diff options
Diffstat (limited to 'vm')
| -rw-r--r-- | vm/vm_page.c | 14 | ||||
| -rw-r--r-- | vm/vm_page.h | 3 | ||||
| -rw-r--r-- | vm/vm_pageout.c | 30 | ||||
| -rw-r--r-- | vm/vm_resident.c | 23 |
4 files changed, 44 insertions, 26 deletions
diff --git a/vm/vm_page.c b/vm/vm_page.c index 94439b51..92e36a1a 100644 --- a/vm/vm_page.c +++ b/vm/vm_page.c @@ -925,12 +925,6 @@ vm_page_seg_pull_cache_page(struct vm_page_seg *seg, } static boolean_t -vm_page_seg_min_page_available(const struct vm_page_seg *seg) -{ - return (seg->nr_free_pages > seg->min_free_pages); -} - -static boolean_t vm_page_seg_page_available(const struct vm_page_seg *seg) { return (seg->nr_free_pages > seg->high_free_pages); @@ -1099,6 +1093,7 @@ vm_page_seg_evict(struct vm_page_seg *seg, boolean_t external_only, page = NULL; object = NULL; + laundry = FALSE; restart: vm_page_lock_queues(); @@ -1156,6 +1151,7 @@ restart: */ assert(!page->laundry); + assert(!(laundry && page->external)); if (object->internal || !alloc_paused) { laundry = FALSE; @@ -1878,7 +1874,7 @@ vm_page_check_usable(void) } } - vm_page_external_pagedout = -1; + vm_page_external_laundry_count = -1; vm_page_alloc_paused = FALSE; thread_wakeup(&vm_page_alloc_paused); return TRUE; @@ -1980,7 +1976,7 @@ vm_page_evict(boolean_t *should_wait) external_only = TRUE; simple_lock(&vm_page_queue_free_lock); - vm_page_external_pagedout = 0; + vm_page_external_laundry_count = 0; alloc_paused = vm_page_alloc_paused; simple_unlock(&vm_page_queue_free_lock); @@ -2008,7 +2004,7 @@ again: * Keep in mind eviction may not cause pageouts, since non-precious * clean pages are simply released. */ - if ((vm_page_external_pagedout == 0) && (vm_page_laundry_count == 0)) { + if ((vm_page_laundry_count == 0) && (vm_page_external_laundry_count == 0)) { /* * No pageout, but some clean pages were freed. Start a complete * scan again without waiting. diff --git a/vm/vm_page.h b/vm/vm_page.h index eb684c1b..2a0ad2c2 100644 --- a/vm/vm_page.h +++ b/vm/vm_page.h @@ -105,6 +105,7 @@ struct vm_page { /* boolean_t */ inactive:1, /* page is in inactive list (P) */ active:1, /* page is in active list (P) */ laundry:1, /* page is being cleaned now (P)*/ + external_laundry:1, /* same as laundry for external pagers (P)*/ free:1, /* page is on free list (P) */ reference:1, /* page has been used (P) */ external:1, /* page in external object (P) */ @@ -165,7 +166,7 @@ int vm_page_wire_count; /* How many pages are wired? */ extern int vm_page_laundry_count; /* How many pages being laundered? */ extern -int vm_page_external_pagedout; /* How many external pages being paged out? */ +int vm_page_external_laundry_count; /* How many external pages being paged out? */ decl_simple_lock_data(extern,vm_page_queue_lock)/* lock on active and inactive page queues */ diff --git a/vm/vm_pageout.c b/vm/vm_pageout.c index 85db021e..7dc9c12f 100644 --- a/vm/vm_pageout.c +++ b/vm/vm_pageout.c @@ -46,6 +46,7 @@ #include <kern/slab.h> #include <kern/task.h> #include <kern/thread.h> +#include <kern/printf.h> #include <vm/pmap.h> #include <vm/vm_map.h> #include <vm/vm_object.h> @@ -53,6 +54,13 @@ #include <vm/vm_pageout.h> #include <machine/locore.h> +#define DEBUG 0 + +/* + * Maximum delay, in milliseconds, between two pageout scans. + */ +#define VM_PAGEOUT_TIMEOUT 50 + /* * Event placeholder for pageout requests, synchronized with * the free page queue lock. @@ -251,17 +259,19 @@ vm_pageout_setup( vm_page_wire(m); } else { - vm_page_activate(m); + m->external_laundry = TRUE; /* - * If vm_page_external_pagedout is negative, + * If vm_page_external_laundry_count is negative, * the pageout daemon isn't expecting to be * notified. */ - if (vm_page_external_pagedout >= 0) { - vm_page_external_pagedout++; + if (vm_page_external_laundry_count >= 0) { + vm_page_external_laundry_count++; } + + vm_page_activate(m); } vm_page_unlock_queues(); @@ -460,9 +470,19 @@ void vm_pageout(void) FALSE); } else if (should_wait) { assert_wait(&vm_pageout_continue, FALSE); - thread_set_timeout(500); + thread_set_timeout(VM_PAGEOUT_TIMEOUT); simple_unlock(&vm_page_queue_free_lock); thread_block(NULL); + +#if DEBUG + if (current_thread()->wait_result != THREAD_AWAKENED) { + printf("vm_pageout: timeout," + " vm_page_laundry_count:%d" + " vm_page_external_laundry_count:%d\n", + vm_page_laundry_count, + vm_page_external_laundry_count); + } +#endif } else { simple_unlock(&vm_page_queue_free_lock); } diff --git a/vm/vm_resident.c b/vm/vm_resident.c index e3e34dc3..b5096e00 100644 --- a/vm/vm_resident.c +++ b/vm/vm_resident.c @@ -140,7 +140,7 @@ int vm_page_wire_count; * pageout daemon. */ int vm_page_laundry_count = 0; -int vm_page_external_pagedout = 0; +int vm_page_external_laundry_count = 0; /* @@ -611,6 +611,7 @@ static void vm_page_init_template(vm_page_t m) m->inactive = FALSE; m->active = FALSE; m->laundry = FALSE; + m->external_laundry = FALSE; m->free = FALSE; m->external = FALSE; @@ -811,7 +812,7 @@ phys_addr_t vm_page_grab_phys_addr(void) void vm_page_release( vm_page_t mem, boolean_t laundry, - boolean_t external) + boolean_t external_laundry) { simple_lock(&vm_page_queue_free_lock); if (mem->free) @@ -825,20 +826,20 @@ void vm_page_release( vm_pageout_resume(); } } - if (external) { + if (external_laundry) { /* - * If vm_page_external_pagedout is negative, + * If vm_page_external_laundry_count is negative, * the pageout daemon isn't expecting to be * notified. */ - if (vm_page_external_pagedout > 0) { - vm_page_external_pagedout--; - } + if (vm_page_external_laundry_count > 0) { + vm_page_external_laundry_count--; - if (vm_page_external_pagedout == 0) { - vm_pageout_resume(); + if (vm_page_external_laundry_count == 0) { + vm_pageout_resume(); + } } } @@ -977,9 +978,9 @@ void vm_page_free( vm_page_release_fictitious(mem); } else { boolean_t laundry = mem->laundry; - boolean_t external = mem->external; + boolean_t external_laundry = mem->external_laundry; vm_page_init(mem); - vm_page_release(mem, laundry, external); + vm_page_release(mem, laundry, external_laundry); } } |