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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); |
66e1707b BS |
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); |
e1a1cd59 BS |
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 | /* |
68 | * For memory reclaim. | |
69 | */ | |
70 | extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem); | |
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71 | extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem); |
72 | ||
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73 | extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem); |
74 | extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, | |
75 | int priority); | |
76 | extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, | |
77 | int priority); | |
58ae83db | 78 | |
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79 | extern long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem, |
80 | struct zone *zone, int priority); | |
81 | extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem, | |
82 | struct zone *zone, int priority); | |
58ae83db | 83 | |
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84 | #else /* CONFIG_CGROUP_MEM_CONT */ |
85 | static inline void mm_init_cgroup(struct mm_struct *mm, | |
86 | struct task_struct *p) | |
87 | { | |
88 | } | |
89 | ||
90 | static inline void mm_free_cgroup(struct mm_struct *mm) | |
91 | { | |
92 | } | |
93 | ||
94 | static inline void page_assign_page_cgroup(struct page *page, | |
95 | struct page_cgroup *pc) | |
96 | { | |
97 | } | |
98 | ||
99 | static inline struct page_cgroup *page_get_page_cgroup(struct page *page) | |
100 | { | |
101 | return NULL; | |
102 | } | |
103 | ||
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104 | static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm, |
105 | gfp_t gfp_mask) | |
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106 | { |
107 | return 0; | |
108 | } | |
109 | ||
110 | static inline void mem_cgroup_uncharge(struct page_cgroup *pc) | |
111 | { | |
112 | } | |
113 | ||
114 | static inline void mem_cgroup_uncharge_page(struct page *page) | |
115 | { | |
116 | } | |
117 | ||
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118 | static inline void mem_cgroup_move_lists(struct page_cgroup *pc, |
119 | bool active) | |
120 | { | |
121 | } | |
122 | ||
8697d331 | 123 | static inline int mem_cgroup_cache_charge(struct page *page, |
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124 | struct mm_struct *mm, |
125 | gfp_t gfp_mask) | |
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126 | { |
127 | return 0; | |
128 | } | |
129 | ||
3062fc67 | 130 | static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm) |
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131 | { |
132 | return NULL; | |
133 | } | |
134 | ||
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135 | static inline int task_in_mem_cgroup(struct task_struct *task, |
136 | const struct mem_cgroup *mem) | |
137 | { | |
138 | return 1; | |
139 | } | |
140 | ||
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141 | static inline int mem_cgroup_prepare_migration(struct page *page) |
142 | { | |
143 | return 0; | |
144 | } | |
145 | ||
146 | static inline void mem_cgroup_end_migration(struct page *page) | |
147 | { | |
148 | } | |
149 | ||
150 | static inline void | |
151 | mem_cgroup_page_migration(struct page *page, struct page *newpage) | |
152 | { | |
153 | } | |
154 | ||
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155 | static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem) |
156 | { | |
157 | return 0; | |
158 | } | |
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159 | |
160 | static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem) | |
161 | { | |
162 | return 0; | |
163 | } | |
164 | ||
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165 | static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) |
166 | { | |
167 | return 0; | |
168 | } | |
169 | ||
170 | static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, | |
171 | int priority) | |
172 | { | |
173 | } | |
174 | ||
175 | static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, | |
176 | int priority) | |
177 | { | |
178 | } | |
179 | ||
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180 | static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem, |
181 | struct zone *zone, int priority) | |
182 | { | |
183 | return 0; | |
184 | } | |
185 | ||
186 | static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem, | |
187 | struct zone *zone, int priority) | |
188 | { | |
189 | return 0; | |
190 | } | |
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191 | #endif /* CONFIG_CGROUP_MEM_CONT */ |
192 | ||
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193 | #endif /* _LINUX_MEMCONTROL_H */ |
194 |