Linux kernel mirror (for testing)
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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 *
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
23struct mem_cgroup;
24struct page_cgroup;
25struct page;
26struct mm_struct;
27
28#ifdef CONFIG_CGROUP_MEM_RES_CTLR
29
30extern void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p);
31extern void mm_free_cgroup(struct mm_struct *mm);
32
33#define page_reset_bad_cgroup(page) ((page)->page_cgroup = 0)
34
35extern struct page_cgroup *page_get_page_cgroup(struct page *page);
36extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
37 gfp_t gfp_mask);
38extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
39 gfp_t gfp_mask);
40extern void mem_cgroup_uncharge_page(struct page *page);
41extern void mem_cgroup_move_lists(struct page *page, bool active);
42extern 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);
48extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
49int 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
54extern int mem_cgroup_prepare_migration(struct page *page);
55extern void mem_cgroup_end_migration(struct page *page);
56extern void mem_cgroup_page_migration(struct page *page, struct page *newpage);
57
58/*
59 * For memory reclaim.
60 */
61extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
62extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
63
64extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
65extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
66 int priority);
67extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
68 int priority);
69
70extern long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
71 struct zone *zone, int priority);
72extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
73 struct zone *zone, int priority);
74
75#else /* CONFIG_CGROUP_MEM_RES_CTLR */
76static inline void mm_init_cgroup(struct mm_struct *mm,
77 struct task_struct *p)
78{
79}
80
81static inline void mm_free_cgroup(struct mm_struct *mm)
82{
83}
84
85static inline void page_reset_bad_cgroup(struct page *page)
86{
87}
88
89static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
90{
91 return NULL;
92}
93
94static inline int mem_cgroup_charge(struct page *page,
95 struct mm_struct *mm, gfp_t gfp_mask)
96{
97 return 0;
98}
99
100static inline int mem_cgroup_cache_charge(struct page *page,
101 struct mm_struct *mm, gfp_t gfp_mask)
102{
103 return 0;
104}
105
106static inline void mem_cgroup_uncharge_page(struct page *page)
107{
108}
109
110static inline void mem_cgroup_move_lists(struct page *page, bool active)
111{
112}
113
114static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
115{
116 return 1;
117}
118
119static inline int task_in_mem_cgroup(struct task_struct *task,
120 const struct mem_cgroup *mem)
121{
122 return 1;
123}
124
125static inline int mem_cgroup_prepare_migration(struct page *page)
126{
127 return 0;
128}
129
130static inline void mem_cgroup_end_migration(struct page *page)
131{
132}
133
134static inline void
135mem_cgroup_page_migration(struct page *page, struct page *newpage)
136{
137}
138
139static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
140{
141 return 0;
142}
143
144static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
145{
146 return 0;
147}
148
149static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
150{
151 return 0;
152}
153
154static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
155 int priority)
156{
157}
158
159static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
160 int priority)
161{
162}
163
164static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
165 struct zone *zone, int priority)
166{
167 return 0;
168}
169
170static 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