
-
break;
}
if(pmap_map != map)
vm_map_unlock(pmap_map);
+ if(write_startup_file)
+ tws_send_startup_info(
+ current_task());
+
if (funnel_set) {
thread_funnel_set( curflock, TRUE);
funnel_set = FALSE;
}
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
return VM_FAULT_MEMORY_ERROR;
}
VM_PAGE_QUEUES_REMOVE(m);
m->page_ticket = vm_page_ticket;
+ if(m->object->size > 0x80000) {
+ m->zero_fill = TRUE;
+ /* depends on the queues lock */
+ vm_zf_count += 1;
+ queue_enter(&vm_page_queue_zf,
+ m, vm_page_t, pageq);
+ } else {
+ queue_enter(
+ &vm_page_queue_inactive,
+ m, vm_page_t, pageq);
+ }
vm_page_ticket_roll++;
if(vm_page_ticket_roll ==
VM_PAGE_TICKETS_IN_ROLL) {
vm_page_ticket++;
}
- queue_enter(&vm_page_queue_inactive,
- m, vm_page_t, pageq);
m->inactive = TRUE;
vm_page_inactive_count++;
vm_page_unlock_queues();
+ vm_object_lock(object);
+
goto FastPmapEnter;
}
vm_object_unlock(cur_object);
}
vm_map_unlock_read(map);
+
if(pmap_map != map)
vm_map_unlock(pmap_map);
vm_object_paging_begin(object);
XPR(XPR_VM_FAULT,"vm_fault -> vm_fault_page\n",0,0,0,0,0);
+ {
+ tws_hash_line_t line;
+ task_t task;
+ kern_return_t kr;
+
+ task = current_task();
+ if((map != NULL) &&
+ (task->dynamic_working_set != 0)
+ && !(object->private)) {
+ vm_object_t base_object;
+ vm_object_offset_t base_offset;
+ base_object = object;
+ base_offset = offset;
+ while(base_object->shadow) {
+ base_offset +=
+ base_object->shadow_offset;
+ base_object =
+ base_object->shadow;
+ }
+ kr = tws_lookup((tws_hash_t)
+ task->dynamic_working_set,
+ base_offset, base_object,
+ &line);
+ if(kr == KERN_OPERATION_TIMED_OUT){
+ write_startup_file = 1;
+ } else if (kr != KERN_SUCCESS) {
+ tws_insert((tws_hash_t)
+ task->dynamic_working_set,
+ base_offset, base_object,
+ vaddr, pmap_map);
+ kr = tws_insert((tws_hash_t)
+ task->dynamic_working_set,
+ base_offset, base_object,
+ vaddr, pmap_map);
+ if(kr == KERN_NO_SPACE) {
+ vm_object_unlock(object);
+ tws_expand_working_set(
+ task->dynamic_working_set,
+ TWS_HASH_LINE_COUNT,
+ FALSE);
+ vm_object_lock(object);
+ }
+ if(kr == KERN_OPERATION_TIMED_OUT) {
+ write_startup_file = 1;
+ }
+ }
+ }
+ }
kr = vm_fault_page(object, offset, fault_type,
(change_wiring && !wired),
interruptible,
if(m != VM_PAGE_NULL) {
old_copy_object = m->object->copy;
-
vm_object_unlock(m->object);
} else {
old_copy_object = VM_OBJECT_NULL;
* the pageout queues. If the pageout daemon comes
* across the page, it will remove it from the queues.
*/
- if(m != VM_PAGE_NULL) {
- if (m->no_isync) {
- m->no_isync = FALSE;
+ if (m != VM_PAGE_NULL) {
+ if (m->no_isync == TRUE) {
+ pmap_sync_caches_phys(m->phys_page);
- vm_object_unlock(m->object);
+ m->no_isync = FALSE;
+ }
- PMAP_ENTER(pmap, vaddr, m, prot, wired);
+ cache_attr = ((unsigned int)m->object->wimg_bits) & VM_WIMG_MASK;
- /*
- * It's critically important that a wired-down page be faulted
- * only once in each map for which it is wired.
- */
- /* Sync I & D caches for new mapping */
- pmap_attribute(pmap,
- vaddr,
- PAGE_SIZE,
- MATTR_CACHE,
- &mv_cache_sync);
+ if(caller_pmap) {
+ PMAP_ENTER(caller_pmap,
+ caller_pmap_addr, m,
+ prot, cache_attr, wired);
} else {
- vm_object_unlock(m->object);
-
- PMAP_ENTER(pmap, vaddr, m, prot, wired);
+ PMAP_ENTER(pmap, vaddr, m,
+ prot, cache_attr, wired);
}
{
tws_hash_line_t line;
task_t task;
+ kern_return_t kr;
task = current_task();
if((map != NULL) &&
- (task->dynamic_working_set != 0)) {
- if(tws_lookup
- ((tws_hash_t)
+ (task->dynamic_working_set != 0)
+ && (object->private)) {
+ vm_object_t base_object;
+ vm_object_offset_t base_offset;
+ base_object = m->object;
+ base_offset = m->offset;
+ while(base_object->shadow) {
+ base_offset +=
+ base_object->shadow_offset;
+ base_object =
+ base_object->shadow;
+ }
+ kr = tws_lookup((tws_hash_t)
task->dynamic_working_set,
- m->offset, m->object,
- &line) != KERN_SUCCESS) {
+ base_offset, base_object, &line);
+ if(kr == KERN_OPERATION_TIMED_OUT){
+ write_startup_file = 1;
+ } else if (kr != KERN_SUCCESS) {
tws_insert((tws_hash_t)
task->dynamic_working_set,
- m->offset, m->object,
+ base_offset, base_object,
vaddr, pmap_map);
- if(tws_insert((tws_hash_t)
+ kr = tws_insert((tws_hash_t)
task->dynamic_working_set,
- m->offset, m->object,
- vaddr, pmap_map)
- == KERN_NO_SPACE) {
+ base_offset, base_object,
+ vaddr, pmap_map);
+ if(kr == KERN_NO_SPACE) {
+ vm_object_unlock(m->object);
tws_expand_working_set(
- task->dynamic_working_set,
- TWS_HASH_LINE_COUNT);
+ task->dynamic_working_set,
+ TWS_HASH_LINE_COUNT,
+ FALSE);
+ vm_object_lock(m->object);
+ }
+ if(kr == KERN_OPERATION_TIMED_OUT) {
+ write_startup_file = 1;
}
}
}
}
} else {
-/* if __ppc__ not working until figure out phys copy on block maps */
-#ifdef notdefcdy
- int memattr;
- struct phys_entry *pp;
+#ifndef i386
+ int memattr;
+ vm_map_entry_t entry;
+ vm_offset_t laddr;
+ vm_offset_t ldelta, hdelta;
+
/*
* do a pmap block mapping from the physical address
* in the object
*/
- if(pp = pmap_find_physentry(
- (vm_offset_t)object->shadow_offset)) {
- memattr = ((pp->pte1 & 0x00000078) >> 3);
- } else {
- memattr = PTE_WIMG_UNCACHED_COHERENT_GUARDED;
+
+ /* While we do not worry about execution protection in */
+ /* general, certian pages may have instruction execution */
+ /* disallowed. We will check here, and if not allowed */
+ /* to execute, we return with a protection failure. */
+
+ if((full_fault_type & VM_PROT_EXECUTE) &&
+ (pmap_canExecute((ppnum_t)
+ (object->shadow_offset >> 12)) < 1)) {
+
+ vm_map_verify_done(map, &version);
+ if(pmap_map != map)
+ vm_map_unlock(pmap_map);
+ vm_fault_cleanup(object, top_page);
+ vm_object_deallocate(object);
+ kr = KERN_PROTECTION_FAILURE;
+ goto done;
+ }
+
+ if(pmap_map != map) {
+ vm_map_unlock(pmap_map);
+ }
+ if (original_map != map) {
+ vm_map_unlock_read(map);
+ vm_map_lock_read(original_map);
+ map = original_map;
+ }
+ pmap_map = map;
+
+ laddr = vaddr;
+ hdelta = 0xFFFFF000;
+ ldelta = 0xFFFFF000;
+
+
+ while(vm_map_lookup_entry(map, laddr, &entry)) {
+ if(ldelta > (laddr - entry->vme_start))
+ ldelta = laddr - entry->vme_start;
+ if(hdelta > (entry->vme_end - laddr))
+ hdelta = entry->vme_end - laddr;
+ if(entry->is_sub_map) {
+
+ laddr = (laddr - entry->vme_start)
+ + entry->offset;
+ vm_map_lock_read(entry->object.sub_map);
+ if(map != pmap_map)
+ vm_map_unlock_read(map);
+ if(entry->use_pmap) {
+ vm_map_unlock_read(pmap_map);
+ pmap_map = entry->object.sub_map;
+ }
+ map = entry->object.sub_map;
+
+ } else {
+ break;
+ }
}
- pmap_map_block(pmap, vaddr,
- (vm_offset_t)object->shadow_offset,
- object->size, prot,
- memattr, 0); /* Set up a block mapped area */
-//#else
- vm_offset_t off;
- for (off = 0; off < object->size; off += page_size) {
- pmap_enter(pmap, vaddr + off,
- object->shadow_offset + off, prot, TRUE);
+ if(vm_map_lookup_entry(map, laddr, &entry) &&
+ (entry->object.vm_object != NULL) &&
+ (entry->object.vm_object == object)) {
+
+
+ if(caller_pmap) {
+ /* Set up a block mapped area */
+ pmap_map_block(caller_pmap,
+ (addr64_t)(caller_pmap_addr - ldelta),
+ (((vm_offset_t)
+ (entry->object.vm_object->shadow_offset))
+ + entry->offset +
+ (laddr - entry->vme_start)
+ - ldelta)>>12,
+ ldelta + hdelta, prot,
+ (VM_WIMG_MASK & (int)object->wimg_bits), 0);
+ } else {
+ /* Set up a block mapped area */
+ pmap_map_block(pmap_map->pmap,
+ (addr64_t)(vaddr - ldelta),
+ (((vm_offset_t)
+ (entry->object.vm_object->shadow_offset))
+ + entry->offset +
+ (laddr - entry->vme_start) - ldelta)>>12,
+ ldelta + hdelta, prot,
+ (VM_WIMG_MASK & (int)object->wimg_bits), 0);
+ }
+ }
+#else
+#ifdef notyet
+ if(caller_pmap) {
+ pmap_enter(caller_pmap, caller_pmap_addr,
+ object->shadow_offset>>12, prot, 0, TRUE);
+ } else {
+ pmap_enter(pmap, vaddr,
+ object->shadow_offset>>12, prot, 0, TRUE);
+ }
/* Map it in */
- }
+#endif
#endif
}
* pageout daemon can find it.
*/
if(m != VM_PAGE_NULL) {
- vm_object_lock(m->object);
vm_page_lock_queues();
if (change_wiring) {
#undef RELEASE_PAGE
done:
+ if(write_startup_file)
+ tws_send_startup_info(current_task());
if (funnel_set) {
thread_funnel_set( curflock, TRUE);
funnel_set = FALSE;
}
- cur_thread->interruptible = interruptible_state;
+ thread_interrupt_level(interruptible_state);
KERNEL_DEBUG_CONSTANT((MACHDBG_CODE(DBG_MACH_VM, 0)) | DBG_FUNC_END,
vaddr,
- type_of_fault,
+ type_of_fault & 0xff,
kr,
- 0,
+ type_of_fault >> 8,
0);
+
return(kr);
}
vm_fault_wire(
vm_map_t map,
vm_map_entry_t entry,
- pmap_t pmap)
+ pmap_t pmap,
+ vm_offset_t pmap_addr)
{
register vm_offset_t va;
assert(entry->in_transition);
+ if ((entry->object.vm_object != NULL) &&
+ !entry->is_sub_map &&
+ entry->object.vm_object->phys_contiguous) {
+ return KERN_SUCCESS;
+ }
+
/*
* Inform the physical mapping system that the
* range of addresses may not fault, so that
* page tables and such can be locked down as well.
*/
- pmap_pageable(pmap, entry->vme_start, end_addr, FALSE);
+ pmap_pageable(pmap, pmap_addr,
+ pmap_addr + (end_addr - entry->vme_start), FALSE);
/*
* We simulate a fault to get the page and enter it
for (va = entry->vme_start; va < end_addr; va += PAGE_SIZE) {
if ((rc = vm_fault_wire_fast(
- map, va, entry, pmap)) != KERN_SUCCESS) {
+ map, va, entry, pmap,
+ pmap_addr + (va - entry->vme_start)
+ )) != KERN_SUCCESS) {
rc = vm_fault(map, va, VM_PROT_NONE, TRUE,
- (pmap == kernel_pmap) ? THREAD_UNINT : THREAD_ABORTSAFE);
+ (pmap == kernel_pmap) ?
+ THREAD_UNINT : THREAD_ABORTSAFE,
+ pmap, pmap_addr + (va - entry->vme_start));
}
if (rc != KERN_SUCCESS) {
/* unwire wired pages */
tmp_entry.vme_end = va;
- vm_fault_unwire(map, &tmp_entry, FALSE, pmap);
+ vm_fault_unwire(map,
+ &tmp_entry, FALSE, pmap, pmap_addr);
return rc;
}
vm_map_t map,
vm_map_entry_t entry,
boolean_t deallocate,
- pmap_t pmap)
+ pmap_t pmap,
+ vm_offset_t pmap_addr)
{
register vm_offset_t va;
register vm_offset_t end_addr = entry->vme_end;
*/
for (va = entry->vme_start; va < end_addr; va += PAGE_SIZE) {
- pmap_change_wiring(pmap, va, FALSE);
+ pmap_change_wiring(pmap,
+ pmap_addr + (va - entry->vme_start), FALSE);
if (object == VM_OBJECT_NULL) {
- (void) vm_fault(map, va, VM_PROT_NONE, TRUE, THREAD_UNINT);
+ (void) vm_fault(map, va, VM_PROT_NONE,
+ TRUE, THREAD_UNINT, pmap, pmap_addr);
+ } else if (object->phys_contiguous) {
+ continue;
} else {
vm_prot_t prot;
vm_page_t result_page;
result_object = result_page->object;
if (deallocate) {
assert(!result_page->fictitious);
- pmap_page_protect(result_page->phys_addr,
+ pmap_page_protect(result_page->phys_page,
VM_PROT_NONE);
VM_PAGE_FREE(result_page);
} else {
* such may be unwired themselves.
*/
- pmap_pageable(pmap, entry->vme_start, end_addr, TRUE);
+ pmap_pageable(pmap, pmap_addr,
+ pmap_addr + (end_addr - entry->vme_start), TRUE);
}
vm_map_t map,
vm_offset_t va,
vm_map_entry_t entry,
- pmap_t pmap)
+ pmap_t pmap,
+ vm_offset_t pmap_addr)
{
vm_object_t object;
vm_object_offset_t offset;
register vm_page_t m;
vm_prot_t prot;
thread_act_t thr_act;
+ unsigned int cache_attr;
VM_STAT(faults++);
* We have to unlock the object because pmap_enter
* may cause other faults.
*/
- if (m->no_isync) {
- m->no_isync = FALSE;
-
- vm_object_unlock(object);
-
- PMAP_ENTER(pmap, va, m, prot, TRUE);
-
- /* Sync I & D caches for new mapping */
- pmap_attribute(pmap,
- va,
- PAGE_SIZE,
- MATTR_CACHE,
- &mv_cache_sync);
-
- } else {
- vm_object_unlock(object);
+ if (m->no_isync == TRUE) {
+ pmap_sync_caches_phys(m->phys_page);
- PMAP_ENTER(pmap, va, m, prot, TRUE);
+ m->no_isync = FALSE;
}
- /*
- * Must relock object so that paging_in_progress can be cleared.
- */
- vm_object_lock(object);
+ cache_attr = ((unsigned int)m->object->wimg_bits) & VM_WIMG_MASK;
+
+ PMAP_ENTER(pmap, pmap_addr, m, prot, cache_attr, TRUE);
/*
* Unlock everything, and return
*/
if (!dst_object->pager_ready) {
- vm_object_assert_wait(dst_object,
- VM_OBJECT_EVENT_PAGER_READY,
- interruptible);
+ wait_result = vm_object_assert_wait(dst_object,
+ VM_OBJECT_EVENT_PAGER_READY,
+ interruptible);
vm_object_unlock(dst_object);
- wait_result = thread_block((void (*)(void))0);
+ if (wait_result == THREAD_WAITING)
+ wait_result = thread_block(THREAD_CONTINUE_NULL);
if (wait_result != THREAD_AWAKENED) {
DISCARD_PAGE;
return(VM_FAULT_INTERRUPTED);
break;
}
- PAGE_ASSERT_WAIT(dst_page, interruptible);
+ wait_result = PAGE_ASSERT_WAIT(dst_page, interruptible);
vm_object_unlock(dst_object);
- wait_result = thread_block((void (*)(void))0);
+ if (wait_result == THREAD_WAITING)
+ wait_result = thread_block(THREAD_CONTINUE_NULL);
if (wait_result != THREAD_AWAKENED) {
DISCARD_PAGE;
return(VM_FAULT_INTERRUPTED);
projects / apple / xnu.git / blobdiff