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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> |
456f998e YH |
23 | #include <linux/vm_event_item.h> |
24 | ||
78fb7466 PE |
25 | struct mem_cgroup; |
26 | struct page_cgroup; | |
8697d331 BS |
27 | struct page; |
28 | struct mm_struct; | |
78fb7466 | 29 | |
2a7106f2 GT |
30 | /* Stats that can be updated by kernel. */ |
31 | enum mem_cgroup_page_stat_item { | |
32 | MEMCG_NR_FILE_MAPPED, /* # of pages charged as file rss */ | |
33 | }; | |
34 | ||
5660048c JW |
35 | struct mem_cgroup_reclaim_cookie { |
36 | struct zone *zone; | |
37 | int priority; | |
38 | unsigned int generation; | |
39 | }; | |
40 | ||
00f0b825 | 41 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR |
2c26fdd7 KH |
42 | /* |
43 | * All "charge" functions with gfp_mask should use GFP_KERNEL or | |
44 | * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't | |
45 | * alloc memory but reclaims memory from all available zones. So, "where I want | |
46 | * memory from" bits of gfp_mask has no meaning. So any bits of that field is | |
47 | * available but adding a rule is better. charge functions' gfp_mask should | |
48 | * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous | |
49 | * codes. | |
50 | * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.) | |
51 | */ | |
78fb7466 | 52 | |
7a81b88c | 53 | extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm, |
e1a1cd59 | 54 | gfp_t gfp_mask); |
7a81b88c | 55 | /* for swap handling */ |
8c7c6e34 | 56 | extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
72835c86 | 57 | struct page *page, gfp_t mask, struct mem_cgroup **memcgp); |
7a81b88c | 58 | extern void mem_cgroup_commit_charge_swapin(struct page *page, |
72835c86 JW |
59 | struct mem_cgroup *memcg); |
60 | extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg); | |
7a81b88c | 61 | |
8289546e HD |
62 | extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, |
63 | gfp_t gfp_mask); | |
925b7673 JW |
64 | |
65 | struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *); | |
66 | struct lruvec *mem_cgroup_lru_add_list(struct zone *, struct page *, | |
67 | enum lru_list); | |
68 | void mem_cgroup_lru_del_list(struct page *, enum lru_list); | |
69 | void mem_cgroup_lru_del(struct page *); | |
70 | struct lruvec *mem_cgroup_lru_move_lists(struct zone *, struct page *, | |
71 | enum lru_list, enum lru_list); | |
569b846d KH |
72 | |
73 | /* For coalescing uncharge for reducing memcg' overhead*/ | |
74 | extern void mem_cgroup_uncharge_start(void); | |
75 | extern void mem_cgroup_uncharge_end(void); | |
76 | ||
3c541e14 | 77 | extern void mem_cgroup_uncharge_page(struct page *page); |
69029cd5 | 78 | extern void mem_cgroup_uncharge_cache_page(struct page *page); |
c9b0ed51 | 79 | |
e845e199 DR |
80 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask, |
81 | int order); | |
c0ff4b85 | 82 | int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *memcg); |
3062fc67 | 83 | |
e42d9d5d | 84 | extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page); |
cf475ad2 | 85 | extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
a433658c | 86 | extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm); |
cf475ad2 | 87 | |
e1aab161 | 88 | extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg); |
d1a4c0b3 | 89 | extern struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont); |
e1aab161 | 90 | |
2e4d4091 LJ |
91 | static inline |
92 | int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup) | |
93 | { | |
c0ff4b85 | 94 | struct mem_cgroup *memcg; |
2e4d4091 | 95 | rcu_read_lock(); |
c0ff4b85 | 96 | memcg = mem_cgroup_from_task(rcu_dereference((mm)->owner)); |
2e4d4091 | 97 | rcu_read_unlock(); |
c0ff4b85 | 98 | return cgroup == memcg; |
2e4d4091 | 99 | } |
8a9f3ccd | 100 | |
c0ff4b85 | 101 | extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg); |
d324236b | 102 | |
e8589cc1 | 103 | extern int |
ac39cf8c | 104 | mem_cgroup_prepare_migration(struct page *page, |
72835c86 | 105 | struct page *newpage, struct mem_cgroup **memcgp, gfp_t gfp_mask); |
c0ff4b85 | 106 | extern void mem_cgroup_end_migration(struct mem_cgroup *memcg, |
50de1dd9 | 107 | struct page *oldpage, struct page *newpage, bool migration_ok); |
ae41be37 | 108 | |
5660048c JW |
109 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
110 | struct mem_cgroup *, | |
111 | struct mem_cgroup_reclaim_cookie *); | |
112 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
113 | ||
58ae83db KH |
114 | /* |
115 | * For memory reclaim. | |
116 | */ | |
9b272977 JW |
117 | int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, |
118 | struct zone *zone); | |
119 | int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg, | |
120 | struct zone *zone); | |
889976db | 121 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
1bac180b | 122 | unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, |
bb2a0de9 | 123 | int nid, int zid, unsigned int lrumask); |
3e2f41f1 KM |
124 | struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, |
125 | struct zone *zone); | |
126 | struct zone_reclaim_stat* | |
127 | mem_cgroup_get_reclaim_stat_from_page(struct page *page); | |
e222432b BS |
128 | extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
129 | struct task_struct *p); | |
ab936cbc KH |
130 | extern void mem_cgroup_replace_page_cache(struct page *oldpage, |
131 | struct page *newpage); | |
58ae83db | 132 | |
c077719b KH |
133 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP |
134 | extern int do_swap_account; | |
135 | #endif | |
f8d66542 HT |
136 | |
137 | static inline bool mem_cgroup_disabled(void) | |
138 | { | |
139 | if (mem_cgroup_subsys.disabled) | |
140 | return true; | |
141 | return false; | |
142 | } | |
143 | ||
89c06bd5 KH |
144 | void __mem_cgroup_begin_update_page_stat(struct page *page, bool *locked, |
145 | unsigned long *flags); | |
146 | ||
147 | static inline void mem_cgroup_begin_update_page_stat(struct page *page, | |
148 | bool *locked, unsigned long *flags) | |
149 | { | |
150 | if (mem_cgroup_disabled()) | |
151 | return; | |
152 | rcu_read_lock(); | |
153 | *locked = false; | |
154 | return __mem_cgroup_begin_update_page_stat(page, locked, flags); | |
155 | } | |
156 | ||
157 | void __mem_cgroup_end_update_page_stat(struct page *page, | |
158 | unsigned long *flags); | |
159 | static inline void mem_cgroup_end_update_page_stat(struct page *page, | |
160 | bool *locked, unsigned long *flags) | |
161 | { | |
162 | if (mem_cgroup_disabled()) | |
163 | return; | |
164 | if (*locked) | |
165 | __mem_cgroup_end_update_page_stat(page, flags); | |
166 | rcu_read_unlock(); | |
167 | } | |
168 | ||
2a7106f2 GT |
169 | void mem_cgroup_update_page_stat(struct page *page, |
170 | enum mem_cgroup_page_stat_item idx, | |
171 | int val); | |
172 | ||
173 | static inline void mem_cgroup_inc_page_stat(struct page *page, | |
174 | enum mem_cgroup_page_stat_item idx) | |
175 | { | |
176 | mem_cgroup_update_page_stat(page, idx, 1); | |
177 | } | |
178 | ||
179 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
180 | enum mem_cgroup_page_stat_item idx) | |
181 | { | |
182 | mem_cgroup_update_page_stat(page, idx, -1); | |
183 | } | |
184 | ||
4e416953 | 185 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
0ae5e89c YH |
186 | gfp_t gfp_mask, |
187 | unsigned long *total_scanned); | |
c0ff4b85 | 188 | u64 mem_cgroup_get_limit(struct mem_cgroup *memcg); |
a63d83f4 | 189 | |
456f998e | 190 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx); |
ca3e0214 | 191 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 192 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
193 | #endif |
194 | ||
f212ad7c DN |
195 | #ifdef CONFIG_DEBUG_VM |
196 | bool mem_cgroup_bad_page_check(struct page *page); | |
197 | void mem_cgroup_print_bad_page(struct page *page); | |
198 | #endif | |
52d4b9ac | 199 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
7a81b88c KH |
200 | struct mem_cgroup; |
201 | ||
202 | static inline int mem_cgroup_newpage_charge(struct page *page, | |
8289546e | 203 | struct mm_struct *mm, gfp_t gfp_mask) |
8a9f3ccd BS |
204 | { |
205 | return 0; | |
206 | } | |
207 | ||
8289546e HD |
208 | static inline int mem_cgroup_cache_charge(struct page *page, |
209 | struct mm_struct *mm, gfp_t gfp_mask) | |
8a9f3ccd | 210 | { |
8289546e | 211 | return 0; |
8a9f3ccd BS |
212 | } |
213 | ||
8c7c6e34 | 214 | static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
72835c86 | 215 | struct page *page, gfp_t gfp_mask, struct mem_cgroup **memcgp) |
7a81b88c KH |
216 | { |
217 | return 0; | |
218 | } | |
219 | ||
220 | static inline void mem_cgroup_commit_charge_swapin(struct page *page, | |
72835c86 | 221 | struct mem_cgroup *memcg) |
7a81b88c KH |
222 | { |
223 | } | |
224 | ||
72835c86 | 225 | static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg) |
7a81b88c KH |
226 | { |
227 | } | |
228 | ||
569b846d KH |
229 | static inline void mem_cgroup_uncharge_start(void) |
230 | { | |
231 | } | |
232 | ||
233 | static inline void mem_cgroup_uncharge_end(void) | |
234 | { | |
235 | } | |
236 | ||
8a9f3ccd BS |
237 | static inline void mem_cgroup_uncharge_page(struct page *page) |
238 | { | |
239 | } | |
240 | ||
69029cd5 KH |
241 | static inline void mem_cgroup_uncharge_cache_page(struct page *page) |
242 | { | |
243 | } | |
244 | ||
925b7673 JW |
245 | static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone, |
246 | struct mem_cgroup *memcg) | |
08e552c6 | 247 | { |
925b7673 | 248 | return &zone->lruvec; |
08e552c6 KH |
249 | } |
250 | ||
925b7673 JW |
251 | static inline struct lruvec *mem_cgroup_lru_add_list(struct zone *zone, |
252 | struct page *page, | |
253 | enum lru_list lru) | |
3f58a829 | 254 | { |
925b7673 | 255 | return &zone->lruvec; |
3f58a829 MK |
256 | } |
257 | ||
925b7673 | 258 | static inline void mem_cgroup_lru_del_list(struct page *page, enum lru_list lru) |
08e552c6 | 259 | { |
08e552c6 KH |
260 | } |
261 | ||
925b7673 | 262 | static inline void mem_cgroup_lru_del(struct page *page) |
08e552c6 | 263 | { |
08e552c6 KH |
264 | } |
265 | ||
925b7673 JW |
266 | static inline struct lruvec *mem_cgroup_lru_move_lists(struct zone *zone, |
267 | struct page *page, | |
268 | enum lru_list from, | |
269 | enum lru_list to) | |
66e1707b | 270 | { |
925b7673 | 271 | return &zone->lruvec; |
66e1707b BS |
272 | } |
273 | ||
e42d9d5d WF |
274 | static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page) |
275 | { | |
276 | return NULL; | |
277 | } | |
278 | ||
a433658c KM |
279 | static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm) |
280 | { | |
281 | return NULL; | |
282 | } | |
283 | ||
c0ff4b85 R |
284 | static inline int mm_match_cgroup(struct mm_struct *mm, |
285 | struct mem_cgroup *memcg) | |
bed7161a | 286 | { |
60c12b12 | 287 | return 1; |
bed7161a BS |
288 | } |
289 | ||
4c4a2214 | 290 | static inline int task_in_mem_cgroup(struct task_struct *task, |
c0ff4b85 | 291 | const struct mem_cgroup *memcg) |
4c4a2214 DR |
292 | { |
293 | return 1; | |
294 | } | |
295 | ||
c0ff4b85 R |
296 | static inline struct cgroup_subsys_state |
297 | *mem_cgroup_css(struct mem_cgroup *memcg) | |
d324236b WF |
298 | { |
299 | return NULL; | |
300 | } | |
301 | ||
e8589cc1 | 302 | static inline int |
ac39cf8c | 303 | mem_cgroup_prepare_migration(struct page *page, struct page *newpage, |
72835c86 | 304 | struct mem_cgroup **memcgp, gfp_t gfp_mask) |
ae41be37 KH |
305 | { |
306 | return 0; | |
307 | } | |
308 | ||
c0ff4b85 | 309 | static inline void mem_cgroup_end_migration(struct mem_cgroup *memcg, |
50de1dd9 | 310 | struct page *oldpage, struct page *newpage, bool migration_ok) |
ae41be37 KH |
311 | { |
312 | } | |
313 | ||
5660048c JW |
314 | static inline struct mem_cgroup * |
315 | mem_cgroup_iter(struct mem_cgroup *root, | |
316 | struct mem_cgroup *prev, | |
317 | struct mem_cgroup_reclaim_cookie *reclaim) | |
318 | { | |
319 | return NULL; | |
320 | } | |
321 | ||
322 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
323 | struct mem_cgroup *prev) | |
324 | { | |
325 | } | |
326 | ||
f8d66542 HT |
327 | static inline bool mem_cgroup_disabled(void) |
328 | { | |
329 | return true; | |
330 | } | |
a636b327 | 331 | |
14797e23 | 332 | static inline int |
9b272977 | 333 | mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, struct zone *zone) |
14797e23 KM |
334 | { |
335 | return 1; | |
336 | } | |
337 | ||
56e49d21 | 338 | static inline int |
9b272977 | 339 | mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg, struct zone *zone) |
56e49d21 RR |
340 | { |
341 | return 1; | |
342 | } | |
343 | ||
a3d8e054 | 344 | static inline unsigned long |
bb2a0de9 KH |
345 | mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, int nid, int zid, |
346 | unsigned int lru_mask) | |
a3d8e054 KM |
347 | { |
348 | return 0; | |
349 | } | |
350 | ||
351 | ||
3e2f41f1 KM |
352 | static inline struct zone_reclaim_stat* |
353 | mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone) | |
354 | { | |
355 | return NULL; | |
356 | } | |
357 | ||
358 | static inline struct zone_reclaim_stat* | |
359 | mem_cgroup_get_reclaim_stat_from_page(struct page *page) | |
360 | { | |
361 | return NULL; | |
362 | } | |
363 | ||
e222432b BS |
364 | static inline void |
365 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
366 | { | |
367 | } | |
368 | ||
89c06bd5 KH |
369 | static inline void mem_cgroup_begin_update_page_stat(struct page *page, |
370 | bool *locked, unsigned long *flags) | |
371 | { | |
372 | } | |
373 | ||
374 | static inline void mem_cgroup_end_update_page_stat(struct page *page, | |
375 | bool *locked, unsigned long *flags) | |
376 | { | |
377 | } | |
378 | ||
2a7106f2 GT |
379 | static inline void mem_cgroup_inc_page_stat(struct page *page, |
380 | enum mem_cgroup_page_stat_item idx) | |
381 | { | |
382 | } | |
383 | ||
384 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
385 | enum mem_cgroup_page_stat_item idx) | |
d69b042f BS |
386 | { |
387 | } | |
388 | ||
4e416953 BS |
389 | static inline |
390 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, | |
0ae5e89c YH |
391 | gfp_t gfp_mask, |
392 | unsigned long *total_scanned) | |
4e416953 BS |
393 | { |
394 | return 0; | |
395 | } | |
396 | ||
a63d83f4 | 397 | static inline |
c0ff4b85 | 398 | u64 mem_cgroup_get_limit(struct mem_cgroup *memcg) |
a63d83f4 DR |
399 | { |
400 | return 0; | |
401 | } | |
402 | ||
e94c8a9c | 403 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
404 | { |
405 | } | |
406 | ||
456f998e YH |
407 | static inline |
408 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) | |
409 | { | |
410 | } | |
ab936cbc KH |
411 | static inline void mem_cgroup_replace_page_cache(struct page *oldpage, |
412 | struct page *newpage) | |
413 | { | |
414 | } | |
31a79235 | 415 | #endif /* CONFIG_CGROUP_MEM_RES_CTLR */ |
78fb7466 | 416 | |
f212ad7c DN |
417 | #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM) |
418 | static inline bool | |
419 | mem_cgroup_bad_page_check(struct page *page) | |
420 | { | |
421 | return false; | |
422 | } | |
423 | ||
424 | static inline void | |
425 | mem_cgroup_print_bad_page(struct page *page) | |
426 | { | |
427 | } | |
428 | #endif | |
429 | ||
e1aab161 GC |
430 | enum { |
431 | UNDER_LIMIT, | |
432 | SOFT_LIMIT, | |
433 | OVER_LIMIT, | |
434 | }; | |
435 | ||
436 | struct sock; | |
437 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM | |
438 | void sock_update_memcg(struct sock *sk); | |
439 | void sock_release_memcg(struct sock *sk); | |
440 | #else | |
441 | static inline void sock_update_memcg(struct sock *sk) | |
442 | { | |
443 | } | |
444 | static inline void sock_release_memcg(struct sock *sk) | |
445 | { | |
446 | } | |
447 | #endif /* CONFIG_CGROUP_MEM_RES_CTLR_KMEM */ | |
8cdea7c0 BS |
448 | #endif /* _LINUX_MEMCONTROL_H */ |
449 |