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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> |
456f998e YH |
23 | #include <linux/vm_event_item.h> |
24 | ||
78fb7466 PE |
25 | struct mem_cgroup; |
26 | struct page_cgroup; | |
8697d331 BS |
27 | struct page; |
28 | struct mm_struct; | |
78fb7466 | 29 | |
2a7106f2 GT |
30 | /* Stats that can be updated by kernel. */ |
31 | enum mem_cgroup_page_stat_item { | |
32 | MEMCG_NR_FILE_MAPPED, /* # of pages charged as file rss */ | |
33 | }; | |
34 | ||
8b25c6d2 JW |
35 | extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, |
36 | struct list_head *dst, | |
37 | unsigned long *scanned, int order, | |
38 | int mode, struct zone *z, | |
39 | struct mem_cgroup *mem_cont, | |
40 | int active, int file); | |
41 | ||
00f0b825 | 42 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR |
2c26fdd7 KH |
43 | /* |
44 | * All "charge" functions with gfp_mask should use GFP_KERNEL or | |
45 | * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't | |
46 | * alloc memory but reclaims memory from all available zones. So, "where I want | |
47 | * memory from" bits of gfp_mask has no meaning. So any bits of that field is | |
48 | * available but adding a rule is better. charge functions' gfp_mask should | |
49 | * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous | |
50 | * codes. | |
51 | * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.) | |
52 | */ | |
78fb7466 | 53 | |
7a81b88c | 54 | extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm, |
e1a1cd59 | 55 | gfp_t gfp_mask); |
7a81b88c | 56 | /* for swap handling */ |
8c7c6e34 KH |
57 | extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
58 | struct page *page, gfp_t mask, struct mem_cgroup **ptr); | |
7a81b88c KH |
59 | extern void mem_cgroup_commit_charge_swapin(struct page *page, |
60 | struct mem_cgroup *ptr); | |
61 | extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr); | |
62 | ||
8289546e HD |
63 | extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, |
64 | gfp_t gfp_mask); | |
08e552c6 KH |
65 | extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru); |
66 | extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru); | |
3f58a829 | 67 | extern void mem_cgroup_rotate_reclaimable_page(struct page *page); |
08e552c6 KH |
68 | extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru); |
69 | extern void mem_cgroup_del_lru(struct page *page); | |
70 | extern void mem_cgroup_move_lists(struct page *page, | |
71 | enum lru_list from, enum lru_list to); | |
569b846d KH |
72 | |
73 | /* For coalescing uncharge for reducing memcg' overhead*/ | |
74 | extern void mem_cgroup_uncharge_start(void); | |
75 | extern void mem_cgroup_uncharge_end(void); | |
76 | ||
3c541e14 | 77 | extern void mem_cgroup_uncharge_page(struct page *page); |
69029cd5 | 78 | extern void mem_cgroup_uncharge_cache_page(struct page *page); |
c9b0ed51 | 79 | |
c7ba5c9e | 80 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask); |
4c4a2214 | 81 | int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem); |
3062fc67 | 82 | |
e42d9d5d | 83 | extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page); |
cf475ad2 | 84 | extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p); |
a433658c | 85 | extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm); |
cf475ad2 | 86 | |
2e4d4091 LJ |
87 | static inline |
88 | int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup) | |
89 | { | |
90 | struct mem_cgroup *mem; | |
91 | rcu_read_lock(); | |
e638c139 | 92 | mem = mem_cgroup_from_task(rcu_dereference((mm)->owner)); |
2e4d4091 LJ |
93 | rcu_read_unlock(); |
94 | return cgroup == mem; | |
95 | } | |
8a9f3ccd | 96 | |
d324236b WF |
97 | extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem); |
98 | ||
e8589cc1 | 99 | extern int |
ac39cf8c | 100 | mem_cgroup_prepare_migration(struct page *page, |
ef6a3c63 | 101 | struct page *newpage, struct mem_cgroup **ptr, gfp_t gfp_mask); |
01b1ae63 | 102 | extern void mem_cgroup_end_migration(struct mem_cgroup *mem, |
50de1dd9 | 103 | struct page *oldpage, struct page *newpage, bool migration_ok); |
ae41be37 | 104 | |
58ae83db KH |
105 | /* |
106 | * For memory reclaim. | |
107 | */ | |
c772be93 | 108 | int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg); |
56e49d21 | 109 | int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg); |
889976db | 110 | int mem_cgroup_select_victim_node(struct mem_cgroup *memcg); |
1bac180b | 111 | unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, |
bb2a0de9 | 112 | int nid, int zid, unsigned int lrumask); |
3e2f41f1 KM |
113 | struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, |
114 | struct zone *zone); | |
115 | struct zone_reclaim_stat* | |
116 | mem_cgroup_get_reclaim_stat_from_page(struct page *page); | |
e222432b BS |
117 | extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg, |
118 | struct task_struct *p); | |
58ae83db | 119 | |
c077719b KH |
120 | #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP |
121 | extern int do_swap_account; | |
122 | #endif | |
f8d66542 HT |
123 | |
124 | static inline bool mem_cgroup_disabled(void) | |
125 | { | |
126 | if (mem_cgroup_subsys.disabled) | |
127 | return true; | |
128 | return false; | |
129 | } | |
130 | ||
2a7106f2 GT |
131 | void mem_cgroup_update_page_stat(struct page *page, |
132 | enum mem_cgroup_page_stat_item idx, | |
133 | int val); | |
134 | ||
135 | static inline void mem_cgroup_inc_page_stat(struct page *page, | |
136 | enum mem_cgroup_page_stat_item idx) | |
137 | { | |
138 | mem_cgroup_update_page_stat(page, idx, 1); | |
139 | } | |
140 | ||
141 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
142 | enum mem_cgroup_page_stat_item idx) | |
143 | { | |
144 | mem_cgroup_update_page_stat(page, idx, -1); | |
145 | } | |
146 | ||
4e416953 | 147 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, |
0ae5e89c YH |
148 | gfp_t gfp_mask, |
149 | unsigned long *total_scanned); | |
a63d83f4 DR |
150 | u64 mem_cgroup_get_limit(struct mem_cgroup *mem); |
151 | ||
456f998e | 152 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx); |
ca3e0214 KH |
153 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
154 | void mem_cgroup_split_huge_fixup(struct page *head, struct page *tail); | |
155 | #endif | |
156 | ||
f212ad7c DN |
157 | #ifdef CONFIG_DEBUG_VM |
158 | bool mem_cgroup_bad_page_check(struct page *page); | |
159 | void mem_cgroup_print_bad_page(struct page *page); | |
160 | #endif | |
52d4b9ac | 161 | #else /* CONFIG_CGROUP_MEM_RES_CTLR */ |
7a81b88c KH |
162 | struct mem_cgroup; |
163 | ||
164 | static inline int mem_cgroup_newpage_charge(struct page *page, | |
8289546e | 165 | struct mm_struct *mm, gfp_t gfp_mask) |
8a9f3ccd BS |
166 | { |
167 | return 0; | |
168 | } | |
169 | ||
8289546e HD |
170 | static inline int mem_cgroup_cache_charge(struct page *page, |
171 | struct mm_struct *mm, gfp_t gfp_mask) | |
8a9f3ccd | 172 | { |
8289546e | 173 | return 0; |
8a9f3ccd BS |
174 | } |
175 | ||
8c7c6e34 KH |
176 | static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm, |
177 | struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr) | |
7a81b88c KH |
178 | { |
179 | return 0; | |
180 | } | |
181 | ||
182 | static inline void mem_cgroup_commit_charge_swapin(struct page *page, | |
183 | struct mem_cgroup *ptr) | |
184 | { | |
185 | } | |
186 | ||
187 | static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr) | |
188 | { | |
189 | } | |
190 | ||
569b846d KH |
191 | static inline void mem_cgroup_uncharge_start(void) |
192 | { | |
193 | } | |
194 | ||
195 | static inline void mem_cgroup_uncharge_end(void) | |
196 | { | |
197 | } | |
198 | ||
8a9f3ccd BS |
199 | static inline void mem_cgroup_uncharge_page(struct page *page) |
200 | { | |
201 | } | |
202 | ||
69029cd5 KH |
203 | static inline void mem_cgroup_uncharge_cache_page(struct page *page) |
204 | { | |
205 | } | |
206 | ||
08e552c6 KH |
207 | static inline void mem_cgroup_add_lru_list(struct page *page, int lru) |
208 | { | |
209 | } | |
210 | ||
211 | static inline void mem_cgroup_del_lru_list(struct page *page, int lru) | |
212 | { | |
213 | return ; | |
214 | } | |
215 | ||
67954fe9 | 216 | static inline void mem_cgroup_rotate_reclaimable_page(struct page *page) |
3f58a829 MK |
217 | { |
218 | return ; | |
219 | } | |
220 | ||
08e552c6 KH |
221 | static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru) |
222 | { | |
223 | return ; | |
224 | } | |
225 | ||
226 | static inline void mem_cgroup_del_lru(struct page *page) | |
227 | { | |
228 | return ; | |
229 | } | |
230 | ||
231 | static inline void | |
232 | mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to) | |
66e1707b BS |
233 | { |
234 | } | |
235 | ||
e42d9d5d WF |
236 | static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page) |
237 | { | |
238 | return NULL; | |
239 | } | |
240 | ||
a433658c KM |
241 | static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm) |
242 | { | |
243 | return NULL; | |
244 | } | |
245 | ||
bd845e38 | 246 | static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem) |
bed7161a | 247 | { |
60c12b12 | 248 | return 1; |
bed7161a BS |
249 | } |
250 | ||
4c4a2214 DR |
251 | static inline int task_in_mem_cgroup(struct task_struct *task, |
252 | const struct mem_cgroup *mem) | |
253 | { | |
254 | return 1; | |
255 | } | |
256 | ||
d324236b WF |
257 | static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem) |
258 | { | |
259 | return NULL; | |
260 | } | |
261 | ||
e8589cc1 | 262 | static inline int |
ac39cf8c | 263 | mem_cgroup_prepare_migration(struct page *page, struct page *newpage, |
ef6a3c63 | 264 | struct mem_cgroup **ptr, gfp_t gfp_mask) |
ae41be37 KH |
265 | { |
266 | return 0; | |
267 | } | |
268 | ||
01b1ae63 | 269 | static inline void mem_cgroup_end_migration(struct mem_cgroup *mem, |
50de1dd9 | 270 | struct page *oldpage, struct page *newpage, bool migration_ok) |
ae41be37 KH |
271 | { |
272 | } | |
273 | ||
6c48a1d0 KH |
274 | static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) |
275 | { | |
276 | return 0; | |
277 | } | |
278 | ||
279 | static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, | |
280 | int priority) | |
281 | { | |
282 | } | |
283 | ||
284 | static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, | |
285 | int priority) | |
286 | { | |
287 | } | |
288 | ||
f8d66542 HT |
289 | static inline bool mem_cgroup_disabled(void) |
290 | { | |
291 | return true; | |
292 | } | |
a636b327 | 293 | |
14797e23 | 294 | static inline int |
c772be93 | 295 | mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg) |
14797e23 KM |
296 | { |
297 | return 1; | |
298 | } | |
299 | ||
56e49d21 RR |
300 | static inline int |
301 | mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg) | |
302 | { | |
303 | return 1; | |
304 | } | |
305 | ||
a3d8e054 | 306 | static inline unsigned long |
bb2a0de9 KH |
307 | mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, int nid, int zid, |
308 | unsigned int lru_mask) | |
a3d8e054 KM |
309 | { |
310 | return 0; | |
311 | } | |
312 | ||
313 | ||
3e2f41f1 KM |
314 | static inline struct zone_reclaim_stat* |
315 | mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone) | |
316 | { | |
317 | return NULL; | |
318 | } | |
319 | ||
320 | static inline struct zone_reclaim_stat* | |
321 | mem_cgroup_get_reclaim_stat_from_page(struct page *page) | |
322 | { | |
323 | return NULL; | |
324 | } | |
325 | ||
e222432b BS |
326 | static inline void |
327 | mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p) | |
328 | { | |
329 | } | |
330 | ||
2a7106f2 GT |
331 | static inline void mem_cgroup_inc_page_stat(struct page *page, |
332 | enum mem_cgroup_page_stat_item idx) | |
333 | { | |
334 | } | |
335 | ||
336 | static inline void mem_cgroup_dec_page_stat(struct page *page, | |
337 | enum mem_cgroup_page_stat_item idx) | |
d69b042f BS |
338 | { |
339 | } | |
340 | ||
4e416953 BS |
341 | static inline |
342 | unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order, | |
0ae5e89c YH |
343 | gfp_t gfp_mask, |
344 | unsigned long *total_scanned) | |
4e416953 BS |
345 | { |
346 | return 0; | |
347 | } | |
348 | ||
a63d83f4 DR |
349 | static inline |
350 | u64 mem_cgroup_get_limit(struct mem_cgroup *mem) | |
351 | { | |
352 | return 0; | |
353 | } | |
354 | ||
ca3e0214 KH |
355 | static inline void mem_cgroup_split_huge_fixup(struct page *head, |
356 | struct page *tail) | |
357 | { | |
358 | } | |
359 | ||
456f998e YH |
360 | static inline |
361 | void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx) | |
362 | { | |
363 | } | |
78fb7466 PE |
364 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
365 | ||
f212ad7c DN |
366 | #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM) |
367 | static inline bool | |
368 | mem_cgroup_bad_page_check(struct page *page) | |
369 | { | |
370 | return false; | |
371 | } | |
372 | ||
373 | static inline void | |
374 | mem_cgroup_print_bad_page(struct page *page) | |
375 | { | |
376 | } | |
377 | #endif | |
378 | ||
8cdea7c0 BS |
379 | #endif /* _LINUX_MEMCONTROL_H */ |
380 |