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static inline void del_page_from_lru(struct zone *zone, struct page *page) { enum lru_list l; list_del(&page->lru); if (PageUnevictable(page)) { __ClearPageUnevictable(page); l = LRU_UNEVICTABLE; } else { l = page_lru_base_type(page); if (PageActive(page)) { __ClearPageActive(page); l += LRU_ACTIVE; } } __dec_zone_state(zone, NR_LRU_BASE + l); mem_cgroup_del_lru_list(page, l); } /** * page_lru - which LRU list should a page be on? * @page: the page to test * * Returns the LRU list a page should be on, as an index * into the array of LRU lists. */ static inline enum lru_list page_lru(struct page *page) { enum lru_list lru; if (PageUnevictable(page)) lru = LRU_UNEVICTABLE; else { lru = page_lru_base_type(page); if (PageActive(page)) lru += LRU_ACTIVE; } return lru; } /** * page_is_file_cache - should the page be on a file LRU or anon LRU? * @page: the page to test * * Returns 1 if @page is page cache page backed by a regular filesystem, * or 0 if @page is anonymous, tmpfs or otherwise ram or swap backed. * Used by functions that manipulate the LRU lists, to sort a page * onto the right LRU list. * * We would like to get this info without a page flag, but the state * needs to survive until the page is last deleted from the LRU, which * could be as far down as __page_cache_release. */ static inline int page_is_file_cache(struct page *page) { return !PageSwapBacked(page); } static inline void add_page_to_lru_list(struct zone *zone, struct page *page, enum lru_list l) { list_add(&page->lru, &zone->lru[l].list); __inc_zone_state(zone, NR_LRU_BASE + l); mem_cgroup_add_lru_list(page, l); } static inline void del_page_from_lru_list(struct zone *zone, struct page *page, enum lru_list l) { list_del(&page->lru); __dec_zone_state(zone, NR_LRU_BASE + l); mem_cgroup_del_lru_list(page, l); } /** * page_lru_base_type - which LRU list type should a page be on? * @page: the page to test * * Used for LRU list index arithmetic. * * Returns the base LRU type - file or anon - @page should be on. */ static inline enum lru_list page_lru_base_type(struct page *page) { if (page_is_file_cache(page)) return LRU_INACTIVE_FILE; return LRU_INACTIVE_ANON; } /export/home/linux-2.6.31/mm/swap.c: del_page_from_lru(zone, page); del_page_from_lru_list(zone, page, lru); del_page_from_lru(zone, page); /export/home/linux-2.6.31/mm/vmscan.c: del_page_from_lru_list(zone, page, lru); |
