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(struct mm_struct *mm,
44 gfp_t gfp_mask, struct mem_cgroup **ptr);
45 extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
46 struct page *page, gfp_t mask, struct mem_cgroup **ptr);
47 extern void mem_cgroup_commit_charge_swapin(struct page *page,
48 struct mem_cgroup *ptr);
49 extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr);
51 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
53 extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru);
54 extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru);
55 extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru);
56 extern void mem_cgroup_del_lru(struct page *page);
57 extern void mem_cgroup_move_lists(struct page *page,
58 enum lru_list from, enum lru_list to);
59 extern void mem_cgroup_uncharge_page(struct page *page);
60 extern void mem_cgroup_uncharge_cache_page(struct page *page);
61 extern int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask);
63 extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
64 struct list_head *dst,
65 unsigned long *scanned, int order,
66 int mode, struct zone *z,
67 struct mem_cgroup *mem_cont,
68 int active, int file);
69 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
70 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
72 extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
75 int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
77 struct mem_cgroup *mem;
79 mem = mem_cgroup_from_task((mm)->owner);
85 mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr);
86 extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
87 struct page *oldpage, struct page *newpage);
92 extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
93 extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
95 extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
96 extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
98 extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
101 extern long mem_cgroup_calc_reclaim(struct mem_cgroup *mem, struct zone *zone,
102 int priority, enum lru_list lru);
104 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
105 extern int do_swap_account;
108 static inline bool mem_cgroup_disabled(void)
110 if (mem_cgroup_subsys.disabled)
115 extern bool mem_cgroup_oom_called(struct task_struct *task);
117 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
120 static inline int mem_cgroup_newpage_charge(struct page *page,
121 struct mm_struct *mm, gfp_t gfp_mask)
126 static inline int mem_cgroup_cache_charge(struct page *page,
127 struct mm_struct *mm, gfp_t gfp_mask)
132 static inline int mem_cgroup_try_charge(struct mm_struct *mm,
133 gfp_t gfp_mask, struct mem_cgroup **ptr)
138 static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
139 struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr)
144 static inline void mem_cgroup_commit_charge_swapin(struct page *page,
145 struct mem_cgroup *ptr)
149 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr)
153 static inline void mem_cgroup_uncharge_page(struct page *page)
157 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
161 static inline int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask)
166 static inline void mem_cgroup_add_lru_list(struct page *page, int lru)
170 static inline void mem_cgroup_del_lru_list(struct page *page, int lru)
175 static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru)
180 static inline void mem_cgroup_del_lru(struct page *page)
186 mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to)
190 static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
195 static inline int task_in_mem_cgroup(struct task_struct *task,
196 const struct mem_cgroup *mem)
202 mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr)
207 static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
208 struct page *oldpage,
209 struct page *newpage)
213 static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
218 static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
223 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
228 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
233 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
238 static inline long mem_cgroup_calc_reclaim(struct mem_cgroup *mem,
239 struct zone *zone, int priority,
245 static inline bool mem_cgroup_disabled(void)
250 static inline bool mem_cgroup_oom_called(struct task_struct *task)
254 #endif /* CONFIG_CGROUP_MEM_CONT */
256 #endif /* _LINUX_MEMCONTROL_H */