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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
David Rientjes3062fc62008-02-07 00:14:03 -080023#include <linux/rcupdate.h>
24#include <linux/mm.h>
25
Pavel Emelianov78fb7462008-02-07 00:13:51 -080026struct mem_cgroup;
27struct page_cgroup;
Balbir Singh8697d332008-02-07 00:13:59 -080028struct page;
29struct mm_struct;
Pavel Emelianov78fb7462008-02-07 00:13:51 -080030
31#ifdef CONFIG_CGROUP_MEM_CONT
32
33extern void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p);
34extern void mm_free_cgroup(struct mm_struct *mm);
35extern void page_assign_page_cgroup(struct page *page,
36 struct page_cgroup *pc);
37extern struct page_cgroup *page_get_page_cgroup(struct page *page);
Balbir Singhe1a1cd52008-02-07 00:14:02 -080038extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
39 gfp_t gfp_mask);
Balbir Singh8a9f3cc2008-02-07 00:13:53 -080040extern void mem_cgroup_uncharge(struct page_cgroup *pc);
Balbir Singh66e17072008-02-07 00:13:56 -080041extern void mem_cgroup_move_lists(struct page_cgroup *pc, bool active);
42extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
43 struct list_head *dst,
44 unsigned long *scanned, int order,
45 int mode, struct zone *z,
46 struct mem_cgroup *mem_cont,
47 int active);
Pavel Emelianovc7ba5c92008-02-07 00:13:58 -080048extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
Balbir Singhe1a1cd52008-02-07 00:14:02 -080049extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
50 gfp_t gfp_mask);
David Rientjes4c4a2212008-02-07 00:14:06 -080051int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
David Rientjes3062fc62008-02-07 00:14:03 -080052
53static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm)
54{
55 return rcu_dereference(mm->mem_cgroup);
56}
Balbir Singh8a9f3cc2008-02-07 00:13:53 -080057
58static inline void mem_cgroup_uncharge_page(struct page *page)
59{
60 mem_cgroup_uncharge(page_get_page_cgroup(page));
61}
Pavel Emelianov78fb7462008-02-07 00:13:51 -080062
63#else /* CONFIG_CGROUP_MEM_CONT */
64static inline void mm_init_cgroup(struct mm_struct *mm,
65 struct task_struct *p)
66{
67}
68
69static inline void mm_free_cgroup(struct mm_struct *mm)
70{
71}
72
73static inline void page_assign_page_cgroup(struct page *page,
74 struct page_cgroup *pc)
75{
76}
77
78static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
79{
80 return NULL;
81}
82
Balbir Singhe1a1cd52008-02-07 00:14:02 -080083static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
84 gfp_t gfp_mask)
Balbir Singh8a9f3cc2008-02-07 00:13:53 -080085{
86 return 0;
87}
88
89static inline void mem_cgroup_uncharge(struct page_cgroup *pc)
90{
91}
92
93static inline void mem_cgroup_uncharge_page(struct page *page)
94{
95}
96
Balbir Singh66e17072008-02-07 00:13:56 -080097static inline void mem_cgroup_move_lists(struct page_cgroup *pc,
98 bool active)
99{
100}
101
Balbir Singh8697d332008-02-07 00:13:59 -0800102static inline int mem_cgroup_cache_charge(struct page *page,
Balbir Singhe1a1cd52008-02-07 00:14:02 -0800103 struct mm_struct *mm,
104 gfp_t gfp_mask)
Balbir Singh8697d332008-02-07 00:13:59 -0800105{
106 return 0;
107}
108
David Rientjes3062fc62008-02-07 00:14:03 -0800109static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm)
Balbir Singhbed71612008-02-07 00:14:01 -0800110{
111 return NULL;
112}
113
David Rientjes4c4a2212008-02-07 00:14:06 -0800114static inline int task_in_mem_cgroup(struct task_struct *task,
115 const struct mem_cgroup *mem)
116{
117 return 1;
118}
119
Pavel Emelianov78fb7462008-02-07 00:13:51 -0800120#endif /* CONFIG_CGROUP_MEM_CONT */
121
Balbir Singh8cdea7c2008-02-07 00:13:50 -0800122#endif /* _LINUX_MEMCONTROL_H */
123