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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
);
57 extern void mem_cgroup_uncharge_page(struct page
*page
);
58 extern void mem_cgroup_uncharge_cache_page(struct page
*page
);
59 extern int mem_cgroup_shrink_usage(struct page
*page
,
60 struct mm_struct
*mm
, gfp_t gfp_mask
);
62 extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan
,
63 struct list_head
*dst
,
64 unsigned long *scanned
, int order
,
65 int mode
, struct zone
*z
,
66 struct mem_cgroup
*mem_cont
,
67 int active
, int file
);
68 extern void mem_cgroup_out_of_memory(struct mem_cgroup
*mem
, gfp_t gfp_mask
);
69 int task_in_mem_cgroup(struct task_struct
*task
, const struct mem_cgroup
*mem
);
71 extern struct mem_cgroup
*mem_cgroup_from_task(struct task_struct
*p
);
74 int mm_match_cgroup(const struct mm_struct
*mm
, const struct mem_cgroup
*cgroup
)
76 struct mem_cgroup
*mem
;
78 mem
= mem_cgroup_from_task((mm
)->owner
);
84 mem_cgroup_prepare_migration(struct page
*page
, struct mem_cgroup
**ptr
);
85 extern void mem_cgroup_end_migration(struct mem_cgroup
*mem
,
86 struct page
*oldpage
, struct page
*newpage
);
91 extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup
*mem
);
92 extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup
*mem
,
94 extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup
*mem
,
96 int mem_cgroup_inactive_anon_is_low(struct mem_cgroup
*memcg
);
97 unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup
*memcg
,
100 struct zone_reclaim_stat
*mem_cgroup_get_reclaim_stat(struct mem_cgroup
*memcg
,
102 struct zone_reclaim_stat
*
103 mem_cgroup_get_reclaim_stat_from_page(struct page
*page
);
104 extern void mem_cgroup_print_oom_info(struct mem_cgroup
*memcg
,
105 struct task_struct
*p
);
107 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
108 extern int do_swap_account
;
111 static inline bool mem_cgroup_disabled(void)
113 if (mem_cgroup_subsys
.disabled
)
118 extern bool mem_cgroup_oom_called(struct task_struct
*task
);
120 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
123 static inline int mem_cgroup_newpage_charge(struct page
*page
,
124 struct mm_struct
*mm
, gfp_t gfp_mask
)
129 static inline int mem_cgroup_cache_charge(struct page
*page
,
130 struct mm_struct
*mm
, gfp_t gfp_mask
)
135 static inline int mem_cgroup_try_charge_swapin(struct mm_struct
*mm
,
136 struct page
*page
, gfp_t gfp_mask
, struct mem_cgroup
**ptr
)
141 static inline void mem_cgroup_commit_charge_swapin(struct page
*page
,
142 struct mem_cgroup
*ptr
)
146 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup
*ptr
)
150 static inline void mem_cgroup_uncharge_page(struct page
*page
)
154 static inline void mem_cgroup_uncharge_cache_page(struct page
*page
)
158 static inline int mem_cgroup_shrink_usage(struct page
*page
,
159 struct mm_struct
*mm
, gfp_t gfp_mask
)
164 static inline void mem_cgroup_add_lru_list(struct page
*page
, int lru
)
168 static inline void mem_cgroup_del_lru_list(struct page
*page
, int lru
)
173 static inline void mem_cgroup_rotate_lru_list(struct page
*page
, int lru
)
178 static inline void mem_cgroup_del_lru(struct page
*page
)
184 mem_cgroup_move_lists(struct page
*page
, enum lru_list from
, enum lru_list to
)
188 static inline int mm_match_cgroup(struct mm_struct
*mm
, struct mem_cgroup
*mem
)
193 static inline int task_in_mem_cgroup(struct task_struct
*task
,
194 const struct mem_cgroup
*mem
)
200 mem_cgroup_prepare_migration(struct page
*page
, struct mem_cgroup
**ptr
)
205 static inline void mem_cgroup_end_migration(struct mem_cgroup
*mem
,
206 struct page
*oldpage
,
207 struct page
*newpage
)
211 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup
*mem
)
216 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup
*mem
,
221 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup
*mem
,
226 static inline bool mem_cgroup_disabled(void)
231 static inline bool mem_cgroup_oom_called(struct task_struct
*task
)
237 mem_cgroup_inactive_anon_is_low(struct mem_cgroup
*memcg
)
242 static inline unsigned long
243 mem_cgroup_zone_nr_pages(struct mem_cgroup
*memcg
, struct zone
*zone
,
250 static inline struct zone_reclaim_stat
*
251 mem_cgroup_get_reclaim_stat(struct mem_cgroup
*memcg
, struct zone
*zone
)
256 static inline struct zone_reclaim_stat
*
257 mem_cgroup_get_reclaim_stat_from_page(struct page
*page
)
263 mem_cgroup_print_oom_info(struct mem_cgroup
*memcg
, struct task_struct
*p
)
267 #endif /* CONFIG_CGROUP_MEM_CONT */
269 #endif /* _LINUX_MEMCONTROL_H */