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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 | ||
c255a458 | 41 | #ifdef CONFIG_MEMCG |
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 *); | |
fa9add64 | 66 | struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *); |
569b846d KH |
67 | |
68 | /* For coalescing uncharge for reducing memcg' overhead*/ | |
69 | extern void mem_cgroup_uncharge_start(void); | |
70 | extern void mem_cgroup_uncharge_end(void); | |
71 | ||
3c541e14 | 72 | extern void mem_cgroup_uncharge_page(struct page *page); |
69029cd5 | 73 | extern void mem_cgroup_uncharge_cache_page(struct page *page); |
c9b0ed51 | 74 | |
c3ac9a8a JW |
75 | bool __mem_cgroup_same_or_subtree(const struct mem_cgroup *root_memcg, |
76 | struct mem_cgroup *memcg); | |
c0ff4b85 | 77 | int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *memcg); |
3062fc67 | 78 | |
e42d9d5d | 79 | extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page); |
cf475ad2 | 80 | extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
a433658c | 81 | extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm); |
cf475ad2 | 82 | |
e1aab161 | 83 | extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg); |
d1a4c0b3 | 84 | extern struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont); |
e1aab161 | 85 | |
2e4d4091 | 86 | static inline |
587af308 | 87 | bool mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *memcg) |
2e4d4091 | 88 | { |
587af308 JW |
89 | struct mem_cgroup *task_memcg; |
90 | bool match; | |
c3ac9a8a | 91 | |
2e4d4091 | 92 | rcu_read_lock(); |
587af308 JW |
93 | task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner)); |
94 | match = __mem_cgroup_same_or_subtree(memcg, task_memcg); | |
2e4d4091 | 95 | rcu_read_unlock(); |
c3ac9a8a | 96 | return match; |
2e4d4091 | 97 | } |
8a9f3ccd | 98 | |
c0ff4b85 | 99 | extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg); |
d324236b | 100 | |
0030f535 JW |
101 | extern void |
102 | mem_cgroup_prepare_migration(struct page *page, struct page *newpage, | |
103 | struct mem_cgroup **memcgp); | |
c0ff4b85 | 104 | extern void mem_cgroup_end_migration(struct mem_cgroup *memcg, |
50de1dd9 | 105 | struct page *oldpage, struct page *newpage, bool migration_ok); |
ae41be37 | 106 | |
5660048c JW |
107 | struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *, |
108 | struct mem_cgroup *, | |
109 | struct mem_cgroup_reclaim_cookie *); | |
110 | void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *); | |
111 | ||
58ae83db KH |
112 | /* |
113 | * For memory reclaim. | |
114 | */ | |
c56d5c7d KK |
115 | int mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec); |
116 | int mem_cgroup_inactive_file_is_low(struct lruvec *lruvec); | |
889976db | 117 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
4d7dcca2 | 118 | unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list); |
fa9add64 | 119 | void mem_cgroup_update_lru_size(struct lruvec *, enum lru_list, int); |
e222432b BS |
120 | extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
121 | struct task_struct *p); | |
ab936cbc KH |
122 | extern void mem_cgroup_replace_page_cache(struct page *oldpage, |
123 | struct page *newpage); | |
58ae83db | 124 | |
c255a458 | 125 | #ifdef CONFIG_MEMCG_SWAP |
c077719b KH |
126 | extern int do_swap_account; |
127 | #endif | |
f8d66542 HT |
128 | |
129 | static inline bool mem_cgroup_disabled(void) | |
130 | { | |
131 | if (mem_cgroup_subsys.disabled) | |
132 | return true; | |
133 | return false; | |
134 | } | |
135 | ||
89c06bd5 KH |
136 | void __mem_cgroup_begin_update_page_stat(struct page *page, bool *locked, |
137 | unsigned long *flags); | |
138 | ||
4331f7d3 KH |
139 | extern atomic_t memcg_moving; |
140 | ||
89c06bd5 KH |
141 | static inline void mem_cgroup_begin_update_page_stat(struct page *page, |
142 | bool *locked, unsigned long *flags) | |
143 | { | |
144 | if (mem_cgroup_disabled()) | |
145 | return; | |
146 | rcu_read_lock(); | |
147 | *locked = false; | |
4331f7d3 KH |
148 | if (atomic_read(&memcg_moving)) |
149 | __mem_cgroup_begin_update_page_stat(page, locked, flags); | |
89c06bd5 KH |
150 | } |
151 | ||
152 | void __mem_cgroup_end_update_page_stat(struct page *page, | |
153 | unsigned long *flags); | |
154 | static inline void mem_cgroup_end_update_page_stat(struct page *page, | |
155 | bool *locked, unsigned long *flags) | |
156 | { | |
157 | if (mem_cgroup_disabled()) | |
158 | return; | |
159 | if (*locked) | |
160 | __mem_cgroup_end_update_page_stat(page, flags); | |
161 | rcu_read_unlock(); | |
162 | } | |
163 | ||
2a7106f2 GT |
164 | void mem_cgroup_update_page_stat(struct page *page, |
165 | enum mem_cgroup_page_stat_item idx, | |
166 | int val); | |
167 | ||
168 | static inline void mem_cgroup_inc_page_stat(struct page *page, | |
169 | enum mem_cgroup_page_stat_item idx) | |
170 | { | |
171 | mem_cgroup_update_page_stat(page, idx, 1); | |
172 | } | |
173 | ||
174 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
175 | enum mem_cgroup_page_stat_item idx) | |
176 | { | |
177 | mem_cgroup_update_page_stat(page, idx, -1); | |
178 | } | |
179 | ||
4e416953 | 180 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
0ae5e89c YH |
181 | gfp_t gfp_mask, |
182 | unsigned long *total_scanned); | |
a63d83f4 | 183 | |
68ae564b DR |
184 | void __mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx); |
185 | static inline void mem_cgroup_count_vm_event(struct mm_struct *mm, | |
186 | enum vm_event_item idx) | |
187 | { | |
188 | if (mem_cgroup_disabled()) | |
189 | return; | |
190 | __mem_cgroup_count_vm_event(mm, idx); | |
191 | } | |
ca3e0214 | 192 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
e94c8a9c | 193 | void mem_cgroup_split_huge_fixup(struct page *head); |
ca3e0214 KH |
194 | #endif |
195 | ||
f212ad7c DN |
196 | #ifdef CONFIG_DEBUG_VM |
197 | bool mem_cgroup_bad_page_check(struct page *page); | |
198 | void mem_cgroup_print_bad_page(struct page *page); | |
199 | #endif | |
c255a458 | 200 | #else /* CONFIG_MEMCG */ |
7a81b88c KH |
201 | struct mem_cgroup; |
202 | ||
203 | static inline int mem_cgroup_newpage_charge(struct page *page, | |
8289546e | 204 | struct mm_struct *mm, gfp_t gfp_mask) |
8a9f3ccd BS |
205 | { |
206 | return 0; | |
207 | } | |
208 | ||
8289546e HD |
209 | static inline int mem_cgroup_cache_charge(struct page *page, |
210 | struct mm_struct *mm, gfp_t gfp_mask) | |
8a9f3ccd | 211 | { |
8289546e | 212 | return 0; |
8a9f3ccd BS |
213 | } |
214 | ||
8c7c6e34 | 215 | static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
72835c86 | 216 | struct page *page, gfp_t gfp_mask, struct mem_cgroup **memcgp) |
7a81b88c KH |
217 | { |
218 | return 0; | |
219 | } | |
220 | ||
221 | static inline void mem_cgroup_commit_charge_swapin(struct page *page, | |
72835c86 | 222 | struct mem_cgroup *memcg) |
7a81b88c KH |
223 | { |
224 | } | |
225 | ||
72835c86 | 226 | static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg) |
7a81b88c KH |
227 | { |
228 | } | |
229 | ||
569b846d KH |
230 | static inline void mem_cgroup_uncharge_start(void) |
231 | { | |
232 | } | |
233 | ||
234 | static inline void mem_cgroup_uncharge_end(void) | |
235 | { | |
236 | } | |
237 | ||
8a9f3ccd BS |
238 | static inline void mem_cgroup_uncharge_page(struct page *page) |
239 | { | |
240 | } | |
241 | ||
69029cd5 KH |
242 | static inline void mem_cgroup_uncharge_cache_page(struct page *page) |
243 | { | |
244 | } | |
245 | ||
925b7673 JW |
246 | static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone, |
247 | struct mem_cgroup *memcg) | |
08e552c6 | 248 | { |
925b7673 | 249 | return &zone->lruvec; |
08e552c6 KH |
250 | } |
251 | ||
fa9add64 HD |
252 | static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page, |
253 | struct zone *zone) | |
66e1707b | 254 | { |
925b7673 | 255 | return &zone->lruvec; |
66e1707b BS |
256 | } |
257 | ||
e42d9d5d WF |
258 | static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page) |
259 | { | |
260 | return NULL; | |
261 | } | |
262 | ||
a433658c KM |
263 | static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm) |
264 | { | |
265 | return NULL; | |
266 | } | |
267 | ||
587af308 | 268 | static inline bool mm_match_cgroup(struct mm_struct *mm, |
c0ff4b85 | 269 | struct mem_cgroup *memcg) |
bed7161a | 270 | { |
587af308 | 271 | return true; |
bed7161a BS |
272 | } |
273 | ||
4c4a2214 | 274 | static inline int task_in_mem_cgroup(struct task_struct *task, |
c0ff4b85 | 275 | const struct mem_cgroup *memcg) |
4c4a2214 DR |
276 | { |
277 | return 1; | |
278 | } | |
279 | ||
c0ff4b85 R |
280 | static inline struct cgroup_subsys_state |
281 | *mem_cgroup_css(struct mem_cgroup *memcg) | |
d324236b WF |
282 | { |
283 | return NULL; | |
284 | } | |
285 | ||
0030f535 | 286 | static inline void |
ac39cf8c | 287 | mem_cgroup_prepare_migration(struct page *page, struct page *newpage, |
0030f535 | 288 | struct mem_cgroup **memcgp) |
ae41be37 | 289 | { |
ae41be37 KH |
290 | } |
291 | ||
c0ff4b85 | 292 | static inline void mem_cgroup_end_migration(struct mem_cgroup *memcg, |
50de1dd9 | 293 | struct page *oldpage, struct page *newpage, bool migration_ok) |
ae41be37 KH |
294 | { |
295 | } | |
296 | ||
5660048c JW |
297 | static inline struct mem_cgroup * |
298 | mem_cgroup_iter(struct mem_cgroup *root, | |
299 | struct mem_cgroup *prev, | |
300 | struct mem_cgroup_reclaim_cookie *reclaim) | |
301 | { | |
302 | return NULL; | |
303 | } | |
304 | ||
305 | static inline void mem_cgroup_iter_break(struct mem_cgroup *root, | |
306 | struct mem_cgroup *prev) | |
307 | { | |
308 | } | |
309 | ||
f8d66542 HT |
310 | static inline bool mem_cgroup_disabled(void) |
311 | { | |
312 | return true; | |
313 | } | |
a636b327 | 314 | |
14797e23 | 315 | static inline int |
c56d5c7d | 316 | mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec) |
14797e23 KM |
317 | { |
318 | return 1; | |
319 | } | |
320 | ||
56e49d21 | 321 | static inline int |
c56d5c7d | 322 | mem_cgroup_inactive_file_is_low(struct lruvec *lruvec) |
56e49d21 RR |
323 | { |
324 | return 1; | |
325 | } | |
326 | ||
a3d8e054 | 327 | static inline unsigned long |
4d7dcca2 | 328 | mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru) |
a3d8e054 KM |
329 | { |
330 | return 0; | |
331 | } | |
332 | ||
fa9add64 HD |
333 | static inline void |
334 | mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru, | |
335 | int increment) | |
3e2f41f1 | 336 | { |
3e2f41f1 KM |
337 | } |
338 | ||
e222432b BS |
339 | static inline void |
340 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
341 | { | |
342 | } | |
343 | ||
89c06bd5 KH |
344 | static inline void mem_cgroup_begin_update_page_stat(struct page *page, |
345 | bool *locked, unsigned long *flags) | |
346 | { | |
347 | } | |
348 | ||
349 | static inline void mem_cgroup_end_update_page_stat(struct page *page, | |
350 | bool *locked, unsigned long *flags) | |
351 | { | |
352 | } | |
353 | ||
2a7106f2 GT |
354 | static inline void mem_cgroup_inc_page_stat(struct page *page, |
355 | enum mem_cgroup_page_stat_item idx) | |
356 | { | |
357 | } | |
358 | ||
359 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
360 | enum mem_cgroup_page_stat_item idx) | |
d69b042f BS |
361 | { |
362 | } | |
363 | ||
4e416953 BS |
364 | static inline |
365 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, | |
0ae5e89c YH |
366 | gfp_t gfp_mask, |
367 | unsigned long *total_scanned) | |
4e416953 BS |
368 | { |
369 | return 0; | |
370 | } | |
371 | ||
e94c8a9c | 372 | static inline void mem_cgroup_split_huge_fixup(struct page *head) |
ca3e0214 KH |
373 | { |
374 | } | |
375 | ||
456f998e YH |
376 | static inline |
377 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) | |
378 | { | |
379 | } | |
ab936cbc KH |
380 | static inline void mem_cgroup_replace_page_cache(struct page *oldpage, |
381 | struct page *newpage) | |
382 | { | |
383 | } | |
c255a458 | 384 | #endif /* CONFIG_MEMCG */ |
78fb7466 | 385 | |
c255a458 | 386 | #if !defined(CONFIG_MEMCG) || !defined(CONFIG_DEBUG_VM) |
f212ad7c DN |
387 | static inline bool |
388 | mem_cgroup_bad_page_check(struct page *page) | |
389 | { | |
390 | return false; | |
391 | } | |
392 | ||
393 | static inline void | |
394 | mem_cgroup_print_bad_page(struct page *page) | |
395 | { | |
396 | } | |
397 | #endif | |
398 | ||
e1aab161 GC |
399 | enum { |
400 | UNDER_LIMIT, | |
401 | SOFT_LIMIT, | |
402 | OVER_LIMIT, | |
403 | }; | |
404 | ||
405 | struct sock; | |
cd59085a | 406 | #if defined(CONFIG_INET) && defined(CONFIG_MEMCG_KMEM) |
e1aab161 GC |
407 | void sock_update_memcg(struct sock *sk); |
408 | void sock_release_memcg(struct sock *sk); | |
409 | #else | |
410 | static inline void sock_update_memcg(struct sock *sk) | |
411 | { | |
412 | } | |
413 | static inline void sock_release_memcg(struct sock *sk) | |
414 | { | |
415 | } | |
cd59085a | 416 | #endif /* CONFIG_INET && CONFIG_MEMCG_KMEM */ |
8cdea7c0 BS |
417 | #endif /* _LINUX_MEMCONTROL_H */ |
418 |