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52d4b9ac KH |
1 | #ifndef __LINUX_PAGE_CGROUP_H |
2 | #define __LINUX_PAGE_CGROUP_H | |
3 | ||
6b3ae58e JW |
4 | enum { |
5 | /* flags for mem_cgroup */ | |
6 | PCG_LOCK, /* Lock for pc->mem_cgroup and following bits. */ | |
7 | PCG_CACHE, /* charged as cache */ | |
8 | PCG_USED, /* this object is in use. */ | |
9 | PCG_MIGRATION, /* under page migration */ | |
10 | /* flags for mem_cgroup and file and I/O status */ | |
11 | PCG_MOVE_LOCK, /* For race between move_account v.s. following bits */ | |
12 | PCG_FILE_MAPPED, /* page is accounted as "mapped" */ | |
6b3ae58e JW |
13 | __NR_PCG_FLAGS, |
14 | }; | |
15 | ||
16 | #ifndef __GENERATING_BOUNDS_H | |
17 | #include <generated/bounds.h> | |
18 | ||
52d4b9ac KH |
19 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR |
20 | #include <linux/bit_spinlock.h> | |
6b3ae58e | 21 | |
52d4b9ac KH |
22 | /* |
23 | * Page Cgroup can be considered as an extended mem_map. | |
24 | * A page_cgroup page is associated with every page descriptor. The | |
25 | * page_cgroup helps us identify information about the cgroup | |
26 | * All page cgroups are allocated at boot or memory hotplug event, | |
27 | * then the page cgroup for pfn always exists. | |
28 | */ | |
29 | struct page_cgroup { | |
30 | unsigned long flags; | |
31 | struct mem_cgroup *mem_cgroup; | |
52d4b9ac KH |
32 | }; |
33 | ||
31168481 | 34 | void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat); |
ca371c0d KH |
35 | |
36 | #ifdef CONFIG_SPARSEMEM | |
37 | static inline void __init page_cgroup_init_flatmem(void) | |
38 | { | |
39 | } | |
40 | extern void __init page_cgroup_init(void); | |
41 | #else | |
42 | void __init page_cgroup_init_flatmem(void); | |
43 | static inline void __init page_cgroup_init(void) | |
44 | { | |
45 | } | |
46 | #endif | |
47 | ||
52d4b9ac | 48 | struct page_cgroup *lookup_page_cgroup(struct page *page); |
6b3ae58e | 49 | struct page *lookup_cgroup_page(struct page_cgroup *pc); |
52d4b9ac KH |
50 | |
51 | #define TESTPCGFLAG(uname, lname) \ | |
52 | static inline int PageCgroup##uname(struct page_cgroup *pc) \ | |
53 | { return test_bit(PCG_##lname, &pc->flags); } | |
54 | ||
55 | #define SETPCGFLAG(uname, lname) \ | |
56 | static inline void SetPageCgroup##uname(struct page_cgroup *pc)\ | |
57 | { set_bit(PCG_##lname, &pc->flags); } | |
58 | ||
59 | #define CLEARPCGFLAG(uname, lname) \ | |
60 | static inline void ClearPageCgroup##uname(struct page_cgroup *pc) \ | |
61 | { clear_bit(PCG_##lname, &pc->flags); } | |
62 | ||
4b3bde4c BS |
63 | #define TESTCLEARPCGFLAG(uname, lname) \ |
64 | static inline int TestClearPageCgroup##uname(struct page_cgroup *pc) \ | |
65 | { return test_and_clear_bit(PCG_##lname, &pc->flags); } | |
66 | ||
52d4b9ac KH |
67 | /* Cache flag is set only once (at allocation) */ |
68 | TESTPCGFLAG(Cache, CACHE) | |
4b3bde4c BS |
69 | CLEARPCGFLAG(Cache, CACHE) |
70 | SETPCGFLAG(Cache, CACHE) | |
52d4b9ac KH |
71 | |
72 | TESTPCGFLAG(Used, USED) | |
73 | CLEARPCGFLAG(Used, USED) | |
4b3bde4c BS |
74 | SETPCGFLAG(Used, USED) |
75 | ||
8725d541 KH |
76 | SETPCGFLAG(FileMapped, FILE_MAPPED) |
77 | CLEARPCGFLAG(FileMapped, FILE_MAPPED) | |
78 | TESTPCGFLAG(FileMapped, FILE_MAPPED) | |
79 | ||
ac39cf8c AM |
80 | SETPCGFLAG(Migration, MIGRATION) |
81 | CLEARPCGFLAG(Migration, MIGRATION) | |
82 | TESTPCGFLAG(Migration, MIGRATION) | |
83 | ||
52d4b9ac KH |
84 | static inline void lock_page_cgroup(struct page_cgroup *pc) |
85 | { | |
dbd4ea78 KH |
86 | /* |
87 | * Don't take this lock in IRQ context. | |
88 | * This lock is for pc->mem_cgroup, USED, CACHE, MIGRATION | |
89 | */ | |
52d4b9ac KH |
90 | bit_spin_lock(PCG_LOCK, &pc->flags); |
91 | } | |
92 | ||
52d4b9ac KH |
93 | static inline void unlock_page_cgroup(struct page_cgroup *pc) |
94 | { | |
95 | bit_spin_unlock(PCG_LOCK, &pc->flags); | |
96 | } | |
97 | ||
dbd4ea78 KH |
98 | static inline void move_lock_page_cgroup(struct page_cgroup *pc, |
99 | unsigned long *flags) | |
100 | { | |
101 | /* | |
102 | * We know updates to pc->flags of page cache's stats are from both of | |
103 | * usual context or IRQ context. Disable IRQ to avoid deadlock. | |
104 | */ | |
105 | local_irq_save(*flags); | |
106 | bit_spin_lock(PCG_MOVE_LOCK, &pc->flags); | |
107 | } | |
108 | ||
109 | static inline void move_unlock_page_cgroup(struct page_cgroup *pc, | |
110 | unsigned long *flags) | |
111 | { | |
112 | bit_spin_unlock(PCG_MOVE_LOCK, &pc->flags); | |
113 | local_irq_restore(*flags); | |
114 | } | |
115 | ||
52d4b9ac KH |
116 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
117 | struct page_cgroup; | |
118 | ||
31168481 | 119 | static inline void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat) |
52d4b9ac KH |
120 | { |
121 | } | |
122 | ||
123 | static inline struct page_cgroup *lookup_page_cgroup(struct page *page) | |
124 | { | |
125 | return NULL; | |
126 | } | |
94b6da5a KH |
127 | |
128 | static inline void page_cgroup_init(void) | |
129 | { | |
130 | } | |
131 | ||
ca371c0d KH |
132 | static inline void __init page_cgroup_init_flatmem(void) |
133 | { | |
134 | } | |
135 | ||
6b3ae58e | 136 | #endif /* CONFIG_CGROUP_MEM_RES_CTLR */ |
27a7faa0 | 137 | |
27a7faa0 | 138 | #include <linux/swap.h> |
97572751 JSR |
139 | |
140 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP | |
02491447 DN |
141 | extern unsigned short swap_cgroup_cmpxchg(swp_entry_t ent, |
142 | unsigned short old, unsigned short new); | |
a3b2d692 | 143 | extern unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id); |
9fb4b7cc | 144 | extern unsigned short lookup_swap_cgroup_id(swp_entry_t ent); |
27a7faa0 KH |
145 | extern int swap_cgroup_swapon(int type, unsigned long max_pages); |
146 | extern void swap_cgroup_swapoff(int type); | |
147 | #else | |
27a7faa0 KH |
148 | |
149 | static inline | |
a3b2d692 | 150 | unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id) |
27a7faa0 | 151 | { |
a3b2d692 | 152 | return 0; |
27a7faa0 KH |
153 | } |
154 | ||
155 | static inline | |
9fb4b7cc | 156 | unsigned short lookup_swap_cgroup_id(swp_entry_t ent) |
27a7faa0 | 157 | { |
a3b2d692 | 158 | return 0; |
27a7faa0 KH |
159 | } |
160 | ||
161 | static inline int | |
162 | swap_cgroup_swapon(int type, unsigned long max_pages) | |
163 | { | |
164 | return 0; | |
165 | } | |
166 | ||
167 | static inline void swap_cgroup_swapoff(int type) | |
168 | { | |
169 | return; | |
170 | } | |
171 | ||
6b3ae58e JW |
172 | #endif /* CONFIG_CGROUP_MEM_RES_CTLR_SWAP */ |
173 | ||
174 | #endif /* !__GENERATING_BOUNDS_H */ | |
175 | ||
176 | #endif /* __LINUX_PAGE_CGROUP_H */ |