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git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - include/linux/mm_inline.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef LINUX_MM_INLINE_H
3 #define LINUX_MM_INLINE_H
5 #include <linux/huge_mm.h>
6 #include <linux/swap.h>
9 * page_is_file_lru - should the page be on a file LRU or anon LRU?
10 * @page: the page to test
12 * Returns 1 if @page is a regular filesystem backed page cache page or a lazily
13 * freed anonymous page (e.g. via MADV_FREE). Returns 0 if @page is a normal
14 * anonymous page, a tmpfs page or otherwise ram or swap backed page. Used by
15 * functions that manipulate the LRU lists, to sort a page onto the right LRU
18 * We would like to get this info without a page flag, but the state
19 * needs to survive until the page is last deleted from the LRU, which
20 * could be as far down as __page_cache_release.
22 static inline int page_is_file_lru(struct page
*page
)
24 return !PageSwapBacked(page
);
27 static __always_inline
void __update_lru_size(struct lruvec
*lruvec
,
28 enum lru_list lru
, enum zone_type zid
,
31 struct pglist_data
*pgdat
= lruvec_pgdat(lruvec
);
33 __mod_lruvec_state(lruvec
, NR_LRU_BASE
+ lru
, nr_pages
);
34 __mod_zone_page_state(&pgdat
->node_zones
[zid
],
35 NR_ZONE_LRU_BASE
+ lru
, nr_pages
);
38 static __always_inline
void update_lru_size(struct lruvec
*lruvec
,
39 enum lru_list lru
, enum zone_type zid
,
42 __update_lru_size(lruvec
, lru
, zid
, nr_pages
);
44 mem_cgroup_update_lru_size(lruvec
, lru
, zid
, nr_pages
);
48 static __always_inline
void add_page_to_lru_list(struct page
*page
,
49 struct lruvec
*lruvec
, enum lru_list lru
)
51 update_lru_size(lruvec
, lru
, page_zonenum(page
), hpage_nr_pages(page
));
52 list_add(&page
->lru
, &lruvec
->lists
[lru
]);
55 static __always_inline
void add_page_to_lru_list_tail(struct page
*page
,
56 struct lruvec
*lruvec
, enum lru_list lru
)
58 update_lru_size(lruvec
, lru
, page_zonenum(page
), hpage_nr_pages(page
));
59 list_add_tail(&page
->lru
, &lruvec
->lists
[lru
]);
62 static __always_inline
void del_page_from_lru_list(struct page
*page
,
63 struct lruvec
*lruvec
, enum lru_list lru
)
66 update_lru_size(lruvec
, lru
, page_zonenum(page
), -hpage_nr_pages(page
));
70 * page_lru_base_type - which LRU list type should a page be on?
71 * @page: the page to test
73 * Used for LRU list index arithmetic.
75 * Returns the base LRU type - file or anon - @page should be on.
77 static inline enum lru_list
page_lru_base_type(struct page
*page
)
79 if (page_is_file_lru(page
))
80 return LRU_INACTIVE_FILE
;
81 return LRU_INACTIVE_ANON
;
85 * page_off_lru - which LRU list was page on? clearing its lru flags.
86 * @page: the page to test
88 * Returns the LRU list a page was on, as an index into the array of LRU
89 * lists; and clears its Unevictable or Active flags, ready for freeing.
91 static __always_inline
enum lru_list
page_off_lru(struct page
*page
)
95 if (PageUnevictable(page
)) {
96 __ClearPageUnevictable(page
);
97 lru
= LRU_UNEVICTABLE
;
99 lru
= page_lru_base_type(page
);
100 if (PageActive(page
)) {
101 __ClearPageActive(page
);
109 * page_lru - which LRU list should a page be on?
110 * @page: the page to test
112 * Returns the LRU list a page should be on, as an index
113 * into the array of LRU lists.
115 static __always_inline
enum lru_list
page_lru(struct page
*page
)
119 if (PageUnevictable(page
))
120 lru
= LRU_UNEVICTABLE
;
122 lru
= page_lru_base_type(page
);
123 if (PageActive(page
))