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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 KH |
56 | extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
57 | struct page *page, gfp_t mask, struct mem_cgroup **ptr); | |
7a81b88c KH |
58 | extern void mem_cgroup_commit_charge_swapin(struct page *page, |
59 | struct mem_cgroup *ptr); | |
60 | extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr); | |
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 | |
c0ff4b85 R |
80 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask); |
81 | int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *memcg); | |
3062fc67 | 82 | |
e42d9d5d | 83 | extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page); |
cf475ad2 | 84 | extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
a433658c | 85 | extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm); |
cf475ad2 | 86 | |
e1aab161 | 87 | extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg); |
d1a4c0b3 | 88 | extern struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont); |
e1aab161 | 89 | |
2e4d4091 LJ |
90 | static inline |
91 | int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup) | |
92 | { | |
c0ff4b85 | 93 | struct mem_cgroup *memcg; |
2e4d4091 | 94 | rcu_read_lock(); |
c0ff4b85 | 95 | memcg = mem_cgroup_from_task(rcu_dereference((mm)->owner)); |
2e4d4091 | 96 | rcu_read_unlock(); |
c0ff4b85 | 97 | return cgroup == memcg; |
2e4d4091 | 98 | } |
8a9f3ccd | 99 | |
c0ff4b85 | 100 | extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg); |
d324236b | 101 | |
e8589cc1 | 102 | extern int |
ac39cf8c | 103 | mem_cgroup_prepare_migration(struct page *page, |
ef6a3c63 | 104 | struct page *newpage, struct mem_cgroup **ptr, gfp_t gfp_mask); |
c0ff4b85 | 105 | extern void mem_cgroup_end_migration(struct mem_cgroup *memcg, |
50de1dd9 | 106 | struct page *oldpage, struct page *newpage, bool migration_ok); |
ae41be37 | 107 | |
5660048c JW |
108 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
109 | struct mem_cgroup *, | |
110 | struct mem_cgroup_reclaim_cookie *); | |
111 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
112 | ||
58ae83db KH |
113 | /* |
114 | * For memory reclaim. | |
115 | */ | |
9b272977 JW |
116 | int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, |
117 | struct zone *zone); | |
118 | int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg, | |
119 | struct zone *zone); | |
889976db | 120 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
1bac180b | 121 | unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, |
bb2a0de9 | 122 | int nid, int zid, unsigned int lrumask); |
3e2f41f1 KM |
123 | struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, |
124 | struct zone *zone); | |
125 | struct zone_reclaim_stat* | |
126 | mem_cgroup_get_reclaim_stat_from_page(struct page *page); | |
e222432b BS |
127 | extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
128 | struct task_struct *p); | |
ab936cbc KH |
129 | extern void mem_cgroup_replace_page_cache(struct page *oldpage, |
130 | struct page *newpage); | |
58ae83db | 131 | |
c077719b KH |
132 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP |
133 | extern int do_swap_account; | |
134 | #endif | |
f8d66542 HT |
135 | |
136 | static inline bool mem_cgroup_disabled(void) | |
137 | { | |
138 | if (mem_cgroup_subsys.disabled) | |
139 | return true; | |
140 | return false; | |
141 | } | |
142 | ||
2a7106f2 GT |
143 | void mem_cgroup_update_page_stat(struct page *page, |
144 | enum mem_cgroup_page_stat_item idx, | |
145 | int val); | |
146 | ||
147 | static inline void mem_cgroup_inc_page_stat(struct page *page, | |
148 | enum mem_cgroup_page_stat_item idx) | |
149 | { | |
150 | mem_cgroup_update_page_stat(page, idx, 1); | |
151 | } | |
152 | ||
153 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
154 | enum mem_cgroup_page_stat_item idx) | |
155 | { | |
156 | mem_cgroup_update_page_stat(page, idx, -1); | |
157 | } | |
158 | ||
4e416953 | 159 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
0ae5e89c YH |
160 | gfp_t gfp_mask, |
161 | unsigned long *total_scanned); | |
c0ff4b85 | 162 | u64 mem_cgroup_get_limit(struct mem_cgroup *memcg); |
a63d83f4 | 163 | |
456f998e | 164 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx); |
ca3e0214 KH |
165 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
166 | void mem_cgroup_split_huge_fixup(struct page *head, struct page *tail); | |
167 | #endif | |
168 | ||
f212ad7c DN |
169 | #ifdef CONFIG_DEBUG_VM |
170 | bool mem_cgroup_bad_page_check(struct page *page); | |
171 | void mem_cgroup_print_bad_page(struct page *page); | |
172 | #endif | |
52d4b9ac | 173 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
7a81b88c KH |
174 | struct mem_cgroup; |
175 | ||
176 | static inline int mem_cgroup_newpage_charge(struct page *page, | |
8289546e | 177 | struct mm_struct *mm, gfp_t gfp_mask) |
8a9f3ccd BS |
178 | { |
179 | return 0; | |
180 | } | |
181 | ||
8289546e HD |
182 | static inline int mem_cgroup_cache_charge(struct page *page, |
183 | struct mm_struct *mm, gfp_t gfp_mask) | |
8a9f3ccd | 184 | { |
8289546e | 185 | return 0; |
8a9f3ccd BS |
186 | } |
187 | ||
8c7c6e34 KH |
188 | static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
189 | struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr) | |
7a81b88c KH |
190 | { |
191 | return 0; | |
192 | } | |
193 | ||
194 | static inline void mem_cgroup_commit_charge_swapin(struct page *page, | |
195 | struct mem_cgroup *ptr) | |
196 | { | |
197 | } | |
198 | ||
199 | static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr) | |
200 | { | |
201 | } | |
202 | ||
569b846d KH |
203 | static inline void mem_cgroup_uncharge_start(void) |
204 | { | |
205 | } | |
206 | ||
207 | static inline void mem_cgroup_uncharge_end(void) | |
208 | { | |
209 | } | |
210 | ||
8a9f3ccd BS |
211 | static inline void mem_cgroup_uncharge_page(struct page *page) |
212 | { | |
213 | } | |
214 | ||
69029cd5 KH |
215 | static inline void mem_cgroup_uncharge_cache_page(struct page *page) |
216 | { | |
217 | } | |
218 | ||
925b7673 JW |
219 | static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone, |
220 | struct mem_cgroup *memcg) | |
08e552c6 | 221 | { |
925b7673 | 222 | return &zone->lruvec; |
08e552c6 KH |
223 | } |
224 | ||
925b7673 JW |
225 | static inline struct lruvec *mem_cgroup_lru_add_list(struct zone *zone, |
226 | struct page *page, | |
227 | enum lru_list lru) | |
3f58a829 | 228 | { |
925b7673 | 229 | return &zone->lruvec; |
3f58a829 MK |
230 | } |
231 | ||
925b7673 | 232 | static inline void mem_cgroup_lru_del_list(struct page *page, enum lru_list lru) |
08e552c6 | 233 | { |
08e552c6 KH |
234 | } |
235 | ||
925b7673 | 236 | static inline void mem_cgroup_lru_del(struct page *page) |
08e552c6 | 237 | { |
08e552c6 KH |
238 | } |
239 | ||
925b7673 JW |
240 | static inline struct lruvec *mem_cgroup_lru_move_lists(struct zone *zone, |
241 | struct page *page, | |
242 | enum lru_list from, | |
243 | enum lru_list to) | |
66e1707b | 244 | { |
925b7673 | 245 | return &zone->lruvec; |
66e1707b BS |
246 | } |
247 | ||
e42d9d5d WF |
248 | static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page) |
249 | { | |
250 | return NULL; | |
251 | } | |
252 | ||
a433658c KM |
253 | static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm) |
254 | { | |
255 | return NULL; | |
256 | } | |
257 | ||
c0ff4b85 R |
258 | static inline int mm_match_cgroup(struct mm_struct *mm, |
259 | struct mem_cgroup *memcg) | |
bed7161a | 260 | { |
60c12b12 | 261 | return 1; |
bed7161a BS |
262 | } |
263 | ||
4c4a2214 | 264 | static inline int task_in_mem_cgroup(struct task_struct *task, |
c0ff4b85 | 265 | const struct mem_cgroup *memcg) |
4c4a2214 DR |
266 | { |
267 | return 1; | |
268 | } | |
269 | ||
c0ff4b85 R |
270 | static inline struct cgroup_subsys_state |
271 | *mem_cgroup_css(struct mem_cgroup *memcg) | |
d324236b WF |
272 | { |
273 | return NULL; | |
274 | } | |
275 | ||
e8589cc1 | 276 | static inline int |
ac39cf8c | 277 | mem_cgroup_prepare_migration(struct page *page, struct page *newpage, |
ef6a3c63 | 278 | struct mem_cgroup **ptr, gfp_t gfp_mask) |
ae41be37 KH |
279 | { |
280 | return 0; | |
281 | } | |
282 | ||
c0ff4b85 | 283 | static inline void mem_cgroup_end_migration(struct mem_cgroup *memcg, |
50de1dd9 | 284 | struct page *oldpage, struct page *newpage, bool migration_ok) |
ae41be37 KH |
285 | { |
286 | } | |
287 | ||
5660048c JW |
288 | static inline struct mem_cgroup * |
289 | mem_cgroup_iter(struct mem_cgroup *root, | |
290 | struct mem_cgroup *prev, | |
291 | struct mem_cgroup_reclaim_cookie *reclaim) | |
292 | { | |
293 | return NULL; | |
294 | } | |
295 | ||
296 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
297 | struct mem_cgroup *prev) | |
298 | { | |
299 | } | |
300 | ||
c0ff4b85 | 301 | static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *memcg) |
6c48a1d0 KH |
302 | { |
303 | return 0; | |
304 | } | |
305 | ||
c0ff4b85 | 306 | static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *memcg, |
6c48a1d0 KH |
307 | int priority) |
308 | { | |
309 | } | |
310 | ||
c0ff4b85 | 311 | static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *memcg, |
6c48a1d0 KH |
312 | int priority) |
313 | { | |
314 | } | |
315 | ||
f8d66542 HT |
316 | static inline bool mem_cgroup_disabled(void) |
317 | { | |
318 | return true; | |
319 | } | |
a636b327 | 320 | |
14797e23 | 321 | static inline int |
9b272977 | 322 | mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, struct zone *zone) |
14797e23 KM |
323 | { |
324 | return 1; | |
325 | } | |
326 | ||
56e49d21 | 327 | static inline int |
9b272977 | 328 | mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg, struct zone *zone) |
56e49d21 RR |
329 | { |
330 | return 1; | |
331 | } | |
332 | ||
a3d8e054 | 333 | static inline unsigned long |
bb2a0de9 KH |
334 | mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, int nid, int zid, |
335 | unsigned int lru_mask) | |
a3d8e054 KM |
336 | { |
337 | return 0; | |
338 | } | |
339 | ||
340 | ||
3e2f41f1 KM |
341 | static inline struct zone_reclaim_stat* |
342 | mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone) | |
343 | { | |
344 | return NULL; | |
345 | } | |
346 | ||
347 | static inline struct zone_reclaim_stat* | |
348 | mem_cgroup_get_reclaim_stat_from_page(struct page *page) | |
349 | { | |
350 | return NULL; | |
351 | } | |
352 | ||
e222432b BS |
353 | static inline void |
354 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
355 | { | |
356 | } | |
357 | ||
2a7106f2 GT |
358 | static inline void mem_cgroup_inc_page_stat(struct page *page, |
359 | enum mem_cgroup_page_stat_item idx) | |
360 | { | |
361 | } | |
362 | ||
363 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
364 | enum mem_cgroup_page_stat_item idx) | |
d69b042f BS |
365 | { |
366 | } | |
367 | ||
4e416953 BS |
368 | static inline |
369 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, | |
0ae5e89c YH |
370 | gfp_t gfp_mask, |
371 | unsigned long *total_scanned) | |
4e416953 BS |
372 | { |
373 | return 0; | |
374 | } | |
375 | ||
a63d83f4 | 376 | static inline |
c0ff4b85 | 377 | u64 mem_cgroup_get_limit(struct mem_cgroup *memcg) |
a63d83f4 DR |
378 | { |
379 | return 0; | |
380 | } | |
381 | ||
ca3e0214 KH |
382 | static inline void mem_cgroup_split_huge_fixup(struct page *head, |
383 | struct page *tail) | |
384 | { | |
385 | } | |
386 | ||
456f998e YH |
387 | static inline |
388 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) | |
389 | { | |
390 | } | |
ab936cbc KH |
391 | static inline void mem_cgroup_replace_page_cache(struct page *oldpage, |
392 | struct page *newpage) | |
393 | { | |
394 | } | |
78fb7466 PE |
395 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
396 | ||
f212ad7c DN |
397 | #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM) |
398 | static inline bool | |
399 | mem_cgroup_bad_page_check(struct page *page) | |
400 | { | |
401 | return false; | |
402 | } | |
403 | ||
404 | static inline void | |
405 | mem_cgroup_print_bad_page(struct page *page) | |
406 | { | |
407 | } | |
408 | #endif | |
409 | ||
e1aab161 GC |
410 | enum { |
411 | UNDER_LIMIT, | |
412 | SOFT_LIMIT, | |
413 | OVER_LIMIT, | |
414 | }; | |
415 | ||
416 | struct sock; | |
417 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM | |
418 | void sock_update_memcg(struct sock *sk); | |
419 | void sock_release_memcg(struct sock *sk); | |
420 | #else | |
421 | static inline void sock_update_memcg(struct sock *sk) | |
422 | { | |
423 | } | |
424 | static inline void sock_release_memcg(struct sock *sk) | |
425 | { | |
426 | } | |
427 | #endif /* CONFIG_CGROUP_MEM_RES_CTLR_KMEM */ | |
8cdea7c0 BS |
428 | #endif /* _LINUX_MEMCONTROL_H */ |
429 |