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 extern void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p);
  31 extern void mm_free_cgroup(struct mm_struct *mm);
  32
  33 #define page_reset_bad_cgroup(page)     ((page)->page_cgroup = 0)
  34
  35 extern struct page_cgroup *page_get_page_cgroup(struct page *page);
  36 extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
  37                                 gfp_t gfp_mask);
  38 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
  39                                         gfp_t gfp_mask);
  40 extern void mem_cgroup_uncharge_page(struct page *page);
  41 extern void mem_cgroup_move_lists(struct page *page, 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 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
  50
  51 #define mm_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_RES_CTLR */
  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_reset_bad_cgroup(struct page *page)
  86 {
  87 }
  88
  89 static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
  90 {
  91         return NULL;
  92 }
  93
  94 static inline int mem_cgroup_charge(struct page *page,
  95                                         struct mm_struct *mm, gfp_t gfp_mask)
  96 {
  97         return 0;
  98 }
  99
 100 static inline int mem_cgroup_cache_charge(struct page *page,
 101                                         struct mm_struct *mm, gfp_t gfp_mask)
 102 {
 103         return 0;
 104 }
 105
 106 static inline void mem_cgroup_uncharge_page(struct page *page)
 107 {
 108 }
 109
 110 static inline void mem_cgroup_move_lists(struct page *page, bool active)
 111 {
 112 }
 113
 114 static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
 115 {
 116         return 1;
 117 }
 118
 119 static inline int task_in_mem_cgroup(struct task_struct *task,
 120                                      const struct mem_cgroup *mem)
 121 {
 122         return 1;
 123 }
 124
 125 static inline int mem_cgroup_prepare_migration(struct page *page)
 126 {
 127         return 0;
 128 }
 129
 130 static inline void mem_cgroup_end_migration(struct page *page)
 131 {
 132 }
 133
 134 static inline void
 135 mem_cgroup_page_migration(struct page *page, struct page *newpage)
 136 {
 137 }
 138
 139 static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
 140 {
 141         return 0;
 142 }
 143
 144 static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
 145 {
 146         return 0;
 147 }
 148
 149 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
 150 {
 151         return 0;
 152 }
 153
 154 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
 155                                                 int priority)
 156 {
 157 }
 158
 159 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
 160                                                 int priority)
 161 {
 162 }
 163
 164 static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
 165                                         struct zone *zone, int priority)
 166 {
 167         return 0;
 168 }
 169
 170 static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
 171                                         struct zone *zone, int priority)
 172 {
 173         return 0;
 174 }
 175 #endif /* CONFIG_CGROUP_MEM_CONT */
 176
 177 #endif /* _LINUX_MEMCONTROL_H */
 178