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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
22
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
Pavel Emelianov78fb7462008-02-07 00:13:51 -080029
Hugh Dickins9442ec9d2008-03-04 14:29:07 -080030#define page_reset_bad_cgroup(page) ((page)->page_cgroup = 0)
31
Pavel Emelianov78fb7462008-02-07 00:13:51 -080032extern struct page_cgroup *page_get_page_cgroup(struct page *page);
Balbir Singhe1a1cd52008-02-07 00:14:02 -080033extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
34 gfp_t gfp_mask);
Hugh Dickins82895462008-03-04 14:29:08 -080035extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
36 gfp_t gfp_mask);
Balbir Singh3c541e12008-02-07 00:14:41 -080037extern void mem_cgroup_uncharge_page(struct page *page);
Hugh Dickins427d5412008-03-04 14:29:03 -080038extern void mem_cgroup_move_lists(struct page *page, bool active);
Balbir Singh66e17072008-02-07 00:13:56 -080039extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
40 struct list_head *dst,
41 unsigned long *scanned, int order,
42 int mode, struct zone *z,
43 struct mem_cgroup *mem_cont,
44 int active);
Pavel Emelianovc7ba5c92008-02-07 00:13:58 -080045extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
David Rientjes4c4a2212008-02-07 00:14:06 -080046int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
David Rientjes3062fc62008-02-07 00:14:03 -080047
Balbir Singhcf475ad2008-04-29 01:00:16 -070048extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
49
Hugh Dickinsbd845e32008-03-04 14:29:01 -080050#define mm_match_cgroup(mm, cgroup) \
Balbir Singhcf475ad2008-04-29 01:00:16 -070051 ((cgroup) == mem_cgroup_from_task((mm)->owner))
Balbir Singh8a9f3cc2008-02-07 00:13:53 -080052
KAMEZAWA Hiroyukiae41be32008-02-07 00:14:10 -080053extern int mem_cgroup_prepare_migration(struct page *page);
54extern void mem_cgroup_end_migration(struct page *page);
55extern void mem_cgroup_page_migration(struct page *page, struct page *newpage);
56
KAMEZAWA Hiroyuki58ae83d2008-02-07 00:14:32 -080057/*
58 * For memory reclaim.
59 */
60extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
KAMEZAWA Hiroyuki5932f362008-02-07 00:14:33 -080061extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
62
KAMEZAWA Hiroyuki6c48a1d2008-02-07 00:14:34 -080063extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
64extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
65 int priority);
66extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
67 int priority);
KAMEZAWA Hiroyuki58ae83d2008-02-07 00:14:32 -080068
KAMEZAWA Hiroyukicc381082008-02-07 00:14:35 -080069extern long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
70 struct zone *zone, int priority);
71extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
72 struct zone *zone, int priority);
KAMEZAWA Hiroyuki58ae83d2008-02-07 00:14:32 -080073
Balbir Singh00f0b822008-03-04 14:28:39 -080074#else /* CONFIG_CGROUP_MEM_RES_CTLR */
Hugh Dickins9442ec9d2008-03-04 14:29:07 -080075static inline void page_reset_bad_cgroup(struct page *page)
Pavel Emelianov78fb7462008-02-07 00:13:51 -080076{
77}
78
79static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
80{
81 return NULL;
82}
83
Hugh Dickins82895462008-03-04 14:29:08 -080084static inline int mem_cgroup_charge(struct page *page,
85 struct mm_struct *mm, gfp_t gfp_mask)
Balbir Singh8a9f3cc2008-02-07 00:13:53 -080086{
87 return 0;
88}
89
Hugh Dickins82895462008-03-04 14:29:08 -080090static inline int mem_cgroup_cache_charge(struct page *page,
91 struct mm_struct *mm, gfp_t gfp_mask)
Balbir Singh8a9f3cc2008-02-07 00:13:53 -080092{
Hugh Dickins82895462008-03-04 14:29:08 -080093 return 0;
Balbir Singh8a9f3cc2008-02-07 00:13:53 -080094}
95
96static inline void mem_cgroup_uncharge_page(struct page *page)
97{
98}
99
Hugh Dickins427d5412008-03-04 14:29:03 -0800100static inline void mem_cgroup_move_lists(struct page *page, bool active)
Balbir Singh66e17072008-02-07 00:13:56 -0800101{
102}
103
Hugh Dickinsbd845e32008-03-04 14:29:01 -0800104static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
Balbir Singhbed71612008-02-07 00:14:01 -0800105{
David Rientjes60c12b12008-02-09 00:10:15 -0800106 return 1;
Balbir Singhbed71612008-02-07 00:14:01 -0800107}
108
David Rientjes4c4a2212008-02-07 00:14:06 -0800109static inline int task_in_mem_cgroup(struct task_struct *task,
110 const struct mem_cgroup *mem)
111{
112 return 1;
113}
114
KAMEZAWA Hiroyukiae41be32008-02-07 00:14:10 -0800115static inline int mem_cgroup_prepare_migration(struct page *page)
116{
117 return 0;
118}
119
120static inline void mem_cgroup_end_migration(struct page *page)
121{
122}
123
124static inline void
125mem_cgroup_page_migration(struct page *page, struct page *newpage)
126{
127}
128
KAMEZAWA Hiroyuki58ae83d2008-02-07 00:14:32 -0800129static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
130{
131 return 0;
132}
KAMEZAWA Hiroyuki5932f362008-02-07 00:14:33 -0800133
134static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
135{
136 return 0;
137}
138
KAMEZAWA Hiroyuki6c48a1d2008-02-07 00:14:34 -0800139static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
140{
141 return 0;
142}
143
144static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
145 int priority)
146{
147}
148
149static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
150 int priority)
151{
152}
153
KAMEZAWA Hiroyukicc381082008-02-07 00:14:35 -0800154static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
155 struct zone *zone, int priority)
156{
157 return 0;
158}
159
160static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
161 struct zone *zone, int priority)
162{
163 return 0;
164}
Pavel Emelianov78fb7462008-02-07 00:13:51 -0800165#endif /* CONFIG_CGROUP_MEM_CONT */
166
Balbir Singh8cdea7c2008-02-07 00:13:50 -0800167#endif /* _LINUX_MEMCONTROL_H */
168