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52d4b9ac KH |
1 | #ifndef __LINUX_PAGE_CGROUP_H |
2 | #define __LINUX_PAGE_CGROUP_H | |
3 | ||
4 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR | |
5 | #include <linux/bit_spinlock.h> | |
6 | /* | |
7 | * Page Cgroup can be considered as an extended mem_map. | |
8 | * A page_cgroup page is associated with every page descriptor. The | |
9 | * page_cgroup helps us identify information about the cgroup | |
10 | * All page cgroups are allocated at boot or memory hotplug event, | |
11 | * then the page cgroup for pfn always exists. | |
12 | */ | |
13 | struct page_cgroup { | |
14 | unsigned long flags; | |
15 | struct mem_cgroup *mem_cgroup; | |
16 | struct page *page; | |
17 | struct list_head lru; /* per cgroup LRU list */ | |
18 | }; | |
19 | ||
31168481 | 20 | void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat); |
ca371c0d KH |
21 | |
22 | #ifdef CONFIG_SPARSEMEM | |
23 | static inline void __init page_cgroup_init_flatmem(void) | |
24 | { | |
25 | } | |
26 | extern void __init page_cgroup_init(void); | |
27 | #else | |
28 | void __init page_cgroup_init_flatmem(void); | |
29 | static inline void __init page_cgroup_init(void) | |
30 | { | |
31 | } | |
32 | #endif | |
33 | ||
52d4b9ac KH |
34 | struct page_cgroup *lookup_page_cgroup(struct page *page); |
35 | ||
36 | enum { | |
37 | /* flags for mem_cgroup */ | |
38 | PCG_LOCK, /* page cgroup is locked */ | |
39 | PCG_CACHE, /* charged as cache */ | |
40 | PCG_USED, /* this object is in use. */ | |
52d4b9ac KH |
41 | }; |
42 | ||
43 | #define TESTPCGFLAG(uname, lname) \ | |
44 | static inline int PageCgroup##uname(struct page_cgroup *pc) \ | |
45 | { return test_bit(PCG_##lname, &pc->flags); } | |
46 | ||
47 | #define SETPCGFLAG(uname, lname) \ | |
48 | static inline void SetPageCgroup##uname(struct page_cgroup *pc)\ | |
49 | { set_bit(PCG_##lname, &pc->flags); } | |
50 | ||
51 | #define CLEARPCGFLAG(uname, lname) \ | |
52 | static inline void ClearPageCgroup##uname(struct page_cgroup *pc) \ | |
53 | { clear_bit(PCG_##lname, &pc->flags); } | |
54 | ||
55 | /* Cache flag is set only once (at allocation) */ | |
56 | TESTPCGFLAG(Cache, CACHE) | |
57 | ||
58 | TESTPCGFLAG(Used, USED) | |
59 | CLEARPCGFLAG(Used, USED) | |
60 | ||
52d4b9ac KH |
61 | static inline int page_cgroup_nid(struct page_cgroup *pc) |
62 | { | |
63 | return page_to_nid(pc->page); | |
64 | } | |
65 | ||
66 | static inline enum zone_type page_cgroup_zid(struct page_cgroup *pc) | |
67 | { | |
68 | return page_zonenum(pc->page); | |
69 | } | |
70 | ||
71 | static inline void lock_page_cgroup(struct page_cgroup *pc) | |
72 | { | |
73 | bit_spin_lock(PCG_LOCK, &pc->flags); | |
74 | } | |
75 | ||
76 | static inline int trylock_page_cgroup(struct page_cgroup *pc) | |
77 | { | |
78 | return bit_spin_trylock(PCG_LOCK, &pc->flags); | |
79 | } | |
80 | ||
81 | static inline void unlock_page_cgroup(struct page_cgroup *pc) | |
82 | { | |
83 | bit_spin_unlock(PCG_LOCK, &pc->flags); | |
84 | } | |
85 | ||
86 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ | |
87 | struct page_cgroup; | |
88 | ||
31168481 | 89 | static inline void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat) |
52d4b9ac KH |
90 | { |
91 | } | |
92 | ||
93 | static inline struct page_cgroup *lookup_page_cgroup(struct page *page) | |
94 | { | |
95 | return NULL; | |
96 | } | |
94b6da5a KH |
97 | |
98 | static inline void page_cgroup_init(void) | |
99 | { | |
100 | } | |
101 | ||
ca371c0d KH |
102 | static inline void __init page_cgroup_init_flatmem(void) |
103 | { | |
104 | } | |
105 | ||
27a7faa0 KH |
106 | #endif |
107 | ||
108 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP | |
109 | #include <linux/swap.h> | |
a3b2d692 KH |
110 | extern unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id); |
111 | extern unsigned short lookup_swap_cgroup(swp_entry_t ent); | |
27a7faa0 KH |
112 | extern int swap_cgroup_swapon(int type, unsigned long max_pages); |
113 | extern void swap_cgroup_swapoff(int type); | |
114 | #else | |
115 | #include <linux/swap.h> | |
116 | ||
117 | static inline | |
a3b2d692 | 118 | unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id) |
27a7faa0 | 119 | { |
a3b2d692 | 120 | return 0; |
27a7faa0 KH |
121 | } |
122 | ||
123 | static inline | |
a3b2d692 | 124 | unsigned short lookup_swap_cgroup(swp_entry_t ent) |
27a7faa0 | 125 | { |
a3b2d692 | 126 | return 0; |
27a7faa0 KH |
127 | } |
128 | ||
129 | static inline int | |
130 | swap_cgroup_swapon(int type, unsigned long max_pages) | |
131 | { | |
132 | return 0; | |
133 | } | |
134 | ||
135 | static inline void swap_cgroup_swapoff(int type) | |
136 | { | |
137 | return; | |
138 | } | |
139 | ||
52d4b9ac KH |
140 | #endif |
141 | #endif |