1 /* memcontrol.h - Memory Controller
3 * Copyright IBM Corporation, 2007
4 * Author Balbir Singh <balbir@linux.vnet.ibm.com>
6 * Copyright 2007 OpenVZ SWsoft Inc
7 * Author: Pavel Emelianov <xemul@openvz.org>
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.
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.
20 #ifndef _LINUX_MEMCONTROL_H
21 #define _LINUX_MEMCONTROL_H
22 #include <linux/cgroup.h>
23 #include <linux/vm_event_item.h>
30 /* Stats that can be updated by kernel. */
31 enum mem_cgroup_page_stat_item
{
32 MEMCG_NR_FILE_MAPPED
, /* # of pages charged as file rss */
35 struct mem_cgroup_reclaim_cookie
{
38 unsigned int generation
;
41 #ifdef CONFIG_CGROUP_MEM_RES_CTLR
43 * All "charge" functions with gfp_mask should use GFP_KERNEL or
44 * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't
45 * alloc memory but reclaims memory from all available zones. So, "where I want
46 * memory from" bits of gfp_mask has no meaning. So any bits of that field is
47 * available but adding a rule is better. charge functions' gfp_mask should
48 * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous
50 * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.)
53 extern int mem_cgroup_newpage_charge(struct page
*page
, struct mm_struct
*mm
,
55 /* for swap handling */
56 extern int mem_cgroup_try_charge_swapin(struct mm_struct
*mm
,
57 struct page
*page
, gfp_t mask
, struct mem_cgroup
**memcgp
);
58 extern void mem_cgroup_commit_charge_swapin(struct page
*page
,
59 struct mem_cgroup
*memcg
);
60 extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup
*memcg
);
62 extern int mem_cgroup_cache_charge(struct page
*page
, struct mm_struct
*mm
,
65 struct lruvec
*mem_cgroup_zone_lruvec(struct zone
*, struct mem_cgroup
*);
66 struct lruvec
*mem_cgroup_page_lruvec(struct page
*, struct zone
*);
68 /* For coalescing uncharge for reducing memcg' overhead*/
69 extern void mem_cgroup_uncharge_start(void);
70 extern void mem_cgroup_uncharge_end(void);
72 extern void mem_cgroup_uncharge_page(struct page
*page
);
73 extern void mem_cgroup_uncharge_cache_page(struct page
*page
);
75 extern void mem_cgroup_out_of_memory(struct mem_cgroup
*memcg
, gfp_t gfp_mask
,
77 bool __mem_cgroup_same_or_subtree(const struct mem_cgroup
*root_memcg
,
78 struct mem_cgroup
*memcg
);
79 int task_in_mem_cgroup(struct task_struct
*task
, const struct mem_cgroup
*memcg
);
81 extern struct mem_cgroup
*try_get_mem_cgroup_from_page(struct page
*page
);
82 extern struct mem_cgroup
*mem_cgroup_from_task(struct task_struct
*p
);
83 extern struct mem_cgroup
*try_get_mem_cgroup_from_mm(struct mm_struct
*mm
);
85 extern struct mem_cgroup
*parent_mem_cgroup(struct mem_cgroup
*memcg
);
86 extern struct mem_cgroup
*mem_cgroup_from_cont(struct cgroup
*cont
);
89 int mm_match_cgroup(const struct mm_struct
*mm
, const struct mem_cgroup
*cgroup
)
91 struct mem_cgroup
*memcg
;
95 memcg
= mem_cgroup_from_task(rcu_dereference((mm
)->owner
));
96 match
= __mem_cgroup_same_or_subtree(cgroup
, memcg
);
101 extern struct cgroup_subsys_state
*mem_cgroup_css(struct mem_cgroup
*memcg
);
104 mem_cgroup_prepare_migration(struct page
*page
,
105 struct page
*newpage
, struct mem_cgroup
**memcgp
, gfp_t gfp_mask
);
106 extern void mem_cgroup_end_migration(struct mem_cgroup
*memcg
,
107 struct page
*oldpage
, struct page
*newpage
, bool migration_ok
);
109 struct mem_cgroup
*mem_cgroup_iter(struct mem_cgroup
*,
111 struct mem_cgroup_reclaim_cookie
*);
112 void mem_cgroup_iter_break(struct mem_cgroup
*, struct mem_cgroup
*);
115 * For memory reclaim.
117 int mem_cgroup_inactive_anon_is_low(struct lruvec
*lruvec
);
118 int mem_cgroup_inactive_file_is_low(struct lruvec
*lruvec
);
119 int mem_cgroup_select_victim_node(struct mem_cgroup
*memcg
);
120 unsigned long mem_cgroup_get_lru_size(struct lruvec
*lruvec
, enum lru_list
);
121 void mem_cgroup_update_lru_size(struct lruvec
*, enum lru_list
, int);
122 extern void mem_cgroup_print_oom_info(struct mem_cgroup
*memcg
,
123 struct task_struct
*p
);
124 extern void mem_cgroup_replace_page_cache(struct page
*oldpage
,
125 struct page
*newpage
);
127 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
128 extern int do_swap_account
;
131 static inline bool mem_cgroup_disabled(void)
133 if (mem_cgroup_subsys
.disabled
)
138 void __mem_cgroup_begin_update_page_stat(struct page
*page
, bool *locked
,
139 unsigned long *flags
);
141 extern atomic_t memcg_moving
;
143 static inline void mem_cgroup_begin_update_page_stat(struct page
*page
,
144 bool *locked
, unsigned long *flags
)
146 if (mem_cgroup_disabled())
150 if (atomic_read(&memcg_moving
))
151 __mem_cgroup_begin_update_page_stat(page
, locked
, flags
);
154 void __mem_cgroup_end_update_page_stat(struct page
*page
,
155 unsigned long *flags
);
156 static inline void mem_cgroup_end_update_page_stat(struct page
*page
,
157 bool *locked
, unsigned long *flags
)
159 if (mem_cgroup_disabled())
162 __mem_cgroup_end_update_page_stat(page
, flags
);
166 void mem_cgroup_update_page_stat(struct page
*page
,
167 enum mem_cgroup_page_stat_item idx
,
170 static inline void mem_cgroup_inc_page_stat(struct page
*page
,
171 enum mem_cgroup_page_stat_item idx
)
173 mem_cgroup_update_page_stat(page
, idx
, 1);
176 static inline void mem_cgroup_dec_page_stat(struct page
*page
,
177 enum mem_cgroup_page_stat_item idx
)
179 mem_cgroup_update_page_stat(page
, idx
, -1);
182 unsigned long mem_cgroup_soft_limit_reclaim(struct zone
*zone
, int order
,
184 unsigned long *total_scanned
);
185 u64
mem_cgroup_get_limit(struct mem_cgroup
*memcg
);
187 void mem_cgroup_count_vm_event(struct mm_struct
*mm
, enum vm_event_item idx
);
188 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
189 void mem_cgroup_split_huge_fixup(struct page
*head
);
192 #ifdef CONFIG_DEBUG_VM
193 bool mem_cgroup_bad_page_check(struct page
*page
);
194 void mem_cgroup_print_bad_page(struct page
*page
);
196 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
199 static inline int mem_cgroup_newpage_charge(struct page
*page
,
200 struct mm_struct
*mm
, gfp_t gfp_mask
)
205 static inline int mem_cgroup_cache_charge(struct page
*page
,
206 struct mm_struct
*mm
, gfp_t gfp_mask
)
211 static inline int mem_cgroup_try_charge_swapin(struct mm_struct
*mm
,
212 struct page
*page
, gfp_t gfp_mask
, struct mem_cgroup
**memcgp
)
217 static inline void mem_cgroup_commit_charge_swapin(struct page
*page
,
218 struct mem_cgroup
*memcg
)
222 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup
*memcg
)
226 static inline void mem_cgroup_uncharge_start(void)
230 static inline void mem_cgroup_uncharge_end(void)
234 static inline void mem_cgroup_uncharge_page(struct page
*page
)
238 static inline void mem_cgroup_uncharge_cache_page(struct page
*page
)
242 static inline struct lruvec
*mem_cgroup_zone_lruvec(struct zone
*zone
,
243 struct mem_cgroup
*memcg
)
245 return &zone
->lruvec
;
248 static inline struct lruvec
*mem_cgroup_page_lruvec(struct page
*page
,
251 return &zone
->lruvec
;
254 static inline struct mem_cgroup
*try_get_mem_cgroup_from_page(struct page
*page
)
259 static inline struct mem_cgroup
*try_get_mem_cgroup_from_mm(struct mm_struct
*mm
)
264 static inline int mm_match_cgroup(struct mm_struct
*mm
,
265 struct mem_cgroup
*memcg
)
270 static inline int task_in_mem_cgroup(struct task_struct
*task
,
271 const struct mem_cgroup
*memcg
)
276 static inline struct cgroup_subsys_state
277 *mem_cgroup_css(struct mem_cgroup
*memcg
)
283 mem_cgroup_prepare_migration(struct page
*page
, struct page
*newpage
,
284 struct mem_cgroup
**memcgp
, gfp_t gfp_mask
)
289 static inline void mem_cgroup_end_migration(struct mem_cgroup
*memcg
,
290 struct page
*oldpage
, struct page
*newpage
, bool migration_ok
)
294 static inline struct mem_cgroup
*
295 mem_cgroup_iter(struct mem_cgroup
*root
,
296 struct mem_cgroup
*prev
,
297 struct mem_cgroup_reclaim_cookie
*reclaim
)
302 static inline void mem_cgroup_iter_break(struct mem_cgroup
*root
,
303 struct mem_cgroup
*prev
)
307 static inline bool mem_cgroup_disabled(void)
313 mem_cgroup_inactive_anon_is_low(struct lruvec
*lruvec
)
319 mem_cgroup_inactive_file_is_low(struct lruvec
*lruvec
)
324 static inline unsigned long
325 mem_cgroup_get_lru_size(struct lruvec
*lruvec
, enum lru_list lru
)
331 mem_cgroup_update_lru_size(struct lruvec
*lruvec
, enum lru_list lru
,
337 mem_cgroup_print_oom_info(struct mem_cgroup
*memcg
, struct task_struct
*p
)
341 static inline void mem_cgroup_begin_update_page_stat(struct page
*page
,
342 bool *locked
, unsigned long *flags
)
346 static inline void mem_cgroup_end_update_page_stat(struct page
*page
,
347 bool *locked
, unsigned long *flags
)
351 static inline void mem_cgroup_inc_page_stat(struct page
*page
,
352 enum mem_cgroup_page_stat_item idx
)
356 static inline void mem_cgroup_dec_page_stat(struct page
*page
,
357 enum mem_cgroup_page_stat_item idx
)
362 unsigned long mem_cgroup_soft_limit_reclaim(struct zone
*zone
, int order
,
364 unsigned long *total_scanned
)
370 u64
mem_cgroup_get_limit(struct mem_cgroup
*memcg
)
375 static inline void mem_cgroup_split_huge_fixup(struct page
*head
)
380 void mem_cgroup_count_vm_event(struct mm_struct
*mm
, enum vm_event_item idx
)
383 static inline void mem_cgroup_replace_page_cache(struct page
*oldpage
,
384 struct page
*newpage
)
387 #endif /* CONFIG_CGROUP_MEM_RES_CTLR */
389 #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM)
391 mem_cgroup_bad_page_check(struct page
*page
)
397 mem_cgroup_print_bad_page(struct page
*page
)
409 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM
410 void sock_update_memcg(struct sock
*sk
);
411 void sock_release_memcg(struct sock
*sk
);
413 static inline void sock_update_memcg(struct sock
*sk
)
416 static inline void sock_release_memcg(struct sock
*sk
)
419 #endif /* CONFIG_CGROUP_MEM_RES_CTLR_KMEM */
420 #endif /* _LINUX_MEMCONTROL_H */