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1 | /* memcontrol.h - Memory Controller |
2 | * | |
3 | * Copyright IBM Corporation, 2007 | |
4 | * Author Balbir Singh <balbir@linux.vnet.ibm.com> | |
5 | * | |
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6 | * Copyright 2007 OpenVZ SWsoft Inc |
7 | * Author: Pavel Emelianov <xemul@openvz.org> | |
8 | * | |
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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 | |
22 | ||
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23 | struct mem_cgroup; |
24 | struct page_cgroup; | |
25 | ||
26 | #ifdef CONFIG_CGROUP_MEM_CONT | |
27 | ||
28 | extern void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p); | |
29 | extern void mm_free_cgroup(struct mm_struct *mm); | |
30 | extern void page_assign_page_cgroup(struct page *page, | |
31 | struct page_cgroup *pc); | |
32 | extern struct page_cgroup *page_get_page_cgroup(struct page *page); | |
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33 | extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm); |
34 | extern void mem_cgroup_uncharge(struct page_cgroup *pc); | |
35 | ||
36 | static inline void mem_cgroup_uncharge_page(struct page *page) | |
37 | { | |
38 | mem_cgroup_uncharge(page_get_page_cgroup(page)); | |
39 | } | |
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40 | |
41 | #else /* CONFIG_CGROUP_MEM_CONT */ | |
42 | static inline void mm_init_cgroup(struct mm_struct *mm, | |
43 | struct task_struct *p) | |
44 | { | |
45 | } | |
46 | ||
47 | static inline void mm_free_cgroup(struct mm_struct *mm) | |
48 | { | |
49 | } | |
50 | ||
51 | static inline void page_assign_page_cgroup(struct page *page, | |
52 | struct page_cgroup *pc) | |
53 | { | |
54 | } | |
55 | ||
56 | static inline struct page_cgroup *page_get_page_cgroup(struct page *page) | |
57 | { | |
58 | return NULL; | |
59 | } | |
60 | ||
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61 | static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm) |
62 | { | |
63 | return 0; | |
64 | } | |
65 | ||
66 | static inline void mem_cgroup_uncharge(struct page_cgroup *pc) | |
67 | { | |
68 | } | |
69 | ||
70 | static inline void mem_cgroup_uncharge_page(struct page *page) | |
71 | { | |
72 | } | |
73 | ||
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74 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
75 | ||
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76 | #endif /* _LINUX_MEMCONTROL_H */ |
77 |