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 int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
  31                                 gfp_t gfp_mask);
  32 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
  33                                         gfp_t gfp_mask);
  34 extern void mem_cgroup_move_lists(struct page *page, enum lru_list lru);
  35 extern void mem_cgroup_uncharge_page(struct page *page);
  36 extern void mem_cgroup_uncharge_cache_page(struct page *page);
  37 extern int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask);
  38
  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, int file);
  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
  54 mem_cgroup_prepare_migration(struct page *page, struct page *newpage);
  55 extern void mem_cgroup_end_migration(struct page *page);
  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(struct mem_cgroup *mem, struct zone *zone,
  70                                         int priority, enum lru_list lru);
  71
  72
  73 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
  74 static inline int mem_cgroup_charge(struct page *page,
  75                                         struct mm_struct *mm, gfp_t gfp_mask)
  76 {
  77         return 0;
  78 }
  79
  80 static inline int mem_cgroup_cache_charge(struct page *page,
  81                                         struct mm_struct *mm, gfp_t gfp_mask)
  82 {
  83         return 0;
  84 }
  85
  86 static inline void mem_cgroup_uncharge_page(struct page *page)
  87 {
  88 }
  89
  90 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
  91 {
  92 }
  93
  94 static inline int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask)
  95 {
  96         return 0;
  97 }
  98
  99 static inline void mem_cgroup_move_lists(struct page *page, bool active)
 100 {
 101 }
 102
 103 static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
 104 {
 105         return 1;
 106 }
 107
 108 static inline int task_in_mem_cgroup(struct task_struct *task,
 109                                      const struct mem_cgroup *mem)
 110 {
 111         return 1;
 112 }
 113
 114 static inline int
 115 mem_cgroup_prepare_migration(struct page *page, struct page *newpage)
 116 {
 117         return 0;
 118 }
 119
 120 static inline void mem_cgroup_end_migration(struct page *page)
 121 {
 122 }
 123
 124 static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
 125 {
 126         return 0;
 127 }
 128
 129 static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
 130 {
 131         return 0;
 132 }
 133
 134 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
 135 {
 136         return 0;
 137 }
 138
 139 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
 140                                                 int priority)
 141 {
 142 }
 143
 144 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
 145                                                 int priority)
 146 {
 147 }
 148
 149 static inline long mem_cgroup_calc_reclaim(struct mem_cgroup *mem,
 150                                         struct zone *zone, int priority,
 151                                         enum lru_list lru)
 152 {
 153         return 0;
 154 }
 155 #endif /* CONFIG_CGROUP_MEM_CONT */
 156
 157 #endif /* _LINUX_MEMCONTROL_H */
 158