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Linux kernel mirror (for testing)
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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
23#include <linux/rcupdate.h>
24#include <linux/mm.h>
25
26struct mem_cgroup;
27struct page_cgroup;
28struct page;
29struct mm_struct;
30
31#ifdef CONFIG_CGROUP_MEM_CONT
32
33extern void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p);
34extern void mm_free_cgroup(struct mm_struct *mm);
35extern void page_assign_page_cgroup(struct page *page,
36 struct page_cgroup *pc);
37extern struct page_cgroup *page_get_page_cgroup(struct page *page);
38extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
39 gfp_t gfp_mask);
40extern void mem_cgroup_uncharge(struct page_cgroup *pc);
41extern void mem_cgroup_uncharge_page(struct page *page);
42extern void mem_cgroup_move_lists(struct page_cgroup *pc, bool active);
43extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
44 struct list_head *dst,
45 unsigned long *scanned, int order,
46 int mode, struct zone *z,
47 struct mem_cgroup *mem_cont,
48 int active);
49extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
50extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
51 gfp_t gfp_mask);
52int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
53
54#define vm_match_cgroup(mm, cgroup) \
55 ((cgroup) == rcu_dereference((mm)->mem_cgroup))
56
57extern int mem_cgroup_prepare_migration(struct page *page);
58extern void mem_cgroup_end_migration(struct page *page);
59extern void mem_cgroup_page_migration(struct page *page, struct page *newpage);
60
61/*
62 * For memory reclaim.
63 */
64extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
65extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
66
67extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
68extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
69 int priority);
70extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
71 int priority);
72
73extern long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
74 struct zone *zone, int priority);
75extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
76 struct zone *zone, int priority);
77
78#else /* CONFIG_CGROUP_MEM_CONT */
79static inline void mm_init_cgroup(struct mm_struct *mm,
80 struct task_struct *p)
81{
82}
83
84static inline void mm_free_cgroup(struct mm_struct *mm)
85{
86}
87
88static inline void page_assign_page_cgroup(struct page *page,
89 struct page_cgroup *pc)
90{
91}
92
93static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
94{
95 return NULL;
96}
97
98static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
99 gfp_t gfp_mask)
100{
101 return 0;
102}
103
104static inline void mem_cgroup_uncharge(struct page_cgroup *pc)
105{
106}
107
108static inline void mem_cgroup_uncharge_page(struct page *page)
109{
110}
111
112static inline void mem_cgroup_move_lists(struct page_cgroup *pc,
113 bool active)
114{
115}
116
117static inline int mem_cgroup_cache_charge(struct page *page,
118 struct mm_struct *mm,
119 gfp_t gfp_mask)
120{
121 return 0;
122}
123
124static inline int vm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
125{
126 return 1;
127}
128
129static inline int task_in_mem_cgroup(struct task_struct *task,
130 const struct mem_cgroup *mem)
131{
132 return 1;
133}
134
135static inline int mem_cgroup_prepare_migration(struct page *page)
136{
137 return 0;
138}
139
140static inline void mem_cgroup_end_migration(struct page *page)
141{
142}
143
144static inline void
145mem_cgroup_page_migration(struct page *page, struct page *newpage)
146{
147}
148
149static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
150{
151 return 0;
152}
153
154static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
155{
156 return 0;
157}
158
159static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
160{
161 return 0;
162}
163
164static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
165 int priority)
166{
167}
168
169static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
170 int priority)
171{
172}
173
174static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
175 struct zone *zone, int priority)
176{
177 return 0;
178}
179
180static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
181 struct zone *zone, int priority)
182{
183 return 0;
184}
185#endif /* CONFIG_CGROUP_MEM_CONT */
186
187#endif /* _LINUX_MEMCONTROL_H */
188