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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); | |
925b7673 JW |
69 | struct lruvec *mem_cgroup_lru_move_lists(struct zone *, struct page *, |
70 | enum lru_list, enum lru_list); | |
569b846d KH |
71 | |
72 | /* For coalescing uncharge for reducing memcg' overhead*/ | |
73 | extern void mem_cgroup_uncharge_start(void); | |
74 | extern void mem_cgroup_uncharge_end(void); | |
75 | ||
3c541e14 | 76 | extern void mem_cgroup_uncharge_page(struct page *page); |
69029cd5 | 77 | extern void mem_cgroup_uncharge_cache_page(struct page *page); |
c9b0ed51 | 78 | |
e845e199 DR |
79 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask, |
80 | int order); | |
c3ac9a8a JW |
81 | bool __mem_cgroup_same_or_subtree(const struct mem_cgroup *root_memcg, |
82 | struct mem_cgroup *memcg); | |
c0ff4b85 | 83 | int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *memcg); |
3062fc67 | 84 | |
e42d9d5d | 85 | extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page); |
cf475ad2 | 86 | extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
a433658c | 87 | extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm); |
cf475ad2 | 88 | |
e1aab161 | 89 | extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg); |
d1a4c0b3 | 90 | extern struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont); |
e1aab161 | 91 | |
2e4d4091 LJ |
92 | static inline |
93 | int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup) | |
94 | { | |
c0ff4b85 | 95 | struct mem_cgroup *memcg; |
c3ac9a8a JW |
96 | int match; |
97 | ||
2e4d4091 | 98 | rcu_read_lock(); |
c0ff4b85 | 99 | memcg = mem_cgroup_from_task(rcu_dereference((mm)->owner)); |
c3ac9a8a | 100 | match = __mem_cgroup_same_or_subtree(cgroup, memcg); |
2e4d4091 | 101 | rcu_read_unlock(); |
c3ac9a8a | 102 | return match; |
2e4d4091 | 103 | } |
8a9f3ccd | 104 | |
c0ff4b85 | 105 | extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg); |
d324236b | 106 | |
e8589cc1 | 107 | extern int |
ac39cf8c | 108 | mem_cgroup_prepare_migration(struct page *page, |
72835c86 | 109 | struct page *newpage, struct mem_cgroup **memcgp, gfp_t gfp_mask); |
c0ff4b85 | 110 | extern void mem_cgroup_end_migration(struct mem_cgroup *memcg, |
50de1dd9 | 111 | struct page *oldpage, struct page *newpage, bool migration_ok); |
ae41be37 | 112 | |
5660048c JW |
113 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
114 | struct mem_cgroup *, | |
115 | struct mem_cgroup_reclaim_cookie *); | |
116 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
117 | ||
58ae83db KH |
118 | /* |
119 | * For memory reclaim. | |
120 | */ | |
c56d5c7d KK |
121 | int mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec); |
122 | int mem_cgroup_inactive_file_is_low(struct lruvec *lruvec); | |
889976db | 123 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
074291fe | 124 | unsigned long mem_cgroup_get_lruvec_size(struct lruvec *lruvec, enum lru_list); |
3e2f41f1 KM |
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 | ||
89c06bd5 KH |
143 | void __mem_cgroup_begin_update_page_stat(struct page *page, bool *locked, |
144 | unsigned long *flags); | |
145 | ||
4331f7d3 KH |
146 | extern atomic_t memcg_moving; |
147 | ||
89c06bd5 KH |
148 | static inline void mem_cgroup_begin_update_page_stat(struct page *page, |
149 | bool *locked, unsigned long *flags) | |
150 | { | |
151 | if (mem_cgroup_disabled()) | |
152 | return; | |
153 | rcu_read_lock(); | |
154 | *locked = false; | |
4331f7d3 KH |
155 | if (atomic_read(&memcg_moving)) |
156 | __mem_cgroup_begin_update_page_stat(page, locked, flags); | |
89c06bd5 KH |
157 | } |
158 | ||
159 | void __mem_cgroup_end_update_page_stat(struct page *page, | |
160 | unsigned long *flags); | |
161 | static inline void mem_cgroup_end_update_page_stat(struct page *page, | |
162 | bool *locked, unsigned long *flags) | |
163 | { | |
164 | if (mem_cgroup_disabled()) | |
165 | return; | |
166 | if (*locked) | |
167 | __mem_cgroup_end_update_page_stat(page, flags); | |
168 | rcu_read_unlock(); | |
169 | } | |
170 | ||
2a7106f2 GT |
171 | void mem_cgroup_update_page_stat(struct page *page, |
172 | enum mem_cgroup_page_stat_item idx, | |
173 | int val); | |
174 | ||
175 | static inline void mem_cgroup_inc_page_stat(struct page *page, | |
176 | enum mem_cgroup_page_stat_item idx) | |
177 | { | |
178 | mem_cgroup_update_page_stat(page, idx, 1); | |
179 | } | |
180 | ||
181 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
182 | enum mem_cgroup_page_stat_item idx) | |
183 | { | |
184 | mem_cgroup_update_page_stat(page, idx, -1); | |
185 | } | |
186 | ||
4e416953 | 187 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
0ae5e89c YH |
188 | gfp_t gfp_mask, |
189 | unsigned long *total_scanned); | |
c0ff4b85 | 190 | u64 mem_cgroup_get_limit(struct mem_cgroup *memcg); |
a63d83f4 | 191 | |
456f998e | 192 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx); |
ca3e0214 | 193 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 194 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
195 | #endif |
196 | ||
f212ad7c DN |
197 | #ifdef CONFIG_DEBUG_VM |
198 | bool mem_cgroup_bad_page_check(struct page *page); | |
199 | void mem_cgroup_print_bad_page(struct page *page); | |
200 | #endif | |
52d4b9ac | 201 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
7a81b88c KH |
202 | struct mem_cgroup; |
203 | ||
204 | static inline int mem_cgroup_newpage_charge(struct page *page, | |
8289546e | 205 | struct mm_struct *mm, gfp_t gfp_mask) |
8a9f3ccd BS |
206 | { |
207 | return 0; | |
208 | } | |
209 | ||
8289546e HD |
210 | static inline int mem_cgroup_cache_charge(struct page *page, |
211 | struct mm_struct *mm, gfp_t gfp_mask) | |
8a9f3ccd | 212 | { |
8289546e | 213 | return 0; |
8a9f3ccd BS |
214 | } |
215 | ||
8c7c6e34 | 216 | static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
72835c86 | 217 | struct page *page, gfp_t gfp_mask, struct mem_cgroup **memcgp) |
7a81b88c KH |
218 | { |
219 | return 0; | |
220 | } | |
221 | ||
222 | static inline void mem_cgroup_commit_charge_swapin(struct page *page, | |
72835c86 | 223 | struct mem_cgroup *memcg) |
7a81b88c KH |
224 | { |
225 | } | |
226 | ||
72835c86 | 227 | static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg) |
7a81b88c KH |
228 | { |
229 | } | |
230 | ||
569b846d KH |
231 | static inline void mem_cgroup_uncharge_start(void) |
232 | { | |
233 | } | |
234 | ||
235 | static inline void mem_cgroup_uncharge_end(void) | |
236 | { | |
237 | } | |
238 | ||
8a9f3ccd BS |
239 | static inline void mem_cgroup_uncharge_page(struct page *page) |
240 | { | |
241 | } | |
242 | ||
69029cd5 KH |
243 | static inline void mem_cgroup_uncharge_cache_page(struct page *page) |
244 | { | |
245 | } | |
246 | ||
925b7673 JW |
247 | static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone, |
248 | struct mem_cgroup *memcg) | |
08e552c6 | 249 | { |
925b7673 | 250 | return &zone->lruvec; |
08e552c6 KH |
251 | } |
252 | ||
925b7673 JW |
253 | static inline struct lruvec *mem_cgroup_lru_add_list(struct zone *zone, |
254 | struct page *page, | |
255 | enum lru_list lru) | |
3f58a829 | 256 | { |
925b7673 | 257 | return &zone->lruvec; |
3f58a829 MK |
258 | } |
259 | ||
925b7673 | 260 | static inline void mem_cgroup_lru_del_list(struct page *page, enum lru_list lru) |
08e552c6 | 261 | { |
08e552c6 KH |
262 | } |
263 | ||
925b7673 JW |
264 | static inline struct lruvec *mem_cgroup_lru_move_lists(struct zone *zone, |
265 | struct page *page, | |
266 | enum lru_list from, | |
267 | enum lru_list to) | |
66e1707b | 268 | { |
925b7673 | 269 | return &zone->lruvec; |
66e1707b BS |
270 | } |
271 | ||
e42d9d5d WF |
272 | static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page) |
273 | { | |
274 | return NULL; | |
275 | } | |
276 | ||
a433658c KM |
277 | static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm) |
278 | { | |
279 | return NULL; | |
280 | } | |
281 | ||
c0ff4b85 R |
282 | static inline int mm_match_cgroup(struct mm_struct *mm, |
283 | struct mem_cgroup *memcg) | |
bed7161a | 284 | { |
60c12b12 | 285 | return 1; |
bed7161a BS |
286 | } |
287 | ||
4c4a2214 | 288 | static inline int task_in_mem_cgroup(struct task_struct *task, |
c0ff4b85 | 289 | const struct mem_cgroup *memcg) |
4c4a2214 DR |
290 | { |
291 | return 1; | |
292 | } | |
293 | ||
c0ff4b85 R |
294 | static inline struct cgroup_subsys_state |
295 | *mem_cgroup_css(struct mem_cgroup *memcg) | |
d324236b WF |
296 | { |
297 | return NULL; | |
298 | } | |
299 | ||
e8589cc1 | 300 | static inline int |
ac39cf8c | 301 | mem_cgroup_prepare_migration(struct page *page, struct page *newpage, |
72835c86 | 302 | struct mem_cgroup **memcgp, gfp_t gfp_mask) |
ae41be37 KH |
303 | { |
304 | return 0; | |
305 | } | |
306 | ||
c0ff4b85 | 307 | static inline void mem_cgroup_end_migration(struct mem_cgroup *memcg, |
50de1dd9 | 308 | struct page *oldpage, struct page *newpage, bool migration_ok) |
ae41be37 KH |
309 | { |
310 | } | |
311 | ||
5660048c JW |
312 | static inline struct mem_cgroup * |
313 | mem_cgroup_iter(struct mem_cgroup *root, | |
314 | struct mem_cgroup *prev, | |
315 | struct mem_cgroup_reclaim_cookie *reclaim) | |
316 | { | |
317 | return NULL; | |
318 | } | |
319 | ||
320 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
321 | struct mem_cgroup *prev) | |
322 | { | |
323 | } | |
324 | ||
f8d66542 HT |
325 | static inline bool mem_cgroup_disabled(void) |
326 | { | |
327 | return true; | |
328 | } | |
a636b327 | 329 | |
14797e23 | 330 | static inline int |
c56d5c7d | 331 | mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) |
14797e23 KM |
332 | { |
333 | return 1; | |
334 | } | |
335 | ||
56e49d21 | 336 | static inline int |
c56d5c7d | 337 | mem_cgroup_inactive_file_is_low(struct lruvec *lruvec) |
56e49d21 RR |
338 | { |
339 | return 1; | |
340 | } | |
341 | ||
a3d8e054 | 342 | static inline unsigned long |
074291fe | 343 | mem_cgroup_get_lruvec_size(struct lruvec *lruvec, enum lru_list lru) |
a3d8e054 KM |
344 | { |
345 | return 0; | |
346 | } | |
347 | ||
3e2f41f1 KM |
348 | static inline struct zone_reclaim_stat* |
349 | mem_cgroup_get_reclaim_stat_from_page(struct page *page) | |
350 | { | |
351 | return NULL; | |
352 | } | |
353 | ||
e222432b BS |
354 | static inline void |
355 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
356 | { | |
357 | } | |
358 | ||
89c06bd5 KH |
359 | static inline void mem_cgroup_begin_update_page_stat(struct page *page, |
360 | bool *locked, unsigned long *flags) | |
361 | { | |
362 | } | |
363 | ||
364 | static inline void mem_cgroup_end_update_page_stat(struct page *page, | |
365 | bool *locked, unsigned long *flags) | |
366 | { | |
367 | } | |
368 | ||
2a7106f2 GT |
369 | static inline void mem_cgroup_inc_page_stat(struct page *page, |
370 | enum mem_cgroup_page_stat_item idx) | |
371 | { | |
372 | } | |
373 | ||
374 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
375 | enum mem_cgroup_page_stat_item idx) | |
d69b042f BS |
376 | { |
377 | } | |
378 | ||
4e416953 BS |
379 | static inline |
380 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, | |
0ae5e89c YH |
381 | gfp_t gfp_mask, |
382 | unsigned long *total_scanned) | |
4e416953 BS |
383 | { |
384 | return 0; | |
385 | } | |
386 | ||
a63d83f4 | 387 | static inline |
c0ff4b85 | 388 | u64 mem_cgroup_get_limit(struct mem_cgroup *memcg) |
a63d83f4 DR |
389 | { |
390 | return 0; | |
391 | } | |
392 | ||
e94c8a9c | 393 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
394 | { |
395 | } | |
396 | ||
456f998e YH |
397 | static inline |
398 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) | |
399 | { | |
400 | } | |
ab936cbc KH |
401 | static inline void mem_cgroup_replace_page_cache(struct page *oldpage, |
402 | struct page *newpage) | |
403 | { | |
404 | } | |
31a79235 | 405 | #endif /* CONFIG_CGROUP_MEM_RES_CTLR */ |
78fb7466 | 406 | |
f212ad7c DN |
407 | #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM) |
408 | static inline bool | |
409 | mem_cgroup_bad_page_check(struct page *page) | |
410 | { | |
411 | return false; | |
412 | } | |
413 | ||
414 | static inline void | |
415 | mem_cgroup_print_bad_page(struct page *page) | |
416 | { | |
417 | } | |
418 | #endif | |
419 | ||
e1aab161 GC |
420 | enum { |
421 | UNDER_LIMIT, | |
422 | SOFT_LIMIT, | |
423 | OVER_LIMIT, | |
424 | }; | |
425 | ||
426 | struct sock; | |
427 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM | |
428 | void sock_update_memcg(struct sock *sk); | |
429 | void sock_release_memcg(struct sock *sk); | |
430 | #else | |
431 | static inline void sock_update_memcg(struct sock *sk) | |
432 | { | |
433 | } | |
434 | static inline void sock_release_memcg(struct sock *sk) | |
435 | { | |
436 | } | |
437 | #endif /* CONFIG_CGROUP_MEM_RES_CTLR_KMEM */ | |
8cdea7c0 BS |
438 | #endif /* _LINUX_MEMCONTROL_H */ |
439 |