X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/89b3af67bb32e691275bf6fa803d1834b2284115..0b4c1975fb5e4eccf1012a35081f7e7799b81046:/osfmk/kern/hibernate.c diff --git a/osfmk/kern/hibernate.c b/osfmk/kern/hibernate.c index 96c0275e1..b56317bf9 100644 --- a/osfmk/kern/hibernate.c +++ b/osfmk/kern/hibernate.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2004 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2004-2005 Apple Computer, Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * @@ -36,341 +36,32 @@ #include #include #include -#define KERNEL #include #include #include - -/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ - -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 last_bit; - - bzero((void *) &bitmap->bitmap[0], bitmap->bitmapwords << 2); - // set out-of-bound bits at end of bitmap. - last_bit = ((bitmap->last_page - bitmap->first_page + 1) & 31); - if (last_bit) - bitmap->bitmap[bitmap->bitmapwords - 1] = (0xFFFFFFFF >> last_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. -*/ -extern vm_page_t vm_lopage_queue_free; - -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; - } - - m = (vm_page_t) vm_lopage_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); -} +#include /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ kern_return_t hibernate_setup(IOHibernateImageHeader * header, - uint32_t free_page_ratio, - uint32_t free_page_time, + uint32_t free_page_ratio, + uint32_t free_page_time, + boolean_t vmflush, hibernate_page_list_t ** page_list_ret, hibernate_page_list_t ** page_list_wired_ret, boolean_t * encryptedswap) { hibernate_page_list_t * page_list = NULL; hibernate_page_list_t * page_list_wired = NULL; - vm_page_t m; - uint32_t i, gobble_count; + uint32_t gobble_count; *page_list_ret = NULL; *page_list_wired_ret = NULL; - + + if (vmflush) + hibernate_flush_memory(); page_list = hibernate_page_list_allocate(); if (!page_list) @@ -385,43 +76,17 @@ hibernate_setup(IOHibernateImageHeader * header, *encryptedswap = dp_encryption; // pages we could force out to reduce hibernate image size - gobble_count = (((uint64_t) page_list->page_count) * ((uint64_t) free_page_ratio)) / 100; + gobble_count = (uint32_t)((((uint64_t) page_list->page_count) * ((uint64_t) free_page_ratio)) / 100); // no failures hereafter hibernate_processor_setup(header); - HIBLOG("hibernate_alloc_pages flags %08lx, gobbling %d pages\n", + HIBLOG("hibernate_alloc_pages flags %08x, gobbling %d pages\n", header->processorFlags, gobble_count); if (gobble_count) - { - uint64_t start, end, timeout, nsec; - clock_interval_to_deadline(free_page_time, 1000 * 1000 /*ms*/, &timeout); - clock_get_uptime(&start); - - for (i = 0; i < gobble_count; i++) - { - while (VM_PAGE_NULL == (m = vm_page_grab())) - { - clock_get_uptime(&end); - if (end >= timeout) - break; - VM_PAGE_WAIT(); - } - if (!m) - break; - m->busy = FALSE; - vm_page_gobble(m); - - m->pageq.next = (queue_entry_t) hibernate_gobble_queue; - hibernate_gobble_queue = m; - } - - clock_get_uptime(&end); - absolutetime_to_nanoseconds(end - start, &nsec); - HIBLOG("Gobbled %d pages, time: %qd ms\n", i, nsec / 1000000ULL); - } + hibernate_gobble_pages(gobble_count, free_page_time); *page_list_ret = page_list; *page_list_wired_ret = page_list_wired; @@ -433,21 +98,7 @@ kern_return_t hibernate_teardown(hibernate_page_list_t * page_list, hibernate_page_list_t * page_list_wired) { - vm_page_t m, next; - uint32_t count = 0; - - m = (vm_page_t) hibernate_gobble_queue; - while(m) - { - next = (vm_page_t) m->pageq.next; - vm_page_free(m); - count++; - m = next; - } - hibernate_gobble_queue = VM_PAGE_NULL; - - if (count) - HIBLOG("Freed %d pages\n", count); + hibernate_free_gobble_pages(); if (page_list) kfree(page_list, page_list->list_size);