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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
);
37 mem_cgroup_update_lru_size(lruvec
, lru
, zid
, nr_pages
);
42 * __clear_page_lru_flags - clear page lru flags before releasing a page
43 * @page: the page that was on lru and now has a zero reference
45 static __always_inline
void __clear_page_lru_flags(struct page
*page
)
47 VM_BUG_ON_PAGE(!PageLRU(page
), page
);
51 /* this shouldn't happen, so leave the flags to bad_page() */
52 if (PageActive(page
) && PageUnevictable(page
))
55 __ClearPageActive(page
);
56 __ClearPageUnevictable(page
);
60 * page_lru - which LRU list should a page be on?
61 * @page: the page to test
63 * Returns the LRU list a page should be on, as an index
64 * into the array of LRU lists.
66 static __always_inline
enum lru_list
page_lru(struct page
*page
)
70 VM_BUG_ON_PAGE(PageActive(page
) && PageUnevictable(page
), page
);
72 if (PageUnevictable(page
))
73 return LRU_UNEVICTABLE
;
75 lru
= page_is_file_lru(page
) ? LRU_INACTIVE_FILE
: LRU_INACTIVE_ANON
;
82 static __always_inline
void add_page_to_lru_list(struct page
*page
,
83 struct lruvec
*lruvec
)
85 enum lru_list lru
= page_lru(page
);
87 update_lru_size(lruvec
, lru
, page_zonenum(page
), thp_nr_pages(page
));
88 list_add(&page
->lru
, &lruvec
->lists
[lru
]);
91 static __always_inline
void add_page_to_lru_list_tail(struct page
*page
,
92 struct lruvec
*lruvec
)
94 enum lru_list lru
= page_lru(page
);
96 update_lru_size(lruvec
, lru
, page_zonenum(page
), thp_nr_pages(page
));
97 list_add_tail(&page
->lru
, &lruvec
->lists
[lru
]);
100 static __always_inline
void del_page_from_lru_list(struct page
*page
,
101 struct lruvec
*lruvec
)
103 list_del(&page
->lru
);
104 update_lru_size(lruvec
, page_lru(page
), page_zonenum(page
),
105 -thp_nr_pages(page
));