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);
49 * page_lru_base_type - which LRU list type should a page be on?
50 * @page: the page to test
52 * Used for LRU list index arithmetic.
54 * Returns the base LRU type - file or anon - @page should be on.
56 static inline enum lru_list page_lru_base_type(struct page *page)
58 if (page_is_file_lru(page))
59 return LRU_INACTIVE_FILE;
60 return LRU_INACTIVE_ANON;
64 * __clear_page_lru_flags - clear page lru flags before releasing a page
65 * @page: the page that was on lru and now has a zero reference
67 static __always_inline void __clear_page_lru_flags(struct page *page)
71 /* this shouldn't happen, so leave the flags to bad_page() */
72 if (PageActive(page) && PageUnevictable(page))
75 __ClearPageActive(page);
76 __ClearPageUnevictable(page);
80 * page_lru - which LRU list should a page be on?
81 * @page: the page to test
83 * Returns the LRU list a page should be on, as an index
84 * into the array of LRU lists.
86 static __always_inline enum lru_list page_lru(struct page *page)
90 if (PageUnevictable(page))
91 lru = LRU_UNEVICTABLE;
93 lru = page_lru_base_type(page);
100 static __always_inline void add_page_to_lru_list(struct page *page,
101 struct lruvec *lruvec)
103 enum lru_list lru = page_lru(page);
105 update_lru_size(lruvec, lru, page_zonenum(page), thp_nr_pages(page));
106 list_add(&page->lru, &lruvec->lists[lru]);
109 static __always_inline void add_page_to_lru_list_tail(struct page *page,
110 struct lruvec *lruvec)
112 enum lru_list lru = page_lru(page);
114 update_lru_size(lruvec, lru, page_zonenum(page), thp_nr_pages(page));
115 list_add_tail(&page->lru, &lruvec->lists[lru]);
118 static __always_inline void del_page_from_lru_list(struct page *page,
119 struct lruvec *lruvec)
121 list_del(&page->lru);
122 update_lru_size(lruvec, page_lru(page), page_zonenum(page),
123 -thp_nr_pages(page));