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b2e18538 RR |
1 | #ifndef LINUX_MM_INLINE_H |
2 | #define LINUX_MM_INLINE_H | |
3 | ||
2c888cfb | 4 | #include <linux/huge_mm.h> |
6e543d57 | 5 | #include <linux/swap.h> |
2c888cfb | 6 | |
b2e18538 RR |
7 | /** |
8 | * page_is_file_cache - should the page be on a file LRU or anon LRU? | |
9 | * @page: the page to test | |
10 | * | |
6c0b1351 | 11 | * Returns 1 if @page is page cache page backed by a regular filesystem, |
b2e18538 RR |
12 | * or 0 if @page is anonymous, tmpfs or otherwise ram or swap backed. |
13 | * Used by functions that manipulate the LRU lists, to sort a page | |
14 | * onto the right LRU list. | |
15 | * | |
16 | * We would like to get this info without a page flag, but the state | |
17 | * needs to survive until the page is last deleted from the LRU, which | |
18 | * could be as far down as __page_cache_release. | |
19 | */ | |
20 | static inline int page_is_file_cache(struct page *page) | |
21 | { | |
6c0b1351 | 22 | return !PageSwapBacked(page); |
b2e18538 RR |
23 | } |
24 | ||
9d5e6a9f | 25 | static __always_inline void __update_lru_size(struct lruvec *lruvec, |
599d0c95 MG |
26 | enum lru_list lru, enum zone_type zid, |
27 | int nr_pages) | |
9d5e6a9f | 28 | { |
599d0c95 MG |
29 | struct pglist_data *pgdat = lruvec_pgdat(lruvec); |
30 | ||
31 | __mod_node_page_state(pgdat, NR_LRU_BASE + lru, nr_pages); | |
71c799f4 MK |
32 | __mod_zone_page_state(&pgdat->node_zones[zid], |
33 | NR_ZONE_LRU_BASE + lru, nr_pages); | |
9d5e6a9f HD |
34 | } |
35 | ||
36 | static __always_inline void update_lru_size(struct lruvec *lruvec, | |
599d0c95 MG |
37 | enum lru_list lru, enum zone_type zid, |
38 | int nr_pages) | |
9d5e6a9f | 39 | { |
599d0c95 | 40 | __update_lru_size(lruvec, lru, zid, nr_pages); |
7ee36a14 | 41 | #ifdef CONFIG_MEMCG |
b4536f0c | 42 | mem_cgroup_update_lru_size(lruvec, lru, zid, nr_pages); |
9d5e6a9f HD |
43 | #endif |
44 | } | |
45 | ||
fa9add64 HD |
46 | static __always_inline void add_page_to_lru_list(struct page *page, |
47 | struct lruvec *lruvec, enum lru_list lru) | |
71e3aac0 | 48 | { |
599d0c95 | 49 | update_lru_size(lruvec, lru, page_zonenum(page), hpage_nr_pages(page)); |
4111304d | 50 | list_add(&page->lru, &lruvec->lists[lru]); |
71e3aac0 AA |
51 | } |
52 | ||
c55e8d03 JW |
53 | static __always_inline void add_page_to_lru_list_tail(struct page *page, |
54 | struct lruvec *lruvec, enum lru_list lru) | |
55 | { | |
56 | update_lru_size(lruvec, lru, page_zonenum(page), hpage_nr_pages(page)); | |
57 | list_add_tail(&page->lru, &lruvec->lists[lru]); | |
58 | } | |
59 | ||
fa9add64 HD |
60 | static __always_inline void del_page_from_lru_list(struct page *page, |
61 | struct lruvec *lruvec, enum lru_list lru) | |
b69408e8 CL |
62 | { |
63 | list_del(&page->lru); | |
599d0c95 | 64 | update_lru_size(lruvec, lru, page_zonenum(page), -hpage_nr_pages(page)); |
b69408e8 CL |
65 | } |
66 | ||
401a8e1c JW |
67 | /** |
68 | * page_lru_base_type - which LRU list type should a page be on? | |
69 | * @page: the page to test | |
70 | * | |
71 | * Used for LRU list index arithmetic. | |
72 | * | |
73 | * Returns the base LRU type - file or anon - @page should be on. | |
74 | */ | |
75 | static inline enum lru_list page_lru_base_type(struct page *page) | |
76 | { | |
77 | if (page_is_file_cache(page)) | |
78 | return LRU_INACTIVE_FILE; | |
79 | return LRU_INACTIVE_ANON; | |
80 | } | |
81 | ||
1c1c53d4 HD |
82 | /** |
83 | * page_off_lru - which LRU list was page on? clearing its lru flags. | |
84 | * @page: the page to test | |
85 | * | |
86 | * Returns the LRU list a page was on, as an index into the array of LRU | |
87 | * lists; and clears its Unevictable or Active flags, ready for freeing. | |
88 | */ | |
014483bc | 89 | static __always_inline enum lru_list page_off_lru(struct page *page) |
1da177e4 | 90 | { |
4111304d | 91 | enum lru_list lru; |
b69408e8 | 92 | |
894bc310 LS |
93 | if (PageUnevictable(page)) { |
94 | __ClearPageUnevictable(page); | |
4111304d | 95 | lru = LRU_UNEVICTABLE; |
894bc310 | 96 | } else { |
4111304d | 97 | lru = page_lru_base_type(page); |
894bc310 LS |
98 | if (PageActive(page)) { |
99 | __ClearPageActive(page); | |
4111304d | 100 | lru += LRU_ACTIVE; |
894bc310 | 101 | } |
1da177e4 | 102 | } |
1c1c53d4 | 103 | return lru; |
1da177e4 | 104 | } |
21eac81f | 105 | |
b69408e8 CL |
106 | /** |
107 | * page_lru - which LRU list should a page be on? | |
108 | * @page: the page to test | |
109 | * | |
110 | * Returns the LRU list a page should be on, as an index | |
111 | * into the array of LRU lists. | |
112 | */ | |
014483bc | 113 | static __always_inline enum lru_list page_lru(struct page *page) |
b69408e8 | 114 | { |
401a8e1c | 115 | enum lru_list lru; |
b69408e8 | 116 | |
894bc310 LS |
117 | if (PageUnevictable(page)) |
118 | lru = LRU_UNEVICTABLE; | |
119 | else { | |
401a8e1c | 120 | lru = page_lru_base_type(page); |
894bc310 LS |
121 | if (PageActive(page)) |
122 | lru += LRU_ACTIVE; | |
894bc310 | 123 | } |
b69408e8 CL |
124 | return lru; |
125 | } | |
b2e18538 | 126 | |
d72ee911 GT |
127 | #define lru_to_page(head) (list_entry((head)->prev, struct page, lru)) |
128 | ||
a6456406 TL |
129 | #ifdef arch_unmap_kpfn |
130 | extern void arch_unmap_kpfn(unsigned long pfn); | |
131 | #else | |
132 | static __always_inline void arch_unmap_kpfn(unsigned long pfn) { } | |
133 | #endif | |
134 | ||
b2e18538 | 135 | #endif |