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8cdea7c0 BS |
1 | /* memcontrol.h - Memory Controller |
2 | * | |
3 | * Copyright IBM Corporation, 2007 | |
4 | * Author Balbir Singh <balbir@linux.vnet.ibm.com> | |
5 | * | |
78fb7466 PE |
6 | * Copyright 2007 OpenVZ SWsoft Inc |
7 | * Author: Pavel Emelianov <xemul@openvz.org> | |
8 | * | |
8cdea7c0 BS |
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 | |
f8d66542 | 22 | #include <linux/cgroup.h> |
78fb7466 PE |
23 | struct mem_cgroup; |
24 | struct page_cgroup; | |
8697d331 BS |
25 | struct page; |
26 | struct mm_struct; | |
78fb7466 | 27 | |
00f0b825 | 28 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR |
2c26fdd7 KH |
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 | */ | |
78fb7466 | 39 | |
7a81b88c | 40 | extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm, |
e1a1cd59 | 41 | gfp_t gfp_mask); |
7a81b88c | 42 | /* for swap handling */ |
8c7c6e34 KH |
43 | extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
44 | struct page *page, gfp_t mask, struct mem_cgroup **ptr); | |
7a81b88c KH |
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 | ||
8289546e HD |
49 | extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, |
50 | gfp_t gfp_mask); | |
08e552c6 KH |
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); | |
569b846d KH |
57 | |
58 | /* For coalescing uncharge for reducing memcg' overhead*/ | |
59 | extern void mem_cgroup_uncharge_start(void); | |
60 | extern void mem_cgroup_uncharge_end(void); | |
61 | ||
3c541e14 | 62 | extern void mem_cgroup_uncharge_page(struct page *page); |
69029cd5 | 63 | extern void mem_cgroup_uncharge_cache_page(struct page *page); |
ae3abae6 | 64 | extern int mem_cgroup_shmem_charge_fallback(struct page *page, |
b5a84319 | 65 | struct mm_struct *mm, gfp_t gfp_mask); |
c9b0ed51 | 66 | |
66e1707b BS |
67 | extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, |
68 | struct list_head *dst, | |
69 | unsigned long *scanned, int order, | |
70 | int mode, struct zone *z, | |
71 | struct mem_cgroup *mem_cont, | |
4f98a2fe | 72 | int active, int file); |
c7ba5c9e | 73 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask); |
4c4a2214 | 74 | int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem); |
3062fc67 | 75 | |
cf475ad2 BS |
76 | extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
77 | ||
2e4d4091 LJ |
78 | static inline |
79 | int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup) | |
80 | { | |
81 | struct mem_cgroup *mem; | |
82 | rcu_read_lock(); | |
e638c139 | 83 | mem = mem_cgroup_from_task(rcu_dereference((mm)->owner)); |
2e4d4091 LJ |
84 | rcu_read_unlock(); |
85 | return cgroup == mem; | |
86 | } | |
8a9f3ccd | 87 | |
e8589cc1 | 88 | extern int |
01b1ae63 KH |
89 | mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr); |
90 | extern void mem_cgroup_end_migration(struct mem_cgroup *mem, | |
91 | struct page *oldpage, struct page *newpage); | |
ae41be37 | 92 | |
58ae83db KH |
93 | /* |
94 | * For memory reclaim. | |
95 | */ | |
6c48a1d0 KH |
96 | extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem); |
97 | extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, | |
98 | int priority); | |
99 | extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, | |
100 | int priority); | |
c772be93 | 101 | int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg); |
56e49d21 | 102 | int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg); |
a3d8e054 KM |
103 | unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, |
104 | struct zone *zone, | |
105 | enum lru_list lru); | |
3e2f41f1 KM |
106 | struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, |
107 | struct zone *zone); | |
108 | struct zone_reclaim_stat* | |
109 | mem_cgroup_get_reclaim_stat_from_page(struct page *page); | |
e222432b BS |
110 | extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
111 | struct task_struct *p); | |
58ae83db | 112 | |
c077719b KH |
113 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP |
114 | extern int do_swap_account; | |
115 | #endif | |
f8d66542 HT |
116 | |
117 | static inline bool mem_cgroup_disabled(void) | |
118 | { | |
119 | if (mem_cgroup_subsys.disabled) | |
120 | return true; | |
121 | return false; | |
122 | } | |
123 | ||
a636b327 | 124 | extern bool mem_cgroup_oom_called(struct task_struct *task); |
d69b042f | 125 | void mem_cgroup_update_mapped_file_stat(struct page *page, int val); |
4e416953 BS |
126 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
127 | gfp_t gfp_mask, int nid, | |
128 | int zid); | |
52d4b9ac | 129 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
7a81b88c KH |
130 | struct mem_cgroup; |
131 | ||
132 | static inline int mem_cgroup_newpage_charge(struct page *page, | |
8289546e | 133 | struct mm_struct *mm, gfp_t gfp_mask) |
8a9f3ccd BS |
134 | { |
135 | return 0; | |
136 | } | |
137 | ||
8289546e HD |
138 | static inline int mem_cgroup_cache_charge(struct page *page, |
139 | struct mm_struct *mm, gfp_t gfp_mask) | |
8a9f3ccd | 140 | { |
8289546e | 141 | return 0; |
8a9f3ccd BS |
142 | } |
143 | ||
8c7c6e34 KH |
144 | static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
145 | struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr) | |
7a81b88c KH |
146 | { |
147 | return 0; | |
148 | } | |
149 | ||
150 | static inline void mem_cgroup_commit_charge_swapin(struct page *page, | |
151 | struct mem_cgroup *ptr) | |
152 | { | |
153 | } | |
154 | ||
155 | static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr) | |
156 | { | |
157 | } | |
158 | ||
569b846d KH |
159 | static inline void mem_cgroup_uncharge_start(void) |
160 | { | |
161 | } | |
162 | ||
163 | static inline void mem_cgroup_uncharge_end(void) | |
164 | { | |
165 | } | |
166 | ||
8a9f3ccd BS |
167 | static inline void mem_cgroup_uncharge_page(struct page *page) |
168 | { | |
169 | } | |
170 | ||
69029cd5 KH |
171 | static inline void mem_cgroup_uncharge_cache_page(struct page *page) |
172 | { | |
173 | } | |
174 | ||
ae3abae6 | 175 | static inline int mem_cgroup_shmem_charge_fallback(struct page *page, |
b5a84319 | 176 | struct mm_struct *mm, gfp_t gfp_mask) |
c9b0ed51 KH |
177 | { |
178 | return 0; | |
179 | } | |
180 | ||
08e552c6 KH |
181 | static inline void mem_cgroup_add_lru_list(struct page *page, int lru) |
182 | { | |
183 | } | |
184 | ||
185 | static inline void mem_cgroup_del_lru_list(struct page *page, int lru) | |
186 | { | |
187 | return ; | |
188 | } | |
189 | ||
190 | static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru) | |
191 | { | |
192 | return ; | |
193 | } | |
194 | ||
195 | static inline void mem_cgroup_del_lru(struct page *page) | |
196 | { | |
197 | return ; | |
198 | } | |
199 | ||
200 | static inline void | |
201 | mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to) | |
66e1707b BS |
202 | { |
203 | } | |
204 | ||
bd845e38 | 205 | static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem) |
bed7161a | 206 | { |
60c12b12 | 207 | return 1; |
bed7161a BS |
208 | } |
209 | ||
4c4a2214 DR |
210 | static inline int task_in_mem_cgroup(struct task_struct *task, |
211 | const struct mem_cgroup *mem) | |
212 | { | |
213 | return 1; | |
214 | } | |
215 | ||
e8589cc1 | 216 | static inline int |
01b1ae63 | 217 | mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr) |
ae41be37 KH |
218 | { |
219 | return 0; | |
220 | } | |
221 | ||
01b1ae63 KH |
222 | static inline void mem_cgroup_end_migration(struct mem_cgroup *mem, |
223 | struct page *oldpage, | |
224 | struct page *newpage) | |
ae41be37 KH |
225 | { |
226 | } | |
227 | ||
6c48a1d0 KH |
228 | static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) |
229 | { | |
230 | return 0; | |
231 | } | |
232 | ||
233 | static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, | |
234 | int priority) | |
235 | { | |
236 | } | |
237 | ||
238 | static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, | |
239 | int priority) | |
240 | { | |
241 | } | |
242 | ||
f8d66542 HT |
243 | static inline bool mem_cgroup_disabled(void) |
244 | { | |
245 | return true; | |
246 | } | |
a636b327 KH |
247 | |
248 | static inline bool mem_cgroup_oom_called(struct task_struct *task) | |
249 | { | |
250 | return false; | |
251 | } | |
14797e23 KM |
252 | |
253 | static inline int | |
c772be93 | 254 | mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg) |
14797e23 KM |
255 | { |
256 | return 1; | |
257 | } | |
258 | ||
56e49d21 RR |
259 | static inline int |
260 | mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg) | |
261 | { | |
262 | return 1; | |
263 | } | |
264 | ||
a3d8e054 KM |
265 | static inline unsigned long |
266 | mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone, | |
267 | enum lru_list lru) | |
268 | { | |
269 | return 0; | |
270 | } | |
271 | ||
272 | ||
3e2f41f1 KM |
273 | static inline struct zone_reclaim_stat* |
274 | mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone) | |
275 | { | |
276 | return NULL; | |
277 | } | |
278 | ||
279 | static inline struct zone_reclaim_stat* | |
280 | mem_cgroup_get_reclaim_stat_from_page(struct page *page) | |
281 | { | |
282 | return NULL; | |
283 | } | |
284 | ||
e222432b BS |
285 | static inline void |
286 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
287 | { | |
288 | } | |
289 | ||
d69b042f BS |
290 | static inline void mem_cgroup_update_mapped_file_stat(struct page *page, |
291 | int val) | |
292 | { | |
293 | } | |
294 | ||
4e416953 BS |
295 | static inline |
296 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, | |
297 | gfp_t gfp_mask, int nid, int zid) | |
298 | { | |
299 | return 0; | |
300 | } | |
301 | ||
78fb7466 PE |
302 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
303 | ||
8cdea7c0 BS |
304 | #endif /* _LINUX_MEMCONTROL_H */ |
305 |