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>
28 /* Stats that can be updated by kernel. */
29 enum mem_cgroup_page_stat_item {
30 MEMCG_NR_FILE_MAPPED, /* # of pages charged as file rss */
33 extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
34 struct list_head *dst,
35 unsigned long *scanned, int order,
36 int mode, struct zone *z,
37 struct mem_cgroup *mem_cont,
38 int active, int file);
40 #ifdef CONFIG_CGROUP_MEM_RES_CTLR
42 * All "charge" functions with gfp_mask should use GFP_KERNEL or
43 * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't
44 * alloc memory but reclaims memory from all available zones. So, "where I want
45 * memory from" bits of gfp_mask has no meaning. So any bits of that field is
46 * available but adding a rule is better. charge functions' gfp_mask should
47 * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous
49 * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.)
52 extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
54 /* for swap handling */
55 extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
56 struct page *page, gfp_t mask, struct mem_cgroup **ptr);
57 extern void mem_cgroup_commit_charge_swapin(struct page *page,
58 struct mem_cgroup *ptr);
59 extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr);
61 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
63 extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru);
64 extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru);
65 extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru);
66 extern void mem_cgroup_del_lru(struct page *page);
67 extern void mem_cgroup_move_lists(struct page *page,
68 enum lru_list from, enum lru_list to);
70 /* For coalescing uncharge for reducing memcg' overhead*/
71 extern void mem_cgroup_uncharge_start(void);
72 extern void mem_cgroup_uncharge_end(void);
74 extern void mem_cgroup_uncharge_page(struct page *page);
75 extern void mem_cgroup_uncharge_cache_page(struct page *page);
76 extern int mem_cgroup_shmem_charge_fallback(struct page *page,
77 struct mm_struct *mm, gfp_t gfp_mask);
79 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
80 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
82 extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page);
83 extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
86 int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
88 struct mem_cgroup *mem;
90 mem = mem_cgroup_from_task(rcu_dereference((mm)->owner));
95 extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem);
98 mem_cgroup_prepare_migration(struct page *page,
99 struct page *newpage, struct mem_cgroup **ptr);
100 extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
101 struct page *oldpage, struct page *newpage, bool migration_ok);
104 * For memory reclaim.
106 int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg);
107 int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg);
108 unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg,
111 struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg,
113 struct zone_reclaim_stat*
114 mem_cgroup_get_reclaim_stat_from_page(struct page *page);
115 extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
116 struct task_struct *p);
118 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
119 extern int do_swap_account;
122 static inline bool mem_cgroup_disabled(void)
124 if (mem_cgroup_subsys.disabled)
129 void mem_cgroup_update_page_stat(struct page *page,
130 enum mem_cgroup_page_stat_item idx,
133 static inline void mem_cgroup_inc_page_stat(struct page *page,
134 enum mem_cgroup_page_stat_item idx)
136 mem_cgroup_update_page_stat(page, idx, 1);
139 static inline void mem_cgroup_dec_page_stat(struct page *page,
140 enum mem_cgroup_page_stat_item idx)
142 mem_cgroup_update_page_stat(page, idx, -1);
145 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
147 u64 mem_cgroup_get_limit(struct mem_cgroup *mem);
149 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
152 static inline int mem_cgroup_newpage_charge(struct page *page,
153 struct mm_struct *mm, gfp_t gfp_mask)
158 static inline int mem_cgroup_cache_charge(struct page *page,
159 struct mm_struct *mm, gfp_t gfp_mask)
164 static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
165 struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr)
170 static inline void mem_cgroup_commit_charge_swapin(struct page *page,
171 struct mem_cgroup *ptr)
175 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr)
179 static inline void mem_cgroup_uncharge_start(void)
183 static inline void mem_cgroup_uncharge_end(void)
187 static inline void mem_cgroup_uncharge_page(struct page *page)
191 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
195 static inline int mem_cgroup_shmem_charge_fallback(struct page *page,
196 struct mm_struct *mm, gfp_t gfp_mask)
201 static inline void mem_cgroup_add_lru_list(struct page *page, int lru)
205 static inline void mem_cgroup_del_lru_list(struct page *page, int lru)
210 static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru)
215 static inline void mem_cgroup_del_lru(struct page *page)
221 mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to)
225 static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
230 static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
235 static inline int task_in_mem_cgroup(struct task_struct *task,
236 const struct mem_cgroup *mem)
241 static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem)
247 mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
248 struct mem_cgroup **ptr)
253 static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
254 struct page *oldpage, struct page *newpage, bool migration_ok)
258 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
263 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
268 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
273 static inline bool mem_cgroup_disabled(void)
279 mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg)
285 mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg)
290 static inline unsigned long
291 mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone,
298 static inline struct zone_reclaim_stat*
299 mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone)
304 static inline struct zone_reclaim_stat*
305 mem_cgroup_get_reclaim_stat_from_page(struct page *page)
311 mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
315 static inline void mem_cgroup_inc_page_stat(struct page *page,
316 enum mem_cgroup_page_stat_item idx)
320 static inline void mem_cgroup_dec_page_stat(struct page *page,
321 enum mem_cgroup_page_stat_item idx)
326 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
333 u64 mem_cgroup_get_limit(struct mem_cgroup *mem)
338 #endif /* CONFIG_CGROUP_MEM_CONT */
340 #endif /* _LINUX_MEMCONTROL_H */