projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 52d4b9ac KH |
1 | #ifndef __LINUX_PAGE_CGROUP_H |
| 2 | #define __LINUX_PAGE_CGROUP_H | |
| 3 | ||
| 6b3ae58e JW |
4 | enum { |
| 5 | /* flags for mem_cgroup */ | |
| 0a31bc97 JW |
6 | PCG_USED = 0x01, /* This page is charged to a memcg */ |
| 7 | PCG_MEM = 0x02, /* This page holds a memory charge */ | |
| 8 | PCG_MEMSW = 0x04, /* This page holds a memory+swap charge */ | |
| 6b3ae58e JW |
9 | }; |
| 10 | ||
| 434584fe VD |
11 | struct pglist_data; |
| 12 | ||
| c255a458 | 13 | #ifdef CONFIG_MEMCG |
| 434584fe | 14 | struct mem_cgroup; |
| 6b3ae58e | 15 | |
| 52d4b9ac KH |
16 | /* |
| 17 | * Page Cgroup can be considered as an extended mem_map. | |
| 18 | * A page_cgroup page is associated with every page descriptor. The | |
| 19 | * page_cgroup helps us identify information about the cgroup | |
| 20 | * All page cgroups are allocated at boot or memory hotplug event, | |
| 21 | * then the page cgroup for pfn always exists. | |
| 22 | */ | |
| 23 | struct page_cgroup { | |
| 24 | unsigned long flags; | |
| 25 | struct mem_cgroup *mem_cgroup; | |
| 52d4b9ac KH |
26 | }; |
| 27 | ||
| 434584fe | 28 | extern void pgdat_page_cgroup_init(struct pglist_data *pgdat); |
| ca371c0d KH |
29 | |
| 30 | #ifdef CONFIG_SPARSEMEM | |
| 434584fe | 31 | static inline void page_cgroup_init_flatmem(void) |
| ca371c0d KH |
32 | { |
| 33 | } | |
| 434584fe | 34 | extern void page_cgroup_init(void); |
| ca371c0d | 35 | #else |
| 434584fe VD |
36 | extern void page_cgroup_init_flatmem(void); |
| 37 | static inline void page_cgroup_init(void) | |
| ca371c0d KH |
38 | { |
| 39 | } | |
| 40 | #endif | |
| 41 | ||
| 52d4b9ac | 42 | struct page_cgroup *lookup_page_cgroup(struct page *page); |
| 52d4b9ac | 43 | |
| 0a31bc97 | 44 | static inline int PageCgroupUsed(struct page_cgroup *pc) |
| 52d4b9ac | 45 | { |
| 0a31bc97 | 46 | return !!(pc->flags & PCG_USED); |
| 52d4b9ac | 47 | } |
| 434584fe | 48 | #else /* !CONFIG_MEMCG */ |
| 52d4b9ac KH |
49 | struct page_cgroup; |
| 50 | ||
| 434584fe | 51 | static inline void pgdat_page_cgroup_init(struct pglist_data *pgdat) |
| 52d4b9ac KH |
52 | { |
| 53 | } | |
| 54 | ||
| 55 | static inline struct page_cgroup *lookup_page_cgroup(struct page *page) | |
| 56 | { | |
| 57 | return NULL; | |
| 58 | } | |
| 94b6da5a KH |
59 | |
| 60 | static inline void page_cgroup_init(void) | |
| 61 | { | |
| 62 | } | |
| 63 | ||
| 434584fe | 64 | static inline void page_cgroup_init_flatmem(void) |
| ca371c0d KH |
65 | { |
| 66 | } | |
| c255a458 | 67 | #endif /* CONFIG_MEMCG */ |
| 27a7faa0 | 68 | |
| 27a7faa0 | 69 | #include <linux/swap.h> |
| 97572751 | 70 | |
| c255a458 | 71 | #ifdef CONFIG_MEMCG_SWAP |
| 02491447 DN |
72 | extern unsigned short swap_cgroup_cmpxchg(swp_entry_t ent, |
| 73 | unsigned short old, unsigned short new); | |
| a3b2d692 | 74 | extern unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id); |
| 9fb4b7cc | 75 | extern unsigned short lookup_swap_cgroup_id(swp_entry_t ent); |
| 27a7faa0 KH |
76 | extern int swap_cgroup_swapon(int type, unsigned long max_pages); |
| 77 | extern void swap_cgroup_swapoff(int type); | |
| 78 | #else | |
| 27a7faa0 KH |
79 | |
| 80 | static inline | |
| a3b2d692 | 81 | unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id) |
| 27a7faa0 | 82 | { |
| a3b2d692 | 83 | return 0; |
| 27a7faa0 KH |
84 | } |
| 85 | ||
| 86 | static inline | |
| 9fb4b7cc | 87 | unsigned short lookup_swap_cgroup_id(swp_entry_t ent) |
| 27a7faa0 | 88 | { |
| a3b2d692 | 89 | return 0; |
| 27a7faa0 KH |
90 | } |
| 91 | ||
| 92 | static inline int | |
| 93 | swap_cgroup_swapon(int type, unsigned long max_pages) | |
| 94 | { | |
| 95 | return 0; | |
| 96 | } | |
| 97 | ||
| 98 | static inline void swap_cgroup_swapoff(int type) | |
| 99 | { | |
| 100 | return; | |
| 101 | } | |
| 102 | ||
| c255a458 | 103 | #endif /* CONFIG_MEMCG_SWAP */ |
| 6b3ae58e | 104 | |
| 6b3ae58e | 105 | #endif /* __LINUX_PAGE_CGROUP_H */ |