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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); | |
4c4a2214 | 51 | int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem); |
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52 | |
53 | static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm) | |
54 | { | |
55 | return rcu_dereference(mm->mem_cgroup); | |
56 | } | |
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57 | |
58 | static inline void mem_cgroup_uncharge_page(struct page *page) | |
59 | { | |
60 | mem_cgroup_uncharge(page_get_page_cgroup(page)); | |
61 | } | |
78fb7466 | 62 | |
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63 | extern int mem_cgroup_prepare_migration(struct page *page); |
64 | extern void mem_cgroup_end_migration(struct page *page); | |
65 | extern void mem_cgroup_page_migration(struct page *page, struct page *newpage); | |
66 | ||
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67 | #else /* CONFIG_CGROUP_MEM_CONT */ |
68 | static inline void mm_init_cgroup(struct mm_struct *mm, | |
69 | struct task_struct *p) | |
70 | { | |
71 | } | |
72 | ||
73 | static inline void mm_free_cgroup(struct mm_struct *mm) | |
74 | { | |
75 | } | |
76 | ||
77 | static inline void page_assign_page_cgroup(struct page *page, | |
78 | struct page_cgroup *pc) | |
79 | { | |
80 | } | |
81 | ||
82 | static inline struct page_cgroup *page_get_page_cgroup(struct page *page) | |
83 | { | |
84 | return NULL; | |
85 | } | |
86 | ||
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87 | static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm, |
88 | gfp_t gfp_mask) | |
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89 | { |
90 | return 0; | |
91 | } | |
92 | ||
93 | static inline void mem_cgroup_uncharge(struct page_cgroup *pc) | |
94 | { | |
95 | } | |
96 | ||
97 | static inline void mem_cgroup_uncharge_page(struct page *page) | |
98 | { | |
99 | } | |
100 | ||
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101 | static inline void mem_cgroup_move_lists(struct page_cgroup *pc, |
102 | bool active) | |
103 | { | |
104 | } | |
105 | ||
8697d331 | 106 | static inline int mem_cgroup_cache_charge(struct page *page, |
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107 | struct mm_struct *mm, |
108 | gfp_t gfp_mask) | |
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109 | { |
110 | return 0; | |
111 | } | |
112 | ||
3062fc67 | 113 | static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm) |
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114 | { |
115 | return NULL; | |
116 | } | |
117 | ||
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118 | static inline int task_in_mem_cgroup(struct task_struct *task, |
119 | const struct mem_cgroup *mem) | |
120 | { | |
121 | return 1; | |
122 | } | |
123 | ||
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124 | static inline int mem_cgroup_prepare_migration(struct page *page) |
125 | { | |
126 | return 0; | |
127 | } | |
128 | ||
129 | static inline void mem_cgroup_end_migration(struct page *page) | |
130 | { | |
131 | } | |
132 | ||
133 | static inline void | |
134 | mem_cgroup_page_migration(struct page *page, struct page *newpage) | |
135 | { | |
136 | } | |
137 | ||
138 | ||
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139 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
140 | ||
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141 | #endif /* _LINUX_MEMCONTROL_H */ |
142 |