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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, | |
4356f21d MK |
38 | isolate_mode_t mode, |
39 | struct zone *z, | |
8b25c6d2 JW |
40 | struct mem_cgroup *mem_cont, |
41 | int active, int file); | |
42 | ||
00f0b825 | 43 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR |
2c26fdd7 KH |
44 | /* |
45 | * All "charge" functions with gfp_mask should use GFP_KERNEL or | |
46 | * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't | |
47 | * alloc memory but reclaims memory from all available zones. So, "where I want | |
48 | * memory from" bits of gfp_mask has no meaning. So any bits of that field is | |
49 | * available but adding a rule is better. charge functions' gfp_mask should | |
50 | * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous | |
51 | * codes. | |
52 | * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.) | |
53 | */ | |
78fb7466 | 54 | |
7a81b88c | 55 | extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm, |
e1a1cd59 | 56 | gfp_t gfp_mask); |
7a81b88c | 57 | /* for swap handling */ |
8c7c6e34 KH |
58 | extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
59 | struct page *page, gfp_t mask, struct mem_cgroup **ptr); | |
7a81b88c KH |
60 | extern void mem_cgroup_commit_charge_swapin(struct page *page, |
61 | struct mem_cgroup *ptr); | |
62 | extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr); | |
63 | ||
8289546e HD |
64 | extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, |
65 | gfp_t gfp_mask); | |
08e552c6 KH |
66 | extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru); |
67 | extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru); | |
3f58a829 | 68 | extern void mem_cgroup_rotate_reclaimable_page(struct page *page); |
08e552c6 KH |
69 | extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru); |
70 | extern void mem_cgroup_del_lru(struct page *page); | |
71 | extern void mem_cgroup_move_lists(struct page *page, | |
72 | enum lru_list from, enum lru_list to); | |
569b846d KH |
73 | |
74 | /* For coalescing uncharge for reducing memcg' overhead*/ | |
75 | extern void mem_cgroup_uncharge_start(void); | |
76 | extern void mem_cgroup_uncharge_end(void); | |
77 | ||
3c541e14 | 78 | extern void mem_cgroup_uncharge_page(struct page *page); |
69029cd5 | 79 | extern void mem_cgroup_uncharge_cache_page(struct page *page); |
c9b0ed51 | 80 | |
c0ff4b85 R |
81 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask); |
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 | |
2e4d4091 LJ |
88 | static inline |
89 | int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup) | |
90 | { | |
c0ff4b85 | 91 | struct mem_cgroup *memcg; |
2e4d4091 | 92 | rcu_read_lock(); |
c0ff4b85 | 93 | memcg = mem_cgroup_from_task(rcu_dereference((mm)->owner)); |
2e4d4091 | 94 | rcu_read_unlock(); |
c0ff4b85 | 95 | return cgroup == memcg; |
2e4d4091 | 96 | } |
8a9f3ccd | 97 | |
c0ff4b85 | 98 | extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg); |
d324236b | 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); |
c0ff4b85 | 103 | extern void mem_cgroup_end_migration(struct mem_cgroup *memcg, |
50de1dd9 | 104 | struct page *oldpage, struct page *newpage, bool migration_ok); |
ae41be37 | 105 | |
58ae83db KH |
106 | /* |
107 | * For memory reclaim. | |
108 | */ | |
9b272977 JW |
109 | int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, |
110 | struct zone *zone); | |
111 | int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg, | |
112 | struct zone *zone); | |
889976db | 113 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
1bac180b | 114 | unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, |
bb2a0de9 | 115 | int nid, int zid, unsigned int lrumask); |
3e2f41f1 KM |
116 | struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, |
117 | struct zone *zone); | |
118 | struct zone_reclaim_stat* | |
119 | mem_cgroup_get_reclaim_stat_from_page(struct page *page); | |
e222432b BS |
120 | extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
121 | struct task_struct *p); | |
58ae83db | 122 | |
c077719b KH |
123 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP |
124 | extern int do_swap_account; | |
125 | #endif | |
f8d66542 HT |
126 | |
127 | static inline bool mem_cgroup_disabled(void) | |
128 | { | |
129 | if (mem_cgroup_subsys.disabled) | |
130 | return true; | |
131 | return false; | |
132 | } | |
133 | ||
2a7106f2 GT |
134 | void mem_cgroup_update_page_stat(struct page *page, |
135 | enum mem_cgroup_page_stat_item idx, | |
136 | int val); | |
137 | ||
138 | static inline void mem_cgroup_inc_page_stat(struct page *page, | |
139 | enum mem_cgroup_page_stat_item idx) | |
140 | { | |
141 | mem_cgroup_update_page_stat(page, idx, 1); | |
142 | } | |
143 | ||
144 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
145 | enum mem_cgroup_page_stat_item idx) | |
146 | { | |
147 | mem_cgroup_update_page_stat(page, idx, -1); | |
148 | } | |
149 | ||
4e416953 | 150 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
0ae5e89c YH |
151 | gfp_t gfp_mask, |
152 | unsigned long *total_scanned); | |
c0ff4b85 | 153 | u64 mem_cgroup_get_limit(struct mem_cgroup *memcg); |
a63d83f4 | 154 | |
456f998e | 155 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx); |
ca3e0214 KH |
156 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
157 | void mem_cgroup_split_huge_fixup(struct page *head, struct page *tail); | |
158 | #endif | |
159 | ||
f212ad7c DN |
160 | #ifdef CONFIG_DEBUG_VM |
161 | bool mem_cgroup_bad_page_check(struct page *page); | |
162 | void mem_cgroup_print_bad_page(struct page *page); | |
163 | #endif | |
52d4b9ac | 164 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
7a81b88c KH |
165 | struct mem_cgroup; |
166 | ||
167 | static inline int mem_cgroup_newpage_charge(struct page *page, | |
8289546e | 168 | struct mm_struct *mm, gfp_t gfp_mask) |
8a9f3ccd BS |
169 | { |
170 | return 0; | |
171 | } | |
172 | ||
8289546e HD |
173 | static inline int mem_cgroup_cache_charge(struct page *page, |
174 | struct mm_struct *mm, gfp_t gfp_mask) | |
8a9f3ccd | 175 | { |
8289546e | 176 | return 0; |
8a9f3ccd BS |
177 | } |
178 | ||
8c7c6e34 KH |
179 | static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
180 | struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr) | |
7a81b88c KH |
181 | { |
182 | return 0; | |
183 | } | |
184 | ||
185 | static inline void mem_cgroup_commit_charge_swapin(struct page *page, | |
186 | struct mem_cgroup *ptr) | |
187 | { | |
188 | } | |
189 | ||
190 | static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr) | |
191 | { | |
192 | } | |
193 | ||
569b846d KH |
194 | static inline void mem_cgroup_uncharge_start(void) |
195 | { | |
196 | } | |
197 | ||
198 | static inline void mem_cgroup_uncharge_end(void) | |
199 | { | |
200 | } | |
201 | ||
8a9f3ccd BS |
202 | static inline void mem_cgroup_uncharge_page(struct page *page) |
203 | { | |
204 | } | |
205 | ||
69029cd5 KH |
206 | static inline void mem_cgroup_uncharge_cache_page(struct page *page) |
207 | { | |
208 | } | |
209 | ||
08e552c6 KH |
210 | static inline void mem_cgroup_add_lru_list(struct page *page, int lru) |
211 | { | |
212 | } | |
213 | ||
214 | static inline void mem_cgroup_del_lru_list(struct page *page, int lru) | |
215 | { | |
216 | return ; | |
217 | } | |
218 | ||
67954fe9 | 219 | static inline void mem_cgroup_rotate_reclaimable_page(struct page *page) |
3f58a829 MK |
220 | { |
221 | return ; | |
222 | } | |
223 | ||
08e552c6 KH |
224 | static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru) |
225 | { | |
226 | return ; | |
227 | } | |
228 | ||
229 | static inline void mem_cgroup_del_lru(struct page *page) | |
230 | { | |
231 | return ; | |
232 | } | |
233 | ||
234 | static inline void | |
235 | mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to) | |
66e1707b BS |
236 | { |
237 | } | |
238 | ||
e42d9d5d WF |
239 | static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page) |
240 | { | |
241 | return NULL; | |
242 | } | |
243 | ||
a433658c KM |
244 | static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm) |
245 | { | |
246 | return NULL; | |
247 | } | |
248 | ||
c0ff4b85 R |
249 | static inline int mm_match_cgroup(struct mm_struct *mm, |
250 | struct mem_cgroup *memcg) | |
bed7161a | 251 | { |
60c12b12 | 252 | return 1; |
bed7161a BS |
253 | } |
254 | ||
4c4a2214 | 255 | static inline int task_in_mem_cgroup(struct task_struct *task, |
c0ff4b85 | 256 | const struct mem_cgroup *memcg) |
4c4a2214 DR |
257 | { |
258 | return 1; | |
259 | } | |
260 | ||
c0ff4b85 R |
261 | static inline struct cgroup_subsys_state |
262 | *mem_cgroup_css(struct mem_cgroup *memcg) | |
d324236b WF |
263 | { |
264 | return NULL; | |
265 | } | |
266 | ||
e8589cc1 | 267 | static inline int |
ac39cf8c | 268 | mem_cgroup_prepare_migration(struct page *page, struct page *newpage, |
ef6a3c63 | 269 | struct mem_cgroup **ptr, gfp_t gfp_mask) |
ae41be37 KH |
270 | { |
271 | return 0; | |
272 | } | |
273 | ||
c0ff4b85 | 274 | static inline void mem_cgroup_end_migration(struct mem_cgroup *memcg, |
50de1dd9 | 275 | struct page *oldpage, struct page *newpage, bool migration_ok) |
ae41be37 KH |
276 | { |
277 | } | |
278 | ||
c0ff4b85 | 279 | static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *memcg) |
6c48a1d0 KH |
280 | { |
281 | return 0; | |
282 | } | |
283 | ||
c0ff4b85 | 284 | static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *memcg, |
6c48a1d0 KH |
285 | int priority) |
286 | { | |
287 | } | |
288 | ||
c0ff4b85 | 289 | static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *memcg, |
6c48a1d0 KH |
290 | int priority) |
291 | { | |
292 | } | |
293 | ||
f8d66542 HT |
294 | static inline bool mem_cgroup_disabled(void) |
295 | { | |
296 | return true; | |
297 | } | |
a636b327 | 298 | |
14797e23 | 299 | static inline int |
9b272977 | 300 | mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, struct zone *zone) |
14797e23 KM |
301 | { |
302 | return 1; | |
303 | } | |
304 | ||
56e49d21 | 305 | static inline int |
9b272977 | 306 | mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg, struct zone *zone) |
56e49d21 RR |
307 | { |
308 | return 1; | |
309 | } | |
310 | ||
a3d8e054 | 311 | static inline unsigned long |
bb2a0de9 KH |
312 | mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, int nid, int zid, |
313 | unsigned int lru_mask) | |
a3d8e054 KM |
314 | { |
315 | return 0; | |
316 | } | |
317 | ||
318 | ||
3e2f41f1 KM |
319 | static inline struct zone_reclaim_stat* |
320 | mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone) | |
321 | { | |
322 | return NULL; | |
323 | } | |
324 | ||
325 | static inline struct zone_reclaim_stat* | |
326 | mem_cgroup_get_reclaim_stat_from_page(struct page *page) | |
327 | { | |
328 | return NULL; | |
329 | } | |
330 | ||
e222432b BS |
331 | static inline void |
332 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
333 | { | |
334 | } | |
335 | ||
2a7106f2 GT |
336 | static inline void mem_cgroup_inc_page_stat(struct page *page, |
337 | enum mem_cgroup_page_stat_item idx) | |
338 | { | |
339 | } | |
340 | ||
341 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
342 | enum mem_cgroup_page_stat_item idx) | |
d69b042f BS |
343 | { |
344 | } | |
345 | ||
4e416953 BS |
346 | static inline |
347 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, | |
0ae5e89c YH |
348 | gfp_t gfp_mask, |
349 | unsigned long *total_scanned) | |
4e416953 BS |
350 | { |
351 | return 0; | |
352 | } | |
353 | ||
a63d83f4 | 354 | static inline |
c0ff4b85 | 355 | u64 mem_cgroup_get_limit(struct mem_cgroup *memcg) |
a63d83f4 DR |
356 | { |
357 | return 0; | |
358 | } | |
359 | ||
ca3e0214 KH |
360 | static inline void mem_cgroup_split_huge_fixup(struct page *head, |
361 | struct page *tail) | |
362 | { | |
363 | } | |
364 | ||
456f998e YH |
365 | static inline |
366 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) | |
367 | { | |
368 | } | |
78fb7466 PE |
369 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
370 | ||
f212ad7c DN |
371 | #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM) |
372 | static inline bool | |
373 | mem_cgroup_bad_page_check(struct page *page) | |
374 | { | |
375 | return false; | |
376 | } | |
377 | ||
378 | static inline void | |
379 | mem_cgroup_print_bad_page(struct page *page) | |
380 | { | |
381 | } | |
382 | #endif | |
383 | ||
8cdea7c0 BS |
384 | #endif /* _LINUX_MEMCONTROL_H */ |
385 |