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 int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
31 gfp_t gfp_mask);
32extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
33 gfp_t gfp_mask);
34extern void mem_cgroup_move_lists(struct page *page, enum lru_list lru);
35extern void mem_cgroup_uncharge_page(struct page *page);
36extern void mem_cgroup_uncharge_cache_page(struct page *page);
37extern int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask);
38
39extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
40 struct list_head *dst,
41 unsigned long *scanned, int order,
42 int mode, struct zone *z,
43 struct mem_cgroup *mem_cont,
44 int active, int file);
45extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
46int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
47
48extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
49
50#define mm_match_cgroup(mm, cgroup) \
51 ((cgroup) == mem_cgroup_from_task((mm)->owner))
52
53extern int
54mem_cgroup_prepare_migration(struct page *page, struct page *newpage);
55extern void mem_cgroup_end_migration(struct page *page);
56
57/*
58 * For memory reclaim.
59 */
60extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
61extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
62
63extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
64extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
65 int priority);
66extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
67 int priority);
68
69extern long mem_cgroup_calc_reclaim(struct mem_cgroup *mem, struct zone *zone,
70 int priority, enum lru_list lru);
71
72
73#else /* CONFIG_CGROUP_MEM_RES_CTLR */
74static inline int mem_cgroup_charge(struct page *page,
75 struct mm_struct *mm, gfp_t gfp_mask)
76{
77 return 0;
78}
79
80static inline int mem_cgroup_cache_charge(struct page *page,
81 struct mm_struct *mm, gfp_t gfp_mask)
82{
83 return 0;
84}
85
86static inline void mem_cgroup_uncharge_page(struct page *page)
87{
88}
89
90static inline void mem_cgroup_uncharge_cache_page(struct page *page)
91{
92}
93
94static inline int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask)
95{
96 return 0;
97}
98
99static inline void mem_cgroup_move_lists(struct page *page, bool active)
100{
101}
102
103static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
104{
105 return 1;
106}
107
108static inline int task_in_mem_cgroup(struct task_struct *task,
109 const struct mem_cgroup *mem)
110{
111 return 1;
112}
113
114static inline int
115mem_cgroup_prepare_migration(struct page *page, struct page *newpage)
116{
117 return 0;
118}
119
120static inline void mem_cgroup_end_migration(struct page *page)
121{
122}
123
124static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
125{
126 return 0;
127}
128
129static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
130{
131 return 0;
132}
133
134static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
135{
136 return 0;
137}
138
139static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
140 int priority)
141{
142}
143
144static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
145 int priority)
146{
147}
148
149static inline long mem_cgroup_calc_reclaim(struct mem_cgroup *mem,
150 struct zone *zone, int priority,
151 enum lru_list lru)
152{
153 return 0;
154}
155#endif /* CONFIG_CGROUP_MEM_CONT */
156
157#endif /* _LINUX_MEMCONTROL_H */
158