]>
git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - include/linux/mm_inline.h
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
);