memcontrol.h 7.7 KB
Newer Older
B
Balbir Singh 已提交
1 2 3 4 5
/* memcontrol.h - Memory Controller
 *
 * Copyright IBM Corporation, 2007
 * Author Balbir Singh <balbir@linux.vnet.ibm.com>
 *
6 7 8
 * Copyright 2007 OpenVZ SWsoft Inc
 * Author: Pavel Emelianov <xemul@openvz.org>
 *
B
Balbir Singh 已提交
9 10 11 12 13 14 15 16 17 18 19 20 21
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifndef _LINUX_MEMCONTROL_H
#define _LINUX_MEMCONTROL_H
22
#include <linux/cgroup.h>
23 24
struct mem_cgroup;
struct page_cgroup;
25 26
struct page;
struct mm_struct;
27

28
#ifdef CONFIG_CGROUP_MEM_RES_CTLR
K
KAMEZAWA Hiroyuki 已提交
29 30 31 32 33 34 35 36 37 38
/*
 * All "charge" functions with gfp_mask should use GFP_KERNEL or
 * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't
 * alloc memory but reclaims memory from all available zones. So, "where I want
 * memory from" bits of gfp_mask has no meaning. So any bits of that field is
 * available but adding a rule is better. charge functions' gfp_mask should
 * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous
 * codes.
 * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.)
 */
39

40
extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
41
				gfp_t gfp_mask);
42 43 44
/* for swap handling */
extern int mem_cgroup_try_charge(struct mm_struct *mm,
		gfp_t gfp_mask, struct mem_cgroup **ptr);
45 46
extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
		struct page *page, gfp_t mask, struct mem_cgroup **ptr);
47 48 49 50
extern void mem_cgroup_commit_charge_swapin(struct page *page,
					struct mem_cgroup *ptr);
extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr);

H
Hugh Dickins 已提交
51 52
extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
					gfp_t gfp_mask);
K
KAMEZAWA Hiroyuki 已提交
53 54 55 56 57 58
extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru);
extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru);
extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru);
extern void mem_cgroup_del_lru(struct page *page);
extern void mem_cgroup_move_lists(struct page *page,
				  enum lru_list from, enum lru_list to);
59
extern void mem_cgroup_uncharge_page(struct page *page);
60
extern void mem_cgroup_uncharge_cache_page(struct page *page);
61 62
extern int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask);

63 64 65 66 67
extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
					struct list_head *dst,
					unsigned long *scanned, int order,
					int mode, struct zone *z,
					struct mem_cgroup *mem_cont,
68
					int active, int file);
69
extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
70
int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
71

72 73
extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);

74 75 76 77 78 79 80 81 82
static inline
int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
{
	struct mem_cgroup *mem;
	rcu_read_lock();
	mem = mem_cgroup_from_task((mm)->owner);
	rcu_read_unlock();
	return cgroup == mem;
}
83

84
extern int
85 86 87
mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr);
extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
	struct page *oldpage, struct page *newpage);
88

89 90 91 92
/*
 * For memory reclaim.
 */
extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
93 94
extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);

95 96 97 98 99
extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
							int priority);
extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
							int priority);
100

101 102
extern long mem_cgroup_calc_reclaim(struct mem_cgroup *mem, struct zone *zone,
					int priority, enum lru_list lru);
103 104
int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg,
				    struct zone *zone);
105 106 107
unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg,
				       struct zone *zone,
				       enum lru_list lru);
K
KOSAKI Motohiro 已提交
108 109 110 111
struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg,
						      struct zone *zone);
struct zone_reclaim_stat*
mem_cgroup_get_reclaim_stat_from_page(struct page *page);
112

113 114 115
#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
extern int do_swap_account;
#endif
116 117 118 119 120 121 122 123

static inline bool mem_cgroup_disabled(void)
{
	if (mem_cgroup_subsys.disabled)
		return true;
	return false;
}

124 125
extern bool mem_cgroup_oom_called(struct task_struct *task);

126
#else /* CONFIG_CGROUP_MEM_RES_CTLR */
127 128 129
struct mem_cgroup;

static inline int mem_cgroup_newpage_charge(struct page *page,
H
Hugh Dickins 已提交
130
					struct mm_struct *mm, gfp_t gfp_mask)
131 132 133 134
{
	return 0;
}

H
Hugh Dickins 已提交
135 136
static inline int mem_cgroup_cache_charge(struct page *page,
					struct mm_struct *mm, gfp_t gfp_mask)
137
{
H
Hugh Dickins 已提交
138
	return 0;
139 140
}

141
static inline int mem_cgroup_try_charge(struct mm_struct *mm,
142 143 144 145 146 147 148
			gfp_t gfp_mask, struct mem_cgroup **ptr)
{
	return 0;
}

static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
		struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr)
149 150 151 152 153 154 155 156 157 158 159 160 161
{
	return 0;
}

static inline void mem_cgroup_commit_charge_swapin(struct page *page,
					  struct mem_cgroup *ptr)
{
}

static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr)
{
}

162 163 164 165
static inline void mem_cgroup_uncharge_page(struct page *page)
{
}

166 167 168 169
static inline void mem_cgroup_uncharge_cache_page(struct page *page)
{
}

170 171 172 173 174
static inline int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask)
{
	return 0;
}

K
KAMEZAWA Hiroyuki 已提交
175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195
static inline void mem_cgroup_add_lru_list(struct page *page, int lru)
{
}

static inline void mem_cgroup_del_lru_list(struct page *page, int lru)
{
	return ;
}

static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru)
{
	return ;
}

static inline void mem_cgroup_del_lru(struct page *page)
{
	return ;
}

static inline void
mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to)
196 197 198
{
}

199
static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
200
{
201
	return 1;
202 203
}

204 205 206 207 208 209
static inline int task_in_mem_cgroup(struct task_struct *task,
				     const struct mem_cgroup *mem)
{
	return 1;
}

210
static inline int
211
mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr)
212 213 214 215
{
	return 0;
}

216 217 218
static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
					struct page *oldpage,
					struct page *newpage)
219 220 221
{
}

222 223 224 225
static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
{
	return 0;
}
226 227 228 229 230 231

static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
{
	return 0;
}

232 233 234 235 236 237 238 239 240 241 242 243 244 245 246
static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
{
	return 0;
}

static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
						int priority)
{
}

static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
						int priority)
{
}

247 248 249
static inline long mem_cgroup_calc_reclaim(struct mem_cgroup *mem,
					struct zone *zone, int priority,
					enum lru_list lru)
250 251 252
{
	return 0;
}
253 254 255 256 257

static inline bool mem_cgroup_disabled(void)
{
	return true;
}
258 259 260 261 262

static inline bool mem_cgroup_oom_called(struct task_struct *task)
{
	return false;
}
263 264 265 266 267 268 269

static inline int
mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, struct zone *zone)
{
	return 1;
}

270 271 272 273 274 275 276 277
static inline unsigned long
mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone,
			 enum lru_list lru)
{
	return 0;
}


K
KOSAKI Motohiro 已提交
278 279 280 281 282 283 284 285 286 287 288 289
static inline struct zone_reclaim_stat*
mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone)
{
	return NULL;
}

static inline struct zone_reclaim_stat*
mem_cgroup_get_reclaim_stat_from_page(struct page *page)
{
	return NULL;
}

290 291
#endif /* CONFIG_CGROUP_MEM_CONT */

B
Balbir Singh 已提交
292 293
#endif /* _LINUX_MEMCONTROL_H */