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_CONT
  29
  30 extern void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p);
  31 extern void mm_free_cgroup(struct mm_struct *mm);
  32 extern void page_assign_page_cgroup(struct page *page,
  33                                         struct page_cgroup *pc);
  34 extern struct page_cgroup *page_get_page_cgroup(struct page *page);
  35 extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
  36                                 gfp_t gfp_mask);
  37 extern void mem_cgroup_uncharge(struct page_cgroup *pc);
  38 extern void mem_cgroup_uncharge_page(struct page *page);
  39 extern void mem_cgroup_move_lists(struct page_cgroup *pc, bool active);
  40 extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
  41                                         struct list_head *dst,
  42                                         unsigned long *scanned, int order,
  43                                         int mode, struct zone *z,
  44                                         struct mem_cgroup *mem_cont,
  45                                         int active);
  46 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
  47 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
  48                                         gfp_t gfp_mask);
  49 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
  50
  51 #define vm_match_cgroup(mm, cgroup)     \
  52         ((cgroup) == rcu_dereference((mm)->mem_cgroup))
  53
  54 extern int mem_cgroup_prepare_migration(struct page *page);
  55 extern void mem_cgroup_end_migration(struct page *page);
  56 extern void mem_cgroup_page_migration(struct page *page, struct page *newpage);
  57
  58 /*
  59  * For memory reclaim.
  60  */
  61 extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
  62 extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
  63
  64 extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
  65 extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
  66                                                         int priority);
  67 extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
  68                                                         int priority);
  69
  70 extern long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
  71                                 struct zone *zone, int priority);
  72 extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
  73                                 struct zone *zone, int priority);
  74
  75 #else /* CONFIG_CGROUP_MEM_CONT */
  76 static inline void mm_init_cgroup(struct mm_struct *mm,
  77                                         struct task_struct *p)
  78 {
  79 }
  80
  81 static inline void mm_free_cgroup(struct mm_struct *mm)
  82 {
  83 }
  84
  85 static inline void page_assign_page_cgroup(struct page *page,
  86                                                 struct page_cgroup *pc)
  87 {
  88 }
  89
  90 static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
  91 {
  92         return NULL;
  93 }
  94
  95 static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
  96                                         gfp_t gfp_mask)
  97 {
  98         return 0;
  99 }
 100
 101 static inline void mem_cgroup_uncharge(struct page_cgroup *pc)
 102 {
 103 }
 104
 105 static inline void mem_cgroup_uncharge_page(struct page *page)
 106 {
 107 }
 108
 109 static inline void mem_cgroup_move_lists(struct page_cgroup *pc,
 110                                                 bool active)
 111 {
 112 }
 113
 114 static inline int mem_cgroup_cache_charge(struct page *page,
 115                                                 struct mm_struct *mm,
 116                                                 gfp_t gfp_mask)
 117 {
 118         return 0;
 119 }
 120
 121 static inline int vm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
 122 {
 123         return 1;
 124 }
 125
 126 static inline int task_in_mem_cgroup(struct task_struct *task,
 127                                      const struct mem_cgroup *mem)
 128 {
 129         return 1;
 130 }
 131
 132 static inline int mem_cgroup_prepare_migration(struct page *page)
 133 {
 134         return 0;
 135 }
 136
 137 static inline void mem_cgroup_end_migration(struct page *page)
 138 {
 139 }
 140
 141 static inline void
 142 mem_cgroup_page_migration(struct page *page, struct page *newpage)
 143 {
 144 }
 145
 146 static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
 147 {
 148         return 0;
 149 }
 150
 151 static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
 152 {
 153         return 0;
 154 }
 155
 156 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
 157 {
 158         return 0;
 159 }
 160
 161 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
 162                                                 int priority)
 163 {
 164 }
 165
 166 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
 167                                                 int priority)
 168 {
 169 }
 170
 171 static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
 172                                         struct zone *zone, int priority)
 173 {
 174         return 0;
 175 }
 176
 177 static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
 178                                         struct zone *zone, int priority)
 179 {
 180         return 0;
 181 }
 182 #endif /* CONFIG_CGROUP_MEM_CONT */
 183
 184 #endif /* _LINUX_MEMCONTROL_H */
 185