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
30#define page_reset_bad_cgroup(page) ((page)->page_cgroup = 0)
31
32extern struct page_cgroup *page_get_page_cgroup(struct page *page);
33extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
34 gfp_t gfp_mask);
35extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
36 gfp_t gfp_mask);
37extern void mem_cgroup_uncharge_page(struct page *page);
38extern void mem_cgroup_move_lists(struct page *page, bool active);
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);
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 mem_cgroup_prepare_migration(struct page *page);
54extern void mem_cgroup_end_migration(struct page *page);
55extern void mem_cgroup_page_migration(struct page *page, struct page *newpage);
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_active(struct mem_cgroup *mem,
70 struct zone *zone, int priority);
71extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
72 struct zone *zone, int priority);
73
74#else /* CONFIG_CGROUP_MEM_RES_CTLR */
75static inline void page_reset_bad_cgroup(struct page *page)
76{
77}
78
79static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
80{
81 return NULL;
82}
83
84static inline int mem_cgroup_charge(struct page *page,
85 struct mm_struct *mm, gfp_t gfp_mask)
86{
87 return 0;
88}
89
90static inline int mem_cgroup_cache_charge(struct page *page,
91 struct mm_struct *mm, gfp_t gfp_mask)
92{
93 return 0;
94}
95
96static inline void mem_cgroup_uncharge_page(struct page *page)
97{
98}
99
100static inline void mem_cgroup_move_lists(struct page *page, bool active)
101{
102}
103
104static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
105{
106 return 1;
107}
108
109static inline int task_in_mem_cgroup(struct task_struct *task,
110 const struct mem_cgroup *mem)
111{
112 return 1;
113}
114
115static inline int mem_cgroup_prepare_migration(struct page *page)
116{
117 return 0;
118}
119
120static inline void mem_cgroup_end_migration(struct page *page)
121{
122}
123
124static inline void
125mem_cgroup_page_migration(struct page *page, struct page *newpage)
126{
127}
128
129static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
130{
131 return 0;
132}
133
134static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
135{
136 return 0;
137}
138
139static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
140{
141 return 0;
142}
143
144static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
145 int priority)
146{
147}
148
149static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
150 int priority)
151{
152}
153
154static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
155 struct zone *zone, int priority)
156{
157 return 0;
158}
159
160static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
161 struct zone *zone, int priority)
162{
163 return 0;
164}
165#endif /* CONFIG_CGROUP_MEM_CONT */
166
167#endif /* _LINUX_MEMCONTROL_H */
168