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_move_lists(struct page_cgroup *pc, bool active);
  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 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
  50                                         gfp_t gfp_mask);
  51 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
  52
  53 static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm)
  54 {
  55         return rcu_dereference(mm->mem_cgroup);
  56 }
  57
  58 static inline void mem_cgroup_uncharge_page(struct page *page)
  59 {
  60         mem_cgroup_uncharge(page_get_page_cgroup(page));
  61 }
  62
  63 extern int mem_cgroup_prepare_migration(struct page *page);
  64 extern void mem_cgroup_end_migration(struct page *page);
  65 extern void mem_cgroup_page_migration(struct page *page, struct page *newpage);
  66
  67 /*
  68  * For memory reclaim.
  69  */
  70 extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
  71 extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
  72
  73 extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
  74 extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
  75                                                         int priority);
  76 extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
  77                                                         int priority);
  78
  79 extern long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
  80                                 struct zone *zone, int priority);
  81 extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
  82                                 struct zone *zone, int priority);
  83
  84 #else /* CONFIG_CGROUP_MEM_CONT */
  85 static inline void mm_init_cgroup(struct mm_struct *mm,
  86                                         struct task_struct *p)
  87 {
  88 }
  89
  90 static inline void mm_free_cgroup(struct mm_struct *mm)
  91 {
  92 }
  93
  94 static inline void page_assign_page_cgroup(struct page *page,
  95                                                 struct page_cgroup *pc)
  96 {
  97 }
  98
  99 static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
 100 {
 101         return NULL;
 102 }
 103
 104 static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
 105                                         gfp_t gfp_mask)
 106 {
 107         return 0;
 108 }
 109
 110 static inline void mem_cgroup_uncharge(struct page_cgroup *pc)
 111 {
 112 }
 113
 114 static inline void mem_cgroup_uncharge_page(struct page *page)
 115 {
 116 }
 117
 118 static inline void mem_cgroup_move_lists(struct page_cgroup *pc,
 119                                                 bool active)
 120 {
 121 }
 122
 123 static inline int mem_cgroup_cache_charge(struct page *page,
 124                                                 struct mm_struct *mm,
 125                                                 gfp_t gfp_mask)
 126 {
 127         return 0;
 128 }
 129
 130 static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm)
 131 {
 132         return NULL;
 133 }
 134
 135 static inline int task_in_mem_cgroup(struct task_struct *task,
 136                                      const struct mem_cgroup *mem)
 137 {
 138         return 1;
 139 }
 140
 141 static inline int mem_cgroup_prepare_migration(struct page *page)
 142 {
 143         return 0;
 144 }
 145
 146 static inline void mem_cgroup_end_migration(struct page *page)
 147 {
 148 }
 149
 150 static inline void
 151 mem_cgroup_page_migration(struct page *page, struct page *newpage)
 152 {
 153 }
 154
 155 static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
 156 {
 157         return 0;
 158 }
 159
 160 static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
 161 {
 162         return 0;
 163 }
 164
 165 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
 166 {
 167         return 0;
 168 }
 169
 170 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
 171                                                 int priority)
 172 {
 173 }
 174
 175 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
 176                                                 int priority)
 177 {
 178 }
 179
 180 static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
 181                                         struct zone *zone, int priority)
 182 {
 183         return 0;
 184 }
 185
 186 static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
 187                                         struct zone *zone, int priority)
 188 {
 189         return 0;
 190 }
 191 #endif /* CONFIG_CGROUP_MEM_CONT */
 192
 193 #endif /* _LINUX_MEMCONTROL_H */
 194