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 #define page_reset_bad_cgroup(page)     ((page)->page_cgroup = 0)
  31
  32 extern struct page_cgroup *page_get_page_cgroup(struct page *page);
  33 extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
  34                                 gfp_t gfp_mask);
  35 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
  36                                         gfp_t gfp_mask);
  37 extern void mem_cgroup_uncharge_page(struct page *page);
  38 extern void mem_cgroup_uncharge_cache_page(struct page *page);
  39 extern void mem_cgroup_move_lists(struct page *page, bool active);
  40 extern int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask);
  41
  42 extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
  43                                         struct list_head *dst,
  44                                         unsigned long *scanned, int order,
  45                                         int mode, struct zone *z,
  46                                         struct mem_cgroup *mem_cont,
  47                                         int active);
  48 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
  49 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
  50
  51 extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
  52
  53 #define mm_match_cgroup(mm, cgroup)     \
  54         ((cgroup) == mem_cgroup_from_task((mm)->owner))
  55
  56 extern int
  57 mem_cgroup_prepare_migration(struct page *page, struct page *newpage);
  58 extern void mem_cgroup_end_migration(struct page *page);
  59
  60 /*
  61  * For memory reclaim.
  62  */
  63 extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
  64 extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
  65
  66 extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
  67 extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
  68                                                         int priority);
  69 extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
  70                                                         int priority);
  71
  72 extern long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
  73                                 struct zone *zone, int priority);
  74 extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
  75                                 struct zone *zone, int priority);
  76
  77 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
  78 static inline void page_reset_bad_cgroup(struct page *page)
  79 {
  80 }
  81
  82 static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
  83 {
  84         return NULL;
  85 }
  86
  87 static inline int mem_cgroup_charge(struct page *page,
  88                                         struct mm_struct *mm, gfp_t gfp_mask)
  89 {
  90         return 0;
  91 }
  92
  93 static inline int mem_cgroup_cache_charge(struct page *page,
  94                                         struct mm_struct *mm, gfp_t gfp_mask)
  95 {
  96         return 0;
  97 }
  98
  99 static inline void mem_cgroup_uncharge_page(struct page *page)
 100 {
 101 }
 102
 103 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
 104 {
 105 }
 106
 107 static inline int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask)
 108 {
 109         return 0;
 110 }
 111
 112 static inline void mem_cgroup_move_lists(struct page *page, bool active)
 113 {
 114 }
 115
 116 static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
 117 {
 118         return 1;
 119 }
 120
 121 static inline int task_in_mem_cgroup(struct task_struct *task,
 122                                      const struct mem_cgroup *mem)
 123 {
 124         return 1;
 125 }
 126
 127 static inline int
 128 mem_cgroup_prepare_migration(struct page *page, struct page *newpage)
 129 {
 130         return 0;
 131 }
 132
 133 static inline void mem_cgroup_end_migration(struct page *page)
 134 {
 135 }
 136
 137 static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
 138 {
 139         return 0;
 140 }
 141
 142 static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
 143 {
 144         return 0;
 145 }
 146
 147 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
 148 {
 149         return 0;
 150 }
 151
 152 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
 153                                                 int priority)
 154 {
 155 }
 156
 157 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
 158                                                 int priority)
 159 {
 160 }
 161
 162 static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
 163                                         struct zone *zone, int priority)
 164 {
 165         return 0;
 166 }
 167
 168 static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
 169                                         struct zone *zone, int priority)
 170 {
 171         return 0;
 172 }
 173 #endif /* CONFIG_CGROUP_MEM_CONT */
 174
 175 #endif /* _LINUX_MEMCONTROL_H */
 176