Balbir Singh | 8cdea7c | 2008-02-07 00:13:50 -0800 | [diff] [blame] | 1 | /* memcontrol.h - Memory Controller |
| 2 | * |
| 3 | * Copyright IBM Corporation, 2007 |
| 4 | * Author Balbir Singh <balbir@linux.vnet.ibm.com> |
| 5 | * |
Pavel Emelianov | 78fb746 | 2008-02-07 00:13:51 -0800 | [diff] [blame] | 6 | * Copyright 2007 OpenVZ SWsoft Inc |
| 7 | * Author: Pavel Emelianov <xemul@openvz.org> |
| 8 | * |
Balbir Singh | 8cdea7c | 2008-02-07 00:13:50 -0800 | [diff] [blame] | 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | */ |
| 19 | |
| 20 | #ifndef _LINUX_MEMCONTROL_H |
| 21 | #define _LINUX_MEMCONTROL_H |
Hirokazu Takahashi | f8d66542 | 2009-01-07 18:08:02 -0800 | [diff] [blame] | 22 | #include <linux/cgroup.h> |
Pavel Emelianov | 78fb746 | 2008-02-07 00:13:51 -0800 | [diff] [blame] | 23 | struct mem_cgroup; |
| 24 | struct page_cgroup; |
Balbir Singh | 8697d33 | 2008-02-07 00:13:59 -0800 | [diff] [blame] | 25 | struct page; |
| 26 | struct mm_struct; |
Pavel Emelianov | 78fb746 | 2008-02-07 00:13:51 -0800 | [diff] [blame] | 27 | |
Balbir Singh | 00f0b82 | 2008-03-04 14:28:39 -0800 | [diff] [blame] | 28 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR |
KAMEZAWA Hiroyuki | 2c26fdd | 2009-01-07 18:08:10 -0800 | [diff] [blame] | 29 | /* |
| 30 | * All "charge" functions with gfp_mask should use GFP_KERNEL or |
| 31 | * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't |
| 32 | * alloc memory but reclaims memory from all available zones. So, "where I want |
| 33 | * memory from" bits of gfp_mask has no meaning. So any bits of that field is |
| 34 | * available but adding a rule is better. charge functions' gfp_mask should |
| 35 | * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous |
| 36 | * codes. |
| 37 | * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.) |
| 38 | */ |
Pavel Emelianov | 78fb746 | 2008-02-07 00:13:51 -0800 | [diff] [blame] | 39 | |
KAMEZAWA Hiroyuki | 7a81b88 | 2009-01-07 18:07:48 -0800 | [diff] [blame] | 40 | extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm, |
Balbir Singh | e1a1cd5 | 2008-02-07 00:14:02 -0800 | [diff] [blame] | 41 | gfp_t gfp_mask); |
KAMEZAWA Hiroyuki | 7a81b88 | 2009-01-07 18:07:48 -0800 | [diff] [blame] | 42 | /* for swap handling */ |
KAMEZAWA Hiroyuki | 8c7c6e34 | 2009-01-07 18:08:00 -0800 | [diff] [blame] | 43 | extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
| 44 | struct page *page, gfp_t mask, struct mem_cgroup **ptr); |
KAMEZAWA Hiroyuki | 7a81b88 | 2009-01-07 18:07:48 -0800 | [diff] [blame] | 45 | extern void mem_cgroup_commit_charge_swapin(struct page *page, |
| 46 | struct mem_cgroup *ptr); |
| 47 | extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr); |
| 48 | |
Hugh Dickins | 8289546 | 2008-03-04 14:29:08 -0800 | [diff] [blame] | 49 | extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, |
| 50 | gfp_t gfp_mask); |
KAMEZAWA Hiroyuki | 08e552c | 2009-01-07 18:08:01 -0800 | [diff] [blame] | 51 | extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru); |
| 52 | extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru); |
| 53 | extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru); |
| 54 | extern void mem_cgroup_del_lru(struct page *page); |
| 55 | extern void mem_cgroup_move_lists(struct page *page, |
| 56 | enum lru_list from, enum lru_list to); |
Balbir Singh | 3c541e1 | 2008-02-07 00:14:41 -0800 | [diff] [blame] | 57 | extern void mem_cgroup_uncharge_page(struct page *page); |
KAMEZAWA Hiroyuki | 69029cd | 2008-07-25 01:47:14 -0700 | [diff] [blame] | 58 | extern void mem_cgroup_uncharge_cache_page(struct page *page); |
Daisuke Nishimura | ae3abae | 2009-04-30 15:08:19 -0700 | [diff] [blame] | 59 | extern int mem_cgroup_shmem_charge_fallback(struct page *page, |
KAMEZAWA Hiroyuki | b5a8431 | 2009-01-07 18:08:35 -0800 | [diff] [blame] | 60 | struct mm_struct *mm, gfp_t gfp_mask); |
KAMEZAWA Hiroyuki | c9b0ed5 | 2008-07-25 01:47:15 -0700 | [diff] [blame] | 61 | |
Balbir Singh | 66e1707 | 2008-02-07 00:13:56 -0800 | [diff] [blame] | 62 | extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, |
| 63 | struct list_head *dst, |
| 64 | unsigned long *scanned, int order, |
| 65 | int mode, struct zone *z, |
| 66 | struct mem_cgroup *mem_cont, |
Rik van Riel | 4f98a2f | 2008-10-18 20:26:32 -0700 | [diff] [blame] | 67 | int active, int file); |
Pavel Emelianov | c7ba5c9 | 2008-02-07 00:13:58 -0800 | [diff] [blame] | 68 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask); |
David Rientjes | 4c4a221 | 2008-02-07 00:14:06 -0800 | [diff] [blame] | 69 | int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem); |
David Rientjes | 3062fc6 | 2008-02-07 00:14:03 -0800 | [diff] [blame] | 70 | |
Balbir Singh | cf475ad | 2008-04-29 01:00:16 -0700 | [diff] [blame] | 71 | extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
| 72 | |
Lai Jiangshan | 2e4d409 | 2009-01-07 18:08:07 -0800 | [diff] [blame] | 73 | static inline |
| 74 | int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup) |
| 75 | { |
| 76 | struct mem_cgroup *mem; |
| 77 | rcu_read_lock(); |
KAMEZAWA Hiroyuki | e638c13 | 2009-04-21 12:24:41 -0700 | [diff] [blame] | 78 | mem = mem_cgroup_from_task(rcu_dereference((mm)->owner)); |
Lai Jiangshan | 2e4d409 | 2009-01-07 18:08:07 -0800 | [diff] [blame] | 79 | rcu_read_unlock(); |
| 80 | return cgroup == mem; |
| 81 | } |
Balbir Singh | 8a9f3cc | 2008-02-07 00:13:53 -0800 | [diff] [blame] | 82 | |
KAMEZAWA Hiroyuki | e8589cc | 2008-07-25 01:47:10 -0700 | [diff] [blame] | 83 | extern int |
KAMEZAWA Hiroyuki | 01b1ae6 | 2009-01-07 18:07:50 -0800 | [diff] [blame] | 84 | mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr); |
| 85 | extern void mem_cgroup_end_migration(struct mem_cgroup *mem, |
| 86 | struct page *oldpage, struct page *newpage); |
KAMEZAWA Hiroyuki | ae41be3 | 2008-02-07 00:14:10 -0800 | [diff] [blame] | 87 | |
KAMEZAWA Hiroyuki | 58ae83d | 2008-02-07 00:14:32 -0800 | [diff] [blame] | 88 | /* |
| 89 | * For memory reclaim. |
| 90 | */ |
KAMEZAWA Hiroyuki | 6c48a1d | 2008-02-07 00:14:34 -0800 | [diff] [blame] | 91 | extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem); |
| 92 | extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, |
| 93 | int priority); |
| 94 | extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, |
| 95 | int priority); |
KOSAKI Motohiro | c772be9 | 2009-01-07 18:08:25 -0800 | [diff] [blame] | 96 | int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg); |
KOSAKI Motohiro | a3d8e05 | 2009-01-07 18:08:19 -0800 | [diff] [blame] | 97 | unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, |
| 98 | struct zone *zone, |
| 99 | enum lru_list lru); |
KOSAKI Motohiro | 3e2f41f | 2009-01-07 18:08:20 -0800 | [diff] [blame] | 100 | struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, |
| 101 | struct zone *zone); |
| 102 | struct zone_reclaim_stat* |
| 103 | mem_cgroup_get_reclaim_stat_from_page(struct page *page); |
Balbir Singh | e222432 | 2009-04-02 16:57:39 -0700 | [diff] [blame] | 104 | extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
| 105 | struct task_struct *p); |
KAMEZAWA Hiroyuki | 58ae83d | 2008-02-07 00:14:32 -0800 | [diff] [blame] | 106 | |
KAMEZAWA Hiroyuki | c077719 | 2009-01-07 18:07:57 -0800 | [diff] [blame] | 107 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP |
| 108 | extern int do_swap_account; |
| 109 | #endif |
Hirokazu Takahashi | f8d66542 | 2009-01-07 18:08:02 -0800 | [diff] [blame] | 110 | |
| 111 | static inline bool mem_cgroup_disabled(void) |
| 112 | { |
| 113 | if (mem_cgroup_subsys.disabled) |
| 114 | return true; |
| 115 | return false; |
| 116 | } |
| 117 | |
KAMEZAWA Hiroyuki | a636b32 | 2009-01-07 18:08:08 -0800 | [diff] [blame] | 118 | extern bool mem_cgroup_oom_called(struct task_struct *task); |
| 119 | |
Balbir Singh | 00f0b82 | 2008-03-04 14:28:39 -0800 | [diff] [blame] | 120 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
KAMEZAWA Hiroyuki | 7a81b88 | 2009-01-07 18:07:48 -0800 | [diff] [blame] | 121 | struct mem_cgroup; |
| 122 | |
| 123 | static inline int mem_cgroup_newpage_charge(struct page *page, |
Hugh Dickins | 8289546 | 2008-03-04 14:29:08 -0800 | [diff] [blame] | 124 | struct mm_struct *mm, gfp_t gfp_mask) |
Balbir Singh | 8a9f3cc | 2008-02-07 00:13:53 -0800 | [diff] [blame] | 125 | { |
| 126 | return 0; |
| 127 | } |
| 128 | |
Hugh Dickins | 8289546 | 2008-03-04 14:29:08 -0800 | [diff] [blame] | 129 | static inline int mem_cgroup_cache_charge(struct page *page, |
| 130 | struct mm_struct *mm, gfp_t gfp_mask) |
Balbir Singh | 8a9f3cc | 2008-02-07 00:13:53 -0800 | [diff] [blame] | 131 | { |
Hugh Dickins | 8289546 | 2008-03-04 14:29:08 -0800 | [diff] [blame] | 132 | return 0; |
Balbir Singh | 8a9f3cc | 2008-02-07 00:13:53 -0800 | [diff] [blame] | 133 | } |
| 134 | |
KAMEZAWA Hiroyuki | 8c7c6e34 | 2009-01-07 18:08:00 -0800 | [diff] [blame] | 135 | static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
| 136 | struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr) |
KAMEZAWA Hiroyuki | 7a81b88 | 2009-01-07 18:07:48 -0800 | [diff] [blame] | 137 | { |
| 138 | return 0; |
| 139 | } |
| 140 | |
| 141 | static inline void mem_cgroup_commit_charge_swapin(struct page *page, |
| 142 | struct mem_cgroup *ptr) |
| 143 | { |
| 144 | } |
| 145 | |
| 146 | static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr) |
| 147 | { |
| 148 | } |
| 149 | |
Balbir Singh | 8a9f3cc | 2008-02-07 00:13:53 -0800 | [diff] [blame] | 150 | static inline void mem_cgroup_uncharge_page(struct page *page) |
| 151 | { |
| 152 | } |
| 153 | |
KAMEZAWA Hiroyuki | 69029cd | 2008-07-25 01:47:14 -0700 | [diff] [blame] | 154 | static inline void mem_cgroup_uncharge_cache_page(struct page *page) |
| 155 | { |
| 156 | } |
| 157 | |
Daisuke Nishimura | ae3abae | 2009-04-30 15:08:19 -0700 | [diff] [blame] | 158 | static inline int mem_cgroup_shmem_charge_fallback(struct page *page, |
KAMEZAWA Hiroyuki | b5a8431 | 2009-01-07 18:08:35 -0800 | [diff] [blame] | 159 | struct mm_struct *mm, gfp_t gfp_mask) |
KAMEZAWA Hiroyuki | c9b0ed5 | 2008-07-25 01:47:15 -0700 | [diff] [blame] | 160 | { |
| 161 | return 0; |
| 162 | } |
| 163 | |
KAMEZAWA Hiroyuki | 08e552c | 2009-01-07 18:08:01 -0800 | [diff] [blame] | 164 | static inline void mem_cgroup_add_lru_list(struct page *page, int lru) |
| 165 | { |
| 166 | } |
| 167 | |
| 168 | static inline void mem_cgroup_del_lru_list(struct page *page, int lru) |
| 169 | { |
| 170 | return ; |
| 171 | } |
| 172 | |
| 173 | static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru) |
| 174 | { |
| 175 | return ; |
| 176 | } |
| 177 | |
| 178 | static inline void mem_cgroup_del_lru(struct page *page) |
| 179 | { |
| 180 | return ; |
| 181 | } |
| 182 | |
| 183 | static inline void |
| 184 | mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to) |
Balbir Singh | 66e1707 | 2008-02-07 00:13:56 -0800 | [diff] [blame] | 185 | { |
| 186 | } |
| 187 | |
Hugh Dickins | bd845e3 | 2008-03-04 14:29:01 -0800 | [diff] [blame] | 188 | static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem) |
Balbir Singh | bed7161 | 2008-02-07 00:14:01 -0800 | [diff] [blame] | 189 | { |
David Rientjes | 60c12b1 | 2008-02-09 00:10:15 -0800 | [diff] [blame] | 190 | return 1; |
Balbir Singh | bed7161 | 2008-02-07 00:14:01 -0800 | [diff] [blame] | 191 | } |
| 192 | |
David Rientjes | 4c4a221 | 2008-02-07 00:14:06 -0800 | [diff] [blame] | 193 | static inline int task_in_mem_cgroup(struct task_struct *task, |
| 194 | const struct mem_cgroup *mem) |
| 195 | { |
| 196 | return 1; |
| 197 | } |
| 198 | |
KAMEZAWA Hiroyuki | e8589cc | 2008-07-25 01:47:10 -0700 | [diff] [blame] | 199 | static inline int |
KAMEZAWA Hiroyuki | 01b1ae6 | 2009-01-07 18:07:50 -0800 | [diff] [blame] | 200 | mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr) |
KAMEZAWA Hiroyuki | ae41be3 | 2008-02-07 00:14:10 -0800 | [diff] [blame] | 201 | { |
| 202 | return 0; |
| 203 | } |
| 204 | |
KAMEZAWA Hiroyuki | 01b1ae6 | 2009-01-07 18:07:50 -0800 | [diff] [blame] | 205 | static inline void mem_cgroup_end_migration(struct mem_cgroup *mem, |
| 206 | struct page *oldpage, |
| 207 | struct page *newpage) |
KAMEZAWA Hiroyuki | ae41be3 | 2008-02-07 00:14:10 -0800 | [diff] [blame] | 208 | { |
| 209 | } |
| 210 | |
KAMEZAWA Hiroyuki | 6c48a1d | 2008-02-07 00:14:34 -0800 | [diff] [blame] | 211 | static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) |
| 212 | { |
| 213 | return 0; |
| 214 | } |
| 215 | |
| 216 | static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, |
| 217 | int priority) |
| 218 | { |
| 219 | } |
| 220 | |
| 221 | static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, |
| 222 | int priority) |
| 223 | { |
| 224 | } |
| 225 | |
Hirokazu Takahashi | f8d66542 | 2009-01-07 18:08:02 -0800 | [diff] [blame] | 226 | static inline bool mem_cgroup_disabled(void) |
| 227 | { |
| 228 | return true; |
| 229 | } |
KAMEZAWA Hiroyuki | a636b32 | 2009-01-07 18:08:08 -0800 | [diff] [blame] | 230 | |
| 231 | static inline bool mem_cgroup_oom_called(struct task_struct *task) |
| 232 | { |
| 233 | return false; |
| 234 | } |
KOSAKI Motohiro | 14797e2 | 2009-01-07 18:08:18 -0800 | [diff] [blame] | 235 | |
| 236 | static inline int |
KOSAKI Motohiro | c772be9 | 2009-01-07 18:08:25 -0800 | [diff] [blame] | 237 | mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg) |
KOSAKI Motohiro | 14797e2 | 2009-01-07 18:08:18 -0800 | [diff] [blame] | 238 | { |
| 239 | return 1; |
| 240 | } |
| 241 | |
KOSAKI Motohiro | a3d8e05 | 2009-01-07 18:08:19 -0800 | [diff] [blame] | 242 | static inline unsigned long |
| 243 | mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone, |
| 244 | enum lru_list lru) |
| 245 | { |
| 246 | return 0; |
| 247 | } |
| 248 | |
| 249 | |
KOSAKI Motohiro | 3e2f41f | 2009-01-07 18:08:20 -0800 | [diff] [blame] | 250 | static inline struct zone_reclaim_stat* |
| 251 | mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone) |
| 252 | { |
| 253 | return NULL; |
| 254 | } |
| 255 | |
| 256 | static inline struct zone_reclaim_stat* |
| 257 | mem_cgroup_get_reclaim_stat_from_page(struct page *page) |
| 258 | { |
| 259 | return NULL; |
| 260 | } |
| 261 | |
Balbir Singh | e222432 | 2009-04-02 16:57:39 -0700 | [diff] [blame] | 262 | static inline void |
| 263 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) |
| 264 | { |
| 265 | } |
| 266 | |
Pavel Emelianov | 78fb746 | 2008-02-07 00:13:51 -0800 | [diff] [blame] | 267 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
| 268 | |
Balbir Singh | 8cdea7c | 2008-02-07 00:13:50 -0800 | [diff] [blame] | 269 | #endif /* _LINUX_MEMCONTROL_H */ |
| 270 | |