1 #ifndef LINUX_MM_INLINE_H
2 #define LINUX_MM_INLINE_H
5 * page_is_file_cache - should the page be on a file LRU or anon LRU?
6 * @page: the page to test
8 * Returns 1 if @page is page cache page backed by a regular filesystem,
9 * or 0 if @page is anonymous, tmpfs or otherwise ram or swap backed.
10 * Used by functions that manipulate the LRU lists, to sort a page
11 * onto the right LRU list.
13 * We would like to get this info without a page flag, but the state
14 * needs to survive until the page is last deleted from the LRU, which
15 * could be as far down as __page_cache_release.
17 static inline int page_is_file_cache(struct page *page)
19 return !PageSwapBacked(page);
23 add_page_to_lru_list(struct zone *zone, struct page *page, enum lru_list l)
25 list_add(&page->lru, &zone->lru[l].list);
26 __inc_zone_state(zone, NR_LRU_BASE + l);
27 mem_cgroup_add_lru_list(page, l);
31 del_page_from_lru_list(struct zone *zone, struct page *page, enum lru_list l)
34 __dec_zone_state(zone, NR_LRU_BASE + l);
35 mem_cgroup_del_lru_list(page, l);
39 * page_lru_base_type - which LRU list type should a page be on?
40 * @page: the page to test
42 * Used for LRU list index arithmetic.
44 * Returns the base LRU type - file or anon - @page should be on.
46 static inline enum lru_list page_lru_base_type(struct page *page)
48 if (page_is_file_cache(page))
49 return LRU_INACTIVE_FILE;
50 return LRU_INACTIVE_ANON;
54 del_page_from_lru(struct zone *zone, struct page *page)
59 if (PageUnevictable(page)) {
60 __ClearPageUnevictable(page);
63 l = page_lru_base_type(page);
64 if (PageActive(page)) {
65 __ClearPageActive(page);
69 __dec_zone_state(zone, NR_LRU_BASE + l);
70 mem_cgroup_del_lru_list(page, l);
74 * page_lru - which LRU list should a page be on?
75 * @page: the page to test
77 * Returns the LRU list a page should be on, as an index
78 * into the array of LRU lists.
80 static inline enum lru_list page_lru(struct page *page)
84 if (PageUnevictable(page))
85 lru = LRU_UNEVICTABLE;
87 lru = page_lru_base_type(page);