-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-static vm_page_t hibernate_gobble_queue;
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-static void
-hibernate_page_list_zero(hibernate_page_list_t *list)
-{
- uint32_t bank;
- hibernate_bitmap_t * bitmap;
-
- bitmap = &list->bank_bitmap[0];
- for (bank = 0; bank < list->bank_count; bank++)
- {
- uint32_t bit, last_bit;
- uint32_t *bitmap_word;
-
- bzero((void *) &bitmap->bitmap[0], bitmap->bitmapwords << 2);
-
- // Set out-of-bound bits at end of bitmap.
- bitmap_word = &bitmap->bitmap[bitmap->bitmapwords - 1];
- last_bit = ((bitmap->last_page - bitmap->first_page) & 31);
- for (bit = 31; bit > last_bit; bit--) {
- *bitmap_word |= (0x80000000 >> bit);
- }
-
- bitmap = (hibernate_bitmap_t *) &bitmap->bitmap[bitmap->bitmapwords];
- }
-}
-
-
-static boolean_t
-consider_discard(vm_page_t m)
-{
- register vm_object_t object = 0;
- int refmod_state;
- boolean_t discard = FALSE;
-
- do
- {
- if(m->private)
- panic("consider_discard: private");
-
- if (!vm_object_lock_try(m->object))
- break;
-
- object = m->object;
-
- if (m->wire_count != 0)
- break;
- if (m->precious)
- break;
-
- if (m->busy || !object->alive)
- /*
- * Somebody is playing with this page.
- */
- break;
-
- if (m->absent || m->unusual || m->error)
- /*
- * If it's unusual in anyway, ignore it
- */
- break;
-
- if (m->cleaning)
- break;
-
- if (!m->dirty)
- {
- refmod_state = pmap_get_refmod(m->phys_page);
-
- if (refmod_state & VM_MEM_REFERENCED)
- m->reference = TRUE;
- if (refmod_state & VM_MEM_MODIFIED)
- m->dirty = TRUE;
- }
-
- /*
- * If it's clean we can discard the page on wakeup.
- */
- discard = !m->dirty;
- }
- while (FALSE);
-
- if (object)
- vm_object_unlock(object);
-
- return (discard);
-}
-
-
-static void
-discard_page(vm_page_t m)
-{
- if (m->absent || m->unusual || m->error)
- /*
- * If it's unusual in anyway, ignore
- */
- return;
-
- if (!m->no_isync)
- {
- int refmod_state = pmap_disconnect(m->phys_page);
-
- if (refmod_state & VM_MEM_REFERENCED)
- m->reference = TRUE;
- if (refmod_state & VM_MEM_MODIFIED)
- m->dirty = TRUE;
- }
-
- if (m->dirty)
- panic("discard_page(%p) dirty", m);
- if (m->laundry)
- panic("discard_page(%p) laundry", m);
- if (m->private)
- panic("discard_page(%p) private", m);
- if (m->fictitious)
- panic("discard_page(%p) fictitious", m);
-
- vm_page_free(m);
-}
-
-/*
- Bits zero in the bitmaps => needs to be saved. All pages default to be saved,
- pages known to VM to not need saving are subtracted.
- Wired pages to be saved are present in page_list_wired, pageable in page_list.
-*/
-
-void
-hibernate_page_list_setall(hibernate_page_list_t * page_list,
- hibernate_page_list_t * page_list_wired,
- uint32_t * pagesOut)
-{
- uint64_t start, end, nsec;
- vm_page_t m;
- uint32_t pages = page_list->page_count;
- uint32_t count_zf = 0, count_inactive = 0, count_active = 0;
- uint32_t count_wire = pages;
- uint32_t count_discard_active = 0, count_discard_inactive = 0;
- uint32_t i;
-
- HIBLOG("hibernate_page_list_setall start\n");
-
- clock_get_uptime(&start);
-
- hibernate_page_list_zero(page_list);
- hibernate_page_list_zero(page_list_wired);
-
- m = (vm_page_t) hibernate_gobble_queue;
- while(m)
- {
- pages--;
- count_wire--;
- hibernate_page_bitset(page_list, TRUE, m->phys_page);
- hibernate_page_bitset(page_list_wired, TRUE, m->phys_page);
- m = (vm_page_t) m->pageq.next;
- }
-
- m = (vm_page_t) vm_page_queue_free;
- while(m)
- {
- pages--;
- count_wire--;
- hibernate_page_bitset(page_list, TRUE, m->phys_page);
- hibernate_page_bitset(page_list_wired, TRUE, m->phys_page);
- m = (vm_page_t) m->pageq.next;
- }
-
- queue_iterate( &vm_page_queue_zf,
- m,
- vm_page_t,
- pageq )
- {
- if ((kIOHibernateModeDiscardCleanInactive & gIOHibernateMode)
- && consider_discard(m))
- {
- hibernate_page_bitset(page_list, TRUE, m->phys_page);
- count_discard_inactive++;
- }
- else
- count_zf++;
- count_wire--;
- hibernate_page_bitset(page_list_wired, TRUE, m->phys_page);
- }
-
- queue_iterate( &vm_page_queue_inactive,
- m,
- vm_page_t,
- pageq )
- {
- if ((kIOHibernateModeDiscardCleanInactive & gIOHibernateMode)
- && consider_discard(m))
- {
- hibernate_page_bitset(page_list, TRUE, m->phys_page);
- count_discard_inactive++;
- }
- else
- count_inactive++;
- count_wire--;
- hibernate_page_bitset(page_list_wired, TRUE, m->phys_page);
- }
-
- queue_iterate( &vm_page_queue_active,
- m,
- vm_page_t,
- pageq )
- {
- if ((kIOHibernateModeDiscardCleanActive & gIOHibernateMode)
- && consider_discard(m))
- {
- hibernate_page_bitset(page_list, TRUE, m->phys_page);
- count_discard_active++;
- }
- else
- count_active++;
- count_wire--;
- hibernate_page_bitset(page_list_wired, TRUE, m->phys_page);
- }
-
- // pull wired from hibernate_bitmap
-
- uint32_t bank;
- hibernate_bitmap_t * bitmap;
- hibernate_bitmap_t * bitmap_wired;
-
- bitmap = &page_list->bank_bitmap[0];
- bitmap_wired = &page_list_wired->bank_bitmap[0];
- for (bank = 0; bank < page_list->bank_count; bank++)
- {
- for (i = 0; i < bitmap->bitmapwords; i++)
- bitmap->bitmap[i] = bitmap->bitmap[i] | ~bitmap_wired->bitmap[i];
- bitmap = (hibernate_bitmap_t *) &bitmap->bitmap [bitmap->bitmapwords];
- bitmap_wired = (hibernate_bitmap_t *) &bitmap_wired->bitmap[bitmap_wired->bitmapwords];
- }
-
- // machine dependent adjustments
- hibernate_page_list_setall_machine(page_list, page_list_wired, &pages);
-
- clock_get_uptime(&end);
- absolutetime_to_nanoseconds(end - start, &nsec);
- HIBLOG("hibernate_page_list_setall time: %qd ms\n", nsec / 1000000ULL);
-
- HIBLOG("pages %d, wire %d, act %d, inact %d, zf %d, could discard act %d inact %d\n",
- pages, count_wire, count_active, count_inactive, count_zf,
- count_discard_active, count_discard_inactive);
-
- *pagesOut = pages;
-}
-
-void
-hibernate_page_list_discard(hibernate_page_list_t * page_list)
-{
- uint64_t start, end, nsec;
- vm_page_t m;
- vm_page_t next;
- uint32_t count_discard_active = 0, count_discard_inactive = 0;
-
- clock_get_uptime(&start);
-
- m = (vm_page_t) queue_first(&vm_page_queue_zf);
- while (m && !queue_end(&vm_page_queue_zf, (queue_entry_t)m))
- {
- next = (vm_page_t) m->pageq.next;
- if (hibernate_page_bittst(page_list, m->phys_page))
- {
- discard_page(m);
- count_discard_inactive++;
- }
- m = next;
- }
-
- m = (vm_page_t) queue_first(&vm_page_queue_inactive);
- while (m && !queue_end(&vm_page_queue_inactive, (queue_entry_t)m))
- {
- next = (vm_page_t) m->pageq.next;
- if (hibernate_page_bittst(page_list, m->phys_page))
- {
- discard_page(m);
- count_discard_inactive++;
- }
- m = next;
- }
-
- m = (vm_page_t) queue_first(&vm_page_queue_active);
- while (m && !queue_end(&vm_page_queue_active, (queue_entry_t)m))
- {
- next = (vm_page_t) m->pageq.next;
- if (hibernate_page_bittst(page_list, m->phys_page))
- {
- discard_page(m);
- count_discard_active++;
- }
- m = next;
- }
-
- clock_get_uptime(&end);
- absolutetime_to_nanoseconds(end - start, &nsec);
- HIBLOG("hibernate_page_list_discard time: %qd ms, discarded act %d inact %d\n",
- nsec / 1000000ULL,
- count_discard_active, count_discard_inactive);
-}
projects / apple / xnu.git / blobdiff