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 extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
29 struct list_head *dst,
30 unsigned long *scanned, int order,
31 int mode, struct zone *z,
32 struct mem_cgroup *mem_cont,
33 int active, int file);
35 #ifdef CONFIG_CGROUP_MEM_RES_CTLR
37 * All "charge" functions with gfp_mask should use GFP_KERNEL or
38 * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't
39 * alloc memory but reclaims memory from all available zones. So, "where I want
40 * memory from" bits of gfp_mask has no meaning. So any bits of that field is
41 * available but adding a rule is better. charge functions' gfp_mask should
42 * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous
44 * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.)
47 extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
49 /* for swap handling */
50 extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
51 struct page *page, gfp_t mask, struct mem_cgroup **ptr);
52 extern void mem_cgroup_commit_charge_swapin(struct page *page,
53 struct mem_cgroup *ptr);
54 extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr);
56 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
58 extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru);
59 extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru);
60 extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru);
61 extern void mem_cgroup_del_lru(struct page *page);
62 extern void mem_cgroup_move_lists(struct page *page,
63 enum lru_list from, enum lru_list to);
65 /* For coalescing uncharge for reducing memcg' overhead*/
66 extern void mem_cgroup_uncharge_start(void);
67 extern void mem_cgroup_uncharge_end(void);
69 extern void mem_cgroup_uncharge_page(struct page *page);
70 extern void mem_cgroup_uncharge_cache_page(struct page *page);
71 extern int mem_cgroup_shmem_charge_fallback(struct page *page,
72 struct mm_struct *mm, gfp_t gfp_mask);
74 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
75 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
77 extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page);
78 extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
81 int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
83 struct mem_cgroup *mem;
85 mem = mem_cgroup_from_task(rcu_dereference((mm)->owner));
90 extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem);
93 mem_cgroup_prepare_migration(struct page *page,
94 struct page *newpage, struct mem_cgroup **ptr);
95 extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
96 struct page *oldpage, struct page *newpage);
101 int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg);
102 int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg);
103 unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg,
106 struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg,
108 struct zone_reclaim_stat*
109 mem_cgroup_get_reclaim_stat_from_page(struct page *page);
110 extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
111 struct task_struct *p);
113 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
114 extern int do_swap_account;
117 static inline bool mem_cgroup_disabled(void)
119 if (mem_cgroup_subsys.disabled)
124 void mem_cgroup_update_file_mapped(struct page *page, int val);
125 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
126 gfp_t gfp_mask, int nid,
128 u64 mem_cgroup_get_limit(struct mem_cgroup *mem);
130 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
133 static inline int mem_cgroup_newpage_charge(struct page *page,
134 struct mm_struct *mm, gfp_t gfp_mask)
139 static inline int mem_cgroup_cache_charge(struct page *page,
140 struct mm_struct *mm, gfp_t gfp_mask)
145 static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
146 struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr)
151 static inline void mem_cgroup_commit_charge_swapin(struct page *page,
152 struct mem_cgroup *ptr)
156 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr)
160 static inline void mem_cgroup_uncharge_start(void)
164 static inline void mem_cgroup_uncharge_end(void)
168 static inline void mem_cgroup_uncharge_page(struct page *page)
172 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
176 static inline int mem_cgroup_shmem_charge_fallback(struct page *page,
177 struct mm_struct *mm, gfp_t gfp_mask)
182 static inline void mem_cgroup_add_lru_list(struct page *page, int lru)
186 static inline void mem_cgroup_del_lru_list(struct page *page, int lru)
191 static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru)
196 static inline void mem_cgroup_del_lru(struct page *page)
202 mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to)
206 static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
211 static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
216 static inline int task_in_mem_cgroup(struct task_struct *task,
217 const struct mem_cgroup *mem)
222 static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem)
228 mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
229 struct mem_cgroup **ptr)
234 static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
235 struct page *oldpage,
236 struct page *newpage)
240 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
245 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
250 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
255 static inline bool mem_cgroup_disabled(void)
261 mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg)
267 mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg)
272 static inline unsigned long
273 mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone,
280 static inline struct zone_reclaim_stat*
281 mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone)
286 static inline struct zone_reclaim_stat*
287 mem_cgroup_get_reclaim_stat_from_page(struct page *page)
293 mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
297 static inline void mem_cgroup_update_file_mapped(struct page *page,
303 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
304 gfp_t gfp_mask, int nid, int zid)
310 u64 mem_cgroup_get_limit(struct mem_cgroup *mem)
315 #endif /* CONFIG_CGROUP_MEM_CONT */
317 #endif /* _LINUX_MEMCONTROL_H */