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