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 #include <linux/rcupdate.h>
  24 #include <linux/mm.h>
  25
  26 struct mem_cgroup;
  27 struct page_cgroup;
  28 struct page;
  29 struct mm_struct;
  30
  31 #ifdef CONFIG_CGROUP_MEM_CONT
  32
  33 extern void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p);
  34 extern void mm_free_cgroup(struct mm_struct *mm);
  35 extern void page_assign_page_cgroup(struct page *page,
  36                                         struct page_cgroup *pc);
  37 extern struct page_cgroup *page_get_page_cgroup(struct page *page);
  38 extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
  39                                 gfp_t gfp_mask);
  40 extern void mem_cgroup_uncharge(struct page_cgroup *pc);
  41 extern void mem_cgroup_uncharge_page(struct page *page);
  42 extern void mem_cgroup_move_lists(struct page_cgroup *pc, bool active);
  43 extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
  44                                         struct list_head *dst,
  45                                         unsigned long *scanned, int order,
  46                                         int mode, struct zone *z,
  47                                         struct mem_cgroup *mem_cont,
  48                                         int active);
  49 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
  50 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
  51                                         gfp_t gfp_mask);
  52 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
  53
  54 static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm)
  55 {
  56         return rcu_dereference(mm->mem_cgroup);
  57 }
  58
  59 extern int mem_cgroup_prepare_migration(struct page *page);
  60 extern void mem_cgroup_end_migration(struct page *page);
  61 extern void mem_cgroup_page_migration(struct page *page, struct page *newpage);
  62
  63 /*
  64  * For memory reclaim.
  65  */
  66 extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
  67 extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
  68
  69 extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
  70 extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
  71                                                         int priority);
  72 extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
  73                                                         int priority);
  74
  75 extern long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
  76                                 struct zone *zone, int priority);
  77 extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
  78                                 struct zone *zone, int priority);
  79
  80 #else /* CONFIG_CGROUP_MEM_CONT */
  81 static inline void mm_init_cgroup(struct mm_struct *mm,
  82                                         struct task_struct *p)
  83 {
  84 }
  85
  86 static inline void mm_free_cgroup(struct mm_struct *mm)
  87 {
  88 }
  89
  90 static inline void page_assign_page_cgroup(struct page *page,
  91                                                 struct page_cgroup *pc)
  92 {
  93 }
  94
  95 static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
  96 {
  97         return NULL;
  98 }
  99
 100 static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
 101                                         gfp_t gfp_mask)
 102 {
 103         return 0;
 104 }
 105
 106 static inline void mem_cgroup_uncharge(struct page_cgroup *pc)
 107 {
 108 }
 109
 110 static inline void mem_cgroup_uncharge_page(struct page *page)
 111 {
 112 }
 113
 114 static inline void mem_cgroup_move_lists(struct page_cgroup *pc,
 115                                                 bool active)
 116 {
 117 }
 118
 119 static inline int mem_cgroup_cache_charge(struct page *page,
 120                                                 struct mm_struct *mm,
 121                                                 gfp_t gfp_mask)
 122 {
 123         return 0;
 124 }
 125
 126 static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm)
 127 {
 128         return NULL;
 129 }
 130
 131 static inline int task_in_mem_cgroup(struct task_struct *task,
 132                                      const struct mem_cgroup *mem)
 133 {
 134         return 1;
 135 }
 136
 137 static inline int mem_cgroup_prepare_migration(struct page *page)
 138 {
 139         return 0;
 140 }
 141
 142 static inline void mem_cgroup_end_migration(struct page *page)
 143 {
 144 }
 145
 146 static inline void
 147 mem_cgroup_page_migration(struct page *page, 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_active(struct mem_cgroup *mem,
 177                                         struct zone *zone, int priority)
 178 {
 179         return 0;
 180 }
 181
 182 static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
 183                                         struct zone *zone, int priority)
 184 {
 185         return 0;
 186 }
 187 #endif /* CONFIG_CGROUP_MEM_CONT */
 188
 189 #endif /* _LINUX_MEMCONTROL_H */
 190