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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 | |
2a7106f2 GT |
28 | /* Stats that can be updated by kernel. */ |
29 | enum mem_cgroup_page_stat_item { | |
30 | MEMCG_NR_FILE_MAPPED, /* # of pages charged as file rss */ | |
31 | }; | |
32 | ||
8b25c6d2 JW |
33 | extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, |
34 | struct list_head *dst, | |
35 | unsigned long *scanned, int order, | |
36 | int mode, struct zone *z, | |
37 | struct mem_cgroup *mem_cont, | |
38 | int active, int file); | |
39 | ||
00f0b825 | 40 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR |
2c26fdd7 KH |
41 | /* |
42 | * All "charge" functions with gfp_mask should use GFP_KERNEL or | |
43 | * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't | |
44 | * alloc memory but reclaims memory from all available zones. So, "where I want | |
45 | * memory from" bits of gfp_mask has no meaning. So any bits of that field is | |
46 | * available but adding a rule is better. charge functions' gfp_mask should | |
47 | * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous | |
48 | * codes. | |
49 | * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.) | |
50 | */ | |
78fb7466 | 51 | |
7a81b88c | 52 | extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm, |
e1a1cd59 | 53 | gfp_t gfp_mask); |
7a81b88c | 54 | /* for swap handling */ |
8c7c6e34 KH |
55 | extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
56 | struct page *page, gfp_t mask, struct mem_cgroup **ptr); | |
7a81b88c KH |
57 | extern void mem_cgroup_commit_charge_swapin(struct page *page, |
58 | struct mem_cgroup *ptr); | |
59 | extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr); | |
60 | ||
8289546e HD |
61 | extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, |
62 | gfp_t gfp_mask); | |
08e552c6 KH |
63 | extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru); |
64 | extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru); | |
65 | extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru); | |
66 | extern void mem_cgroup_del_lru(struct page *page); | |
67 | extern void mem_cgroup_move_lists(struct page *page, | |
68 | enum lru_list from, enum lru_list to); | |
569b846d KH |
69 | |
70 | /* For coalescing uncharge for reducing memcg' overhead*/ | |
71 | extern void mem_cgroup_uncharge_start(void); | |
72 | extern void mem_cgroup_uncharge_end(void); | |
73 | ||
3c541e14 | 74 | extern void mem_cgroup_uncharge_page(struct page *page); |
69029cd5 | 75 | extern void mem_cgroup_uncharge_cache_page(struct page *page); |
ae3abae6 | 76 | extern int mem_cgroup_shmem_charge_fallback(struct page *page, |
b5a84319 | 77 | struct mm_struct *mm, gfp_t gfp_mask); |
c9b0ed51 | 78 | |
c7ba5c9e | 79 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask); |
4c4a2214 | 80 | int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem); |
3062fc67 | 81 | |
e42d9d5d | 82 | extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page); |
cf475ad2 BS |
83 | extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
84 | ||
2e4d4091 LJ |
85 | static inline |
86 | int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup) | |
87 | { | |
88 | struct mem_cgroup *mem; | |
89 | rcu_read_lock(); | |
e638c139 | 90 | mem = mem_cgroup_from_task(rcu_dereference((mm)->owner)); |
2e4d4091 LJ |
91 | rcu_read_unlock(); |
92 | return cgroup == mem; | |
93 | } | |
8a9f3ccd | 94 | |
d324236b WF |
95 | extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem); |
96 | ||
e8589cc1 | 97 | extern int |
ac39cf8c AM |
98 | mem_cgroup_prepare_migration(struct page *page, |
99 | struct page *newpage, struct mem_cgroup **ptr); | |
01b1ae63 KH |
100 | extern void mem_cgroup_end_migration(struct mem_cgroup *mem, |
101 | struct page *oldpage, struct page *newpage); | |
ae41be37 | 102 | |
58ae83db KH |
103 | /* |
104 | * For memory reclaim. | |
105 | */ | |
c772be93 | 106 | int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg); |
56e49d21 | 107 | int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg); |
a3d8e054 KM |
108 | unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, |
109 | struct zone *zone, | |
110 | enum lru_list lru); | |
3e2f41f1 KM |
111 | struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, |
112 | struct zone *zone); | |
113 | struct zone_reclaim_stat* | |
114 | mem_cgroup_get_reclaim_stat_from_page(struct page *page); | |
e222432b BS |
115 | extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
116 | struct task_struct *p); | |
58ae83db | 117 | |
c077719b KH |
118 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP |
119 | extern int do_swap_account; | |
120 | #endif | |
f8d66542 HT |
121 | |
122 | static inline bool mem_cgroup_disabled(void) | |
123 | { | |
124 | if (mem_cgroup_subsys.disabled) | |
125 | return true; | |
126 | return false; | |
127 | } | |
128 | ||
2a7106f2 GT |
129 | void mem_cgroup_update_page_stat(struct page *page, |
130 | enum mem_cgroup_page_stat_item idx, | |
131 | int val); | |
132 | ||
133 | static inline void mem_cgroup_inc_page_stat(struct page *page, | |
134 | enum mem_cgroup_page_stat_item idx) | |
135 | { | |
136 | mem_cgroup_update_page_stat(page, idx, 1); | |
137 | } | |
138 | ||
139 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
140 | enum mem_cgroup_page_stat_item idx) | |
141 | { | |
142 | mem_cgroup_update_page_stat(page, idx, -1); | |
143 | } | |
144 | ||
4e416953 | 145 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
00918b6a | 146 | gfp_t gfp_mask); |
a63d83f4 DR |
147 | u64 mem_cgroup_get_limit(struct mem_cgroup *mem); |
148 | ||
52d4b9ac | 149 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
7a81b88c KH |
150 | struct mem_cgroup; |
151 | ||
152 | static inline int mem_cgroup_newpage_charge(struct page *page, | |
8289546e | 153 | struct mm_struct *mm, gfp_t gfp_mask) |
8a9f3ccd BS |
154 | { |
155 | return 0; | |
156 | } | |
157 | ||
8289546e HD |
158 | static inline int mem_cgroup_cache_charge(struct page *page, |
159 | struct mm_struct *mm, gfp_t gfp_mask) | |
8a9f3ccd | 160 | { |
8289546e | 161 | return 0; |
8a9f3ccd BS |
162 | } |
163 | ||
8c7c6e34 KH |
164 | static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
165 | struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr) | |
7a81b88c KH |
166 | { |
167 | return 0; | |
168 | } | |
169 | ||
170 | static inline void mem_cgroup_commit_charge_swapin(struct page *page, | |
171 | struct mem_cgroup *ptr) | |
172 | { | |
173 | } | |
174 | ||
175 | static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr) | |
176 | { | |
177 | } | |
178 | ||
569b846d KH |
179 | static inline void mem_cgroup_uncharge_start(void) |
180 | { | |
181 | } | |
182 | ||
183 | static inline void mem_cgroup_uncharge_end(void) | |
184 | { | |
185 | } | |
186 | ||
8a9f3ccd BS |
187 | static inline void mem_cgroup_uncharge_page(struct page *page) |
188 | { | |
189 | } | |
190 | ||
69029cd5 KH |
191 | static inline void mem_cgroup_uncharge_cache_page(struct page *page) |
192 | { | |
193 | } | |
194 | ||
ae3abae6 | 195 | static inline int mem_cgroup_shmem_charge_fallback(struct page *page, |
b5a84319 | 196 | struct mm_struct *mm, gfp_t gfp_mask) |
c9b0ed51 KH |
197 | { |
198 | return 0; | |
199 | } | |
200 | ||
08e552c6 KH |
201 | static inline void mem_cgroup_add_lru_list(struct page *page, int lru) |
202 | { | |
203 | } | |
204 | ||
205 | static inline void mem_cgroup_del_lru_list(struct page *page, int lru) | |
206 | { | |
207 | return ; | |
208 | } | |
209 | ||
210 | static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru) | |
211 | { | |
212 | return ; | |
213 | } | |
214 | ||
215 | static inline void mem_cgroup_del_lru(struct page *page) | |
216 | { | |
217 | return ; | |
218 | } | |
219 | ||
220 | static inline void | |
221 | mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to) | |
66e1707b BS |
222 | { |
223 | } | |
224 | ||
e42d9d5d WF |
225 | static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page) |
226 | { | |
227 | return NULL; | |
228 | } | |
229 | ||
bd845e38 | 230 | static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem) |
bed7161a | 231 | { |
60c12b12 | 232 | return 1; |
bed7161a BS |
233 | } |
234 | ||
4c4a2214 DR |
235 | static inline int task_in_mem_cgroup(struct task_struct *task, |
236 | const struct mem_cgroup *mem) | |
237 | { | |
238 | return 1; | |
239 | } | |
240 | ||
d324236b WF |
241 | static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem) |
242 | { | |
243 | return NULL; | |
244 | } | |
245 | ||
e8589cc1 | 246 | static inline int |
ac39cf8c AM |
247 | mem_cgroup_prepare_migration(struct page *page, struct page *newpage, |
248 | struct mem_cgroup **ptr) | |
ae41be37 KH |
249 | { |
250 | return 0; | |
251 | } | |
252 | ||
01b1ae63 KH |
253 | static inline void mem_cgroup_end_migration(struct mem_cgroup *mem, |
254 | struct page *oldpage, | |
255 | struct page *newpage) | |
ae41be37 KH |
256 | { |
257 | } | |
258 | ||
6c48a1d0 KH |
259 | static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) |
260 | { | |
261 | return 0; | |
262 | } | |
263 | ||
264 | static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, | |
265 | int priority) | |
266 | { | |
267 | } | |
268 | ||
269 | static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, | |
270 | int priority) | |
271 | { | |
272 | } | |
273 | ||
f8d66542 HT |
274 | static inline bool mem_cgroup_disabled(void) |
275 | { | |
276 | return true; | |
277 | } | |
a636b327 | 278 | |
14797e23 | 279 | static inline int |
c772be93 | 280 | mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg) |
14797e23 KM |
281 | { |
282 | return 1; | |
283 | } | |
284 | ||
56e49d21 RR |
285 | static inline int |
286 | mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg) | |
287 | { | |
288 | return 1; | |
289 | } | |
290 | ||
a3d8e054 KM |
291 | static inline unsigned long |
292 | mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone, | |
293 | enum lru_list lru) | |
294 | { | |
295 | return 0; | |
296 | } | |
297 | ||
298 | ||
3e2f41f1 KM |
299 | static inline struct zone_reclaim_stat* |
300 | mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone) | |
301 | { | |
302 | return NULL; | |
303 | } | |
304 | ||
305 | static inline struct zone_reclaim_stat* | |
306 | mem_cgroup_get_reclaim_stat_from_page(struct page *page) | |
307 | { | |
308 | return NULL; | |
309 | } | |
310 | ||
e222432b BS |
311 | static inline void |
312 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
313 | { | |
314 | } | |
315 | ||
2a7106f2 GT |
316 | static inline void mem_cgroup_inc_page_stat(struct page *page, |
317 | enum mem_cgroup_page_stat_item idx) | |
318 | { | |
319 | } | |
320 | ||
321 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
322 | enum mem_cgroup_page_stat_item idx) | |
d69b042f BS |
323 | { |
324 | } | |
325 | ||
4e416953 BS |
326 | static inline |
327 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, | |
00918b6a | 328 | gfp_t gfp_mask) |
4e416953 BS |
329 | { |
330 | return 0; | |
331 | } | |
332 | ||
a63d83f4 DR |
333 | static inline |
334 | u64 mem_cgroup_get_limit(struct mem_cgroup *mem) | |
335 | { | |
336 | return 0; | |
337 | } | |
338 | ||
78fb7466 PE |
339 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
340 | ||
8cdea7c0 BS |
341 | #endif /* _LINUX_MEMCONTROL_H */ |
342 |