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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
b2e18538 RR |
2 | #ifndef LINUX_MM_INLINE_H |
3 | #define LINUX_MM_INLINE_H | |
4 | ||
2c888cfb | 5 | #include <linux/huge_mm.h> |
6e543d57 | 6 | #include <linux/swap.h> |
2c888cfb | 7 | |
b2e18538 RR |
8 | /** |
9 | * page_is_file_cache - should the page be on a file LRU or anon LRU? | |
10 | * @page: the page to test | |
11 | * | |
6c0b1351 | 12 | * Returns 1 if @page is page cache page backed by a regular filesystem, |
b2e18538 RR |
13 | * or 0 if @page is anonymous, tmpfs or otherwise ram or swap backed. |
14 | * Used by functions that manipulate the LRU lists, to sort a page | |
15 | * onto the right LRU list. | |
16 | * | |
17 | * We would like to get this info without a page flag, but the state | |
18 | * needs to survive until the page is last deleted from the LRU, which | |
19 | * could be as far down as __page_cache_release. | |
20 | */ | |
21 | static inline int page_is_file_cache(struct page *page) | |
22 | { | |
6c0b1351 | 23 | return !PageSwapBacked(page); |
b2e18538 RR |
24 | } |
25 | ||
9d5e6a9f | 26 | static __always_inline void __update_lru_size(struct lruvec *lruvec, |
599d0c95 MG |
27 | enum lru_list lru, enum zone_type zid, |
28 | int nr_pages) | |
9d5e6a9f | 29 | { |
599d0c95 MG |
30 | struct pglist_data *pgdat = lruvec_pgdat(lruvec); |
31 | ||
32 | __mod_node_page_state(pgdat, NR_LRU_BASE + lru, nr_pages); | |
71c799f4 MK |
33 | __mod_zone_page_state(&pgdat->node_zones[zid], |
34 | NR_ZONE_LRU_BASE + lru, nr_pages); | |
9d5e6a9f HD |
35 | } |
36 | ||
37 | static __always_inline void update_lru_size(struct lruvec *lruvec, | |
599d0c95 MG |
38 | enum lru_list lru, enum zone_type zid, |
39 | int nr_pages) | |
9d5e6a9f | 40 | { |
599d0c95 | 41 | __update_lru_size(lruvec, lru, zid, nr_pages); |
7ee36a14 | 42 | #ifdef CONFIG_MEMCG |
b4536f0c | 43 | mem_cgroup_update_lru_size(lruvec, lru, zid, nr_pages); |
9d5e6a9f HD |
44 | #endif |
45 | } | |
46 | ||
fa9add64 HD |
47 | static __always_inline void add_page_to_lru_list(struct page *page, |
48 | struct lruvec *lruvec, enum lru_list lru) | |
71e3aac0 | 49 | { |
599d0c95 | 50 | update_lru_size(lruvec, lru, page_zonenum(page), hpage_nr_pages(page)); |
4111304d | 51 | list_add(&page->lru, &lruvec->lists[lru]); |
71e3aac0 AA |
52 | } |
53 | ||
c55e8d03 JW |
54 | static __always_inline void add_page_to_lru_list_tail(struct page *page, |
55 | struct lruvec *lruvec, enum lru_list lru) | |
56 | { | |
57 | update_lru_size(lruvec, lru, page_zonenum(page), hpage_nr_pages(page)); | |
58 | list_add_tail(&page->lru, &lruvec->lists[lru]); | |
59 | } | |
60 | ||
fa9add64 HD |
61 | static __always_inline void del_page_from_lru_list(struct page *page, |
62 | struct lruvec *lruvec, enum lru_list lru) | |
b69408e8 CL |
63 | { |
64 | list_del(&page->lru); | |
599d0c95 | 65 | update_lru_size(lruvec, lru, page_zonenum(page), -hpage_nr_pages(page)); |
b69408e8 CL |
66 | } |
67 | ||
401a8e1c JW |
68 | /** |
69 | * page_lru_base_type - which LRU list type should a page be on? | |
70 | * @page: the page to test | |
71 | * | |
72 | * Used for LRU list index arithmetic. | |
73 | * | |
74 | * Returns the base LRU type - file or anon - @page should be on. | |
75 | */ | |
76 | static inline enum lru_list page_lru_base_type(struct page *page) | |
77 | { | |
78 | if (page_is_file_cache(page)) | |
79 | return LRU_INACTIVE_FILE; | |
80 | return LRU_INACTIVE_ANON; | |
81 | } | |
82 | ||
1c1c53d4 HD |
83 | /** |
84 | * page_off_lru - which LRU list was page on? clearing its lru flags. | |
85 | * @page: the page to test | |
86 | * | |
87 | * Returns the LRU list a page was on, as an index into the array of LRU | |
88 | * lists; and clears its Unevictable or Active flags, ready for freeing. | |
89 | */ | |
014483bc | 90 | static __always_inline enum lru_list page_off_lru(struct page *page) |
1da177e4 | 91 | { |
4111304d | 92 | enum lru_list lru; |
b69408e8 | 93 | |
894bc310 LS |
94 | if (PageUnevictable(page)) { |
95 | __ClearPageUnevictable(page); | |
4111304d | 96 | lru = LRU_UNEVICTABLE; |
894bc310 | 97 | } else { |
4111304d | 98 | lru = page_lru_base_type(page); |
894bc310 LS |
99 | if (PageActive(page)) { |
100 | __ClearPageActive(page); | |
4111304d | 101 | lru += LRU_ACTIVE; |
894bc310 | 102 | } |
1da177e4 | 103 | } |
1c1c53d4 | 104 | return lru; |
1da177e4 | 105 | } |
21eac81f | 106 | |
b69408e8 CL |
107 | /** |
108 | * page_lru - which LRU list should a page be on? | |
109 | * @page: the page to test | |
110 | * | |
111 | * Returns the LRU list a page should be on, as an index | |
112 | * into the array of LRU lists. | |
113 | */ | |
014483bc | 114 | static __always_inline enum lru_list page_lru(struct page *page) |
b69408e8 | 115 | { |
401a8e1c | 116 | enum lru_list lru; |
b69408e8 | 117 | |
894bc310 LS |
118 | if (PageUnevictable(page)) |
119 | lru = LRU_UNEVICTABLE; | |
120 | else { | |
401a8e1c | 121 | lru = page_lru_base_type(page); |
894bc310 LS |
122 | if (PageActive(page)) |
123 | lru += LRU_ACTIVE; | |
894bc310 | 124 | } |
b69408e8 CL |
125 | return lru; |
126 | } | |
b2e18538 | 127 | |
d72ee911 GT |
128 | #define lru_to_page(head) (list_entry((head)->prev, struct page, lru)) |
129 | ||
ce0fa3e5 TL |
130 | #ifdef arch_unmap_kpfn |
131 | extern void arch_unmap_kpfn(unsigned long pfn); | |
132 | #else | |
133 | static __always_inline void arch_unmap_kpfn(unsigned long pfn) { } | |
134 | #endif | |
135 | ||
b2e18538 | 136 | #endif |