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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 | */ | |
c772be93 | 101 | int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg); |
56e49d21 | 102 | int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg); |
a3d8e054 KM |
103 | unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, |
104 | struct zone *zone, | |
105 | enum lru_list lru); | |
3e2f41f1 KM |
106 | struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, |
107 | struct zone *zone); | |
108 | struct zone_reclaim_stat* | |
109 | mem_cgroup_get_reclaim_stat_from_page(struct page *page); | |
e222432b BS |
110 | extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
111 | struct task_struct *p); | |
58ae83db | 112 | |
c077719b KH |
113 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP |
114 | extern int do_swap_account; | |
115 | #endif | |
f8d66542 HT |
116 | |
117 | static inline bool mem_cgroup_disabled(void) | |
118 | { | |
119 | if (mem_cgroup_subsys.disabled) | |
120 | return true; | |
121 | return false; | |
122 | } | |
123 | ||
d8046582 | 124 | void mem_cgroup_update_file_mapped(struct page *page, int val); |
4e416953 BS |
125 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
126 | gfp_t gfp_mask, int nid, | |
127 | int zid); | |
52d4b9ac | 128 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
7a81b88c KH |
129 | struct mem_cgroup; |
130 | ||
131 | static inline int mem_cgroup_newpage_charge(struct page *page, | |
8289546e | 132 | struct mm_struct *mm, gfp_t gfp_mask) |
8a9f3ccd BS |
133 | { |
134 | return 0; | |
135 | } | |
136 | ||
8289546e HD |
137 | static inline int mem_cgroup_cache_charge(struct page *page, |
138 | struct mm_struct *mm, gfp_t gfp_mask) | |
8a9f3ccd | 139 | { |
8289546e | 140 | return 0; |
8a9f3ccd BS |
141 | } |
142 | ||
8c7c6e34 KH |
143 | static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
144 | struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr) | |
7a81b88c KH |
145 | { |
146 | return 0; | |
147 | } | |
148 | ||
149 | static inline void mem_cgroup_commit_charge_swapin(struct page *page, | |
150 | struct mem_cgroup *ptr) | |
151 | { | |
152 | } | |
153 | ||
154 | static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr) | |
155 | { | |
156 | } | |
157 | ||
569b846d KH |
158 | static inline void mem_cgroup_uncharge_start(void) |
159 | { | |
160 | } | |
161 | ||
162 | static inline void mem_cgroup_uncharge_end(void) | |
163 | { | |
164 | } | |
165 | ||
8a9f3ccd BS |
166 | static inline void mem_cgroup_uncharge_page(struct page *page) |
167 | { | |
168 | } | |
169 | ||
69029cd5 KH |
170 | static inline void mem_cgroup_uncharge_cache_page(struct page *page) |
171 | { | |
172 | } | |
173 | ||
ae3abae6 | 174 | static inline int mem_cgroup_shmem_charge_fallback(struct page *page, |
b5a84319 | 175 | struct mm_struct *mm, gfp_t gfp_mask) |
c9b0ed51 KH |
176 | { |
177 | return 0; | |
178 | } | |
179 | ||
08e552c6 KH |
180 | static inline void mem_cgroup_add_lru_list(struct page *page, int lru) |
181 | { | |
182 | } | |
183 | ||
184 | static inline void mem_cgroup_del_lru_list(struct page *page, int lru) | |
185 | { | |
186 | return ; | |
187 | } | |
188 | ||
189 | static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru) | |
190 | { | |
191 | return ; | |
192 | } | |
193 | ||
194 | static inline void mem_cgroup_del_lru(struct page *page) | |
195 | { | |
196 | return ; | |
197 | } | |
198 | ||
199 | static inline void | |
200 | mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to) | |
66e1707b BS |
201 | { |
202 | } | |
203 | ||
e42d9d5d WF |
204 | static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page) |
205 | { | |
206 | return NULL; | |
207 | } | |
208 | ||
bd845e38 | 209 | static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem) |
bed7161a | 210 | { |
60c12b12 | 211 | return 1; |
bed7161a BS |
212 | } |
213 | ||
4c4a2214 DR |
214 | static inline int task_in_mem_cgroup(struct task_struct *task, |
215 | const struct mem_cgroup *mem) | |
216 | { | |
217 | return 1; | |
218 | } | |
219 | ||
d324236b WF |
220 | static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem) |
221 | { | |
222 | return NULL; | |
223 | } | |
224 | ||
e8589cc1 | 225 | static inline int |
ac39cf8c | 226 | mem_cgroup_prepare_migration(struct page *page, struct page *newpage, |
227 | struct mem_cgroup **ptr) | |
ae41be37 KH |
228 | { |
229 | return 0; | |
230 | } | |
231 | ||
01b1ae63 KH |
232 | static inline void mem_cgroup_end_migration(struct mem_cgroup *mem, |
233 | struct page *oldpage, | |
234 | struct page *newpage) | |
ae41be37 KH |
235 | { |
236 | } | |
237 | ||
6c48a1d0 KH |
238 | static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) |
239 | { | |
240 | return 0; | |
241 | } | |
242 | ||
243 | static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, | |
244 | int priority) | |
245 | { | |
246 | } | |
247 | ||
248 | static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, | |
249 | int priority) | |
250 | { | |
251 | } | |
252 | ||
f8d66542 HT |
253 | static inline bool mem_cgroup_disabled(void) |
254 | { | |
255 | return true; | |
256 | } | |
a636b327 | 257 | |
14797e23 | 258 | static inline int |
c772be93 | 259 | mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg) |
14797e23 KM |
260 | { |
261 | return 1; | |
262 | } | |
263 | ||
56e49d21 RR |
264 | static inline int |
265 | mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg) | |
266 | { | |
267 | return 1; | |
268 | } | |
269 | ||
a3d8e054 KM |
270 | static inline unsigned long |
271 | mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone, | |
272 | enum lru_list lru) | |
273 | { | |
274 | return 0; | |
275 | } | |
276 | ||
277 | ||
3e2f41f1 KM |
278 | static inline struct zone_reclaim_stat* |
279 | mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone) | |
280 | { | |
281 | return NULL; | |
282 | } | |
283 | ||
284 | static inline struct zone_reclaim_stat* | |
285 | mem_cgroup_get_reclaim_stat_from_page(struct page *page) | |
286 | { | |
287 | return NULL; | |
288 | } | |
289 | ||
e222432b BS |
290 | static inline void |
291 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
292 | { | |
293 | } | |
294 | ||
d8046582 | 295 | static inline void mem_cgroup_update_file_mapped(struct page *page, |
d69b042f BS |
296 | int val) |
297 | { | |
298 | } | |
299 | ||
4e416953 BS |
300 | static inline |
301 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, | |
302 | gfp_t gfp_mask, int nid, int zid) | |
303 | { | |
304 | return 0; | |
305 | } | |
306 | ||
78fb7466 PE |
307 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
308 | ||
8cdea7c0 BS |
309 | #endif /* _LINUX_MEMCONTROL_H */ |
310 |