1 /* memcontrol.h - Memory Controller
2 *
3 * Copyright IBM Corporation, 2007
4 * Author Balbir Singh <balbir@linux.vnet.ibm.com>
5 *
6 * Copyright 2007 OpenVZ SWsoft Inc
7 * Author: Pavel Emelianov <xemul@openvz.org>
8 *
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
23 struct mem_cgroup;
24 struct page_cgroup;
25 struct page;
26 struct mm_struct;
27
28 #ifdef CONFIG_CGROUP_MEM_RES_CTLR
29
30 extern void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p);
31 extern void mm_free_cgroup(struct mm_struct *mm);
32
33 #define page_reset_bad_cgroup(page) ((page)->page_cgroup = 0)
34
35 extern struct page_cgroup *page_get_page_cgroup(struct page *page);
36 extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
37 gfp_t gfp_mask);
38 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
39 gfp_t gfp_mask);
40 extern void mem_cgroup_uncharge_page(struct page *page);
41 extern void mem_cgroup_move_lists(struct page *page, 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);
48 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
49 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
50
51 #define mm_match_cgroup(mm, cgroup) \
52 ((cgroup) == rcu_dereference((mm)->mem_cgroup))
53
54 extern int mem_cgroup_prepare_migration(struct page *page);
55 extern void mem_cgroup_end_migration(struct page *page);
56 extern void mem_cgroup_page_migration(struct page *page, struct page *newpage);
57
58 /*
59 * For memory reclaim.
60 */
61 extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
62 extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
63
64 extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
65 extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
66 int priority);
67 extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
68 int priority);
69
70 extern long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
71 struct zone *zone, int priority);
72 extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
73 struct zone *zone, int priority);
74
75 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
76 static inline void mm_init_cgroup(struct mm_struct *mm,
77 struct task_struct *p)
78 {
79 }
80
81 static inline void mm_free_cgroup(struct mm_struct *mm)
82 {
83 }
84
85 static inline void page_reset_bad_cgroup(struct page *page)
86 {
87 }
88
89 static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
90 {
91 return NULL;
92 }
93
94 static inline int mem_cgroup_charge(struct page *page,
95 struct mm_struct *mm, gfp_t gfp_mask)
96 {
97 return 0;
98 }
99
100 static inline int mem_cgroup_cache_charge(struct page *page,
101 struct mm_struct *mm, gfp_t gfp_mask)
102 {
103 return 0;
104 }
105
106 static inline void mem_cgroup_uncharge_page(struct page *page)
107 {
108 }
109
110 static inline void mem_cgroup_move_lists(struct page *page, bool active)
111 {
112 }
113
114 static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
115 {
116 return 1;
117 }
118
119 static inline int task_in_mem_cgroup(struct task_struct *task,
120 const struct mem_cgroup *mem)
121 {
122 return 1;
123 }
124
125 static inline int mem_cgroup_prepare_migration(struct page *page)
126 {
127 return 0;
128 }
129
130 static inline void mem_cgroup_end_migration(struct page *page)
131 {
132 }
133
134 static inline void
135 mem_cgroup_page_migration(struct page *page, struct page *newpage)
136 {
137 }
138
139 static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
140 {
141 return 0;
142 }
143
144 static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
145 {
146 return 0;
147 }
148
149 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
150 {
151 return 0;
152 }
153
154 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
155 int priority)
156 {
157 }
158
159 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
160 int priority)
161 {
162 }
163
164 static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
165 struct zone *zone, int priority)
166 {
167 return 0;
168 }
169
170 static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
171 struct zone *zone, int priority)
172 {
173 return 0;
174 }
175 #endif /* CONFIG_CGROUP_MEM_CONT */
176
177 #endif /* _LINUX_MEMCONTROL_H */
178
179
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