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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); | |
3f58a829 | 65 | extern void mem_cgroup_rotate_reclaimable_page(struct page *page); |
08e552c6 KH |
66 | extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru); |
67 | extern void mem_cgroup_del_lru(struct page *page); | |
68 | extern void mem_cgroup_move_lists(struct page *page, | |
69 | enum lru_list from, enum lru_list to); | |
569b846d KH |
70 | |
71 | /* For coalescing uncharge for reducing memcg' overhead*/ | |
72 | extern void mem_cgroup_uncharge_start(void); | |
73 | extern void mem_cgroup_uncharge_end(void); | |
74 | ||
3c541e14 | 75 | extern void mem_cgroup_uncharge_page(struct page *page); |
69029cd5 | 76 | extern void mem_cgroup_uncharge_cache_page(struct page *page); |
ae3abae6 | 77 | extern int mem_cgroup_shmem_charge_fallback(struct page *page, |
b5a84319 | 78 | struct mm_struct *mm, gfp_t gfp_mask); |
c9b0ed51 | 79 | |
c7ba5c9e | 80 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask); |
4c4a2214 | 81 | int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem); |
3062fc67 | 82 | |
e42d9d5d | 83 | extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page); |
cf475ad2 BS |
84 | extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
85 | ||
2e4d4091 LJ |
86 | static inline |
87 | int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup) | |
88 | { | |
89 | struct mem_cgroup *mem; | |
90 | rcu_read_lock(); | |
e638c139 | 91 | mem = mem_cgroup_from_task(rcu_dereference((mm)->owner)); |
2e4d4091 LJ |
92 | rcu_read_unlock(); |
93 | return cgroup == mem; | |
94 | } | |
8a9f3ccd | 95 | |
d324236b WF |
96 | extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem); |
97 | ||
e8589cc1 | 98 | extern int |
ac39cf8c | 99 | mem_cgroup_prepare_migration(struct page *page, |
ef6a3c63 | 100 | struct page *newpage, struct mem_cgroup **ptr, gfp_t gfp_mask); |
01b1ae63 | 101 | extern void mem_cgroup_end_migration(struct mem_cgroup *mem, |
50de1dd9 | 102 | struct page *oldpage, struct page *newpage, bool migration_ok); |
ae41be37 | 103 | |
58ae83db KH |
104 | /* |
105 | * For memory reclaim. | |
106 | */ | |
c772be93 | 107 | int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg); |
56e49d21 | 108 | int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg); |
a3d8e054 KM |
109 | unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, |
110 | struct zone *zone, | |
111 | enum lru_list lru); | |
3e2f41f1 KM |
112 | struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, |
113 | struct zone *zone); | |
114 | struct zone_reclaim_stat* | |
115 | mem_cgroup_get_reclaim_stat_from_page(struct page *page); | |
e222432b BS |
116 | extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
117 | struct task_struct *p); | |
58ae83db | 118 | |
c077719b KH |
119 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP |
120 | extern int do_swap_account; | |
121 | #endif | |
f8d66542 HT |
122 | |
123 | static inline bool mem_cgroup_disabled(void) | |
124 | { | |
125 | if (mem_cgroup_subsys.disabled) | |
126 | return true; | |
127 | return false; | |
128 | } | |
129 | ||
2a7106f2 GT |
130 | void mem_cgroup_update_page_stat(struct page *page, |
131 | enum mem_cgroup_page_stat_item idx, | |
132 | int val); | |
133 | ||
134 | static inline void mem_cgroup_inc_page_stat(struct page *page, | |
135 | enum mem_cgroup_page_stat_item idx) | |
136 | { | |
137 | mem_cgroup_update_page_stat(page, idx, 1); | |
138 | } | |
139 | ||
140 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
141 | enum mem_cgroup_page_stat_item idx) | |
142 | { | |
143 | mem_cgroup_update_page_stat(page, idx, -1); | |
144 | } | |
145 | ||
4e416953 | 146 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
00918b6a | 147 | gfp_t gfp_mask); |
a63d83f4 DR |
148 | u64 mem_cgroup_get_limit(struct mem_cgroup *mem); |
149 | ||
ca3e0214 KH |
150 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
151 | void mem_cgroup_split_huge_fixup(struct page *head, struct page *tail); | |
152 | #endif | |
153 | ||
f212ad7c DN |
154 | #ifdef CONFIG_DEBUG_VM |
155 | bool mem_cgroup_bad_page_check(struct page *page); | |
156 | void mem_cgroup_print_bad_page(struct page *page); | |
157 | #endif | |
52d4b9ac | 158 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
7a81b88c KH |
159 | struct mem_cgroup; |
160 | ||
161 | static inline int mem_cgroup_newpage_charge(struct page *page, | |
8289546e | 162 | struct mm_struct *mm, gfp_t gfp_mask) |
8a9f3ccd BS |
163 | { |
164 | return 0; | |
165 | } | |
166 | ||
8289546e HD |
167 | static inline int mem_cgroup_cache_charge(struct page *page, |
168 | struct mm_struct *mm, gfp_t gfp_mask) | |
8a9f3ccd | 169 | { |
8289546e | 170 | return 0; |
8a9f3ccd BS |
171 | } |
172 | ||
8c7c6e34 KH |
173 | static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
174 | struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr) | |
7a81b88c KH |
175 | { |
176 | return 0; | |
177 | } | |
178 | ||
179 | static inline void mem_cgroup_commit_charge_swapin(struct page *page, | |
180 | struct mem_cgroup *ptr) | |
181 | { | |
182 | } | |
183 | ||
184 | static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr) | |
185 | { | |
186 | } | |
187 | ||
569b846d KH |
188 | static inline void mem_cgroup_uncharge_start(void) |
189 | { | |
190 | } | |
191 | ||
192 | static inline void mem_cgroup_uncharge_end(void) | |
193 | { | |
194 | } | |
195 | ||
8a9f3ccd BS |
196 | static inline void mem_cgroup_uncharge_page(struct page *page) |
197 | { | |
198 | } | |
199 | ||
69029cd5 KH |
200 | static inline void mem_cgroup_uncharge_cache_page(struct page *page) |
201 | { | |
202 | } | |
203 | ||
ae3abae6 | 204 | static inline int mem_cgroup_shmem_charge_fallback(struct page *page, |
b5a84319 | 205 | struct mm_struct *mm, gfp_t gfp_mask) |
c9b0ed51 KH |
206 | { |
207 | return 0; | |
208 | } | |
209 | ||
08e552c6 KH |
210 | static inline void mem_cgroup_add_lru_list(struct page *page, int lru) |
211 | { | |
212 | } | |
213 | ||
214 | static inline void mem_cgroup_del_lru_list(struct page *page, int lru) | |
215 | { | |
216 | return ; | |
217 | } | |
218 | ||
67954fe9 | 219 | static inline void mem_cgroup_rotate_reclaimable_page(struct page *page) |
3f58a829 MK |
220 | { |
221 | return ; | |
222 | } | |
223 | ||
08e552c6 KH |
224 | static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru) |
225 | { | |
226 | return ; | |
227 | } | |
228 | ||
229 | static inline void mem_cgroup_del_lru(struct page *page) | |
230 | { | |
231 | return ; | |
232 | } | |
233 | ||
234 | static inline void | |
235 | mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to) | |
66e1707b BS |
236 | { |
237 | } | |
238 | ||
e42d9d5d WF |
239 | static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page) |
240 | { | |
241 | return NULL; | |
242 | } | |
243 | ||
bd845e38 | 244 | static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem) |
bed7161a | 245 | { |
60c12b12 | 246 | return 1; |
bed7161a BS |
247 | } |
248 | ||
4c4a2214 DR |
249 | static inline int task_in_mem_cgroup(struct task_struct *task, |
250 | const struct mem_cgroup *mem) | |
251 | { | |
252 | return 1; | |
253 | } | |
254 | ||
d324236b WF |
255 | static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem) |
256 | { | |
257 | return NULL; | |
258 | } | |
259 | ||
e8589cc1 | 260 | static inline int |
ac39cf8c | 261 | mem_cgroup_prepare_migration(struct page *page, struct page *newpage, |
ef6a3c63 | 262 | struct mem_cgroup **ptr, gfp_t gfp_mask) |
ae41be37 KH |
263 | { |
264 | return 0; | |
265 | } | |
266 | ||
01b1ae63 | 267 | static inline void mem_cgroup_end_migration(struct mem_cgroup *mem, |
50de1dd9 | 268 | struct page *oldpage, struct page *newpage, bool migration_ok) |
ae41be37 KH |
269 | { |
270 | } | |
271 | ||
6c48a1d0 KH |
272 | static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) |
273 | { | |
274 | return 0; | |
275 | } | |
276 | ||
277 | static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, | |
278 | int priority) | |
279 | { | |
280 | } | |
281 | ||
282 | static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, | |
283 | int priority) | |
284 | { | |
285 | } | |
286 | ||
f8d66542 HT |
287 | static inline bool mem_cgroup_disabled(void) |
288 | { | |
289 | return true; | |
290 | } | |
a636b327 | 291 | |
14797e23 | 292 | static inline int |
c772be93 | 293 | mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg) |
14797e23 KM |
294 | { |
295 | return 1; | |
296 | } | |
297 | ||
56e49d21 RR |
298 | static inline int |
299 | mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg) | |
300 | { | |
301 | return 1; | |
302 | } | |
303 | ||
a3d8e054 KM |
304 | static inline unsigned long |
305 | mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone, | |
306 | enum lru_list lru) | |
307 | { | |
308 | return 0; | |
309 | } | |
310 | ||
311 | ||
3e2f41f1 KM |
312 | static inline struct zone_reclaim_stat* |
313 | mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone) | |
314 | { | |
315 | return NULL; | |
316 | } | |
317 | ||
318 | static inline struct zone_reclaim_stat* | |
319 | mem_cgroup_get_reclaim_stat_from_page(struct page *page) | |
320 | { | |
321 | return NULL; | |
322 | } | |
323 | ||
e222432b BS |
324 | static inline void |
325 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
326 | { | |
327 | } | |
328 | ||
2a7106f2 GT |
329 | static inline void mem_cgroup_inc_page_stat(struct page *page, |
330 | enum mem_cgroup_page_stat_item idx) | |
331 | { | |
332 | } | |
333 | ||
334 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
335 | enum mem_cgroup_page_stat_item idx) | |
d69b042f BS |
336 | { |
337 | } | |
338 | ||
4e416953 BS |
339 | static inline |
340 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, | |
00918b6a | 341 | gfp_t gfp_mask) |
4e416953 BS |
342 | { |
343 | return 0; | |
344 | } | |
345 | ||
a63d83f4 DR |
346 | static inline |
347 | u64 mem_cgroup_get_limit(struct mem_cgroup *mem) | |
348 | { | |
349 | return 0; | |
350 | } | |
351 | ||
ca3e0214 KH |
352 | static inline void mem_cgroup_split_huge_fixup(struct page *head, |
353 | struct page *tail) | |
354 | { | |
355 | } | |
356 | ||
78fb7466 PE |
357 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
358 | ||
f212ad7c DN |
359 | #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM) |
360 | static inline bool | |
361 | mem_cgroup_bad_page_check(struct page *page) | |
362 | { | |
363 | return false; | |
364 | } | |
365 | ||
366 | static inline void | |
367 | mem_cgroup_print_bad_page(struct page *page) | |
368 | { | |
369 | } | |
370 | #endif | |
371 | ||
8cdea7c0 BS |
372 | #endif /* _LINUX_MEMCONTROL_H */ |
373 |