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 #ifdef CONFIG_CGROUP_MEM_RES_CTLR
30 * All "charge" functions with gfp_mask should use GFP_KERNEL or
31 * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't
32 * alloc memory but reclaims memory from all available zones. So, "where I want
33 * memory from" bits of gfp_mask has no meaning. So any bits of that field is
34 * available but adding a rule is better. charge functions' gfp_mask should
35 * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous
37 * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.)
40 extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
42 /* for swap handling */
43 extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
44 struct page *page, gfp_t mask, struct mem_cgroup **ptr);
45 extern void mem_cgroup_commit_charge_swapin(struct page *page,
46 struct mem_cgroup *ptr);
47 extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr);
49 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
51 extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru);
52 extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru);
53 extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru);
54 extern void mem_cgroup_del_lru(struct page *page);
55 extern void mem_cgroup_move_lists(struct page *page,
56 enum lru_list from, enum lru_list to);
58 /* For coalescing uncharge for reducing memcg' overhead*/
59 extern void mem_cgroup_uncharge_start(void);
60 extern void mem_cgroup_uncharge_end(void);
62 extern void mem_cgroup_uncharge_page(struct page *page);
63 extern void mem_cgroup_uncharge_cache_page(struct page *page);
64 extern int mem_cgroup_shmem_charge_fallback(struct page *page,
65 struct mm_struct *mm, gfp_t gfp_mask);
67 extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
68 struct list_head *dst,
69 unsigned long *scanned, int order,
70 int mode, struct zone *z,
71 struct mem_cgroup *mem_cont,
72 int active, int file);
73 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
74 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
76 extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
79 int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
81 struct mem_cgroup *mem;
83 mem = mem_cgroup_from_task(rcu_dereference((mm)->owner));
89 mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr);
90 extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
91 struct page *oldpage, struct page *newpage);
96 extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
97 extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
99 extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
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 extern bool mem_cgroup_oom_called(struct task_struct *task);
125 void mem_cgroup_update_file_mapped(struct page *page, int val);
126 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
127 gfp_t gfp_mask, int nid,
129 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
132 static inline int mem_cgroup_newpage_charge(struct page *page,
133 struct mm_struct *mm, gfp_t gfp_mask)
138 static inline int mem_cgroup_cache_charge(struct page *page,
139 struct mm_struct *mm, gfp_t gfp_mask)
144 static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
145 struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr)
150 static inline void mem_cgroup_commit_charge_swapin(struct page *page,
151 struct mem_cgroup *ptr)
155 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr)
159 static inline void mem_cgroup_uncharge_start(void)
163 static inline void mem_cgroup_uncharge_end(void)
167 static inline void mem_cgroup_uncharge_page(struct page *page)
171 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
175 static inline int mem_cgroup_shmem_charge_fallback(struct page *page,
176 struct mm_struct *mm, gfp_t gfp_mask)
181 static inline void mem_cgroup_add_lru_list(struct page *page, int lru)
185 static inline void mem_cgroup_del_lru_list(struct page *page, int lru)
190 static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru)
195 static inline void mem_cgroup_del_lru(struct page *page)
201 mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to)
205 static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
210 static inline int task_in_mem_cgroup(struct task_struct *task,
211 const struct mem_cgroup *mem)
217 mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr)
222 static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
223 struct page *oldpage,
224 struct page *newpage)
228 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
233 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
238 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
243 static inline bool mem_cgroup_disabled(void)
248 static inline bool mem_cgroup_oom_called(struct task_struct *task)
254 mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg)
260 mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg)
265 static inline unsigned long
266 mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone,
273 static inline struct zone_reclaim_stat*
274 mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone)
279 static inline struct zone_reclaim_stat*
280 mem_cgroup_get_reclaim_stat_from_page(struct page *page)
286 mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
290 static inline void mem_cgroup_update_file_mapped(struct page *page,
296 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
297 gfp_t gfp_mask, int nid, int zid)
302 #endif /* CONFIG_CGROUP_MEM_CONT */
304 #endif /* _LINUX_MEMCONTROL_H */