include/linux/memcontrol.h

   1 /* memcontrol.h - Memory Controller
   2  *
   3  * Copyright IBM Corporation, 2007
   4  * Author Balbir Singh <balbir@linux.vnet.ibm.com>
   5  *
   6  * Copyright 2007 OpenVZ SWsoft Inc
   7  * Author: Pavel Emelianov <xemul@openvz.org>
   8  *
   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.
  13  *
  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.
  18  */
  19
  20 #ifndef _LINUX_MEMCONTROL_H
  21 #define _LINUX_MEMCONTROL_H
  22
  23 struct mem_cgroup;
  24 struct page_cgroup;
  25 struct page;
  26 struct mm_struct;
  27
  28 #ifdef CONFIG_CGROUP_MEM_RES_CTLR
  29
  30 extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
  31                                 gfp_t gfp_mask);
  32 /* for swap handling */
  33 extern int mem_cgroup_try_charge(struct mm_struct *mm,
  34                 gfp_t gfp_mask, struct mem_cgroup **ptr);
  35 extern void mem_cgroup_commit_charge_swapin(struct page *page,
  36                                         struct mem_cgroup *ptr);
  37 extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr);
  38
  39 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
  40                                         gfp_t gfp_mask);
  41 extern void mem_cgroup_move_lists(struct page *page, enum lru_list lru);
  42 extern void mem_cgroup_uncharge_page(struct page *page);
  43 extern void mem_cgroup_uncharge_cache_page(struct page *page);
  44 extern int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask);
  45
  46 extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
  47                                         struct list_head *dst,
  48                                         unsigned long *scanned, int order,
  49                                         int mode, struct zone *z,
  50                                         struct mem_cgroup *mem_cont,
  51                                         int active, int file);
  52 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
  53 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
  54
  55 extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
  56
  57 #define mm_match_cgroup(mm, cgroup)     \
  58         ((cgroup) == mem_cgroup_from_task((mm)->owner))
  59
  60 extern int
  61 mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr);
  62 extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
  63         struct page *oldpage, struct page *newpage);
  64
  65 /*
  66  * For memory reclaim.
  67  */
  68 extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
  69 extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
  70
  71 extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
  72 extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
  73                                                         int priority);
  74 extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
  75                                                         int priority);
  76
  77 extern long mem_cgroup_calc_reclaim(struct mem_cgroup *mem, struct zone *zone,
  78                                         int priority, enum lru_list lru);
  79
  80
  81 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
  82 struct mem_cgroup;
  83
  84 static inline int mem_cgroup_newpage_charge(struct page *page,
  85                                         struct mm_struct *mm, gfp_t gfp_mask)
  86 {
  87         return 0;
  88 }
  89
  90 static inline int mem_cgroup_cache_charge(struct page *page,
  91                                         struct mm_struct *mm, gfp_t gfp_mask)
  92 {
  93         return 0;
  94 }
  95
  96 static inline int mem_cgroup_try_charge(struct mm_struct *mm,
  97                                 gfp_t gfp_mask, struct mem_cgroup **ptr)
  98 {
  99         return 0;
 100 }
 101
 102 static inline void mem_cgroup_commit_charge_swapin(struct page *page,
 103                                           struct mem_cgroup *ptr)
 104 {
 105 }
 106
 107 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr)
 108 {
 109 }
 110
 111 static inline void mem_cgroup_uncharge_page(struct page *page)
 112 {
 113 }
 114
 115 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
 116 {
 117 }
 118
 119 static inline int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask)
 120 {
 121         return 0;
 122 }
 123
 124 static inline void mem_cgroup_move_lists(struct page *page, bool active)
 125 {
 126 }
 127
 128 static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
 129 {
 130         return 1;
 131 }
 132
 133 static inline int task_in_mem_cgroup(struct task_struct *task,
 134                                      const struct mem_cgroup *mem)
 135 {
 136         return 1;
 137 }
 138
 139 static inline int
 140 mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr)
 141 {
 142         return 0;
 143 }
 144
 145 static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
 146                                         struct page *oldpage,
 147                                         struct page *newpage)
 148 {
 149 }
 150
 151 static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
 152 {
 153         return 0;
 154 }
 155
 156 static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
 157 {
 158         return 0;
 159 }
 160
 161 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
 162 {
 163         return 0;
 164 }
 165
 166 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
 167                                                 int priority)
 168 {
 169 }
 170
 171 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
 172                                                 int priority)
 173 {
 174 }
 175
 176 static inline long mem_cgroup_calc_reclaim(struct mem_cgroup *mem,
 177                                         struct zone *zone, int priority,
 178                                         enum lru_list lru)
 179 {
 180         return 0;
 181 }
 182 #endif /* CONFIG_CGROUP_MEM_CONT */
 183
 184 #endif /* _LINUX_MEMCONTROL_H */
 185