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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 | ||
8b25c6d2 JW |
35 | extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, |
36 | struct list_head *dst, | |
37 | unsigned long *scanned, int order, | |
38 | int mode, struct zone *z, | |
39 | struct mem_cgroup *mem_cont, | |
40 | int active, int file); | |
41 | ||
00f0b825 | 42 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR |
2c26fdd7 KH |
43 | /* |
44 | * All "charge" functions with gfp_mask should use GFP_KERNEL or | |
45 | * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't | |
46 | * alloc memory but reclaims memory from all available zones. So, "where I want | |
47 | * memory from" bits of gfp_mask has no meaning. So any bits of that field is | |
48 | * available but adding a rule is better. charge functions' gfp_mask should | |
49 | * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous | |
50 | * codes. | |
51 | * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.) | |
52 | */ | |
78fb7466 | 53 | |
7a81b88c | 54 | extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm, |
e1a1cd59 | 55 | gfp_t gfp_mask); |
7a81b88c | 56 | /* for swap handling */ |
8c7c6e34 KH |
57 | extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
58 | struct page *page, gfp_t mask, struct mem_cgroup **ptr); | |
7a81b88c KH |
59 | extern void mem_cgroup_commit_charge_swapin(struct page *page, |
60 | struct mem_cgroup *ptr); | |
61 | extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr); | |
62 | ||
8289546e HD |
63 | extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, |
64 | gfp_t gfp_mask); | |
08e552c6 KH |
65 | extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru); |
66 | extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru); | |
3f58a829 | 67 | extern void mem_cgroup_rotate_reclaimable_page(struct page *page); |
08e552c6 KH |
68 | extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru); |
69 | extern void mem_cgroup_del_lru(struct page *page); | |
70 | extern void mem_cgroup_move_lists(struct page *page, | |
71 | enum lru_list from, enum lru_list to); | |
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); |
ae3abae6 | 79 | extern int mem_cgroup_shmem_charge_fallback(struct page *page, |
b5a84319 | 80 | struct mm_struct *mm, gfp_t gfp_mask); |
c9b0ed51 | 81 | |
c7ba5c9e | 82 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask); |
4c4a2214 | 83 | int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem); |
3062fc67 | 84 | |
e42d9d5d | 85 | extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page); |
cf475ad2 BS |
86 | extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
87 | ||
2e4d4091 LJ |
88 | static inline |
89 | int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup) | |
90 | { | |
91 | struct mem_cgroup *mem; | |
92 | rcu_read_lock(); | |
e638c139 | 93 | mem = mem_cgroup_from_task(rcu_dereference((mm)->owner)); |
2e4d4091 LJ |
94 | rcu_read_unlock(); |
95 | return cgroup == mem; | |
96 | } | |
8a9f3ccd | 97 | |
d324236b WF |
98 | extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem); |
99 | ||
e8589cc1 | 100 | extern int |
ac39cf8c | 101 | mem_cgroup_prepare_migration(struct page *page, |
ef6a3c63 | 102 | struct page *newpage, struct mem_cgroup **ptr, gfp_t gfp_mask); |
01b1ae63 | 103 | extern void mem_cgroup_end_migration(struct mem_cgroup *mem, |
50de1dd9 | 104 | struct page *oldpage, struct page *newpage, bool migration_ok); |
ae41be37 | 105 | |
58ae83db KH |
106 | /* |
107 | * For memory reclaim. | |
108 | */ | |
c772be93 | 109 | int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg); |
56e49d21 | 110 | int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg); |
889976db | 111 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
1bac180b YH |
112 | unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, |
113 | struct zone *zone, | |
114 | enum lru_list lru); | |
3e2f41f1 KM |
115 | struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, |
116 | struct zone *zone); | |
117 | struct zone_reclaim_stat* | |
118 | mem_cgroup_get_reclaim_stat_from_page(struct page *page); | |
e222432b BS |
119 | extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
120 | struct task_struct *p); | |
58ae83db | 121 | |
c077719b KH |
122 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP |
123 | extern int do_swap_account; | |
124 | #endif | |
f8d66542 HT |
125 | |
126 | static inline bool mem_cgroup_disabled(void) | |
127 | { | |
128 | if (mem_cgroup_subsys.disabled) | |
129 | return true; | |
130 | return false; | |
131 | } | |
132 | ||
2a7106f2 GT |
133 | void mem_cgroup_update_page_stat(struct page *page, |
134 | enum mem_cgroup_page_stat_item idx, | |
135 | int val); | |
136 | ||
137 | static inline void mem_cgroup_inc_page_stat(struct page *page, | |
138 | enum mem_cgroup_page_stat_item idx) | |
139 | { | |
140 | mem_cgroup_update_page_stat(page, idx, 1); | |
141 | } | |
142 | ||
143 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
144 | enum mem_cgroup_page_stat_item idx) | |
145 | { | |
146 | mem_cgroup_update_page_stat(page, idx, -1); | |
147 | } | |
148 | ||
4e416953 | 149 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
0ae5e89c YH |
150 | gfp_t gfp_mask, |
151 | unsigned long *total_scanned); | |
a63d83f4 DR |
152 | u64 mem_cgroup_get_limit(struct mem_cgroup *mem); |
153 | ||
456f998e | 154 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx); |
ca3e0214 KH |
155 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
156 | void mem_cgroup_split_huge_fixup(struct page *head, struct page *tail); | |
157 | #endif | |
158 | ||
f212ad7c DN |
159 | #ifdef CONFIG_DEBUG_VM |
160 | bool mem_cgroup_bad_page_check(struct page *page); | |
161 | void mem_cgroup_print_bad_page(struct page *page); | |
162 | #endif | |
52d4b9ac | 163 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
7a81b88c KH |
164 | struct mem_cgroup; |
165 | ||
166 | static inline int mem_cgroup_newpage_charge(struct page *page, | |
8289546e | 167 | struct mm_struct *mm, gfp_t gfp_mask) |
8a9f3ccd BS |
168 | { |
169 | return 0; | |
170 | } | |
171 | ||
8289546e HD |
172 | static inline int mem_cgroup_cache_charge(struct page *page, |
173 | struct mm_struct *mm, gfp_t gfp_mask) | |
8a9f3ccd | 174 | { |
8289546e | 175 | return 0; |
8a9f3ccd BS |
176 | } |
177 | ||
8c7c6e34 KH |
178 | static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
179 | struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr) | |
7a81b88c KH |
180 | { |
181 | return 0; | |
182 | } | |
183 | ||
184 | static inline void mem_cgroup_commit_charge_swapin(struct page *page, | |
185 | struct mem_cgroup *ptr) | |
186 | { | |
187 | } | |
188 | ||
189 | static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr) | |
190 | { | |
191 | } | |
192 | ||
569b846d KH |
193 | static inline void mem_cgroup_uncharge_start(void) |
194 | { | |
195 | } | |
196 | ||
197 | static inline void mem_cgroup_uncharge_end(void) | |
198 | { | |
199 | } | |
200 | ||
8a9f3ccd BS |
201 | static inline void mem_cgroup_uncharge_page(struct page *page) |
202 | { | |
203 | } | |
204 | ||
69029cd5 KH |
205 | static inline void mem_cgroup_uncharge_cache_page(struct page *page) |
206 | { | |
207 | } | |
208 | ||
ae3abae6 | 209 | static inline int mem_cgroup_shmem_charge_fallback(struct page *page, |
b5a84319 | 210 | struct mm_struct *mm, gfp_t gfp_mask) |
c9b0ed51 KH |
211 | { |
212 | return 0; | |
213 | } | |
214 | ||
08e552c6 KH |
215 | static inline void mem_cgroup_add_lru_list(struct page *page, int lru) |
216 | { | |
217 | } | |
218 | ||
219 | static inline void mem_cgroup_del_lru_list(struct page *page, int lru) | |
220 | { | |
221 | return ; | |
222 | } | |
223 | ||
67954fe9 | 224 | static inline void mem_cgroup_rotate_reclaimable_page(struct page *page) |
3f58a829 MK |
225 | { |
226 | return ; | |
227 | } | |
228 | ||
08e552c6 KH |
229 | static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru) |
230 | { | |
231 | return ; | |
232 | } | |
233 | ||
234 | static inline void mem_cgroup_del_lru(struct page *page) | |
235 | { | |
236 | return ; | |
237 | } | |
238 | ||
239 | static inline void | |
240 | mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to) | |
66e1707b BS |
241 | { |
242 | } | |
243 | ||
e42d9d5d WF |
244 | static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page) |
245 | { | |
246 | return NULL; | |
247 | } | |
248 | ||
bd845e38 | 249 | static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem) |
bed7161a | 250 | { |
60c12b12 | 251 | return 1; |
bed7161a BS |
252 | } |
253 | ||
4c4a2214 DR |
254 | static inline int task_in_mem_cgroup(struct task_struct *task, |
255 | const struct mem_cgroup *mem) | |
256 | { | |
257 | return 1; | |
258 | } | |
259 | ||
d324236b WF |
260 | static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem) |
261 | { | |
262 | return NULL; | |
263 | } | |
264 | ||
e8589cc1 | 265 | static inline int |
ac39cf8c | 266 | mem_cgroup_prepare_migration(struct page *page, struct page *newpage, |
ef6a3c63 | 267 | struct mem_cgroup **ptr, gfp_t gfp_mask) |
ae41be37 KH |
268 | { |
269 | return 0; | |
270 | } | |
271 | ||
01b1ae63 | 272 | static inline void mem_cgroup_end_migration(struct mem_cgroup *mem, |
50de1dd9 | 273 | struct page *oldpage, struct page *newpage, bool migration_ok) |
ae41be37 KH |
274 | { |
275 | } | |
276 | ||
6c48a1d0 KH |
277 | static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) |
278 | { | |
279 | return 0; | |
280 | } | |
281 | ||
282 | static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, | |
283 | int priority) | |
284 | { | |
285 | } | |
286 | ||
287 | static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, | |
288 | int priority) | |
289 | { | |
290 | } | |
291 | ||
f8d66542 HT |
292 | static inline bool mem_cgroup_disabled(void) |
293 | { | |
294 | return true; | |
295 | } | |
a636b327 | 296 | |
14797e23 | 297 | static inline int |
c772be93 | 298 | mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg) |
14797e23 KM |
299 | { |
300 | return 1; | |
301 | } | |
302 | ||
56e49d21 RR |
303 | static inline int |
304 | mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg) | |
305 | { | |
306 | return 1; | |
307 | } | |
308 | ||
a3d8e054 | 309 | static inline unsigned long |
1bac180b YH |
310 | mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, struct zone *zone, |
311 | enum lru_list lru) | |
a3d8e054 KM |
312 | { |
313 | return 0; | |
314 | } | |
315 | ||
316 | ||
3e2f41f1 KM |
317 | static inline struct zone_reclaim_stat* |
318 | mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone) | |
319 | { | |
320 | return NULL; | |
321 | } | |
322 | ||
323 | static inline struct zone_reclaim_stat* | |
324 | mem_cgroup_get_reclaim_stat_from_page(struct page *page) | |
325 | { | |
326 | return NULL; | |
327 | } | |
328 | ||
e222432b BS |
329 | static inline void |
330 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
331 | { | |
332 | } | |
333 | ||
2a7106f2 GT |
334 | static inline void mem_cgroup_inc_page_stat(struct page *page, |
335 | enum mem_cgroup_page_stat_item idx) | |
336 | { | |
337 | } | |
338 | ||
339 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
340 | enum mem_cgroup_page_stat_item idx) | |
d69b042f BS |
341 | { |
342 | } | |
343 | ||
4e416953 BS |
344 | static inline |
345 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, | |
0ae5e89c YH |
346 | gfp_t gfp_mask, |
347 | unsigned long *total_scanned) | |
4e416953 BS |
348 | { |
349 | return 0; | |
350 | } | |
351 | ||
a63d83f4 DR |
352 | static inline |
353 | u64 mem_cgroup_get_limit(struct mem_cgroup *mem) | |
354 | { | |
355 | return 0; | |
356 | } | |
357 | ||
ca3e0214 KH |
358 | static inline void mem_cgroup_split_huge_fixup(struct page *head, |
359 | struct page *tail) | |
360 | { | |
361 | } | |
362 | ||
456f998e YH |
363 | static inline |
364 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) | |
365 | { | |
366 | } | |
78fb7466 PE |
367 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
368 | ||
f212ad7c DN |
369 | #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM) |
370 | static inline bool | |
371 | mem_cgroup_bad_page_check(struct page *page) | |
372 | { | |
373 | return false; | |
374 | } | |
375 | ||
376 | static inline void | |
377 | mem_cgroup_print_bad_page(struct page *page) | |
378 | { | |
379 | } | |
380 | #endif | |
381 | ||
8cdea7c0 BS |
382 | #endif /* _LINUX_MEMCONTROL_H */ |
383 |