1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef LINUX_MM_INLINE_H
3 #define LINUX_MM_INLINE_H
4
5 #include <linux/huge_mm.h>
6 #include <linux/swap.h>
7 #ifndef __GENKSYMS__
8 #define PROTECT_TRACE_INCLUDE_PATH
9 #include <trace/hooks/mm.h>
10 #endif
11
12 /**
13 * page_is_file_lru - should the page be on a file LRU or anon LRU?
14 * @page: the page to test
15 *
16 * Returns 1 if @page is a regular filesystem backed page cache page or a lazily
17 * freed anonymous page (e.g. via MADV_FREE). Returns 0 if @page is a normal
18 * anonymous page, a tmpfs page or otherwise ram or swap backed page. Used by
19 * functions that manipulate the LRU lists, to sort a page onto the right LRU
20 * list.
21 *
22 * We would like to get this info without a page flag, but the state
23 * needs to survive until the page is last deleted from the LRU, which
24 * could be as far down as __page_cache_release.
25 */
page_is_file_lru(struct page * page)26 static inline int page_is_file_lru(struct page *page)
27 {
28 return !PageSwapBacked(page);
29 }
30
__update_lru_size(struct lruvec * lruvec,enum lru_list lru,enum zone_type zid,int nr_pages)31 static __always_inline void __update_lru_size(struct lruvec *lruvec,
32 enum lru_list lru, enum zone_type zid,
33 int nr_pages)
34 {
35 struct pglist_data *pgdat = lruvec_pgdat(lruvec);
36
37 __mod_lruvec_state(lruvec, NR_LRU_BASE + lru, nr_pages);
38 __mod_zone_page_state(&pgdat->node_zones[zid],
39 NR_ZONE_LRU_BASE + lru, nr_pages);
40 }
41
update_lru_size(struct lruvec * lruvec,enum lru_list lru,enum zone_type zid,int nr_pages)42 static __always_inline void update_lru_size(struct lruvec *lruvec,
43 enum lru_list lru, enum zone_type zid,
44 int nr_pages)
45 {
46 __update_lru_size(lruvec, lru, zid, nr_pages);
47 #ifdef CONFIG_MEMCG
48 mem_cgroup_update_lru_size(lruvec, lru, zid, nr_pages);
49 #endif
50 }
51
add_page_to_lru_list(struct page * page,struct lruvec * lruvec,enum lru_list lru)52 static __always_inline void add_page_to_lru_list(struct page *page,
53 struct lruvec *lruvec, enum lru_list lru)
54 {
55 trace_android_vh_add_page_to_lrulist(page, false, lru);
56 update_lru_size(lruvec, lru, page_zonenum(page), thp_nr_pages(page));
57 list_add(&page->lru, &lruvec->lists[lru]);
58 }
59
add_page_to_lru_list_tail(struct page * page,struct lruvec * lruvec,enum lru_list lru)60 static __always_inline void add_page_to_lru_list_tail(struct page *page,
61 struct lruvec *lruvec, enum lru_list lru)
62 {
63 trace_android_vh_add_page_to_lrulist(page, false, lru);
64 update_lru_size(lruvec, lru, page_zonenum(page), thp_nr_pages(page));
65 list_add_tail(&page->lru, &lruvec->lists[lru]);
66 }
67
del_page_from_lru_list(struct page * page,struct lruvec * lruvec,enum lru_list lru)68 static __always_inline void del_page_from_lru_list(struct page *page,
69 struct lruvec *lruvec, enum lru_list lru)
70 {
71 trace_android_vh_del_page_from_lrulist(page, false, lru);
72 list_del(&page->lru);
73 update_lru_size(lruvec, lru, page_zonenum(page), -thp_nr_pages(page));
74 }
75
76 /**
77 * page_lru_base_type - which LRU list type should a page be on?
78 * @page: the page to test
79 *
80 * Used for LRU list index arithmetic.
81 *
82 * Returns the base LRU type - file or anon - @page should be on.
83 */
page_lru_base_type(struct page * page)84 static inline enum lru_list page_lru_base_type(struct page *page)
85 {
86 if (page_is_file_lru(page))
87 return LRU_INACTIVE_FILE;
88 return LRU_INACTIVE_ANON;
89 }
90
91 /**
92 * page_off_lru - which LRU list was page on? clearing its lru flags.
93 * @page: the page to test
94 *
95 * Returns the LRU list a page was on, as an index into the array of LRU
96 * lists; and clears its Unevictable or Active flags, ready for freeing.
97 */
page_off_lru(struct page * page)98 static __always_inline enum lru_list page_off_lru(struct page *page)
99 {
100 enum lru_list lru;
101
102 if (PageUnevictable(page)) {
103 __ClearPageUnevictable(page);
104 lru = LRU_UNEVICTABLE;
105 } else {
106 lru = page_lru_base_type(page);
107 if (PageActive(page)) {
108 __ClearPageActive(page);
109 lru += LRU_ACTIVE;
110 }
111 }
112 return lru;
113 }
114
115 /**
116 * page_lru - which LRU list should a page be on?
117 * @page: the page to test
118 *
119 * Returns the LRU list a page should be on, as an index
120 * into the array of LRU lists.
121 */
page_lru(struct page * page)122 static __always_inline enum lru_list page_lru(struct page *page)
123 {
124 enum lru_list lru;
125
126 if (PageUnevictable(page))
127 lru = LRU_UNEVICTABLE;
128 else {
129 lru = page_lru_base_type(page);
130 if (PageActive(page))
131 lru += LRU_ACTIVE;
132 }
133 return lru;
134 }
135 #endif
136