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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 | |
00f0b825 | 28 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR |
2c26fdd7 KH |
29 | /* |
30 | * All "charge" functions with gfp_mask should use GFP_KERNEL or | |
31 | * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't | |
32 | * alloc memory but reclaims memory from all available zones. So, "where I want | |
33 | * memory from" bits of gfp_mask has no meaning. So any bits of that field is | |
34 | * available but adding a rule is better. charge functions' gfp_mask should | |
35 | * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous | |
36 | * codes. | |
37 | * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.) | |
38 | */ | |
78fb7466 | 39 | |
7a81b88c | 40 | extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm, |
e1a1cd59 | 41 | gfp_t gfp_mask); |
7a81b88c | 42 | /* for swap handling */ |
8c7c6e34 KH |
43 | extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
44 | struct page *page, gfp_t mask, struct mem_cgroup **ptr); | |
7a81b88c KH |
45 | extern void mem_cgroup_commit_charge_swapin(struct page *page, |
46 | struct mem_cgroup *ptr); | |
47 | extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr); | |
48 | ||
8289546e HD |
49 | extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, |
50 | gfp_t gfp_mask); | |
08e552c6 KH |
51 | extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru); |
52 | extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru); | |
53 | extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru); | |
54 | extern void mem_cgroup_del_lru(struct page *page); | |
55 | extern void mem_cgroup_move_lists(struct page *page, | |
56 | enum lru_list from, enum lru_list to); | |
3c541e14 | 57 | extern void mem_cgroup_uncharge_page(struct page *page); |
69029cd5 | 58 | extern void mem_cgroup_uncharge_cache_page(struct page *page); |
b5a84319 KH |
59 | extern int mem_cgroup_shrink_usage(struct page *page, |
60 | struct mm_struct *mm, gfp_t gfp_mask); | |
c9b0ed51 | 61 | |
66e1707b BS |
62 | extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, |
63 | struct list_head *dst, | |
64 | unsigned long *scanned, int order, | |
65 | int mode, struct zone *z, | |
66 | struct mem_cgroup *mem_cont, | |
4f98a2fe | 67 | int active, int file); |
c7ba5c9e | 68 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask); |
4c4a2214 | 69 | int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem); |
3062fc67 | 70 | |
cf475ad2 BS |
71 | extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
72 | ||
2e4d4091 LJ |
73 | static inline |
74 | int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup) | |
75 | { | |
76 | struct mem_cgroup *mem; | |
77 | rcu_read_lock(); | |
78 | mem = mem_cgroup_from_task((mm)->owner); | |
79 | rcu_read_unlock(); | |
80 | return cgroup == mem; | |
81 | } | |
8a9f3ccd | 82 | |
e8589cc1 | 83 | extern int |
01b1ae63 KH |
84 | mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr); |
85 | extern void mem_cgroup_end_migration(struct mem_cgroup *mem, | |
86 | struct page *oldpage, struct page *newpage); | |
ae41be37 | 87 | |
58ae83db KH |
88 | /* |
89 | * For memory reclaim. | |
90 | */ | |
91 | extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem); | |
5932f367 KH |
92 | extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem); |
93 | ||
6c48a1d0 KH |
94 | extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem); |
95 | extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, | |
96 | int priority); | |
97 | extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, | |
98 | int priority); | |
c772be93 | 99 | int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg); |
a3d8e054 KM |
100 | unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, |
101 | struct zone *zone, | |
102 | enum lru_list lru); | |
3e2f41f1 KM |
103 | struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, |
104 | struct zone *zone); | |
105 | struct zone_reclaim_stat* | |
106 | mem_cgroup_get_reclaim_stat_from_page(struct page *page); | |
58ae83db | 107 | |
c077719b KH |
108 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP |
109 | extern int do_swap_account; | |
110 | #endif | |
f8d66542 HT |
111 | |
112 | static inline bool mem_cgroup_disabled(void) | |
113 | { | |
114 | if (mem_cgroup_subsys.disabled) | |
115 | return true; | |
116 | return false; | |
117 | } | |
118 | ||
a636b327 KH |
119 | extern bool mem_cgroup_oom_called(struct task_struct *task); |
120 | ||
52d4b9ac | 121 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
7a81b88c KH |
122 | struct mem_cgroup; |
123 | ||
124 | static inline int mem_cgroup_newpage_charge(struct page *page, | |
8289546e | 125 | struct mm_struct *mm, gfp_t gfp_mask) |
8a9f3ccd BS |
126 | { |
127 | return 0; | |
128 | } | |
129 | ||
8289546e HD |
130 | static inline int mem_cgroup_cache_charge(struct page *page, |
131 | struct mm_struct *mm, gfp_t gfp_mask) | |
8a9f3ccd | 132 | { |
8289546e | 133 | return 0; |
8a9f3ccd BS |
134 | } |
135 | ||
8c7c6e34 KH |
136 | static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
137 | struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr) | |
7a81b88c KH |
138 | { |
139 | return 0; | |
140 | } | |
141 | ||
142 | static inline void mem_cgroup_commit_charge_swapin(struct page *page, | |
143 | struct mem_cgroup *ptr) | |
144 | { | |
145 | } | |
146 | ||
147 | static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr) | |
148 | { | |
149 | } | |
150 | ||
8a9f3ccd BS |
151 | static inline void mem_cgroup_uncharge_page(struct page *page) |
152 | { | |
153 | } | |
154 | ||
69029cd5 KH |
155 | static inline void mem_cgroup_uncharge_cache_page(struct page *page) |
156 | { | |
157 | } | |
158 | ||
b5a84319 KH |
159 | static inline int mem_cgroup_shrink_usage(struct page *page, |
160 | struct mm_struct *mm, gfp_t gfp_mask) | |
c9b0ed51 KH |
161 | { |
162 | return 0; | |
163 | } | |
164 | ||
08e552c6 KH |
165 | static inline void mem_cgroup_add_lru_list(struct page *page, int lru) |
166 | { | |
167 | } | |
168 | ||
169 | static inline void mem_cgroup_del_lru_list(struct page *page, int lru) | |
170 | { | |
171 | return ; | |
172 | } | |
173 | ||
174 | static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru) | |
175 | { | |
176 | return ; | |
177 | } | |
178 | ||
179 | static inline void mem_cgroup_del_lru(struct page *page) | |
180 | { | |
181 | return ; | |
182 | } | |
183 | ||
184 | static inline void | |
185 | mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to) | |
66e1707b BS |
186 | { |
187 | } | |
188 | ||
bd845e38 | 189 | static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem) |
bed7161a | 190 | { |
60c12b12 | 191 | return 1; |
bed7161a BS |
192 | } |
193 | ||
4c4a2214 DR |
194 | static inline int task_in_mem_cgroup(struct task_struct *task, |
195 | const struct mem_cgroup *mem) | |
196 | { | |
197 | return 1; | |
198 | } | |
199 | ||
e8589cc1 | 200 | static inline int |
01b1ae63 | 201 | mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr) |
ae41be37 KH |
202 | { |
203 | return 0; | |
204 | } | |
205 | ||
01b1ae63 KH |
206 | static inline void mem_cgroup_end_migration(struct mem_cgroup *mem, |
207 | struct page *oldpage, | |
208 | struct page *newpage) | |
ae41be37 KH |
209 | { |
210 | } | |
211 | ||
58ae83db KH |
212 | static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem) |
213 | { | |
214 | return 0; | |
215 | } | |
5932f367 KH |
216 | |
217 | static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem) | |
218 | { | |
219 | return 0; | |
220 | } | |
221 | ||
6c48a1d0 KH |
222 | static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) |
223 | { | |
224 | return 0; | |
225 | } | |
226 | ||
227 | static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, | |
228 | int priority) | |
229 | { | |
230 | } | |
231 | ||
232 | static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, | |
233 | int priority) | |
234 | { | |
235 | } | |
236 | ||
f8d66542 HT |
237 | static inline bool mem_cgroup_disabled(void) |
238 | { | |
239 | return true; | |
240 | } | |
a636b327 KH |
241 | |
242 | static inline bool mem_cgroup_oom_called(struct task_struct *task) | |
243 | { | |
244 | return false; | |
245 | } | |
14797e23 KM |
246 | |
247 | static inline int | |
c772be93 | 248 | mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg) |
14797e23 KM |
249 | { |
250 | return 1; | |
251 | } | |
252 | ||
a3d8e054 KM |
253 | static inline unsigned long |
254 | mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone, | |
255 | enum lru_list lru) | |
256 | { | |
257 | return 0; | |
258 | } | |
259 | ||
260 | ||
3e2f41f1 KM |
261 | static inline struct zone_reclaim_stat* |
262 | mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone) | |
263 | { | |
264 | return NULL; | |
265 | } | |
266 | ||
267 | static inline struct zone_reclaim_stat* | |
268 | mem_cgroup_get_reclaim_stat_from_page(struct page *page) | |
269 | { | |
270 | return NULL; | |
271 | } | |
272 | ||
78fb7466 PE |
273 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
274 | ||
8cdea7c0 BS |
275 | #endif /* _LINUX_MEMCONTROL_H */ |
276 |