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head/sys/vm/vm_pageout.c
| Show First 20 Lines • Show All 1,301 Lines • ▼ Show 20 Lines | if (object->ref_count != 0) | ||||
| act_delta = pmap_ts_referenced(m); | act_delta = pmap_ts_referenced(m); | ||||
| else | else | ||||
| act_delta = 0; | act_delta = 0; | ||||
| if ((m->a.flags & PGA_REFERENCED) != 0) { | if ((m->a.flags & PGA_REFERENCED) != 0) { | ||||
| vm_page_aflag_clear(m, PGA_REFERENCED); | vm_page_aflag_clear(m, PGA_REFERENCED); | ||||
| act_delta++; | act_delta++; | ||||
| } | } | ||||
| /* Deferred free of swap space. */ | |||||
| if ((m->a.flags & PGA_SWAP_FREE) != 0 && | |||||
| VM_OBJECT_TRYWLOCK(object)) { | |||||
| if (m->object == object) | |||||
| vm_pager_page_unswapped(m); | |||||
| VM_OBJECT_WUNLOCK(object); | |||||
| } | |||||
| /* | /* | ||||
| * Advance or decay the act_count based on recent usage. | * Advance or decay the act_count based on recent usage. | ||||
| */ | */ | ||||
| if (act_delta != 0) { | if (act_delta != 0) { | ||||
| m->a.act_count += ACT_ADVANCE + act_delta; | m->a.act_count += ACT_ADVANCE + act_delta; | ||||
| if (m->a.act_count > ACT_MAX) | if (m->a.act_count > ACT_MAX) | ||||
| m->a.act_count = ACT_MAX; | m->a.act_count = ACT_MAX; | ||||
| } else | } else | ||||
| ▲ Show 20 Lines • Show All 218 Lines • ▼ Show 20 Lines | if (vm_page_tryxbusy(m) == 0) { | ||||
| * are being paged out and will leave the | * are being paged out and will leave the | ||||
| * queue shortly after the scan finishes. So, | * queue shortly after the scan finishes. So, | ||||
| * they ought to be discounted from the | * they ought to be discounted from the | ||||
| * inactive count. | * inactive count. | ||||
| */ | */ | ||||
| addl_page_shortage++; | addl_page_shortage++; | ||||
| goto reinsert; | goto reinsert; | ||||
| } | } | ||||
| /* Deferred free of swap space. */ | |||||
| if ((m->a.flags & PGA_SWAP_FREE) != 0) | |||||
| vm_pager_page_unswapped(m); | |||||
| /* | /* | ||||
| * Re-check for wirings now that we hold the object lock and | * Re-check for wirings now that we hold the object lock and | ||||
| * have verified that the page is unbusied. If the page is | * have verified that the page is unbusied. If the page is | ||||
| * mapped, it may still be wired by pmap lookups. The call to | * mapped, it may still be wired by pmap lookups. The call to | ||||
| * vm_page_try_remove_all() below atomically checks for such | * vm_page_try_remove_all() below atomically checks for such | ||||
| * wirings and removes mappings. If the page is unmapped, the | * wirings and removes mappings. If the page is unmapped, the | ||||
| * wire count is guaranteed not to increase. | * wire count is guaranteed not to increase. | ||||
| ▲ Show 20 Lines • Show All 713 Lines • Show Last 20 Lines | |||||