KAMEZAWA Hiroyuki | 52d4b9a | 2008-10-18 20:28:16 -0700 | [diff] [blame] | 1 | #ifndef __LINUX_PAGE_CGROUP_H |
| 2 | #define __LINUX_PAGE_CGROUP_H |
| 3 | |
Johannes Weiner | 6b3ae58 | 2011-03-23 16:42:30 -0700 | [diff] [blame] | 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" */ |
| 13 | /* No lock in page_cgroup */ |
| 14 | PCG_ACCT_LRU, /* page has been accounted for (under lru_lock) */ |
| 15 | __NR_PCG_FLAGS, |
| 16 | }; |
| 17 | |
| 18 | #ifndef __GENERATING_BOUNDS_H |
| 19 | #include <generated/bounds.h> |
| 20 | |
KAMEZAWA Hiroyuki | 52d4b9a | 2008-10-18 20:28:16 -0700 | [diff] [blame] | 21 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR |
| 22 | #include <linux/bit_spinlock.h> |
Johannes Weiner | 6b3ae58 | 2011-03-23 16:42:30 -0700 | [diff] [blame] | 23 | |
KAMEZAWA Hiroyuki | 52d4b9a | 2008-10-18 20:28:16 -0700 | [diff] [blame] | 24 | /* |
| 25 | * Page Cgroup can be considered as an extended mem_map. |
| 26 | * A page_cgroup page is associated with every page descriptor. The |
| 27 | * page_cgroup helps us identify information about the cgroup |
| 28 | * All page cgroups are allocated at boot or memory hotplug event, |
| 29 | * then the page cgroup for pfn always exists. |
| 30 | */ |
| 31 | struct page_cgroup { |
| 32 | unsigned long flags; |
| 33 | struct mem_cgroup *mem_cgroup; |
KAMEZAWA Hiroyuki | 52d4b9a | 2008-10-18 20:28:16 -0700 | [diff] [blame] | 34 | }; |
| 35 | |
Al Viro | 3116848 | 2008-11-22 17:33:24 +0000 | [diff] [blame] | 36 | void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat); |
KAMEZAWA Hiroyuki | ca371c0 | 2009-06-12 10:33:53 +0300 | [diff] [blame] | 37 | |
| 38 | #ifdef CONFIG_SPARSEMEM |
| 39 | static inline void __init page_cgroup_init_flatmem(void) |
| 40 | { |
| 41 | } |
| 42 | extern void __init page_cgroup_init(void); |
| 43 | #else |
| 44 | void __init page_cgroup_init_flatmem(void); |
| 45 | static inline void __init page_cgroup_init(void) |
| 46 | { |
| 47 | } |
| 48 | #endif |
| 49 | |
KAMEZAWA Hiroyuki | 52d4b9a | 2008-10-18 20:28:16 -0700 | [diff] [blame] | 50 | struct page_cgroup *lookup_page_cgroup(struct page *page); |
Johannes Weiner | 6b3ae58 | 2011-03-23 16:42:30 -0700 | [diff] [blame] | 51 | struct page *lookup_cgroup_page(struct page_cgroup *pc); |
KAMEZAWA Hiroyuki | 52d4b9a | 2008-10-18 20:28:16 -0700 | [diff] [blame] | 52 | |
| 53 | #define TESTPCGFLAG(uname, lname) \ |
| 54 | static inline int PageCgroup##uname(struct page_cgroup *pc) \ |
| 55 | { return test_bit(PCG_##lname, &pc->flags); } |
| 56 | |
| 57 | #define SETPCGFLAG(uname, lname) \ |
| 58 | static inline void SetPageCgroup##uname(struct page_cgroup *pc)\ |
| 59 | { set_bit(PCG_##lname, &pc->flags); } |
| 60 | |
| 61 | #define CLEARPCGFLAG(uname, lname) \ |
| 62 | static inline void ClearPageCgroup##uname(struct page_cgroup *pc) \ |
| 63 | { clear_bit(PCG_##lname, &pc->flags); } |
| 64 | |
Balbir Singh | 4b3bde4 | 2009-09-23 15:56:32 -0700 | [diff] [blame] | 65 | #define TESTCLEARPCGFLAG(uname, lname) \ |
| 66 | static inline int TestClearPageCgroup##uname(struct page_cgroup *pc) \ |
| 67 | { return test_and_clear_bit(PCG_##lname, &pc->flags); } |
| 68 | |
KAMEZAWA Hiroyuki | 52d4b9a | 2008-10-18 20:28:16 -0700 | [diff] [blame] | 69 | /* Cache flag is set only once (at allocation) */ |
| 70 | TESTPCGFLAG(Cache, CACHE) |
Balbir Singh | 4b3bde4 | 2009-09-23 15:56:32 -0700 | [diff] [blame] | 71 | CLEARPCGFLAG(Cache, CACHE) |
| 72 | SETPCGFLAG(Cache, CACHE) |
KAMEZAWA Hiroyuki | 52d4b9a | 2008-10-18 20:28:16 -0700 | [diff] [blame] | 73 | |
| 74 | TESTPCGFLAG(Used, USED) |
| 75 | CLEARPCGFLAG(Used, USED) |
Balbir Singh | 4b3bde4 | 2009-09-23 15:56:32 -0700 | [diff] [blame] | 76 | SETPCGFLAG(Used, USED) |
| 77 | |
| 78 | SETPCGFLAG(AcctLRU, ACCT_LRU) |
| 79 | CLEARPCGFLAG(AcctLRU, ACCT_LRU) |
| 80 | TESTPCGFLAG(AcctLRU, ACCT_LRU) |
| 81 | TESTCLEARPCGFLAG(AcctLRU, ACCT_LRU) |
KAMEZAWA Hiroyuki | 52d4b9a | 2008-10-18 20:28:16 -0700 | [diff] [blame] | 82 | |
KAMEZAWA Hiroyuki | 8725d54 | 2010-04-06 14:35:05 -0700 | [diff] [blame] | 83 | |
| 84 | SETPCGFLAG(FileMapped, FILE_MAPPED) |
| 85 | CLEARPCGFLAG(FileMapped, FILE_MAPPED) |
| 86 | TESTPCGFLAG(FileMapped, FILE_MAPPED) |
| 87 | |
akpm@linux-foundation.org | ac39cf8 | 2010-05-26 14:42:46 -0700 | [diff] [blame] | 88 | SETPCGFLAG(Migration, MIGRATION) |
| 89 | CLEARPCGFLAG(Migration, MIGRATION) |
| 90 | TESTPCGFLAG(Migration, MIGRATION) |
| 91 | |
KAMEZAWA Hiroyuki | 52d4b9a | 2008-10-18 20:28:16 -0700 | [diff] [blame] | 92 | static inline void lock_page_cgroup(struct page_cgroup *pc) |
| 93 | { |
KAMEZAWA Hiroyuki | dbd4ea7 | 2011-01-13 15:47:38 -0800 | [diff] [blame] | 94 | /* |
| 95 | * Don't take this lock in IRQ context. |
| 96 | * This lock is for pc->mem_cgroup, USED, CACHE, MIGRATION |
| 97 | */ |
KAMEZAWA Hiroyuki | 52d4b9a | 2008-10-18 20:28:16 -0700 | [diff] [blame] | 98 | bit_spin_lock(PCG_LOCK, &pc->flags); |
| 99 | } |
| 100 | |
KAMEZAWA Hiroyuki | 52d4b9a | 2008-10-18 20:28:16 -0700 | [diff] [blame] | 101 | static inline void unlock_page_cgroup(struct page_cgroup *pc) |
| 102 | { |
| 103 | bit_spin_unlock(PCG_LOCK, &pc->flags); |
| 104 | } |
| 105 | |
KAMEZAWA Hiroyuki | dbd4ea7 | 2011-01-13 15:47:38 -0800 | [diff] [blame] | 106 | static inline void move_lock_page_cgroup(struct page_cgroup *pc, |
| 107 | unsigned long *flags) |
| 108 | { |
| 109 | /* |
| 110 | * We know updates to pc->flags of page cache's stats are from both of |
| 111 | * usual context or IRQ context. Disable IRQ to avoid deadlock. |
| 112 | */ |
| 113 | local_irq_save(*flags); |
| 114 | bit_spin_lock(PCG_MOVE_LOCK, &pc->flags); |
| 115 | } |
| 116 | |
| 117 | static inline void move_unlock_page_cgroup(struct page_cgroup *pc, |
| 118 | unsigned long *flags) |
| 119 | { |
| 120 | bit_spin_unlock(PCG_MOVE_LOCK, &pc->flags); |
| 121 | local_irq_restore(*flags); |
| 122 | } |
| 123 | |
KAMEZAWA Hiroyuki | 52d4b9a | 2008-10-18 20:28:16 -0700 | [diff] [blame] | 124 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
| 125 | struct page_cgroup; |
| 126 | |
Al Viro | 3116848 | 2008-11-22 17:33:24 +0000 | [diff] [blame] | 127 | static inline void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat) |
KAMEZAWA Hiroyuki | 52d4b9a | 2008-10-18 20:28:16 -0700 | [diff] [blame] | 128 | { |
| 129 | } |
| 130 | |
| 131 | static inline struct page_cgroup *lookup_page_cgroup(struct page *page) |
| 132 | { |
| 133 | return NULL; |
| 134 | } |
KAMEZAWA Hiroyuki | 94b6da5 | 2008-10-22 14:15:05 -0700 | [diff] [blame] | 135 | |
| 136 | static inline void page_cgroup_init(void) |
| 137 | { |
| 138 | } |
| 139 | |
KAMEZAWA Hiroyuki | ca371c0 | 2009-06-12 10:33:53 +0300 | [diff] [blame] | 140 | static inline void __init page_cgroup_init_flatmem(void) |
| 141 | { |
| 142 | } |
| 143 | |
Johannes Weiner | 6b3ae58 | 2011-03-23 16:42:30 -0700 | [diff] [blame] | 144 | #endif /* CONFIG_CGROUP_MEM_RES_CTLR */ |
KAMEZAWA Hiroyuki | 27a7faa | 2009-01-07 18:07:58 -0800 | [diff] [blame] | 145 | |
KAMEZAWA Hiroyuki | 27a7faa | 2009-01-07 18:07:58 -0800 | [diff] [blame] | 146 | #include <linux/swap.h> |
Jaswinder Singh Rajput | 9757275 | 2009-09-20 16:20:44 +0530 | [diff] [blame] | 147 | |
| 148 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP |
Daisuke Nishimura | 0249144 | 2010-03-10 15:22:17 -0800 | [diff] [blame] | 149 | extern unsigned short swap_cgroup_cmpxchg(swp_entry_t ent, |
| 150 | unsigned short old, unsigned short new); |
KAMEZAWA Hiroyuki | a3b2d69 | 2009-04-02 16:57:45 -0700 | [diff] [blame] | 151 | extern unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id); |
Bob Liu | 9fb4b7c | 2012-01-12 17:18:48 -0800 | [diff] [blame^] | 152 | extern unsigned short lookup_swap_cgroup_id(swp_entry_t ent); |
KAMEZAWA Hiroyuki | 27a7faa | 2009-01-07 18:07:58 -0800 | [diff] [blame] | 153 | extern int swap_cgroup_swapon(int type, unsigned long max_pages); |
| 154 | extern void swap_cgroup_swapoff(int type); |
| 155 | #else |
KAMEZAWA Hiroyuki | 27a7faa | 2009-01-07 18:07:58 -0800 | [diff] [blame] | 156 | |
| 157 | static inline |
KAMEZAWA Hiroyuki | a3b2d69 | 2009-04-02 16:57:45 -0700 | [diff] [blame] | 158 | unsigned short swap_cgroup_record(swp_entry_t ent, unsigned short id) |
KAMEZAWA Hiroyuki | 27a7faa | 2009-01-07 18:07:58 -0800 | [diff] [blame] | 159 | { |
KAMEZAWA Hiroyuki | a3b2d69 | 2009-04-02 16:57:45 -0700 | [diff] [blame] | 160 | return 0; |
KAMEZAWA Hiroyuki | 27a7faa | 2009-01-07 18:07:58 -0800 | [diff] [blame] | 161 | } |
| 162 | |
| 163 | static inline |
Bob Liu | 9fb4b7c | 2012-01-12 17:18:48 -0800 | [diff] [blame^] | 164 | unsigned short lookup_swap_cgroup_id(swp_entry_t ent) |
KAMEZAWA Hiroyuki | 27a7faa | 2009-01-07 18:07:58 -0800 | [diff] [blame] | 165 | { |
KAMEZAWA Hiroyuki | a3b2d69 | 2009-04-02 16:57:45 -0700 | [diff] [blame] | 166 | return 0; |
KAMEZAWA Hiroyuki | 27a7faa | 2009-01-07 18:07:58 -0800 | [diff] [blame] | 167 | } |
| 168 | |
| 169 | static inline int |
| 170 | swap_cgroup_swapon(int type, unsigned long max_pages) |
| 171 | { |
| 172 | return 0; |
| 173 | } |
| 174 | |
| 175 | static inline void swap_cgroup_swapoff(int type) |
| 176 | { |
| 177 | return; |
| 178 | } |
| 179 | |
Johannes Weiner | 6b3ae58 | 2011-03-23 16:42:30 -0700 | [diff] [blame] | 180 | #endif /* CONFIG_CGROUP_MEM_RES_CTLR_SWAP */ |
| 181 | |
| 182 | #endif /* !__GENERATING_BOUNDS_H */ |
| 183 | |
| 184 | #endif /* __LINUX_PAGE_CGROUP_H */ |