Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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_uncharge_cache_page(struct page *page);
39extern void mem_cgroup_move_lists(struct page *page, bool active);
40extern int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask);
41
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
51extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
52
53#define mm_match_cgroup(mm, cgroup) \
54 ((cgroup) == mem_cgroup_from_task((mm)->owner))
55
56extern int
57mem_cgroup_prepare_migration(struct page *page, struct page *newpage);
58extern void mem_cgroup_end_migration(struct page *page);
59
60/*
61 * For memory reclaim.
62 */
63extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
64extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
65
66extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
67extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
68 int priority);
69extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
70 int priority);
71
72extern long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
73 struct zone *zone, int priority);
74extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
75 struct zone *zone, int priority);
76
77#else /* CONFIG_CGROUP_MEM_RES_CTLR */
78static inline void page_reset_bad_cgroup(struct page *page)
79{
80}
81
82static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
83{
84 return NULL;
85}
86
87static inline int mem_cgroup_charge(struct page *page,
88 struct mm_struct *mm, gfp_t gfp_mask)
89{
90 return 0;
91}
92
93static inline int mem_cgroup_cache_charge(struct page *page,
94 struct mm_struct *mm, gfp_t gfp_mask)
95{
96 return 0;
97}
98
99static inline void mem_cgroup_uncharge_page(struct page *page)
100{
101}
102
103static inline void mem_cgroup_uncharge_cache_page(struct page *page)
104{
105}
106
107static inline int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask)
108{
109 return 0;
110}
111
112static inline void mem_cgroup_move_lists(struct page *page, bool active)
113{
114}
115
116static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
117{
118 return 1;
119}
120
121static inline int task_in_mem_cgroup(struct task_struct *task,
122 const struct mem_cgroup *mem)
123{
124 return 1;
125}
126
127static inline int
128mem_cgroup_prepare_migration(struct page *page, struct page *newpage)
129{
130 return 0;
131}
132
133static inline void mem_cgroup_end_migration(struct page *page)
134{
135}
136
137static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
138{
139 return 0;
140}
141
142static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
143{
144 return 0;
145}
146
147static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
148{
149 return 0;
150}
151
152static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
153 int priority)
154{
155}
156
157static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
158 int priority)
159{
160}
161
162static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
163 struct zone *zone, int priority)
164{
165 return 0;
166}
167
168static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
169 struct zone *zone, int priority)
170{
171 return 0;
172}
173#endif /* CONFIG_CGROUP_MEM_CONT */
174
175#endif /* _LINUX_MEMCONTROL_H */
176