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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 | */ | |
6c48a1d0 KH |
91 | extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem); |
92 | extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, | |
93 | int priority); | |
94 | extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, | |
95 | int priority); | |
c772be93 | 96 | int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg); |
a3d8e054 KM |
97 | unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, |
98 | struct zone *zone, | |
99 | enum lru_list lru); | |
3e2f41f1 KM |
100 | struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, |
101 | struct zone *zone); | |
102 | struct zone_reclaim_stat* | |
103 | mem_cgroup_get_reclaim_stat_from_page(struct page *page); | |
e222432b BS |
104 | extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
105 | struct task_struct *p); | |
58ae83db | 106 | |
c077719b KH |
107 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP |
108 | extern int do_swap_account; | |
109 | #endif | |
f8d66542 HT |
110 | |
111 | static inline bool mem_cgroup_disabled(void) | |
112 | { | |
113 | if (mem_cgroup_subsys.disabled) | |
114 | return true; | |
115 | return false; | |
116 | } | |
117 | ||
a636b327 KH |
118 | extern bool mem_cgroup_oom_called(struct task_struct *task); |
119 | ||
52d4b9ac | 120 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
7a81b88c KH |
121 | struct mem_cgroup; |
122 | ||
123 | static inline int mem_cgroup_newpage_charge(struct page *page, | |
8289546e | 124 | struct mm_struct *mm, gfp_t gfp_mask) |
8a9f3ccd BS |
125 | { |
126 | return 0; | |
127 | } | |
128 | ||
8289546e HD |
129 | static inline int mem_cgroup_cache_charge(struct page *page, |
130 | struct mm_struct *mm, gfp_t gfp_mask) | |
8a9f3ccd | 131 | { |
8289546e | 132 | return 0; |
8a9f3ccd BS |
133 | } |
134 | ||
8c7c6e34 KH |
135 | static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
136 | struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr) | |
7a81b88c KH |
137 | { |
138 | return 0; | |
139 | } | |
140 | ||
141 | static inline void mem_cgroup_commit_charge_swapin(struct page *page, | |
142 | struct mem_cgroup *ptr) | |
143 | { | |
144 | } | |
145 | ||
146 | static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr) | |
147 | { | |
148 | } | |
149 | ||
8a9f3ccd BS |
150 | static inline void mem_cgroup_uncharge_page(struct page *page) |
151 | { | |
152 | } | |
153 | ||
69029cd5 KH |
154 | static inline void mem_cgroup_uncharge_cache_page(struct page *page) |
155 | { | |
156 | } | |
157 | ||
b5a84319 KH |
158 | static inline int mem_cgroup_shrink_usage(struct page *page, |
159 | struct mm_struct *mm, gfp_t gfp_mask) | |
c9b0ed51 KH |
160 | { |
161 | return 0; | |
162 | } | |
163 | ||
08e552c6 KH |
164 | static inline void mem_cgroup_add_lru_list(struct page *page, int lru) |
165 | { | |
166 | } | |
167 | ||
168 | static inline void mem_cgroup_del_lru_list(struct page *page, int lru) | |
169 | { | |
170 | return ; | |
171 | } | |
172 | ||
173 | static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru) | |
174 | { | |
175 | return ; | |
176 | } | |
177 | ||
178 | static inline void mem_cgroup_del_lru(struct page *page) | |
179 | { | |
180 | return ; | |
181 | } | |
182 | ||
183 | static inline void | |
184 | mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to) | |
66e1707b BS |
185 | { |
186 | } | |
187 | ||
bd845e38 | 188 | static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem) |
bed7161a | 189 | { |
60c12b12 | 190 | return 1; |
bed7161a BS |
191 | } |
192 | ||
4c4a2214 DR |
193 | static inline int task_in_mem_cgroup(struct task_struct *task, |
194 | const struct mem_cgroup *mem) | |
195 | { | |
196 | return 1; | |
197 | } | |
198 | ||
e8589cc1 | 199 | static inline int |
01b1ae63 | 200 | mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr) |
ae41be37 KH |
201 | { |
202 | return 0; | |
203 | } | |
204 | ||
01b1ae63 KH |
205 | static inline void mem_cgroup_end_migration(struct mem_cgroup *mem, |
206 | struct page *oldpage, | |
207 | struct page *newpage) | |
ae41be37 KH |
208 | { |
209 | } | |
210 | ||
6c48a1d0 KH |
211 | static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) |
212 | { | |
213 | return 0; | |
214 | } | |
215 | ||
216 | static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, | |
217 | int priority) | |
218 | { | |
219 | } | |
220 | ||
221 | static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, | |
222 | int priority) | |
223 | { | |
224 | } | |
225 | ||
f8d66542 HT |
226 | static inline bool mem_cgroup_disabled(void) |
227 | { | |
228 | return true; | |
229 | } | |
a636b327 KH |
230 | |
231 | static inline bool mem_cgroup_oom_called(struct task_struct *task) | |
232 | { | |
233 | return false; | |
234 | } | |
14797e23 KM |
235 | |
236 | static inline int | |
c772be93 | 237 | mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg) |
14797e23 KM |
238 | { |
239 | return 1; | |
240 | } | |
241 | ||
a3d8e054 KM |
242 | static inline unsigned long |
243 | mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone, | |
244 | enum lru_list lru) | |
245 | { | |
246 | return 0; | |
247 | } | |
248 | ||
249 | ||
3e2f41f1 KM |
250 | static inline struct zone_reclaim_stat* |
251 | mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone) | |
252 | { | |
253 | return NULL; | |
254 | } | |
255 | ||
256 | static inline struct zone_reclaim_stat* | |
257 | mem_cgroup_get_reclaim_stat_from_page(struct page *page) | |
258 | { | |
259 | return NULL; | |
260 | } | |
261 | ||
e222432b BS |
262 | static inline void |
263 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
264 | { | |
265 | } | |
266 | ||
78fb7466 PE |
267 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
268 | ||
8cdea7c0 BS |
269 | #endif /* _LINUX_MEMCONTROL_H */ |
270 |