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Balbir Singh8cdea7c2008-02-07 00:13:50 -08001/* memcontrol.h - Memory Controller
2 *
3 * Copyright IBM Corporation, 2007
4 * Author Balbir Singh <balbir@linux.vnet.ibm.com>
5 *
Pavel Emelianov78fb7462008-02-07 00:13:51 -08006 * Copyright 2007 OpenVZ SWsoft Inc
7 * Author: Pavel Emelianov <xemul@openvz.org>
8 *
Balbir Singh8cdea7c2008-02-07 00:13:50 -08009 * 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
Hirokazu Takahashif8d66542009-01-07 18:08:02 -080022#include <linux/cgroup.h>
Pavel Emelianov78fb7462008-02-07 00:13:51 -080023struct mem_cgroup;
24struct page_cgroup;
Balbir Singh8697d332008-02-07 00:13:59 -080025struct page;
26struct mm_struct;
Pavel Emelianov78fb7462008-02-07 00:13:51 -080027
Balbir Singh00f0b822008-03-04 14:28:39 -080028#ifdef CONFIG_CGROUP_MEM_RES_CTLR
KAMEZAWA Hiroyuki2c26fdd2009-01-07 18:08:10 -080029/*
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 */
Pavel Emelianov78fb7462008-02-07 00:13:51 -080039
KAMEZAWA Hiroyuki7a81b882009-01-07 18:07:48 -080040extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
Balbir Singhe1a1cd52008-02-07 00:14:02 -080041 gfp_t gfp_mask);
KAMEZAWA Hiroyuki7a81b882009-01-07 18:07:48 -080042/* for swap handling */
KAMEZAWA Hiroyuki8c7c6e32009-01-07 18:08:00 -080043extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
44 struct page *page, gfp_t mask, struct mem_cgroup **ptr);
KAMEZAWA Hiroyuki7a81b882009-01-07 18:07:48 -080045extern void mem_cgroup_commit_charge_swapin(struct page *page,
46 struct mem_cgroup *ptr);
47extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr);
48
Hugh Dickins82895462008-03-04 14:29:08 -080049extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
50 gfp_t gfp_mask);
KAMEZAWA Hiroyuki08e552c2009-01-07 18:08:01 -080051extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru);
52extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru);
53extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru);
54extern void mem_cgroup_del_lru(struct page *page);
55extern void mem_cgroup_move_lists(struct page *page,
56 enum lru_list from, enum lru_list to);
Balbir Singh3c541e12008-02-07 00:14:41 -080057extern void mem_cgroup_uncharge_page(struct page *page);
KAMEZAWA Hiroyuki69029cd2008-07-25 01:47:14 -070058extern void mem_cgroup_uncharge_cache_page(struct page *page);
Daisuke Nishimuraae3abae2009-04-30 15:08:19 -070059extern int mem_cgroup_shmem_charge_fallback(struct page *page,
KAMEZAWA Hiroyukib5a84312009-01-07 18:08:35 -080060 struct mm_struct *mm, gfp_t gfp_mask);
KAMEZAWA Hiroyukic9b0ed52008-07-25 01:47:15 -070061
Balbir Singh66e17072008-02-07 00:13:56 -080062extern 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,
Rik van Riel4f98a2f2008-10-18 20:26:32 -070067 int active, int file);
Pavel Emelianovc7ba5c92008-02-07 00:13:58 -080068extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
David Rientjes4c4a2212008-02-07 00:14:06 -080069int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
David Rientjes3062fc62008-02-07 00:14:03 -080070
Balbir Singhcf475ad2008-04-29 01:00:16 -070071extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
72
Lai Jiangshan2e4d4092009-01-07 18:08:07 -080073static inline
74int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
75{
76 struct mem_cgroup *mem;
77 rcu_read_lock();
KAMEZAWA Hiroyukie638c132009-04-21 12:24:41 -070078 mem = mem_cgroup_from_task(rcu_dereference((mm)->owner));
Lai Jiangshan2e4d4092009-01-07 18:08:07 -080079 rcu_read_unlock();
80 return cgroup == mem;
81}
Balbir Singh8a9f3cc2008-02-07 00:13:53 -080082
KAMEZAWA Hiroyukie8589cc2008-07-25 01:47:10 -070083extern int
KAMEZAWA Hiroyuki01b1ae62009-01-07 18:07:50 -080084mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr);
85extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
86 struct page *oldpage, struct page *newpage);
KAMEZAWA Hiroyukiae41be32008-02-07 00:14:10 -080087
KAMEZAWA Hiroyuki58ae83d2008-02-07 00:14:32 -080088/*
89 * For memory reclaim.
90 */
KAMEZAWA Hiroyuki6c48a1d2008-02-07 00:14:34 -080091extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
92extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
93 int priority);
94extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
95 int priority);
KOSAKI Motohiroc772be92009-01-07 18:08:25 -080096int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg);
Rik van Riel56e49d22009-06-16 15:32:28 -070097int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg);
KOSAKI Motohiroa3d8e052009-01-07 18:08:19 -080098unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg,
99 struct zone *zone,
100 enum lru_list lru);
KOSAKI Motohiro3e2f41f2009-01-07 18:08:20 -0800101struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg,
102 struct zone *zone);
103struct zone_reclaim_stat*
104mem_cgroup_get_reclaim_stat_from_page(struct page *page);
Balbir Singhe2224322009-04-02 16:57:39 -0700105extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
106 struct task_struct *p);
KAMEZAWA Hiroyuki58ae83d2008-02-07 00:14:32 -0800107
KAMEZAWA Hiroyukic0777192009-01-07 18:07:57 -0800108#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
109extern int do_swap_account;
110#endif
Hirokazu Takahashif8d66542009-01-07 18:08:02 -0800111
112static inline bool mem_cgroup_disabled(void)
113{
114 if (mem_cgroup_subsys.disabled)
115 return true;
116 return false;
117}
118
KAMEZAWA Hiroyukia636b322009-01-07 18:08:08 -0800119extern bool mem_cgroup_oom_called(struct task_struct *task);
Balbir Singhd69b0422009-06-17 16:26:34 -0700120void mem_cgroup_update_mapped_file_stat(struct page *page, int val);
Balbir Singh4e416952009-09-23 15:56:39 -0700121unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
122 gfp_t gfp_mask, int nid,
123 int zid);
Balbir Singh00f0b822008-03-04 14:28:39 -0800124#else /* CONFIG_CGROUP_MEM_RES_CTLR */
KAMEZAWA Hiroyuki7a81b882009-01-07 18:07:48 -0800125struct mem_cgroup;
126
127static inline int mem_cgroup_newpage_charge(struct page *page,
Hugh Dickins82895462008-03-04 14:29:08 -0800128 struct mm_struct *mm, gfp_t gfp_mask)
Balbir Singh8a9f3cc2008-02-07 00:13:53 -0800129{
130 return 0;
131}
132
Hugh Dickins82895462008-03-04 14:29:08 -0800133static inline int mem_cgroup_cache_charge(struct page *page,
134 struct mm_struct *mm, gfp_t gfp_mask)
Balbir Singh8a9f3cc2008-02-07 00:13:53 -0800135{
Hugh Dickins82895462008-03-04 14:29:08 -0800136 return 0;
Balbir Singh8a9f3cc2008-02-07 00:13:53 -0800137}
138
KAMEZAWA Hiroyuki8c7c6e32009-01-07 18:08:00 -0800139static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
140 struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr)
KAMEZAWA Hiroyuki7a81b882009-01-07 18:07:48 -0800141{
142 return 0;
143}
144
145static inline void mem_cgroup_commit_charge_swapin(struct page *page,
146 struct mem_cgroup *ptr)
147{
148}
149
150static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr)
151{
152}
153
Balbir Singh8a9f3cc2008-02-07 00:13:53 -0800154static inline void mem_cgroup_uncharge_page(struct page *page)
155{
156}
157
KAMEZAWA Hiroyuki69029cd2008-07-25 01:47:14 -0700158static inline void mem_cgroup_uncharge_cache_page(struct page *page)
159{
160}
161
Daisuke Nishimuraae3abae2009-04-30 15:08:19 -0700162static inline int mem_cgroup_shmem_charge_fallback(struct page *page,
KAMEZAWA Hiroyukib5a84312009-01-07 18:08:35 -0800163 struct mm_struct *mm, gfp_t gfp_mask)
KAMEZAWA Hiroyukic9b0ed52008-07-25 01:47:15 -0700164{
165 return 0;
166}
167
KAMEZAWA Hiroyuki08e552c2009-01-07 18:08:01 -0800168static inline void mem_cgroup_add_lru_list(struct page *page, int lru)
169{
170}
171
172static inline void mem_cgroup_del_lru_list(struct page *page, int lru)
173{
174 return ;
175}
176
177static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru)
178{
179 return ;
180}
181
182static inline void mem_cgroup_del_lru(struct page *page)
183{
184 return ;
185}
186
187static inline void
188mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to)
Balbir Singh66e17072008-02-07 00:13:56 -0800189{
190}
191
Hugh Dickinsbd845e32008-03-04 14:29:01 -0800192static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
Balbir Singhbed71612008-02-07 00:14:01 -0800193{
David Rientjes60c12b12008-02-09 00:10:15 -0800194 return 1;
Balbir Singhbed71612008-02-07 00:14:01 -0800195}
196
David Rientjes4c4a2212008-02-07 00:14:06 -0800197static inline int task_in_mem_cgroup(struct task_struct *task,
198 const struct mem_cgroup *mem)
199{
200 return 1;
201}
202
KAMEZAWA Hiroyukie8589cc2008-07-25 01:47:10 -0700203static inline int
KAMEZAWA Hiroyuki01b1ae62009-01-07 18:07:50 -0800204mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr)
KAMEZAWA Hiroyukiae41be32008-02-07 00:14:10 -0800205{
206 return 0;
207}
208
KAMEZAWA Hiroyuki01b1ae62009-01-07 18:07:50 -0800209static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
210 struct page *oldpage,
211 struct page *newpage)
KAMEZAWA Hiroyukiae41be32008-02-07 00:14:10 -0800212{
213}
214
KAMEZAWA Hiroyuki6c48a1d2008-02-07 00:14:34 -0800215static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
216{
217 return 0;
218}
219
220static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
221 int priority)
222{
223}
224
225static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
226 int priority)
227{
228}
229
Hirokazu Takahashif8d66542009-01-07 18:08:02 -0800230static inline bool mem_cgroup_disabled(void)
231{
232 return true;
233}
KAMEZAWA Hiroyukia636b322009-01-07 18:08:08 -0800234
235static inline bool mem_cgroup_oom_called(struct task_struct *task)
236{
237 return false;
238}
KOSAKI Motohiro14797e22009-01-07 18:08:18 -0800239
240static inline int
KOSAKI Motohiroc772be92009-01-07 18:08:25 -0800241mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg)
KOSAKI Motohiro14797e22009-01-07 18:08:18 -0800242{
243 return 1;
244}
245
Rik van Riel56e49d22009-06-16 15:32:28 -0700246static inline int
247mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg)
248{
249 return 1;
250}
251
KOSAKI Motohiroa3d8e052009-01-07 18:08:19 -0800252static inline unsigned long
253mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone,
254 enum lru_list lru)
255{
256 return 0;
257}
258
259
KOSAKI Motohiro3e2f41f2009-01-07 18:08:20 -0800260static inline struct zone_reclaim_stat*
261mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone)
262{
263 return NULL;
264}
265
266static inline struct zone_reclaim_stat*
267mem_cgroup_get_reclaim_stat_from_page(struct page *page)
268{
269 return NULL;
270}
271
Balbir Singhe2224322009-04-02 16:57:39 -0700272static inline void
273mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
274{
275}
276
Balbir Singhd69b0422009-06-17 16:26:34 -0700277static inline void mem_cgroup_update_mapped_file_stat(struct page *page,
278 int val)
279{
280}
281
Balbir Singh4e416952009-09-23 15:56:39 -0700282static inline
283unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
284 gfp_t gfp_mask, int nid, int zid)
285{
286 return 0;
287}
288
Pavel Emelianov78fb7462008-02-07 00:13:51 -0800289#endif /* CONFIG_CGROUP_MEM_CONT */
290
Balbir Singh8cdea7c2008-02-07 00:13:50 -0800291#endif /* _LINUX_MEMCONTROL_H */
292