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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_CONT
29
30extern void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p);
31extern void mm_free_cgroup(struct mm_struct *mm);
32extern void page_assign_page_cgroup(struct page *page,
33 struct page_cgroup *pc);
34extern struct page_cgroup *page_get_page_cgroup(struct page *page);
35extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
36 gfp_t gfp_mask);
37extern void mem_cgroup_uncharge(struct page_cgroup *pc);
38extern void mem_cgroup_uncharge_page(struct page *page);
39extern void mem_cgroup_move_lists(struct page_cgroup *pc, bool active);
40extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
41 struct list_head *dst,
42 unsigned long *scanned, int order,
43 int mode, struct zone *z,
44 struct mem_cgroup *mem_cont,
45 int active);
46extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
47extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
48 gfp_t gfp_mask);
49int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
50
51#define vm_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_CONT */
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_assign_page_cgroup(struct page *page,
86 struct page_cgroup *pc)
87{
88}
89
90static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
91{
92 return NULL;
93}
94
95static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
96 gfp_t gfp_mask)
97{
98 return 0;
99}
100
101static inline void mem_cgroup_uncharge(struct page_cgroup *pc)
102{
103}
104
105static inline void mem_cgroup_uncharge_page(struct page *page)
106{
107}
108
109static inline void mem_cgroup_move_lists(struct page_cgroup *pc,
110 bool active)
111{
112}
113
114static inline int mem_cgroup_cache_charge(struct page *page,
115 struct mm_struct *mm,
116 gfp_t gfp_mask)
117{
118 return 0;
119}
120
121static inline int vm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
122{
123 return 1;
124}
125
126static inline int task_in_mem_cgroup(struct task_struct *task,
127 const struct mem_cgroup *mem)
128{
129 return 1;
130}
131
132static inline int mem_cgroup_prepare_migration(struct page *page)
133{
134 return 0;
135}
136
137static inline void mem_cgroup_end_migration(struct page *page)
138{
139}
140
141static inline void
142mem_cgroup_page_migration(struct page *page, struct page *newpage)
143{
144}
145
146static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
147{
148 return 0;
149}
150
151static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
152{
153 return 0;
154}
155
156static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
157{
158 return 0;
159}
160
161static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
162 int priority)
163{
164}
165
166static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
167 int priority)
168{
169}
170
171static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
172 struct zone *zone, int priority)
173{
174 return 0;
175}
176
177static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
178 struct zone *zone, int priority)
179{
180 return 0;
181}
182#endif /* CONFIG_CGROUP_MEM_CONT */
183
184#endif /* _LINUX_MEMCONTROL_H */
185