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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 | |
8b25c6d2 JW |
28 | extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, |
29 | struct list_head *dst, | |
30 | unsigned long *scanned, int order, | |
31 | int mode, struct zone *z, | |
32 | struct mem_cgroup *mem_cont, | |
33 | int active, int file); | |
34 | ||
00f0b825 | 35 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR |
2c26fdd7 KH |
36 | /* |
37 | * All "charge" functions with gfp_mask should use GFP_KERNEL or | |
38 | * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't | |
39 | * alloc memory but reclaims memory from all available zones. So, "where I want | |
40 | * memory from" bits of gfp_mask has no meaning. So any bits of that field is | |
41 | * available but adding a rule is better. charge functions' gfp_mask should | |
42 | * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous | |
43 | * codes. | |
44 | * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.) | |
45 | */ | |
78fb7466 | 46 | |
7a81b88c | 47 | extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm, |
e1a1cd59 | 48 | gfp_t gfp_mask); |
7a81b88c | 49 | /* for swap handling */ |
8c7c6e34 KH |
50 | extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
51 | struct page *page, gfp_t mask, struct mem_cgroup **ptr); | |
7a81b88c KH |
52 | extern void mem_cgroup_commit_charge_swapin(struct page *page, |
53 | struct mem_cgroup *ptr); | |
54 | extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr); | |
55 | ||
8289546e HD |
56 | extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, |
57 | gfp_t gfp_mask); | |
08e552c6 KH |
58 | extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru); |
59 | extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru); | |
60 | extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru); | |
61 | extern void mem_cgroup_del_lru(struct page *page); | |
62 | extern void mem_cgroup_move_lists(struct page *page, | |
63 | enum lru_list from, enum lru_list to); | |
569b846d KH |
64 | |
65 | /* For coalescing uncharge for reducing memcg' overhead*/ | |
66 | extern void mem_cgroup_uncharge_start(void); | |
67 | extern void mem_cgroup_uncharge_end(void); | |
68 | ||
3c541e14 | 69 | extern void mem_cgroup_uncharge_page(struct page *page); |
69029cd5 | 70 | extern void mem_cgroup_uncharge_cache_page(struct page *page); |
ae3abae6 | 71 | extern int mem_cgroup_shmem_charge_fallback(struct page *page, |
b5a84319 | 72 | struct mm_struct *mm, gfp_t gfp_mask); |
c9b0ed51 | 73 | |
c7ba5c9e | 74 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask); |
4c4a2214 | 75 | int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem); |
3062fc67 | 76 | |
e42d9d5d | 77 | extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page); |
cf475ad2 BS |
78 | extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
79 | ||
2e4d4091 LJ |
80 | static inline |
81 | int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup) | |
82 | { | |
83 | struct mem_cgroup *mem; | |
84 | rcu_read_lock(); | |
e638c139 | 85 | mem = mem_cgroup_from_task(rcu_dereference((mm)->owner)); |
2e4d4091 LJ |
86 | rcu_read_unlock(); |
87 | return cgroup == mem; | |
88 | } | |
8a9f3ccd | 89 | |
d324236b WF |
90 | extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem); |
91 | ||
e8589cc1 | 92 | extern int |
ac39cf8c | 93 | mem_cgroup_prepare_migration(struct page *page, |
94 | struct page *newpage, struct mem_cgroup **ptr); | |
01b1ae63 KH |
95 | extern void mem_cgroup_end_migration(struct mem_cgroup *mem, |
96 | struct page *oldpage, struct page *newpage); | |
ae41be37 | 97 | |
58ae83db KH |
98 | /* |
99 | * For memory reclaim. | |
100 | */ | |
6c48a1d0 KH |
101 | extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem); |
102 | extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, | |
103 | int priority); | |
104 | extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, | |
105 | int priority); | |
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 | ||
d8046582 | 129 | void mem_cgroup_update_file_mapped(struct page *page, int val); |
4e416953 BS |
130 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
131 | gfp_t gfp_mask, int nid, | |
132 | int zid); | |
52d4b9ac | 133 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
7a81b88c KH |
134 | struct mem_cgroup; |
135 | ||
136 | static inline int mem_cgroup_newpage_charge(struct page *page, | |
8289546e | 137 | struct mm_struct *mm, gfp_t gfp_mask) |
8a9f3ccd BS |
138 | { |
139 | return 0; | |
140 | } | |
141 | ||
8289546e HD |
142 | static inline int mem_cgroup_cache_charge(struct page *page, |
143 | struct mm_struct *mm, gfp_t gfp_mask) | |
8a9f3ccd | 144 | { |
8289546e | 145 | return 0; |
8a9f3ccd BS |
146 | } |
147 | ||
8c7c6e34 KH |
148 | static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
149 | struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr) | |
7a81b88c KH |
150 | { |
151 | return 0; | |
152 | } | |
153 | ||
154 | static inline void mem_cgroup_commit_charge_swapin(struct page *page, | |
155 | struct mem_cgroup *ptr) | |
156 | { | |
157 | } | |
158 | ||
159 | static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr) | |
160 | { | |
161 | } | |
162 | ||
569b846d KH |
163 | static inline void mem_cgroup_uncharge_start(void) |
164 | { | |
165 | } | |
166 | ||
167 | static inline void mem_cgroup_uncharge_end(void) | |
168 | { | |
169 | } | |
170 | ||
8a9f3ccd BS |
171 | static inline void mem_cgroup_uncharge_page(struct page *page) |
172 | { | |
173 | } | |
174 | ||
69029cd5 KH |
175 | static inline void mem_cgroup_uncharge_cache_page(struct page *page) |
176 | { | |
177 | } | |
178 | ||
ae3abae6 | 179 | static inline int mem_cgroup_shmem_charge_fallback(struct page *page, |
b5a84319 | 180 | struct mm_struct *mm, gfp_t gfp_mask) |
c9b0ed51 KH |
181 | { |
182 | return 0; | |
183 | } | |
184 | ||
08e552c6 KH |
185 | static inline void mem_cgroup_add_lru_list(struct page *page, int lru) |
186 | { | |
187 | } | |
188 | ||
189 | static inline void mem_cgroup_del_lru_list(struct page *page, int lru) | |
190 | { | |
191 | return ; | |
192 | } | |
193 | ||
194 | static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru) | |
195 | { | |
196 | return ; | |
197 | } | |
198 | ||
199 | static inline void mem_cgroup_del_lru(struct page *page) | |
200 | { | |
201 | return ; | |
202 | } | |
203 | ||
204 | static inline void | |
205 | mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to) | |
66e1707b BS |
206 | { |
207 | } | |
208 | ||
e42d9d5d WF |
209 | static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page) |
210 | { | |
211 | return NULL; | |
212 | } | |
213 | ||
bd845e38 | 214 | static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem) |
bed7161a | 215 | { |
60c12b12 | 216 | return 1; |
bed7161a BS |
217 | } |
218 | ||
4c4a2214 DR |
219 | static inline int task_in_mem_cgroup(struct task_struct *task, |
220 | const struct mem_cgroup *mem) | |
221 | { | |
222 | return 1; | |
223 | } | |
224 | ||
d324236b WF |
225 | static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem) |
226 | { | |
227 | return NULL; | |
228 | } | |
229 | ||
e8589cc1 | 230 | static inline int |
ac39cf8c | 231 | mem_cgroup_prepare_migration(struct page *page, struct page *newpage, |
232 | struct mem_cgroup **ptr) | |
ae41be37 KH |
233 | { |
234 | return 0; | |
235 | } | |
236 | ||
01b1ae63 KH |
237 | static inline void mem_cgroup_end_migration(struct mem_cgroup *mem, |
238 | struct page *oldpage, | |
239 | struct page *newpage) | |
ae41be37 KH |
240 | { |
241 | } | |
242 | ||
6c48a1d0 KH |
243 | static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) |
244 | { | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, | |
249 | int priority) | |
250 | { | |
251 | } | |
252 | ||
253 | static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, | |
254 | int priority) | |
255 | { | |
256 | } | |
257 | ||
f8d66542 HT |
258 | static inline bool mem_cgroup_disabled(void) |
259 | { | |
260 | return true; | |
261 | } | |
a636b327 | 262 | |
14797e23 | 263 | static inline int |
c772be93 | 264 | mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg) |
14797e23 KM |
265 | { |
266 | return 1; | |
267 | } | |
268 | ||
56e49d21 RR |
269 | static inline int |
270 | mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg) | |
271 | { | |
272 | return 1; | |
273 | } | |
274 | ||
a3d8e054 KM |
275 | static inline unsigned long |
276 | mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone, | |
277 | enum lru_list lru) | |
278 | { | |
279 | return 0; | |
280 | } | |
281 | ||
282 | ||
3e2f41f1 KM |
283 | static inline struct zone_reclaim_stat* |
284 | mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone) | |
285 | { | |
286 | return NULL; | |
287 | } | |
288 | ||
289 | static inline struct zone_reclaim_stat* | |
290 | mem_cgroup_get_reclaim_stat_from_page(struct page *page) | |
291 | { | |
292 | return NULL; | |
293 | } | |
294 | ||
e222432b BS |
295 | static inline void |
296 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
297 | { | |
298 | } | |
299 | ||
d8046582 | 300 | static inline void mem_cgroup_update_file_mapped(struct page *page, |
d69b042f BS |
301 | int val) |
302 | { | |
303 | } | |
304 | ||
4e416953 BS |
305 | static inline |
306 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, | |
307 | gfp_t gfp_mask, int nid, int zid) | |
308 | { | |
309 | return 0; | |
310 | } | |
311 | ||
78fb7466 PE |
312 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
313 | ||
8cdea7c0 BS |
314 | #endif /* _LINUX_MEMCONTROL_H */ |
315 |