static kern_return_t vm_object_terminate(
vm_object_t object);
-extern void vm_object_remove(
- vm_object_t object);
-
static kern_return_t vm_object_copy_call(
vm_object_t src_object,
vm_object_offset_t src_offset,
vm_object_t backing_object);
static void vm_object_release_pager(
- memory_object_t pager,
- boolean_t hashed);
+ memory_object_t pager);
-static zone_t vm_object_zone; /* vm backing store zone */
+zone_t vm_object_zone; /* vm backing store zone */
/*
* All wired-down kernel memory belongs to a single virtual
unsigned int vm_page_purged_busy = 0;
unsigned int vm_page_purged_others = 0;
-#if VM_OBJECT_CACHE
-/*
- * Virtual memory objects that are not referenced by
- * any address maps, but that are allowed to persist
- * (an attribute specified by the associated memory manager),
- * are kept in a queue (vm_object_cached_list).
- *
- * When an object from this queue is referenced again,
- * for example to make another address space mapping,
- * it must be removed from the queue. That is, the
- * queue contains *only* objects with zero references.
- *
- * The kernel may choose to terminate objects from this
- * queue in order to reclaim storage. The current policy
- * is to permit a fixed maximum number of unreferenced
- * objects (vm_object_cached_max).
- *
- * A spin lock (accessed by routines
- * vm_object_cache_{lock,lock_try,unlock}) governs the
- * object cache. It must be held when objects are
- * added to or removed from the cache (in vm_object_terminate).
- * The routines that acquire a reference to a virtual
- * memory object based on one of the memory object ports
- * must also lock the cache.
- *
- * Ideally, the object cache should be more isolated
- * from the reference mechanism, so that the lock need
- * not be held to make simple references.
- */
-static vm_object_t vm_object_cache_trim(
- boolean_t called_from_vm_object_deallocate);
-
-static void vm_object_deactivate_all_pages(
- vm_object_t object);
-
-static int vm_object_cached_high; /* highest # cached objects */
-static int vm_object_cached_max = 512; /* may be patched*/
-
-#define vm_object_cache_lock() \
- lck_mtx_lock(&vm_object_cached_lock_data)
-#define vm_object_cache_lock_try() \
- lck_mtx_try_lock(&vm_object_cached_lock_data)
-
-#endif /* VM_OBJECT_CACHE */
-
static queue_head_t vm_object_cached_list;
static uint32_t vm_object_cache_pages_freed = 0;
static uint32_t vm_object_cache_pages_moved = 0;
static void vm_object_cache_remove_locked(vm_object_t);
-#define VM_OBJECT_HASH_COUNT 1024
-#define VM_OBJECT_HASH_LOCK_COUNT 512
-
-static lck_mtx_t vm_object_hashed_lock_data[VM_OBJECT_HASH_LOCK_COUNT];
-static lck_mtx_ext_t vm_object_hashed_lock_data_ext[VM_OBJECT_HASH_LOCK_COUNT];
-
-static queue_head_t vm_object_hashtable[VM_OBJECT_HASH_COUNT];
-static struct zone *vm_object_hash_zone;
-
-struct vm_object_hash_entry {
- queue_chain_t hash_link; /* hash chain link */
- memory_object_t pager; /* pager we represent */
- vm_object_t object; /* corresponding object */
- boolean_t waiting; /* someone waiting for
- * termination */
-};
-
-typedef struct vm_object_hash_entry *vm_object_hash_entry_t;
-#define VM_OBJECT_HASH_ENTRY_NULL ((vm_object_hash_entry_t) 0)
-
-#define VM_OBJECT_HASH_SHIFT 5
-#define vm_object_hash(pager) \
- ((int)((((uintptr_t)pager) >> VM_OBJECT_HASH_SHIFT) % VM_OBJECT_HASH_COUNT))
-
-#define vm_object_lock_hash(pager) \
- ((int)((((uintptr_t)pager) >> VM_OBJECT_HASH_SHIFT) % VM_OBJECT_HASH_LOCK_COUNT))
-
-void vm_object_hash_entry_free(
- vm_object_hash_entry_t entry);
-
static void vm_object_reap(vm_object_t object);
static void vm_object_reap_async(vm_object_t object);
static void vm_object_reaper_thread(void);
#endif
-static lck_mtx_t *
-vm_object_hash_lock_spin(
- memory_object_t pager)
-{
- int index;
-
- index = vm_object_lock_hash(pager);
-
- lck_mtx_lock_spin(&vm_object_hashed_lock_data[index]);
-
- return (&vm_object_hashed_lock_data[index]);
-}
-
-static void
-vm_object_hash_unlock(lck_mtx_t *lck)
-{
- lck_mtx_unlock(lck);
-}
-
-
-/*
- * vm_object_hash_lookup looks up a pager in the hashtable
- * and returns the corresponding entry, with optional removal.
- */
-static vm_object_hash_entry_t
-vm_object_hash_lookup(
- memory_object_t pager,
- boolean_t remove_entry)
-{
- queue_t bucket;
- vm_object_hash_entry_t entry;
-
- bucket = &vm_object_hashtable[vm_object_hash(pager)];
-
- entry = (vm_object_hash_entry_t)queue_first(bucket);
- while (!queue_end(bucket, (queue_entry_t)entry)) {
- if (entry->pager == pager) {
- if (remove_entry) {
- queue_remove(bucket, entry,
- vm_object_hash_entry_t, hash_link);
- }
- return(entry);
- }
- entry = (vm_object_hash_entry_t)queue_next(&entry->hash_link);
- }
- return(VM_OBJECT_HASH_ENTRY_NULL);
-}
-
-/*
- * vm_object_hash_enter enters the specified
- * pager / cache object association in the hashtable.
- */
-
-static void
-vm_object_hash_insert(
- vm_object_hash_entry_t entry,
- vm_object_t object)
-{
- queue_t bucket;
-
- assert(vm_object_hash_lookup(entry->pager, FALSE) == NULL);
-
- bucket = &vm_object_hashtable[vm_object_hash(entry->pager)];
-
- queue_enter(bucket, entry, vm_object_hash_entry_t, hash_link);
-
- if (object->hashed) {
- /*
- * "hashed" was pre-set on this (new) object to avoid
- * locking issues in vm_object_enter() (can't attempt to
- * grab the object lock while holding the hash lock as
- * a spinlock), so no need to set it here (and no need to
- * hold the object's lock).
- */
- } else {
- vm_object_lock_assert_exclusive(object);
- object->hashed = TRUE;
- }
-
- entry->object = object;
-}
-
-static vm_object_hash_entry_t
-vm_object_hash_entry_alloc(
- memory_object_t pager)
-{
- vm_object_hash_entry_t entry;
-
- entry = (vm_object_hash_entry_t)zalloc(vm_object_hash_zone);
- entry->pager = pager;
- entry->object = VM_OBJECT_NULL;
- entry->waiting = FALSE;
-
- return(entry);
-}
-
-void
-vm_object_hash_entry_free(
- vm_object_hash_entry_t entry)
-{
- zfree(vm_object_hash_zone, entry);
-}
-
/*
* vm_object_allocate:
*
*object = vm_object_template;
vm_page_queue_init(&object->memq);
- queue_init(&object->msr_q);
#if UPL_DEBUG || CONFIG_IOSCHED
queue_init(&object->uplq);
#endif
__private_extern__ void
vm_object_bootstrap(void)
{
- int i;
vm_size_t vm_object_size;
+ assert(sizeof (mo_ipc_object_bits_t) == sizeof (ipc_object_bits_t));
+
vm_object_size = (sizeof(struct vm_object) + (VM_PACKED_POINTER_ALIGNMENT-1)) & ~(VM_PACKED_POINTER_ALIGNMENT - 1);
vm_object_zone = zinit(vm_object_size,
"vm objects");
zone_change(vm_object_zone, Z_CALLERACCT, FALSE); /* don't charge caller */
zone_change(vm_object_zone, Z_NOENCRYPT, TRUE);
+ zone_change(vm_object_zone, Z_ALIGNMENT_REQUIRED, TRUE);
vm_object_init_lck_grp();
queue_init(&vm_object_reaper_queue);
- for (i = 0; i < VM_OBJECT_HASH_LOCK_COUNT; i++) {
- lck_mtx_init_ext(&vm_object_hashed_lock_data[i],
- &vm_object_hashed_lock_data_ext[i],
- &vm_object_lck_grp,
- &vm_object_lck_attr);
- }
lck_mtx_init_ext(&vm_object_reaper_lock_data,
&vm_object_reaper_lock_data_ext,
&vm_object_lck_grp,
&vm_object_lck_attr);
- vm_object_hash_zone =
- zinit((vm_size_t) sizeof (struct vm_object_hash_entry),
- round_page(512*1024),
- round_page(12*1024),
- "vm object hash entries");
- zone_change(vm_object_hash_zone, Z_CALLERACCT, FALSE);
- zone_change(vm_object_hash_zone, Z_NOENCRYPT, TRUE);
-
- for (i = 0; i < VM_OBJECT_HASH_COUNT; i++)
- queue_init(&vm_object_hashtable[i]);
-
/*
* Fill in a template object, for quick initialization
/* memq; Lock; init after allocation */
-
vm_object_template.memq.prev = 0;
vm_object_template.memq.next = 0;
#if 0
vm_object_template.res_count = 1;
#endif /* TASK_SWAPPER */
vm_object_template.resident_page_count = 0;
- vm_object_template.wired_page_count = 0;
+ // static vm_object_template is zeroed
+ // vm_object_template.wired_page_count = 0;
vm_object_template.reusable_page_count = 0;
vm_object_template.copy = VM_OBJECT_NULL;
vm_object_template.shadow = VM_OBJECT_NULL;
vm_object_template.pager_trusted = FALSE;
vm_object_template.can_persist = FALSE;
vm_object_template.internal = TRUE;
- vm_object_template.temporary = TRUE;
vm_object_template.private = FALSE;
vm_object_template.pageout = FALSE;
vm_object_template.alive = TRUE;
vm_object_template.purgable = VM_PURGABLE_DENY;
vm_object_template.purgeable_when_ripe = FALSE;
+ vm_object_template.purgeable_only_by_kernel = FALSE;
vm_object_template.shadowed = FALSE;
- vm_object_template.advisory_pageout = FALSE;
vm_object_template.true_share = FALSE;
vm_object_template.terminating = FALSE;
vm_object_template.named = FALSE;
vm_object_template.cached_list.prev = NULL;
vm_object_template.cached_list.next = NULL;
- vm_object_template.msr_q.prev = NULL;
- vm_object_template.msr_q.next = NULL;
vm_object_template.last_alloc = (vm_object_offset_t) 0;
vm_object_template.sequential = (vm_object_offset_t) 0;
vm_object_template.phantom_object_id = 0;
#endif
vm_object_template.cow_hint = ~(vm_offset_t)0;
-#if MACH_ASSERT
- vm_object_template.paging_object = VM_OBJECT_NULL;
-#endif /* MACH_ASSERT */
/* cache bitfields */
vm_object_template.wimg_bits = VM_WIMG_USE_DEFAULT;
vm_object_template.set_cache_attr = FALSE;
vm_object_template.object_slid = FALSE;
vm_object_template.code_signed = FALSE;
- vm_object_template.hashed = FALSE;
vm_object_template.transposed = FALSE;
vm_object_template.mapping_in_progress = FALSE;
vm_object_template.phantom_isssd = FALSE;
compressor_object);
kernel_object->copy_strategy = MEMORY_OBJECT_COPY_NONE;
compressor_object->copy_strategy = MEMORY_OBJECT_COPY_NONE;
+ kernel_object->no_tag_update = TRUE;
/*
* Initialize the "submap object". Make it as large as the
kr = kernel_thread_start_priority(
(thread_continue_t) vm_object_reaper_thread,
NULL,
- BASEPRI_PREEMPT - 1,
+ BASEPRI_VM,
&thread);
if (kr != KERN_SUCCESS) {
panic("failed to launch vm_object_reaper_thread kr=0x%x", kr);
lck_attr_cleardebug(&compressor_object_lck_attr);
}
-#if VM_OBJECT_CACHE
-#define MIGHT_NOT_CACHE_SHADOWS 1
-#if MIGHT_NOT_CACHE_SHADOWS
-static int cache_shadows = TRUE;
-#endif /* MIGHT_NOT_CACHE_SHADOWS */
-#endif
/*
* vm_object_deallocate:
vm_object_deallocate(
vm_object_t object)
{
-#if VM_OBJECT_CACHE
- boolean_t retry_cache_trim = FALSE;
- uint32_t try_failed_count = 0;
-#endif
vm_object_t shadow = VM_OBJECT_NULL;
// if(object)dbgLog(object, object->ref_count, object->can_persist, 3); /* (TEST/DEBUG) */
vm_object_collapse(object, 0, FALSE);
}
vm_object_unlock(object);
-#if VM_OBJECT_CACHE
- if (retry_cache_trim &&
- ((object = vm_object_cache_trim(TRUE)) !=
- VM_OBJECT_NULL)) {
- continue;
- }
-#endif
return;
}
continue;
}
-#if VM_OBJECT_CACHE
+ XPR(XPR_VM_OBJECT,
+ "vm_o_deallocate: 0x%X res %d paging_ops %d thread 0x%p ref %d\n",
+ object, object->resident_page_count,
+ object->paging_in_progress,
+ (void *)current_thread(),object->ref_count);
+
+ VM_OBJ_RES_DECR(object); /* XXX ? */
/*
- * If this object can persist, then enter it in
- * the cache. Otherwise, terminate it.
- *
- * NOTE: Only permanent objects are cached, and
- * permanent objects cannot have shadows. This
- * affects the residence counting logic in a minor
- * way (can do it in-line, mostly).
+ * Terminate this object. If it had a shadow,
+ * then deallocate it; otherwise, if we need
+ * to retry a cache trim, do so now; otherwise,
+ * we are done. "pageout" objects have a shadow,
+ * but maintain a "paging reference" rather than
+ * a normal reference.
*/
+ shadow = object->pageout?VM_OBJECT_NULL:object->shadow;
- if ((object->can_persist) && (object->alive)) {
- /*
- * Now it is safe to decrement reference count,
- * and to return if reference count is > 0.
- */
-
- vm_object_lock_assert_exclusive(object);
- if (--object->ref_count > 0) {
- vm_object_res_deallocate(object);
- vm_object_unlock(object);
-
- if (retry_cache_trim &&
- ((object = vm_object_cache_trim(TRUE)) !=
- VM_OBJECT_NULL)) {
- continue;
- }
- return;
- }
-
-#if MIGHT_NOT_CACHE_SHADOWS
- /*
- * Remove shadow now if we don't
- * want to cache shadows.
- */
- if (! cache_shadows) {
- shadow = object->shadow;
- object->shadow = VM_OBJECT_NULL;
- }
-#endif /* MIGHT_NOT_CACHE_SHADOWS */
-
- /*
- * Enter the object onto the queue of
- * cached objects, and deactivate
- * all of its pages.
- */
- assert(object->shadow == VM_OBJECT_NULL);
- VM_OBJ_RES_DECR(object);
- XPR(XPR_VM_OBJECT,
- "vm_o_deallocate: adding %x to cache, queue = (%x, %x)\n",
- object,
- vm_object_cached_list.next,
- vm_object_cached_list.prev,0,0);
-
-
- vm_object_unlock(object);
-
- try_failed_count = 0;
- for (;;) {
- vm_object_cache_lock();
-
- /*
- * if we try to take a regular lock here
- * we risk deadlocking against someone
- * holding a lock on this object while
- * trying to vm_object_deallocate a different
- * object
- */
- if (vm_object_lock_try(object))
- break;
- vm_object_cache_unlock();
- try_failed_count++;
-
- mutex_pause(try_failed_count); /* wait a bit */
- }
- vm_object_cached_count++;
- if (vm_object_cached_count > vm_object_cached_high)
- vm_object_cached_high = vm_object_cached_count;
- queue_enter(&vm_object_cached_list, object,
- vm_object_t, cached_list);
- vm_object_cache_unlock();
-
- vm_object_deactivate_all_pages(object);
- vm_object_unlock(object);
-
-#if MIGHT_NOT_CACHE_SHADOWS
- /*
- * If we have a shadow that we need
- * to deallocate, do so now, remembering
- * to trim the cache later.
- */
- if (! cache_shadows && shadow != VM_OBJECT_NULL) {
- object = shadow;
- retry_cache_trim = TRUE;
- continue;
- }
-#endif /* MIGHT_NOT_CACHE_SHADOWS */
-
- /*
- * Trim the cache. If the cache trim
- * returns with a shadow for us to deallocate,
- * then remember to retry the cache trim
- * when we are done deallocating the shadow.
- * Otherwise, we are done.
- */
-
- object = vm_object_cache_trim(TRUE);
- if (object == VM_OBJECT_NULL) {
- return;
- }
- retry_cache_trim = TRUE;
- } else
-#endif /* VM_OBJECT_CACHE */
- {
- /*
- * This object is not cachable; terminate it.
- */
- XPR(XPR_VM_OBJECT,
- "vm_o_deallocate: !cacheable 0x%X res %d paging_ops %d thread 0x%p ref %d\n",
- object, object->resident_page_count,
- object->paging_in_progress,
- (void *)current_thread(),object->ref_count);
-
- VM_OBJ_RES_DECR(object); /* XXX ? */
- /*
- * Terminate this object. If it had a shadow,
- * then deallocate it; otherwise, if we need
- * to retry a cache trim, do so now; otherwise,
- * we are done. "pageout" objects have a shadow,
- * but maintain a "paging reference" rather than
- * a normal reference.
- */
- shadow = object->pageout?VM_OBJECT_NULL:object->shadow;
-
- if (vm_object_terminate(object) != KERN_SUCCESS) {
- return;
- }
- if (shadow != VM_OBJECT_NULL) {
- object = shadow;
- continue;
- }
-#if VM_OBJECT_CACHE
- if (retry_cache_trim &&
- ((object = vm_object_cache_trim(TRUE)) !=
- VM_OBJECT_NULL)) {
- continue;
- }
-#endif
- return;
+ if (vm_object_terminate(object) != KERN_SUCCESS) {
+ return;
+ }
+ if (shadow != VM_OBJECT_NULL) {
+ object = shadow;
+ continue;
}
+ return;
}
-#if VM_OBJECT_CACHE
- assert(! retry_cache_trim);
-#endif
}
return (ep_freed);
}
-
-#if VM_OBJECT_CACHE
-/*
- * Check to see whether we really need to trim
- * down the cache. If so, remove an object from
- * the cache, terminate it, and repeat.
- *
- * Called with, and returns with, cache lock unlocked.
- */
-vm_object_t
-vm_object_cache_trim(
- boolean_t called_from_vm_object_deallocate)
-{
- vm_object_t object = VM_OBJECT_NULL;
- vm_object_t shadow;
-
- for (;;) {
-
- /*
- * If we no longer need to trim the cache,
- * then we are done.
- */
- if (vm_object_cached_count <= vm_object_cached_max)
- return VM_OBJECT_NULL;
-
- vm_object_cache_lock();
- if (vm_object_cached_count <= vm_object_cached_max) {
- vm_object_cache_unlock();
- return VM_OBJECT_NULL;
- }
-
- /*
- * We must trim down the cache, so remove
- * the first object in the cache.
- */
- XPR(XPR_VM_OBJECT,
- "vm_object_cache_trim: removing from front of cache (%x, %x)\n",
- vm_object_cached_list.next,
- vm_object_cached_list.prev, 0, 0, 0);
-
- object = (vm_object_t) queue_first(&vm_object_cached_list);
- if(object == (vm_object_t) &vm_object_cached_list) {
- /* something's wrong with the calling parameter or */
- /* the value of vm_object_cached_count, just fix */
- /* and return */
- if(vm_object_cached_max < 0)
- vm_object_cached_max = 0;
- vm_object_cached_count = 0;
- vm_object_cache_unlock();
- return VM_OBJECT_NULL;
- }
- vm_object_lock(object);
- queue_remove(&vm_object_cached_list, object, vm_object_t,
- cached_list);
- vm_object_cached_count--;
-
- vm_object_cache_unlock();
- /*
- * Since this object is in the cache, we know
- * that it is initialized and has no references.
- * Take a reference to avoid recursive deallocations.
- */
-
- assert(object->pager_initialized);
- assert(object->ref_count == 0);
- vm_object_lock_assert_exclusive(object);
- object->ref_count++;
-
- /*
- * Terminate the object.
- * If the object had a shadow, we let vm_object_deallocate
- * deallocate it. "pageout" objects have a shadow, but
- * maintain a "paging reference" rather than a normal
- * reference.
- * (We are careful here to limit recursion.)
- */
- shadow = object->pageout?VM_OBJECT_NULL:object->shadow;
-
- if(vm_object_terminate(object) != KERN_SUCCESS)
- continue;
-
- if (shadow != VM_OBJECT_NULL) {
- if (called_from_vm_object_deallocate) {
- return shadow;
- } else {
- vm_object_deallocate(shadow);
- }
- }
- }
-}
-#endif
-
-
/*
* Routine: vm_object_terminate
* Purpose:
vm_object_lock_assert_exclusive(object);
- if (!object->pageout && (!object->temporary || object->can_persist) &&
+ if (!object->pageout && (!object->internal && object->can_persist) &&
(object->pager != NULL || object->shadow_severed)) {
/*
* Clear pager_trusted bit so that the pages get yanked
if ( !object->internal && (object->objq.next || object->objq.prev))
vm_object_cache_remove(object);
- if (object->hashed) {
- lck_mtx_t *lck;
-
- lck = vm_object_hash_lock_spin(object->pager);
- vm_object_remove(object);
- vm_object_hash_unlock(lck);
- }
/*
* Detach the object from its shadow if we are the shadow's
* copy. The reference we hold on the shadow must be dropped
assert(object->objq.prev == NULL);
}
- /*
- * Clean or free the pages, as appropriate.
- * It is possible for us to find busy/absent pages,
- * if some faults on this object were aborted.
- */
if (object->pageout) {
+ /*
+ * free all remaining pages tabled on
+ * this object
+ * clean up it's shadow
+ */
assert(object->shadow != VM_OBJECT_NULL);
vm_pageout_object_terminate(object);
- } else if (((object->temporary && !object->can_persist) || (pager == MEMORY_OBJECT_NULL))) {
-
+ } else if (object->resident_page_count) {
+ /*
+ * free all remaining pages tabled on
+ * this object
+ */
vm_object_reap_pages(object, REAP_REAP);
}
assert(vm_page_queue_empty(&object->memq));
*/
if (pager != MEMORY_OBJECT_NULL) {
vm_object_unlock(object);
- vm_object_release_pager(pager, object->hashed);
+ vm_object_release_pager(pager);
vm_object_lock(object);
}
* flush page... page will be freed
* upon completion of I/O
*/
- (void)vm_pageout_cluster(p, FALSE, FALSE);
+ vm_pageout_cluster(p);
}
vm_page_unlock_queues();
/*
/*NOTREACHED*/
}
-/*
- * Routine: vm_object_pager_wakeup
- * Purpose: Wake up anyone waiting for termination of a pager.
- */
-
-static void
-vm_object_pager_wakeup(
- memory_object_t pager)
-{
- vm_object_hash_entry_t entry;
- boolean_t waiting = FALSE;
- lck_mtx_t *lck;
-
- /*
- * If anyone was waiting for the memory_object_terminate
- * to be queued, wake them up now.
- */
- lck = vm_object_hash_lock_spin(pager);
- entry = vm_object_hash_lookup(pager, TRUE);
- if (entry != VM_OBJECT_HASH_ENTRY_NULL)
- waiting = entry->waiting;
- vm_object_hash_unlock(lck);
-
- if (entry != VM_OBJECT_HASH_ENTRY_NULL) {
- if (waiting)
- thread_wakeup((event_t) pager);
- vm_object_hash_entry_free(entry);
- }
-}
-
/*
* Routine: vm_object_release_pager
* Purpose: Terminate the pager and, upon completion,
* release our last reference to it.
- * just like memory_object_terminate, except
- * that we wake up anyone blocked in vm_object_enter
- * waiting for termination message to be queued
- * before calling memory_object_init.
*/
static void
vm_object_release_pager(
- memory_object_t pager,
- boolean_t hashed)
+ memory_object_t pager)
{
/*
(void) memory_object_terminate(pager);
- if (hashed == TRUE) {
- /*
- * Wakeup anyone waiting for this terminate
- * and remove the entry from the hash
- */
- vm_object_pager_wakeup(pager);
- }
/*
* Release reference to pager.
*/
object->named = FALSE;
object->alive = FALSE;
- if (object->hashed) {
- lck_mtx_t *lck;
- /*
- * Rip out the pager from the vm_object now...
- */
- lck = vm_object_hash_lock_spin(object->pager);
- vm_object_remove(object);
- vm_object_hash_unlock(lck);
- }
old_pager = object->pager;
object->pager = MEMORY_OBJECT_NULL;
if (old_pager != MEMORY_OBJECT_NULL)
* Terminate the object now.
*/
if (old_pager != MEMORY_OBJECT_NULL) {
- vm_object_release_pager(old_pager, object->hashed);
+ vm_object_release_pager(old_pager);
/*
* JMM - Release the caller's reference. This assumes the
return(KERN_SUCCESS);
}
-
-#if VM_OBJECT_CACHE
-
-#define VM_OBJ_DEACT_ALL_STATS DEBUG
-#if VM_OBJ_DEACT_ALL_STATS
-uint32_t vm_object_deactivate_all_pages_batches = 0;
-uint32_t vm_object_deactivate_all_pages_pages = 0;
-#endif /* VM_OBJ_DEACT_ALL_STATS */
-/*
- * vm_object_deactivate_all_pages
- *
- * Deactivate all pages in the specified object. (Keep its pages
- * in memory even though it is no longer referenced.)
- *
- * The object must be locked.
- */
-static void
-vm_object_deactivate_all_pages(
- vm_object_t object)
-{
- vm_page_t p;
- int loop_count;
-#if VM_OBJ_DEACT_ALL_STATS
- int pages_count;
-#endif /* VM_OBJ_DEACT_ALL_STATS */
-#define V_O_D_A_P_MAX_BATCH 256
-
- loop_count = BATCH_LIMIT(V_O_D_A_P_MAX_BATCH);
-#if VM_OBJ_DEACT_ALL_STATS
- pages_count = 0;
-#endif /* VM_OBJ_DEACT_ALL_STATS */
- vm_page_lock_queues();
- vm_page_queue_iterate(&object->memq, p, vm_page_t, listq) {
- if (--loop_count == 0) {
-#if VM_OBJ_DEACT_ALL_STATS
- hw_atomic_add(&vm_object_deactivate_all_pages_batches,
- 1);
- hw_atomic_add(&vm_object_deactivate_all_pages_pages,
- pages_count);
- pages_count = 0;
-#endif /* VM_OBJ_DEACT_ALL_STATS */
- lck_mtx_yield(&vm_page_queue_lock);
- loop_count = BATCH_LIMIT(V_O_D_A_P_MAX_BATCH);
- }
- if (!p->busy && (p->vm_page_q_state != VM_PAGE_ON_THROTTLED_Q)) {
-#if VM_OBJ_DEACT_ALL_STATS
- pages_count++;
-#endif /* VM_OBJ_DEACT_ALL_STATS */
- vm_page_deactivate(p);
- }
- }
-#if VM_OBJ_DEACT_ALL_STATS
- if (pages_count) {
- hw_atomic_add(&vm_object_deactivate_all_pages_batches, 1);
- hw_atomic_add(&vm_object_deactivate_all_pages_pages,
- pages_count);
- pages_count = 0;
- }
-#endif /* VM_OBJ_DEACT_ALL_STATS */
- vm_page_unlock_queues();
-}
-#endif /* VM_OBJECT_CACHE */
-
-
-
/*
* The "chunk" macros are used by routines below when looking for pages to deactivate. These
* exist because of the need to handle shadow chains. When deactivating pages, we only
MARK_PAGE_HANDLED(*chunk_state, p);
- if (( !VM_PAGE_WIRED(m)) && (!m->private) && (!m->gobbled) && (!m->busy) && (!m->laundry)) {
+ if (( !VM_PAGE_WIRED(m)) && (!m->private) && (!m->gobbled) && (!m->busy) &&
+ (!m->laundry) && (!m->cleaning) && !(m->free_when_done)) {
int clear_refmod;
int pmap_options;
* remove access to all pages in shadowed objects.
*
* The object must *not* be locked. The object must
- * be temporary/internal.
+ * be internal.
*
* If pmap is not NULL, this routine assumes that
* the only mappings for the pages are in that
* [Furthermore, each routine must cope with the simultaneous
* or previous operations of the others.]
*
- * In addition to the lock on the object, the vm_object_hash_lock
- * governs the associations. References gained through the
- * association require use of the hash lock.
- *
* Because the pager field may be cleared spontaneously, it
* cannot be used to determine whether a memory object has
* ever been associated with a particular vm_object. [This
/*
- * Routine: vm_object_enter
+ * Routine: vm_object_memory_object_associate
* Purpose:
- * Find a VM object corresponding to the given
- * pager; if no such object exists, create one,
- * and initialize the pager.
+ * Associate a VM object to the given pager.
+ * If a VM object is not provided, create one.
+ * Initialize the pager.
*/
vm_object_t
-vm_object_enter(
+vm_object_memory_object_associate(
memory_object_t pager,
+ vm_object_t object,
vm_object_size_t size,
- boolean_t internal,
- boolean_t init,
boolean_t named)
{
- vm_object_t object;
- vm_object_t new_object;
- boolean_t must_init;
- vm_object_hash_entry_t entry, new_entry;
- uint32_t try_failed_count = 0;
- lck_mtx_t *lck;
+ memory_object_control_t control;
- if (pager == MEMORY_OBJECT_NULL)
- return(vm_object_allocate(size));
+ assert(pager != MEMORY_OBJECT_NULL);
- new_object = VM_OBJECT_NULL;
- new_entry = VM_OBJECT_HASH_ENTRY_NULL;
- must_init = init;
+ if (object != VM_OBJECT_NULL) {
+ assert(object->internal);
+ assert(object->pager_created);
+ assert(!object->pager_initialized);
+ assert(!object->pager_ready);
+ } else {
+ object = vm_object_allocate(size);
+ assert(object != VM_OBJECT_NULL);
+ object->internal = FALSE;
+ object->pager_trusted = FALSE;
+ /* copy strategy invalid until set by memory manager */
+ object->copy_strategy = MEMORY_OBJECT_COPY_INVALID;
+ }
/*
- * Look for an object associated with this port.
+ * Allocate request port.
*/
-Retry:
- lck = vm_object_hash_lock_spin(pager);
- do {
- entry = vm_object_hash_lookup(pager, FALSE);
-
- if (entry == VM_OBJECT_HASH_ENTRY_NULL) {
- if (new_object == VM_OBJECT_NULL) {
- /*
- * We must unlock to create a new object;
- * if we do so, we must try the lookup again.
- */
- vm_object_hash_unlock(lck);
- assert(new_entry == VM_OBJECT_HASH_ENTRY_NULL);
- new_entry = vm_object_hash_entry_alloc(pager);
- new_object = vm_object_allocate(size);
- /*
- * Set new_object->hashed now, while noone
- * knows about this object yet and we
- * don't need to lock it. Once it's in
- * the hash table, we would have to lock
- * the object to set its "hashed" bit and
- * we can't lock the object while holding
- * the hash lock as a spinlock...
- */
- new_object->hashed = TRUE;
- lck = vm_object_hash_lock_spin(pager);
- } else {
- /*
- * Lookup failed twice, and we have something
- * to insert; set the object.
- */
- /*
- * We can't lock the object here since we're
- * holding the hash lock as a spin lock.
- * We've already pre-set "new_object->hashed"
- * when we created "new_object" above, so we
- * won't need to modify the object in
- * vm_object_hash_insert().
- */
- assert(new_object->hashed);
- vm_object_hash_insert(new_entry, new_object);
- entry = new_entry;
- new_entry = VM_OBJECT_HASH_ENTRY_NULL;
- new_object = VM_OBJECT_NULL;
- must_init = TRUE;
- }
- } else if (entry->object == VM_OBJECT_NULL) {
- /*
- * If a previous object is being terminated,
- * we must wait for the termination message
- * to be queued (and lookup the entry again).
- */
- entry->waiting = TRUE;
- entry = VM_OBJECT_HASH_ENTRY_NULL;
- assert_wait((event_t) pager, THREAD_UNINT);
- vm_object_hash_unlock(lck);
-
- thread_block(THREAD_CONTINUE_NULL);
- lck = vm_object_hash_lock_spin(pager);
- }
- } while (entry == VM_OBJECT_HASH_ENTRY_NULL);
-
- object = entry->object;
- assert(object != VM_OBJECT_NULL);
-
- if (!must_init) {
- if ( !vm_object_lock_try(object)) {
-
- vm_object_hash_unlock(lck);
-
- try_failed_count++;
- mutex_pause(try_failed_count); /* wait a bit */
- goto Retry;
- }
- assert(!internal || object->internal);
-#if VM_OBJECT_CACHE
- if (object->ref_count == 0) {
- if ( !vm_object_cache_lock_try()) {
-
- vm_object_hash_unlock(lck);
- vm_object_unlock(object);
-
- try_failed_count++;
- mutex_pause(try_failed_count); /* wait a bit */
- goto Retry;
- }
- XPR(XPR_VM_OBJECT_CACHE,
- "vm_object_enter: removing %x from cache, head (%x, %x)\n",
- object,
- vm_object_cached_list.next,
- vm_object_cached_list.prev, 0,0);
- queue_remove(&vm_object_cached_list, object,
- vm_object_t, cached_list);
- vm_object_cached_count--;
-
- vm_object_cache_unlock();
- }
-#endif
- if (named) {
- assert(!object->named);
- object->named = TRUE;
- }
- vm_object_lock_assert_exclusive(object);
- object->ref_count++;
- vm_object_res_reference(object);
-
- vm_object_hash_unlock(lck);
- vm_object_unlock(object);
-
- VM_STAT_INCR(hits);
- } else
- vm_object_hash_unlock(lck);
- assert(object->ref_count > 0);
+ control = memory_object_control_allocate(object);
+ assert (control != MEMORY_OBJECT_CONTROL_NULL);
- VM_STAT_INCR(lookups);
+ vm_object_lock(object);
- XPR(XPR_VM_OBJECT,
- "vm_o_enter: pager 0x%x obj 0x%x must_init %d\n",
- pager, object, must_init, 0, 0);
+ assert(!object->pager_ready);
+ assert(!object->pager_initialized);
+ assert(object->pager == NULL);
+ assert(object->pager_control == NULL);
/*
- * If we raced to create a vm_object but lost, let's
- * throw away ours.
+ * Copy the reference we were given.
*/
- if (new_object != VM_OBJECT_NULL) {
- /*
- * Undo the pre-setting of "new_object->hashed" before
- * deallocating "new_object", since we did not insert it
- * into the hash table after all.
- */
- assert(new_object->hashed);
- new_object->hashed = FALSE;
- vm_object_deallocate(new_object);
- }
-
- if (new_entry != VM_OBJECT_HASH_ENTRY_NULL)
- vm_object_hash_entry_free(new_entry);
-
- if (must_init) {
- memory_object_control_t control;
-
- /*
- * Allocate request port.
- */
-
- control = memory_object_control_allocate(object);
- assert (control != MEMORY_OBJECT_CONTROL_NULL);
-
- vm_object_lock(object);
- assert(object != kernel_object);
-
- /*
- * Copy the reference we were given.
- */
-
- memory_object_reference(pager);
- object->pager_created = TRUE;
- object->pager = pager;
- object->internal = internal;
- object->pager_trusted = internal;
- if (!internal) {
- /* copy strategy invalid until set by memory manager */
- object->copy_strategy = MEMORY_OBJECT_COPY_INVALID;
- }
- object->pager_control = control;
- object->pager_ready = FALSE;
-
- vm_object_unlock(object);
-
- /*
- * Let the pager know we're using it.
- */
-
- (void) memory_object_init(pager,
- object->pager_control,
- PAGE_SIZE);
-
- vm_object_lock(object);
- if (named)
- object->named = TRUE;
- if (internal) {
- vm_object_lock_assert_exclusive(object);
- object->pager_ready = TRUE;
- vm_object_wakeup(object, VM_OBJECT_EVENT_PAGER_READY);
- }
+ memory_object_reference(pager);
+ object->pager_created = TRUE;
+ object->pager = pager;
+ object->pager_control = control;
+ object->pager_ready = FALSE;
- object->pager_initialized = TRUE;
- vm_object_wakeup(object, VM_OBJECT_EVENT_INITIALIZED);
- } else {
- vm_object_lock(object);
- }
+ vm_object_unlock(object);
/*
- * [At this point, the object must be locked]
+ * Let the pager know we're using it.
*/
- /*
- * Wait for the work above to be done by the first
- * thread to map this object.
- */
+ (void) memory_object_init(pager,
+ object->pager_control,
+ PAGE_SIZE);
- while (!object->pager_initialized) {
- vm_object_sleep(object,
- VM_OBJECT_EVENT_INITIALIZED,
- THREAD_UNINT);
+ vm_object_lock(object);
+ if (named)
+ object->named = TRUE;
+ if (object->internal) {
+ object->pager_ready = TRUE;
+ vm_object_wakeup(object, VM_OBJECT_EVENT_PAGER_READY);
}
+
+ object->pager_initialized = TRUE;
+ vm_object_wakeup(object, VM_OBJECT_EVENT_INITIALIZED);
+
vm_object_unlock(object);
- XPR(XPR_VM_OBJECT,
- "vm_object_enter: vm_object %x, memory_object %x, internal %d\n",
- object, object->pager, internal, 0,0);
- return(object);
+ return object;
}
/*
vm_object_t object)
{
memory_object_t pager;
- vm_object_hash_entry_t entry;
- lck_mtx_t *lck;
vm_object_t pager_object = VM_OBJECT_NULL;
assert(object != kernel_object);
* user will ever map this object.
*/
{
- assert(object->temporary);
-
/* create our new memory object */
assert((uint32_t) (object->vo_size/PAGE_SIZE) ==
(object->vo_size/PAGE_SIZE));
}
}
- entry = vm_object_hash_entry_alloc(pager);
-
- vm_object_lock(object);
- lck = vm_object_hash_lock_spin(pager);
- vm_object_hash_insert(entry, object);
- vm_object_hash_unlock(lck);
- vm_object_unlock(object);
-
/*
* A reference was returned by
* memory_object_create(), and it is
- * copied by vm_object_enter().
+ * copied by vm_object_memory_object_associate().
*/
- pager_object = vm_object_enter(pager, object->vo_size, TRUE, TRUE, FALSE);
-
+ pager_object = vm_object_memory_object_associate(pager,
+ object,
+ object->vo_size,
+ FALSE);
if (pager_object != object) {
panic("vm_object_compressor_pager_create: mismatch (pager: %p, pager_object: %p, orig_object: %p, orig_object size: 0x%llx)\n", pager, pager_object, object, (uint64_t) object->vo_size);
}
vm_object_paging_end(object);
}
-/*
- * Routine: vm_object_remove
- * Purpose:
- * Eliminate the pager/object association
- * for this pager.
- * Conditions:
- * The object cache must be locked.
- */
-__private_extern__ void
-vm_object_remove(
- vm_object_t object)
-{
- memory_object_t pager;
-
- if ((pager = object->pager) != MEMORY_OBJECT_NULL) {
- vm_object_hash_entry_t entry;
-
- entry = vm_object_hash_lookup(pager, FALSE);
- if (entry != VM_OBJECT_HASH_ENTRY_NULL)
- entry->object = VM_OBJECT_NULL;
- }
-
-}
-
/*
* Global variables for vm_object_collapse():
*
static boolean_t vm_object_collapse_allowed = TRUE;
static boolean_t vm_object_bypass_allowed = TRUE;
-unsigned long vm_object_collapse_encrypted = 0;
-
void vm_object_do_collapse_compressor(vm_object_t object,
vm_object_t backing_object);
void
if (p->offset < backing_offset || new_offset >= size) {
VM_PAGE_FREE(p);
} else {
- /*
- * ENCRYPTED SWAP:
- * The encryption key includes the "pager" and the
- * "paging_offset". These will not change during the
- * object collapse, so we can just move an encrypted
- * page from one object to the other in this case.
- * We can't decrypt the page here, since we can't drop
- * the object lock.
- */
- if (p->encrypted) {
- vm_object_collapse_encrypted++;
- }
pp = vm_page_lookup(object, new_offset);
if (pp == VM_PAGE_NULL) {
* Move the backing object's page
* up.
*/
- vm_page_rename(p, object, new_offset,
- TRUE);
+ vm_page_rename(p, object, new_offset);
}
} else {
assert(! pp->absent);
vm_object_do_collapse_compressor(object, backing_object);
} else if (backing_object->pager != MEMORY_OBJECT_NULL) {
- vm_object_hash_entry_t entry;
assert((!object->pager_created &&
(object->pager == MEMORY_OBJECT_NULL)) ||
assert(object->pager == NULL);
object->pager = backing_object->pager;
- if (backing_object->hashed) {
- lck_mtx_t *lck;
-
- lck = vm_object_hash_lock_spin(backing_object->pager);
- entry = vm_object_hash_lookup(object->pager, FALSE);
- assert(entry != VM_OBJECT_HASH_ENTRY_NULL);
- entry->object = object;
- vm_object_hash_unlock(lck);
-
- object->hashed = TRUE;
- }
object->pager_created = backing_object->pager_created;
object->pager_control = backing_object->pager_control;
object->pager_ready = backing_object->pager_ready;
}
VM_PAGE_SET_PHYS_PAGE(m, base_page);
}
- if (m->encrypted) {
- /*
- * we should never see this on a ficticious or private page
- */
- panic("vm_object_populate_with_private - %p encrypted", m);
- }
} else {
while ((m = vm_page_grab_fictitious()) == VM_PAGE_NULL)
return KERN_SUCCESS;
}
-/*
- * memory_object_free_from_cache:
- *
- * Walk the vm_object cache list, removing and freeing vm_objects
- * which are backed by the pager identified by the caller, (pager_ops).
- * Remove up to "count" objects, if there are that may available
- * in the cache.
- *
- * Walk the list at most once, return the number of vm_objects
- * actually freed.
- */
-
-__private_extern__ kern_return_t
-memory_object_free_from_cache(
- __unused host_t host,
- __unused memory_object_pager_ops_t pager_ops,
- int *count)
-{
-#if VM_OBJECT_CACHE
- int object_released = 0;
-
- vm_object_t object = VM_OBJECT_NULL;
- vm_object_t shadow;
-
-/*
- if(host == HOST_NULL)
- return(KERN_INVALID_ARGUMENT);
-*/
-
- try_again:
- vm_object_cache_lock();
-
- queue_iterate(&vm_object_cached_list, object,
- vm_object_t, cached_list) {
- if (object->pager &&
- (pager_ops == object->pager->mo_pager_ops)) {
- vm_object_lock(object);
- queue_remove(&vm_object_cached_list, object,
- vm_object_t, cached_list);
- vm_object_cached_count--;
-
- vm_object_cache_unlock();
- /*
- * Since this object is in the cache, we know
- * that it is initialized and has only a pager's
- * (implicit) reference. Take a reference to avoid
- * recursive deallocations.
- */
-
- assert(object->pager_initialized);
- assert(object->ref_count == 0);
- vm_object_lock_assert_exclusive(object);
- object->ref_count++;
-
- /*
- * Terminate the object.
- * If the object had a shadow, we let
- * vm_object_deallocate deallocate it.
- * "pageout" objects have a shadow, but
- * maintain a "paging reference" rather
- * than a normal reference.
- * (We are careful here to limit recursion.)
- */
- shadow = object->pageout?VM_OBJECT_NULL:object->shadow;
-
- if ((vm_object_terminate(object) == KERN_SUCCESS)
- && (shadow != VM_OBJECT_NULL)) {
- vm_object_deallocate(shadow);
- }
-
- if(object_released++ == *count)
- return KERN_SUCCESS;
- goto try_again;
- }
- }
- vm_object_cache_unlock();
- *count = object_released;
-#else
- *count = 0;
-#endif
- return KERN_SUCCESS;
-}
-
-
kern_return_t
memory_object_create_named(
memory_object_control_t *control)
{
vm_object_t object;
- vm_object_hash_entry_t entry;
- lck_mtx_t *lck;
*control = MEMORY_OBJECT_CONTROL_NULL;
if (pager == MEMORY_OBJECT_NULL)
return KERN_INVALID_ARGUMENT;
- lck = vm_object_hash_lock_spin(pager);
- entry = vm_object_hash_lookup(pager, FALSE);
-
- if ((entry != VM_OBJECT_HASH_ENTRY_NULL) &&
- (entry->object != VM_OBJECT_NULL)) {
- if (entry->object->named == TRUE)
- panic("memory_object_create_named: caller already holds the right"); }
- vm_object_hash_unlock(lck);
-
- if ((object = vm_object_enter(pager, size, FALSE, FALSE, TRUE)) == VM_OBJECT_NULL) {
- return(KERN_INVALID_OBJECT);
+ object = vm_object_memory_object_associate(pager,
+ VM_OBJECT_NULL,
+ size,
+ TRUE);
+ if (object == VM_OBJECT_NULL) {
+ return KERN_INVALID_OBJECT;
}
/* wait for object (if any) to be ready */
vm_object_unlock(object);
return KERN_SUCCESS;
}
-#if VM_OBJECT_CACHE
- if ((object->ref_count == 0) && (!object->terminating)) {
- if (!vm_object_cache_lock_try()) {
- vm_object_unlock(object);
- goto restart;
- }
- queue_remove(&vm_object_cached_list, object,
- vm_object_t, cached_list);
- vm_object_cached_count--;
- XPR(XPR_VM_OBJECT_CACHE,
- "memory_object_recover_named: removing %X, head (%X, %X)\n",
- object,
- vm_object_cached_list.next,
- vm_object_cached_list.prev, 0,0);
-
- vm_object_cache_unlock();
- }
-#endif
object->named = TRUE;
vm_object_lock_assert_exclusive(object);
object->ref_count++;
return KERN_SUCCESS;
}
+ if (control == VM_PURGABLE_SET_STATE &&
+ object->purgeable_only_by_kernel) {
+ return KERN_PROTECTION_FAILURE;
+ }
+
+ if (control != VM_PURGABLE_SET_STATE &&
+ control != VM_PURGABLE_SET_STATE_FROM_KERNEL) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
if ((*state) & VM_PURGABLE_DEBUG_EMPTY) {
object->volatile_empty = TRUE;
}
switch (new_state) {
case VM_PURGABLE_DENY:
+ /*
+ * Attempting to convert purgeable memory to non-purgeable:
+ * not allowed.
+ */
+ return KERN_INVALID_ARGUMENT;
case VM_PURGABLE_NONVOLATILE:
object->purgable = new_state;
vm_object_unlock(object);
}
-#ifdef MACH_BSD
-/*
- * Scale the vm_object_cache
- * This is required to make sure that the vm_object_cache is big
- * enough to effectively cache the mapped file.
- * This is really important with UBC as all the regular file vnodes
- * have memory object associated with them. Havving this cache too
- * small results in rapid reclaim of vnodes and hurts performance a LOT!
- *
- * This is also needed as number of vnodes can be dynamically scaled.
- */
-kern_return_t
-adjust_vm_object_cache(
- __unused vm_size_t oval,
- __unused vm_size_t nval)
-{
-#if VM_OBJECT_CACHE
- vm_object_cached_max = nval;
- vm_object_cache_trim(FALSE);
-#endif
- return (KERN_SUCCESS);
-}
-#endif /* MACH_BSD */
-
-
/*
* vm_object_transpose
*
boolean_t object1_locked, object2_locked;
vm_page_t page;
vm_object_offset_t page_offset;
- lck_mtx_t *hash_lck;
- vm_object_hash_entry_t hash_entry;
tmp_object = VM_OBJECT_NULL;
object1_locked = FALSE; object2_locked = FALSE;
*/
while (!vm_page_queue_empty(&object2->memq)) {
page = (vm_page_t) vm_page_queue_first(&object2->memq);
- vm_page_rename(page, object1, page->offset, FALSE);
+ vm_page_rename(page, object1, page->offset);
}
assert(vm_page_queue_empty(&object2->memq));
} else if (object2->phys_contiguous || vm_page_queue_empty(&object2->memq)) {
*/
while (!vm_page_queue_empty(&object1->memq)) {
page = (vm_page_t) vm_page_queue_first(&object1->memq);
- vm_page_rename(page, object2, page->offset, FALSE);
+ vm_page_rename(page, object2, page->offset);
}
assert(vm_page_queue_empty(&object1->memq));
} else {
/* transfer object2's pages to object1 */
while (!vm_page_queue_empty(&object2->memq)) {
page = (vm_page_t) vm_page_queue_first(&object2->memq);
- vm_page_rename(page, object1, page->offset, FALSE);
+ vm_page_rename(page, object1, page->offset);
}
assert(vm_page_queue_empty(&object2->memq));
/* transfer tmp_object's pages to object2 */
assert(object1->vo_size == object2->vo_size);
/* "memq_hint" was updated above when transposing pages */
/* "ref_count" refers to the object not its contents */
+ assert(object1->ref_count >= 1);
+ assert(object2->ref_count >= 1);
#if TASK_SWAPPER
/* "res_count" refers to the object not its contents */
#endif
__TRANSPOSE_FIELD(pager_trusted);
__TRANSPOSE_FIELD(can_persist);
__TRANSPOSE_FIELD(internal);
- __TRANSPOSE_FIELD(temporary);
__TRANSPOSE_FIELD(private);
__TRANSPOSE_FIELD(pageout);
/* "alive" should be set */
assert(object2->purgable == VM_PURGABLE_DENY);
/* "shadowed" refers to the the object not its contents */
__TRANSPOSE_FIELD(purgeable_when_ripe);
- __TRANSPOSE_FIELD(advisory_pageout);
__TRANSPOSE_FIELD(true_share);
/* "terminating" should not be set */
assert(!object1->terminating);
assert(!object2->terminating);
+ /* transfer "named" reference if needed */
+ if (object1->named && !object2->named) {
+ assert(object1->ref_count >= 2);
+ assert(object2->ref_count >= 1);
+ object1->ref_count--;
+ object2->ref_count++;
+ } else if (!object1->named && object2->named) {
+ assert(object1->ref_count >= 1);
+ assert(object2->ref_count >= 2);
+ object1->ref_count++;
+ object2->ref_count--;
+ }
__TRANSPOSE_FIELD(named);
/* "shadow_severed" refers to the object not its contents */
__TRANSPOSE_FIELD(phys_contiguous);
/* "cached_list.prev" should be NULL */
assert(object1->cached_list.prev == NULL);
assert(object2->cached_list.prev == NULL);
- /* "msr_q" is linked to the object not its contents */
- assert(queue_empty(&object1->msr_q));
- assert(queue_empty(&object2->msr_q));
__TRANSPOSE_FIELD(last_alloc);
__TRANSPOSE_FIELD(sequential);
__TRANSPOSE_FIELD(pages_created);
__TRANSPOSE_FIELD(pages_used);
__TRANSPOSE_FIELD(scan_collisions);
__TRANSPOSE_FIELD(cow_hint);
-#if MACH_ASSERT
- __TRANSPOSE_FIELD(paging_object);
-#endif
__TRANSPOSE_FIELD(wimg_bits);
__TRANSPOSE_FIELD(set_cache_attr);
__TRANSPOSE_FIELD(code_signed);
- if (object1->hashed) {
- hash_lck = vm_object_hash_lock_spin(object2->pager);
- hash_entry = vm_object_hash_lookup(object2->pager, FALSE);
- assert(hash_entry != VM_OBJECT_HASH_ENTRY_NULL);
- hash_entry->object = object2;
- vm_object_hash_unlock(hash_lck);
- }
- if (object2->hashed) {
- hash_lck = vm_object_hash_lock_spin(object1->pager);
- hash_entry = vm_object_hash_lookup(object1->pager, FALSE);
- assert(hash_entry != VM_OBJECT_HASH_ENTRY_NULL);
- hash_entry->object = object1;
- vm_object_hash_unlock(hash_lck);
- }
- __TRANSPOSE_FIELD(hashed);
object1->transposed = TRUE;
object2->transposed = TRUE;
__TRANSPOSE_FIELD(mapping_in_progress);
*
*/
extern int speculative_reads_disabled;
-extern int ignore_is_ssd;
/*
* Try to always keep these values an even multiple of PAGE_SIZE. We use these values
* that could give us non-page-size aligned values if we start out with values that
* are odd multiples of PAGE_SIZE.
*/
+#if CONFIG_EMBEDDED
+ unsigned int preheat_max_bytes = (1024 * 512);
+#else /* CONFIG_EMBEDDED */
unsigned int preheat_max_bytes = MAX_UPL_TRANSFER_BYTES;
+#endif /* CONFIG_EMBEDDED */
unsigned int preheat_min_bytes = (1024 * 32);
if (object->pager == MEMORY_OBJECT_NULL)
goto out; /* pager is gone for this object, nothing more to do */
- if (!ignore_is_ssd)
- vnode_pager_get_isSSD(object->pager, &isSSD);
+ vnode_pager_get_isSSD(object->pager, &isSSD);
min_ph_size = round_page(preheat_min_bytes);
max_ph_size = round_page(preheat_max_bytes);
+#if !CONFIG_EMBEDDED
if (isSSD) {
min_ph_size /= 2;
max_ph_size /= 8;
max_ph_size = trunc_page(max_ph_size);
}
}
+#endif /* !CONFIG_EMBEDDED */
if (min_ph_size < PAGE_SIZE)
min_ph_size = PAGE_SIZE;
PAGE_WAKEUP(dst_page);
}
}
-
- if (dst_page->encrypted) {
- /*
- * ENCRYPTED SWAP:
- * We need to decrypt this encrypted page before the
- * caller can access its contents.
- * But if the caller really wants to access the page's
- * contents, they have to keep the page "busy".
- * Otherwise, the page could get recycled or re-encrypted
- * at any time.
- */
- if ((ops & UPL_POP_SET) && (ops & UPL_POP_BUSY) &&
- dst_page->busy) {
- /*
- * The page is stable enough to be accessed by
- * the caller, so make sure its contents are
- * not encrypted.
- */
- vm_page_decrypt(dst_page, 0);
- } else {
- /*
- * The page is not busy, so don't bother
- * decrypting it, since anything could
- * happen to it between now and when the
- * caller wants to access it.
- * We should not give the caller access
- * to this page.
- */
- assert(!phys_entry);
- }
- }
-
if (phys_entry) {
/*
* The physical page number will remain valid
* only if the page is kept busy.
- * ENCRYPTED SWAP: make sure we don't let the
- * caller access an encrypted page.
*/
assert(dst_page->busy);
- assert(!dst_page->encrypted);
*phys_entry = VM_PAGE_GET_PHYS_PAGE(dst_page);
}
lck_rw_lock_shared(&object->Lock);
}
+boolean_t
+vm_object_lock_yield_shared(vm_object_t object)
+{
+ boolean_t retval = FALSE, force_yield = FALSE;;
+
+ vm_object_lock_assert_shared(object);
+
+ force_yield = vm_object_lock_avoid(object);
+
+ retval = lck_rw_lock_yield_shared(&object->Lock, force_yield);
+
+ return (retval);
+}
+
boolean_t
vm_object_lock_try_shared(vm_object_t object)
{
{
vm_page_t p, next;
struct vm_pageout_queue *iq;
- boolean_t need_unlock = TRUE;
if (!VM_CONFIG_COMPRESSOR_IS_PRESENT)
return;
assert(p->vm_page_q_state != VM_PAGE_ON_FREE_Q);
if ((p->vm_page_q_state == VM_PAGE_ON_THROTTLED_Q) ||
- p->encrypted_cleaning ||
p->cleaning ||
p->laundry ||
p->busy ||
/* Throw to the pageout queue */
vm_page_lockspin_queues();
- need_unlock = TRUE;
if (vm_compressor_low_on_space()) {
vm_page_unlock_queues();
VM_PAGE_FREE(p);
continue;
}
-
vm_page_queues_remove(p, TRUE);
- if (vm_pageout_cluster(p, FALSE, TRUE))
- need_unlock = FALSE;
-
- if (need_unlock == TRUE)
- vm_page_unlock_queues();
+ vm_pageout_cluster(p);
+
+ vm_page_unlock_queues();
}
-
vm_object_unlock(object);
}
projects / apple / xnu.git / blobdiff