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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 | #include <linux/rcupdate.h> |
24 | #include <linux/mm.h> | |
25 | ||
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26 | struct mem_cgroup; |
27 | struct page_cgroup; | |
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28 | struct page; |
29 | struct mm_struct; | |
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30 | |
31 | #ifdef CONFIG_CGROUP_MEM_CONT | |
32 | ||
33 | extern void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p); | |
34 | extern void mm_free_cgroup(struct mm_struct *mm); | |
35 | extern void page_assign_page_cgroup(struct page *page, | |
36 | struct page_cgroup *pc); | |
37 | extern struct page_cgroup *page_get_page_cgroup(struct page *page); | |
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38 | extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm, |
39 | gfp_t gfp_mask); | |
8a9f3ccd | 40 | extern void mem_cgroup_uncharge(struct page_cgroup *pc); |
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41 | extern void mem_cgroup_move_lists(struct page_cgroup *pc, bool active); |
42 | extern 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); | |
c7ba5c9e | 48 | extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask); |
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49 | extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, |
50 | gfp_t gfp_mask); | |
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51 | |
52 | static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm) | |
53 | { | |
54 | return rcu_dereference(mm->mem_cgroup); | |
55 | } | |
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56 | |
57 | static inline void mem_cgroup_uncharge_page(struct page *page) | |
58 | { | |
59 | mem_cgroup_uncharge(page_get_page_cgroup(page)); | |
60 | } | |
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61 | |
62 | #else /* CONFIG_CGROUP_MEM_CONT */ | |
63 | static inline void mm_init_cgroup(struct mm_struct *mm, | |
64 | struct task_struct *p) | |
65 | { | |
66 | } | |
67 | ||
68 | static inline void mm_free_cgroup(struct mm_struct *mm) | |
69 | { | |
70 | } | |
71 | ||
72 | static inline void page_assign_page_cgroup(struct page *page, | |
73 | struct page_cgroup *pc) | |
74 | { | |
75 | } | |
76 | ||
77 | static inline struct page_cgroup *page_get_page_cgroup(struct page *page) | |
78 | { | |
79 | return NULL; | |
80 | } | |
81 | ||
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82 | static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm, |
83 | gfp_t gfp_mask) | |
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84 | { |
85 | return 0; | |
86 | } | |
87 | ||
88 | static inline void mem_cgroup_uncharge(struct page_cgroup *pc) | |
89 | { | |
90 | } | |
91 | ||
92 | static inline void mem_cgroup_uncharge_page(struct page *page) | |
93 | { | |
94 | } | |
95 | ||
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96 | static inline void mem_cgroup_move_lists(struct page_cgroup *pc, |
97 | bool active) | |
98 | { | |
99 | } | |
100 | ||
8697d331 | 101 | static inline int mem_cgroup_cache_charge(struct page *page, |
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102 | struct mm_struct *mm, |
103 | gfp_t gfp_mask) | |
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104 | { |
105 | return 0; | |
106 | } | |
107 | ||
3062fc67 | 108 | static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm) |
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109 | { |
110 | return NULL; | |
111 | } | |
112 | ||
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113 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
114 | ||
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115 | #endif /* _LINUX_MEMCONTROL_H */ |
116 |