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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> |
78fb7466 PE |
23 | struct mem_cgroup; |
24 | struct page_cgroup; | |
8697d331 BS |
25 | struct page; |
26 | struct mm_struct; | |
78fb7466 | 27 | |
2a7106f2 GT |
28 | /* Stats that can be updated by kernel. */ |
29 | enum mem_cgroup_page_stat_item { | |
30 | MEMCG_NR_FILE_MAPPED, /* # of pages charged as file rss */ | |
31 | }; | |
32 | ||
8b25c6d2 JW |
33 | extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, |
34 | struct list_head *dst, | |
35 | unsigned long *scanned, int order, | |
36 | int mode, struct zone *z, | |
37 | struct mem_cgroup *mem_cont, | |
38 | int active, int file); | |
39 | ||
00f0b825 | 40 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR |
2c26fdd7 KH |
41 | /* |
42 | * All "charge" functions with gfp_mask should use GFP_KERNEL or | |
43 | * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't | |
44 | * alloc memory but reclaims memory from all available zones. So, "where I want | |
45 | * memory from" bits of gfp_mask has no meaning. So any bits of that field is | |
46 | * available but adding a rule is better. charge functions' gfp_mask should | |
47 | * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous | |
48 | * codes. | |
49 | * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.) | |
50 | */ | |
78fb7466 | 51 | |
7a81b88c | 52 | extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm, |
e1a1cd59 | 53 | gfp_t gfp_mask); |
7a81b88c | 54 | /* for swap handling */ |
8c7c6e34 KH |
55 | extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
56 | struct page *page, gfp_t mask, struct mem_cgroup **ptr); | |
7a81b88c KH |
57 | extern void mem_cgroup_commit_charge_swapin(struct page *page, |
58 | struct mem_cgroup *ptr); | |
59 | extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr); | |
60 | ||
8289546e HD |
61 | extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, |
62 | gfp_t gfp_mask); | |
08e552c6 KH |
63 | extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru); |
64 | extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru); | |
65 | extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru); | |
66 | extern void mem_cgroup_del_lru(struct page *page); | |
67 | extern void mem_cgroup_move_lists(struct page *page, | |
68 | enum lru_list from, enum lru_list to); | |
569b846d KH |
69 | |
70 | /* For coalescing uncharge for reducing memcg' overhead*/ | |
71 | extern void mem_cgroup_uncharge_start(void); | |
72 | extern void mem_cgroup_uncharge_end(void); | |
73 | ||
3c541e14 | 74 | extern void mem_cgroup_uncharge_page(struct page *page); |
69029cd5 | 75 | extern void mem_cgroup_uncharge_cache_page(struct page *page); |
ae3abae6 | 76 | extern int mem_cgroup_shmem_charge_fallback(struct page *page, |
b5a84319 | 77 | struct mm_struct *mm, gfp_t gfp_mask); |
c9b0ed51 | 78 | |
c7ba5c9e | 79 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask); |
4c4a2214 | 80 | int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem); |
3062fc67 | 81 | |
e42d9d5d | 82 | extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page); |
cf475ad2 BS |
83 | extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
84 | ||
2e4d4091 LJ |
85 | static inline |
86 | int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup) | |
87 | { | |
88 | struct mem_cgroup *mem; | |
89 | rcu_read_lock(); | |
e638c139 | 90 | mem = mem_cgroup_from_task(rcu_dereference((mm)->owner)); |
2e4d4091 LJ |
91 | rcu_read_unlock(); |
92 | return cgroup == mem; | |
93 | } | |
8a9f3ccd | 94 | |
d324236b WF |
95 | extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem); |
96 | ||
e8589cc1 | 97 | extern int |
ac39cf8c AM |
98 | mem_cgroup_prepare_migration(struct page *page, |
99 | struct page *newpage, struct mem_cgroup **ptr); | |
01b1ae63 | 100 | extern void mem_cgroup_end_migration(struct mem_cgroup *mem, |
50de1dd9 | 101 | struct page *oldpage, struct page *newpage, bool migration_ok); |
ae41be37 | 102 | |
58ae83db KH |
103 | /* |
104 | * For memory reclaim. | |
105 | */ | |
c772be93 | 106 | int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg); |
56e49d21 | 107 | int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg); |
a3d8e054 KM |
108 | unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, |
109 | struct zone *zone, | |
110 | enum lru_list lru); | |
3e2f41f1 KM |
111 | struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, |
112 | struct zone *zone); | |
113 | struct zone_reclaim_stat* | |
114 | mem_cgroup_get_reclaim_stat_from_page(struct page *page); | |
e222432b BS |
115 | extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
116 | struct task_struct *p); | |
58ae83db | 117 | |
c077719b KH |
118 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP |
119 | extern int do_swap_account; | |
120 | #endif | |
f8d66542 HT |
121 | |
122 | static inline bool mem_cgroup_disabled(void) | |
123 | { | |
124 | if (mem_cgroup_subsys.disabled) | |
125 | return true; | |
126 | return false; | |
127 | } | |
128 | ||
2a7106f2 GT |
129 | void mem_cgroup_update_page_stat(struct page *page, |
130 | enum mem_cgroup_page_stat_item idx, | |
131 | int val); | |
132 | ||
133 | static inline void mem_cgroup_inc_page_stat(struct page *page, | |
134 | enum mem_cgroup_page_stat_item idx) | |
135 | { | |
136 | mem_cgroup_update_page_stat(page, idx, 1); | |
137 | } | |
138 | ||
139 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
140 | enum mem_cgroup_page_stat_item idx) | |
141 | { | |
142 | mem_cgroup_update_page_stat(page, idx, -1); | |
143 | } | |
144 | ||
4e416953 | 145 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
00918b6a | 146 | gfp_t gfp_mask); |
a63d83f4 DR |
147 | u64 mem_cgroup_get_limit(struct mem_cgroup *mem); |
148 | ||
ca3e0214 KH |
149 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
150 | void mem_cgroup_split_huge_fixup(struct page *head, struct page *tail); | |
151 | #endif | |
152 | ||
52d4b9ac | 153 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
7a81b88c KH |
154 | struct mem_cgroup; |
155 | ||
156 | static inline int mem_cgroup_newpage_charge(struct page *page, | |
8289546e | 157 | struct mm_struct *mm, gfp_t gfp_mask) |
8a9f3ccd BS |
158 | { |
159 | return 0; | |
160 | } | |
161 | ||
8289546e HD |
162 | static inline int mem_cgroup_cache_charge(struct page *page, |
163 | struct mm_struct *mm, gfp_t gfp_mask) | |
8a9f3ccd | 164 | { |
8289546e | 165 | return 0; |
8a9f3ccd BS |
166 | } |
167 | ||
8c7c6e34 KH |
168 | static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
169 | struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr) | |
7a81b88c KH |
170 | { |
171 | return 0; | |
172 | } | |
173 | ||
174 | static inline void mem_cgroup_commit_charge_swapin(struct page *page, | |
175 | struct mem_cgroup *ptr) | |
176 | { | |
177 | } | |
178 | ||
179 | static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr) | |
180 | { | |
181 | } | |
182 | ||
569b846d KH |
183 | static inline void mem_cgroup_uncharge_start(void) |
184 | { | |
185 | } | |
186 | ||
187 | static inline void mem_cgroup_uncharge_end(void) | |
188 | { | |
189 | } | |
190 | ||
8a9f3ccd BS |
191 | static inline void mem_cgroup_uncharge_page(struct page *page) |
192 | { | |
193 | } | |
194 | ||
69029cd5 KH |
195 | static inline void mem_cgroup_uncharge_cache_page(struct page *page) |
196 | { | |
197 | } | |
198 | ||
ae3abae6 | 199 | static inline int mem_cgroup_shmem_charge_fallback(struct page *page, |
b5a84319 | 200 | struct mm_struct *mm, gfp_t gfp_mask) |
c9b0ed51 KH |
201 | { |
202 | return 0; | |
203 | } | |
204 | ||
08e552c6 KH |
205 | static inline void mem_cgroup_add_lru_list(struct page *page, int lru) |
206 | { | |
207 | } | |
208 | ||
209 | static inline void mem_cgroup_del_lru_list(struct page *page, int lru) | |
210 | { | |
211 | return ; | |
212 | } | |
213 | ||
214 | static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru) | |
215 | { | |
216 | return ; | |
217 | } | |
218 | ||
219 | static inline void mem_cgroup_del_lru(struct page *page) | |
220 | { | |
221 | return ; | |
222 | } | |
223 | ||
224 | static inline void | |
225 | mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to) | |
66e1707b BS |
226 | { |
227 | } | |
228 | ||
e42d9d5d WF |
229 | static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page) |
230 | { | |
231 | return NULL; | |
232 | } | |
233 | ||
bd845e38 | 234 | static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem) |
bed7161a | 235 | { |
60c12b12 | 236 | return 1; |
bed7161a BS |
237 | } |
238 | ||
4c4a2214 DR |
239 | static inline int task_in_mem_cgroup(struct task_struct *task, |
240 | const struct mem_cgroup *mem) | |
241 | { | |
242 | return 1; | |
243 | } | |
244 | ||
d324236b WF |
245 | static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem) |
246 | { | |
247 | return NULL; | |
248 | } | |
249 | ||
e8589cc1 | 250 | static inline int |
ac39cf8c AM |
251 | mem_cgroup_prepare_migration(struct page *page, struct page *newpage, |
252 | struct mem_cgroup **ptr) | |
ae41be37 KH |
253 | { |
254 | return 0; | |
255 | } | |
256 | ||
01b1ae63 | 257 | static inline void mem_cgroup_end_migration(struct mem_cgroup *mem, |
50de1dd9 | 258 | struct page *oldpage, struct page *newpage, bool migration_ok) |
ae41be37 KH |
259 | { |
260 | } | |
261 | ||
6c48a1d0 KH |
262 | static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) |
263 | { | |
264 | return 0; | |
265 | } | |
266 | ||
267 | static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, | |
268 | int priority) | |
269 | { | |
270 | } | |
271 | ||
272 | static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, | |
273 | int priority) | |
274 | { | |
275 | } | |
276 | ||
f8d66542 HT |
277 | static inline bool mem_cgroup_disabled(void) |
278 | { | |
279 | return true; | |
280 | } | |
a636b327 | 281 | |
14797e23 | 282 | static inline int |
c772be93 | 283 | mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg) |
14797e23 KM |
284 | { |
285 | return 1; | |
286 | } | |
287 | ||
56e49d21 RR |
288 | static inline int |
289 | mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg) | |
290 | { | |
291 | return 1; | |
292 | } | |
293 | ||
a3d8e054 KM |
294 | static inline unsigned long |
295 | mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone, | |
296 | enum lru_list lru) | |
297 | { | |
298 | return 0; | |
299 | } | |
300 | ||
301 | ||
3e2f41f1 KM |
302 | static inline struct zone_reclaim_stat* |
303 | mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone) | |
304 | { | |
305 | return NULL; | |
306 | } | |
307 | ||
308 | static inline struct zone_reclaim_stat* | |
309 | mem_cgroup_get_reclaim_stat_from_page(struct page *page) | |
310 | { | |
311 | return NULL; | |
312 | } | |
313 | ||
e222432b BS |
314 | static inline void |
315 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
316 | { | |
317 | } | |
318 | ||
2a7106f2 GT |
319 | static inline void mem_cgroup_inc_page_stat(struct page *page, |
320 | enum mem_cgroup_page_stat_item idx) | |
321 | { | |
322 | } | |
323 | ||
324 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
325 | enum mem_cgroup_page_stat_item idx) | |
d69b042f BS |
326 | { |
327 | } | |
328 | ||
4e416953 BS |
329 | static inline |
330 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, | |
00918b6a | 331 | gfp_t gfp_mask) |
4e416953 BS |
332 | { |
333 | return 0; | |
334 | } | |
335 | ||
a63d83f4 DR |
336 | static inline |
337 | u64 mem_cgroup_get_limit(struct mem_cgroup *mem) | |
338 | { | |
339 | return 0; | |
340 | } | |
341 | ||
ca3e0214 KH |
342 | static inline void mem_cgroup_split_huge_fixup(struct page *head, |
343 | struct page *tail) | |
344 | { | |
345 | } | |
346 | ||
78fb7466 PE |
347 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
348 | ||
8cdea7c0 BS |
349 | #endif /* _LINUX_MEMCONTROL_H */ |
350 |