memcontrol.h 9.6 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 29 30 31 32
/* Stats that can be updated by kernel. */
enum mem_cgroup_page_stat_item {
	MEMCG_NR_FILE_MAPPED, /* # of pages charged as file rss */
};

33 34 35 36 37 38 39
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,
					int active, int file);

40
#ifdef CONFIG_CGROUP_MEM_RES_CTLR
K
KAMEZAWA Hiroyuki 已提交
41 42 43 44 45 46 47 48 49 50
/*
 * 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.)
 */
51

52
extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
53
				gfp_t gfp_mask);
54
/* for swap handling */
55 56
extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
		struct page *page, gfp_t mask, struct mem_cgroup **ptr);
57 58 59 60
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
61 62
extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
					gfp_t gfp_mask);
K
KAMEZAWA Hiroyuki 已提交
63 64
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);
65
extern void mem_cgroup_rotate_reclaimable_page(struct page *page);
K
KAMEZAWA Hiroyuki 已提交
66 67 68 69
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);
70 71 72 73 74

/* For coalescing uncharge for reducing memcg' overhead*/
extern void mem_cgroup_uncharge_start(void);
extern void mem_cgroup_uncharge_end(void);

75
extern void mem_cgroup_uncharge_page(struct page *page);
76
extern void mem_cgroup_uncharge_cache_page(struct page *page);
77
extern int mem_cgroup_shmem_charge_fallback(struct page *page,
78
			struct mm_struct *mm, gfp_t gfp_mask);
79

80
extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
81
int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
82

83
extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page);
84 85
extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);

86 87 88 89 90
static inline
int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
{
	struct mem_cgroup *mem;
	rcu_read_lock();
91
	mem = mem_cgroup_from_task(rcu_dereference((mm)->owner));
92 93 94
	rcu_read_unlock();
	return cgroup == mem;
}
95

96 97
extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem);

98
extern int
99
mem_cgroup_prepare_migration(struct page *page,
100
	struct page *newpage, struct mem_cgroup **ptr, gfp_t gfp_mask);
101
extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
102
	struct page *oldpage, struct page *newpage, bool migration_ok);
103

104 105 106
/*
 * For memory reclaim.
 */
107
int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg);
108
int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg);
109
int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
110 111 112
unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg,
				       struct zone *zone,
				       enum lru_list lru);
K
KOSAKI Motohiro 已提交
113 114 115 116
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);
117 118
extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
					struct task_struct *p);
119

120 121 122
#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
extern int do_swap_account;
#endif
123 124 125 126 127 128 129 130

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

131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146
void mem_cgroup_update_page_stat(struct page *page,
				 enum mem_cgroup_page_stat_item idx,
				 int val);

static inline void mem_cgroup_inc_page_stat(struct page *page,
					    enum mem_cgroup_page_stat_item idx)
{
	mem_cgroup_update_page_stat(page, idx, 1);
}

static inline void mem_cgroup_dec_page_stat(struct page *page,
					    enum mem_cgroup_page_stat_item idx)
{
	mem_cgroup_update_page_stat(page, idx, -1);
}

147
unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
148 149
						gfp_t gfp_mask,
						unsigned long *total_scanned);
D
David Rientjes 已提交
150 151
u64 mem_cgroup_get_limit(struct mem_cgroup *mem);

152 153 154 155
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
void mem_cgroup_split_huge_fixup(struct page *head, struct page *tail);
#endif

156 157 158 159
#ifdef CONFIG_DEBUG_VM
bool mem_cgroup_bad_page_check(struct page *page);
void mem_cgroup_print_bad_page(struct page *page);
#endif
160
#else /* CONFIG_CGROUP_MEM_RES_CTLR */
161 162 163
struct mem_cgroup;

static inline int mem_cgroup_newpage_charge(struct page *page,
H
Hugh Dickins 已提交
164
					struct mm_struct *mm, gfp_t gfp_mask)
165 166 167 168
{
	return 0;
}

H
Hugh Dickins 已提交
169 170
static inline int mem_cgroup_cache_charge(struct page *page,
					struct mm_struct *mm, gfp_t gfp_mask)
171
{
H
Hugh Dickins 已提交
172
	return 0;
173 174
}

175 176
static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
		struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr)
177 178 179 180 181 182 183 184 185 186 187 188 189
{
	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)
{
}

190 191 192 193 194 195 196 197
static inline void mem_cgroup_uncharge_start(void)
{
}

static inline void mem_cgroup_uncharge_end(void)
{
}

198 199 200 201
static inline void mem_cgroup_uncharge_page(struct page *page)
{
}

202 203 204 205
static inline void mem_cgroup_uncharge_cache_page(struct page *page)
{
}

206
static inline int mem_cgroup_shmem_charge_fallback(struct page *page,
207
			struct mm_struct *mm, gfp_t gfp_mask)
208 209 210 211
{
	return 0;
}

K
KAMEZAWA Hiroyuki 已提交
212 213 214 215 216 217 218 219 220
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 ;
}

221
static inline void mem_cgroup_rotate_reclaimable_page(struct page *page)
222 223 224 225
{
	return ;
}

K
KAMEZAWA Hiroyuki 已提交
226 227 228 229 230 231 232 233 234 235 236 237
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)
238 239 240
{
}

241 242 243 244 245
static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
{
	return NULL;
}

246
static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
247
{
248
	return 1;
249 250
}

251 252 253 254 255 256
static inline int task_in_mem_cgroup(struct task_struct *task,
				     const struct mem_cgroup *mem)
{
	return 1;
}

257 258 259 260 261
static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem)
{
	return NULL;
}

262
static inline int
263
mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
264
	struct mem_cgroup **ptr, gfp_t gfp_mask)
265 266 267 268
{
	return 0;
}

269
static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
270
		struct page *oldpage, struct page *newpage, bool migration_ok)
271 272 273
{
}

274 275 276 277 278 279 280 281 282 283 284 285 286 287 288
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)
{
}

289 290 291 292
static inline bool mem_cgroup_disabled(void)
{
	return true;
}
293

294
static inline int
295
mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg)
296 297 298 299
{
	return 1;
}

300 301 302 303 304 305
static inline int
mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg)
{
	return 1;
}

306 307 308 309 310 311 312 313
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
314 315 316 317 318 319 320 321 322 323 324 325
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;
}

326 327 328 329 330
static inline void
mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
{
}

331 332 333 334 335 336 337
static inline void mem_cgroup_inc_page_stat(struct page *page,
					    enum mem_cgroup_page_stat_item idx)
{
}

static inline void mem_cgroup_dec_page_stat(struct page *page,
					    enum mem_cgroup_page_stat_item idx)
338 339 340
{
}

341 342
static inline
unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
343 344
					    gfp_t gfp_mask,
					    unsigned long *total_scanned)
345 346 347 348
{
	return 0;
}

D
David Rientjes 已提交
349 350 351 352 353 354
static inline
u64 mem_cgroup_get_limit(struct mem_cgroup *mem)
{
	return 0;
}

355 356 357 358 359
static inline void mem_cgroup_split_huge_fixup(struct page *head,
						struct page *tail)
{
}

360 361
#endif /* CONFIG_CGROUP_MEM_CONT */

362 363 364 365 366 367 368 369 370 371 372 373 374
#if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM)
static inline bool
mem_cgroup_bad_page_check(struct page *page)
{
	return false;
}

static inline void
mem_cgroup_print_bad_page(struct page *page)
{
}
#endif

B
Balbir Singh 已提交
375 376
#endif /* _LINUX_MEMCONTROL_H */