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_lru_add_list(struct zone
*, struct page
*,
68 void mem_cgroup_lru_del_list(struct page
*, enum lru_list
);
69 void mem_cgroup_lru_del(struct page
*);
70 struct lruvec
*mem_cgroup_lru_move_lists(struct zone
*, struct page
*,
71 enum lru_list
, enum lru_list
);
73 /* For coalescing uncharge for reducing memcg' overhead*/
74 extern void mem_cgroup_uncharge_start(void);
75 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
);
80 extern void mem_cgroup_out_of_memory(struct mem_cgroup
*memcg
, gfp_t gfp_mask
,
82 int task_in_mem_cgroup(struct task_struct
*task
, const struct mem_cgroup
*memcg
);
84 extern struct mem_cgroup
*try_get_mem_cgroup_from_page(struct page
*page
);
85 extern struct mem_cgroup
*mem_cgroup_from_task(struct task_struct
*p
);
86 extern struct mem_cgroup
*try_get_mem_cgroup_from_mm(struct mm_struct
*mm
);
88 extern struct mem_cgroup
*parent_mem_cgroup(struct mem_cgroup
*memcg
);
89 extern struct mem_cgroup
*mem_cgroup_from_cont(struct cgroup
*cont
);
92 int mm_match_cgroup(const struct mm_struct
*mm
, const struct mem_cgroup
*cgroup
)
94 struct mem_cgroup
*memcg
;
96 memcg
= mem_cgroup_from_task(rcu_dereference((mm
)->owner
));
98 return 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 mem_cgroup
*memcg
,
119 int mem_cgroup_inactive_file_is_low(struct mem_cgroup
*memcg
,
121 int mem_cgroup_select_victim_node(struct mem_cgroup
*memcg
);
122 unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup
*memcg
,
123 int nid
, int zid
, unsigned int lrumask
);
124 struct zone_reclaim_stat
*mem_cgroup_get_reclaim_stat(struct mem_cgroup
*memcg
,
126 struct zone_reclaim_stat
*
127 mem_cgroup_get_reclaim_stat_from_page(struct page
*page
);
128 extern void mem_cgroup_print_oom_info(struct mem_cgroup
*memcg
,
129 struct task_struct
*p
);
130 extern void mem_cgroup_replace_page_cache(struct page
*oldpage
,
131 struct page
*newpage
);
133 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
134 extern int do_swap_account
;
137 static inline bool mem_cgroup_disabled(void)
139 if (mem_cgroup_subsys
.disabled
)
144 void __mem_cgroup_begin_update_page_stat(struct page
*page
, bool *locked
,
145 unsigned long *flags
);
147 extern atomic_t memcg_moving
;
149 static inline void mem_cgroup_begin_update_page_stat(struct page
*page
,
150 bool *locked
, unsigned long *flags
)
152 if (mem_cgroup_disabled())
156 if (atomic_read(&memcg_moving
))
157 __mem_cgroup_begin_update_page_stat(page
, locked
, flags
);
160 void __mem_cgroup_end_update_page_stat(struct page
*page
,
161 unsigned long *flags
);
162 static inline void mem_cgroup_end_update_page_stat(struct page
*page
,
163 bool *locked
, unsigned long *flags
)
165 if (mem_cgroup_disabled())
168 __mem_cgroup_end_update_page_stat(page
, flags
);
172 void mem_cgroup_update_page_stat(struct page
*page
,
173 enum mem_cgroup_page_stat_item idx
,
176 static inline void mem_cgroup_inc_page_stat(struct page
*page
,
177 enum mem_cgroup_page_stat_item idx
)
179 mem_cgroup_update_page_stat(page
, idx
, 1);
182 static inline void mem_cgroup_dec_page_stat(struct page
*page
,
183 enum mem_cgroup_page_stat_item idx
)
185 mem_cgroup_update_page_stat(page
, idx
, -1);
188 unsigned long mem_cgroup_soft_limit_reclaim(struct zone
*zone
, int order
,
190 unsigned long *total_scanned
);
191 u64
mem_cgroup_get_limit(struct mem_cgroup
*memcg
);
193 void mem_cgroup_count_vm_event(struct mm_struct
*mm
, enum vm_event_item idx
);
194 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
195 void mem_cgroup_split_huge_fixup(struct page
*head
);
198 #ifdef CONFIG_DEBUG_VM
199 bool mem_cgroup_bad_page_check(struct page
*page
);
200 void mem_cgroup_print_bad_page(struct page
*page
);
202 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
205 static inline int mem_cgroup_newpage_charge(struct page
*page
,
206 struct mm_struct
*mm
, gfp_t gfp_mask
)
211 static inline int mem_cgroup_cache_charge(struct page
*page
,
212 struct mm_struct
*mm
, gfp_t gfp_mask
)
217 static inline int mem_cgroup_try_charge_swapin(struct mm_struct
*mm
,
218 struct page
*page
, gfp_t gfp_mask
, struct mem_cgroup
**memcgp
)
223 static inline void mem_cgroup_commit_charge_swapin(struct page
*page
,
224 struct mem_cgroup
*memcg
)
228 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup
*memcg
)
232 static inline void mem_cgroup_uncharge_start(void)
236 static inline void mem_cgroup_uncharge_end(void)
240 static inline void mem_cgroup_uncharge_page(struct page
*page
)
244 static inline void mem_cgroup_uncharge_cache_page(struct page
*page
)
248 static inline struct lruvec
*mem_cgroup_zone_lruvec(struct zone
*zone
,
249 struct mem_cgroup
*memcg
)
251 return &zone
->lruvec
;
254 static inline struct lruvec
*mem_cgroup_lru_add_list(struct zone
*zone
,
258 return &zone
->lruvec
;
261 static inline void mem_cgroup_lru_del_list(struct page
*page
, enum lru_list lru
)
265 static inline void mem_cgroup_lru_del(struct page
*page
)
269 static inline struct lruvec
*mem_cgroup_lru_move_lists(struct zone
*zone
,
274 return &zone
->lruvec
;
277 static inline struct mem_cgroup
*try_get_mem_cgroup_from_page(struct page
*page
)
282 static inline struct mem_cgroup
*try_get_mem_cgroup_from_mm(struct mm_struct
*mm
)
287 static inline int mm_match_cgroup(struct mm_struct
*mm
,
288 struct mem_cgroup
*memcg
)
293 static inline int task_in_mem_cgroup(struct task_struct
*task
,
294 const struct mem_cgroup
*memcg
)
299 static inline struct cgroup_subsys_state
300 *mem_cgroup_css(struct mem_cgroup
*memcg
)
306 mem_cgroup_prepare_migration(struct page
*page
, struct page
*newpage
,
307 struct mem_cgroup
**memcgp
, gfp_t gfp_mask
)
312 static inline void mem_cgroup_end_migration(struct mem_cgroup
*memcg
,
313 struct page
*oldpage
, struct page
*newpage
, bool migration_ok
)
317 static inline struct mem_cgroup
*
318 mem_cgroup_iter(struct mem_cgroup
*root
,
319 struct mem_cgroup
*prev
,
320 struct mem_cgroup_reclaim_cookie
*reclaim
)
325 static inline void mem_cgroup_iter_break(struct mem_cgroup
*root
,
326 struct mem_cgroup
*prev
)
330 static inline bool mem_cgroup_disabled(void)
336 mem_cgroup_inactive_anon_is_low(struct mem_cgroup
*memcg
, struct zone
*zone
)
342 mem_cgroup_inactive_file_is_low(struct mem_cgroup
*memcg
, struct zone
*zone
)
347 static inline unsigned long
348 mem_cgroup_zone_nr_lru_pages(struct mem_cgroup
*memcg
, int nid
, int zid
,
349 unsigned int lru_mask
)
355 static inline struct zone_reclaim_stat
*
356 mem_cgroup_get_reclaim_stat(struct mem_cgroup
*memcg
, struct zone
*zone
)
361 static inline struct zone_reclaim_stat
*
362 mem_cgroup_get_reclaim_stat_from_page(struct page
*page
)
368 mem_cgroup_print_oom_info(struct mem_cgroup
*memcg
, struct task_struct
*p
)
372 static inline void mem_cgroup_begin_update_page_stat(struct page
*page
,
373 bool *locked
, unsigned long *flags
)
377 static inline void mem_cgroup_end_update_page_stat(struct page
*page
,
378 bool *locked
, unsigned long *flags
)
382 static inline void mem_cgroup_inc_page_stat(struct page
*page
,
383 enum mem_cgroup_page_stat_item idx
)
387 static inline void mem_cgroup_dec_page_stat(struct page
*page
,
388 enum mem_cgroup_page_stat_item idx
)
393 unsigned long mem_cgroup_soft_limit_reclaim(struct zone
*zone
, int order
,
395 unsigned long *total_scanned
)
401 u64
mem_cgroup_get_limit(struct mem_cgroup
*memcg
)
406 static inline void mem_cgroup_split_huge_fixup(struct page
*head
)
411 void mem_cgroup_count_vm_event(struct mm_struct
*mm
, enum vm_event_item idx
)
414 static inline void mem_cgroup_replace_page_cache(struct page
*oldpage
,
415 struct page
*newpage
)
418 #endif /* CONFIG_CGROUP_MEM_RES_CTLR */
420 #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM)
422 mem_cgroup_bad_page_check(struct page
*page
)
428 mem_cgroup_print_bad_page(struct page
*page
)
440 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM
441 void sock_update_memcg(struct sock
*sk
);
442 void sock_release_memcg(struct sock
*sk
);
444 static inline void sock_update_memcg(struct sock
*sk
)
447 static inline void sock_release_memcg(struct sock
*sk
)
450 #endif /* CONFIG_CGROUP_MEM_RES_CTLR_KMEM */
451 #endif /* _LINUX_MEMCONTROL_H */