memcontrol.h 10.9 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
#include <linux/vm_event_item.h>

25 26
struct mem_cgroup;
struct page_cgroup;
27 28
struct page;
struct mm_struct;
29

30 31 32 33 34
/* Stats that can be updated by kernel. */
enum mem_cgroup_page_stat_item {
	MEMCG_NR_FILE_MAPPED, /* # of pages charged as file rss */
};

35 36 37 38 39 40
struct mem_cgroup_reclaim_cookie {
	struct zone *zone;
	int priority;
	unsigned int generation;
};

41
#ifdef CONFIG_CGROUP_MEM_RES_CTLR
K
KAMEZAWA Hiroyuki 已提交
42 43 44 45 46 47 48 49 50 51
/*
 * 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.)
 */
52

53
extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
54
				gfp_t gfp_mask);
55
/* for swap handling */
56 57
extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
		struct page *page, gfp_t mask, struct mem_cgroup **ptr);
58 59 60 61
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
62 63
extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
					gfp_t gfp_mask);
64 65 66 67 68 69 70 71

struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *);
struct lruvec *mem_cgroup_lru_add_list(struct zone *, struct page *,
				       enum lru_list);
void mem_cgroup_lru_del_list(struct page *, enum lru_list);
void mem_cgroup_lru_del(struct page *);
struct lruvec *mem_cgroup_lru_move_lists(struct zone *, struct page *,
					 enum lru_list, enum lru_list);
72 73 74 75 76

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

77
extern void mem_cgroup_uncharge_page(struct page *page);
78
extern void mem_cgroup_uncharge_cache_page(struct page *page);
79

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

83
extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page);
84
extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
85
extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm);
86

G
Glauber Costa 已提交
87
extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg);
G
Glauber Costa 已提交
88
extern struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont);
G
Glauber Costa 已提交
89

90 91 92
static inline
int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
{
93
	struct mem_cgroup *memcg;
94
	rcu_read_lock();
95
	memcg = mem_cgroup_from_task(rcu_dereference((mm)->owner));
96
	rcu_read_unlock();
97
	return cgroup == memcg;
98
}
99

100
extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg);
101

102
extern int
103
mem_cgroup_prepare_migration(struct page *page,
104
	struct page *newpage, struct mem_cgroup **ptr, gfp_t gfp_mask);
105
extern void mem_cgroup_end_migration(struct mem_cgroup *memcg,
106
	struct page *oldpage, struct page *newpage, bool migration_ok);
107

108 109 110 111 112
struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *,
				   struct mem_cgroup *,
				   struct mem_cgroup_reclaim_cookie *);
void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *);

113 114 115
/*
 * For memory reclaim.
 */
116 117 118 119
int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg,
				    struct zone *zone);
int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg,
				    struct zone *zone);
120
int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
121
unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg,
122
					int nid, int zid, unsigned int lrumask);
K
KOSAKI Motohiro 已提交
123 124 125 126
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);
127 128
extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
					struct task_struct *p);
129 130
extern void mem_cgroup_replace_page_cache(struct page *oldpage,
					struct page *newpage);
131

132 133 134
#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
extern int do_swap_account;
#endif
135 136 137 138 139 140 141 142

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

143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158
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);
}

159
unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
160 161
						gfp_t gfp_mask,
						unsigned long *total_scanned);
162
u64 mem_cgroup_get_limit(struct mem_cgroup *memcg);
D
David Rientjes 已提交
163

164
void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx);
165 166 167 168
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
void mem_cgroup_split_huge_fixup(struct page *head, struct page *tail);
#endif

169 170 171 172
#ifdef CONFIG_DEBUG_VM
bool mem_cgroup_bad_page_check(struct page *page);
void mem_cgroup_print_bad_page(struct page *page);
#endif
173
#else /* CONFIG_CGROUP_MEM_RES_CTLR */
174 175 176
struct mem_cgroup;

static inline int mem_cgroup_newpage_charge(struct page *page,
H
Hugh Dickins 已提交
177
					struct mm_struct *mm, gfp_t gfp_mask)
178 179 180 181
{
	return 0;
}

H
Hugh Dickins 已提交
182 183
static inline int mem_cgroup_cache_charge(struct page *page,
					struct mm_struct *mm, gfp_t gfp_mask)
184
{
H
Hugh Dickins 已提交
185
	return 0;
186 187
}

188 189
static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
		struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr)
190 191 192 193 194 195 196 197 198 199 200 201 202
{
	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)
{
}

203 204 205 206 207 208 209 210
static inline void mem_cgroup_uncharge_start(void)
{
}

static inline void mem_cgroup_uncharge_end(void)
{
}

211 212 213 214
static inline void mem_cgroup_uncharge_page(struct page *page)
{
}

215 216 217 218
static inline void mem_cgroup_uncharge_cache_page(struct page *page)
{
}

219 220
static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone,
						    struct mem_cgroup *memcg)
K
KAMEZAWA Hiroyuki 已提交
221
{
222
	return &zone->lruvec;
K
KAMEZAWA Hiroyuki 已提交
223 224
}

225 226 227
static inline struct lruvec *mem_cgroup_lru_add_list(struct zone *zone,
						     struct page *page,
						     enum lru_list lru)
228
{
229
	return &zone->lruvec;
230 231
}

232
static inline void mem_cgroup_lru_del_list(struct page *page, enum lru_list lru)
K
KAMEZAWA Hiroyuki 已提交
233 234 235
{
}

236
static inline void mem_cgroup_lru_del(struct page *page)
K
KAMEZAWA Hiroyuki 已提交
237 238 239
{
}

240 241 242 243
static inline struct lruvec *mem_cgroup_lru_move_lists(struct zone *zone,
						       struct page *page,
						       enum lru_list from,
						       enum lru_list to)
244
{
245
	return &zone->lruvec;
246 247
}

248 249 250 251 252
static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
{
	return NULL;
}

253 254 255 256 257
static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm)
{
	return NULL;
}

258 259
static inline int mm_match_cgroup(struct mm_struct *mm,
		struct mem_cgroup *memcg)
260
{
261
	return 1;
262 263
}

264
static inline int task_in_mem_cgroup(struct task_struct *task,
265
				     const struct mem_cgroup *memcg)
266 267 268 269
{
	return 1;
}

270 271
static inline struct cgroup_subsys_state
		*mem_cgroup_css(struct mem_cgroup *memcg)
272 273 274 275
{
	return NULL;
}

276
static inline int
277
mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
278
	struct mem_cgroup **ptr, gfp_t gfp_mask)
279 280 281 282
{
	return 0;
}

283
static inline void mem_cgroup_end_migration(struct mem_cgroup *memcg,
284
		struct page *oldpage, struct page *newpage, bool migration_ok)
285 286 287
{
}

288 289 290 291 292 293 294 295 296 297 298 299 300
static inline struct mem_cgroup *
mem_cgroup_iter(struct mem_cgroup *root,
		struct mem_cgroup *prev,
		struct mem_cgroup_reclaim_cookie *reclaim)
{
	return NULL;
}

static inline void mem_cgroup_iter_break(struct mem_cgroup *root,
					 struct mem_cgroup *prev)
{
}

301
static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *memcg)
302 303 304 305
{
	return 0;
}

306
static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *memcg,
307 308 309 310
						int priority)
{
}

311
static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *memcg,
312 313 314 315
						int priority)
{
}

316 317 318 319
static inline bool mem_cgroup_disabled(void)
{
	return true;
}
320

321
static inline int
322
mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, struct zone *zone)
323 324 325 326
{
	return 1;
}

327
static inline int
328
mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg, struct zone *zone)
329 330 331 332
{
	return 1;
}

333
static inline unsigned long
334 335
mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, int nid, int zid,
				unsigned int lru_mask)
336 337 338 339 340
{
	return 0;
}


K
KOSAKI Motohiro 已提交
341 342 343 344 345 346 347 348 349 350 351 352
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;
}

353 354 355 356 357
static inline void
mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
{
}

358 359 360 361 362 363 364
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)
365 366 367
{
}

368 369
static inline
unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
370 371
					    gfp_t gfp_mask,
					    unsigned long *total_scanned)
372 373 374 375
{
	return 0;
}

D
David Rientjes 已提交
376
static inline
377
u64 mem_cgroup_get_limit(struct mem_cgroup *memcg)
D
David Rientjes 已提交
378 379 380 381
{
	return 0;
}

382 383 384 385 386
static inline void mem_cgroup_split_huge_fixup(struct page *head,
						struct page *tail)
{
}

387 388 389 390
static inline
void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
{
}
391 392 393 394
static inline void mem_cgroup_replace_page_cache(struct page *oldpage,
				struct page *newpage)
{
}
395 396
#endif /* CONFIG_CGROUP_MEM_CONT */

397 398 399 400 401 402 403 404 405 406 407 408 409
#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

G
Glauber Costa 已提交
410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427
enum {
	UNDER_LIMIT,
	SOFT_LIMIT,
	OVER_LIMIT,
};

struct sock;
#ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM
void sock_update_memcg(struct sock *sk);
void sock_release_memcg(struct sock *sk);
#else
static inline void sock_update_memcg(struct sock *sk)
{
}
static inline void sock_release_memcg(struct sock *sk)
{
}
#endif /* CONFIG_CGROUP_MEM_RES_CTLR_KMEM */
B
Balbir Singh 已提交
428 429
#endif /* _LINUX_MEMCONTROL_H */