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 #define page_reset_bad_cgroup(page)     ((page)->page_cgroup = 0)
  31
  32 extern struct page_cgroup *page_get_page_cgroup(struct page *page);
  33 extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
  34                                 gfp_t gfp_mask);
  35 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
  36                                         gfp_t gfp_mask);
  37 extern void mem_cgroup_move_lists(struct page *page, enum lru_list lru);
  38 extern void mem_cgroup_uncharge_page(struct page *page);
  39 extern void mem_cgroup_uncharge_cache_page(struct page *page);
  40 extern int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask);
  41
  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, int file);
  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 extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
  52
  53 #define mm_match_cgroup(mm, cgroup)     \
  54         ((cgroup) == mem_cgroup_from_task((mm)->owner))
  55
  56 extern int
  57 mem_cgroup_prepare_migration(struct page *page, struct page *newpage);
  58 extern void mem_cgroup_end_migration(struct page *page);
  59
  60 /*
  61  * For memory reclaim.
  62  */
  63 extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
  64 extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
  65
  66 extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
  67 extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
  68                                                         int priority);
  69 extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
  70                                                         int priority);
  71
  72 extern long mem_cgroup_calc_reclaim(struct mem_cgroup *mem, struct zone *zone,
  73                                         int priority, enum lru_list lru);
  74
  75 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
  76 static inline void page_reset_bad_cgroup(struct page *page)
  77 {
  78 }
  79
  80 static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
  81 {
  82         return NULL;
  83 }
  84
  85 static inline int mem_cgroup_charge(struct page *page,
  86                                         struct mm_struct *mm, gfp_t gfp_mask)
  87 {
  88         return 0;
  89 }
  90
  91 static inline int mem_cgroup_cache_charge(struct page *page,
  92                                         struct mm_struct *mm, gfp_t gfp_mask)
  93 {
  94         return 0;
  95 }
  96
  97 static inline void mem_cgroup_uncharge_page(struct page *page)
  98 {
  99 }
 100
 101 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
 102 {
 103 }
 104
 105 static inline int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask)
 106 {
 107         return 0;
 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
 126 mem_cgroup_prepare_migration(struct page *page, struct page *newpage)
 127 {
 128         return 0;
 129 }
 130
 131 static inline void mem_cgroup_end_migration(struct page *page)
 132 {
 133 }
 134
 135 static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
 136 {
 137         return 0;
 138 }
 139
 140 static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
 141 {
 142         return 0;
 143 }
 144
 145 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
 146 {
 147         return 0;
 148 }
 149
 150 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
 151                                                 int priority)
 152 {
 153 }
 154
 155 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
 156                                                 int priority)
 157 {
 158 }
 159
 160 static inline long mem_cgroup_calc_reclaim(struct mem_cgroup *mem,
 161                                         struct zone *zone, int priority,
 162                                         enum lru_list lru)
 163 {
 164         return 0;
 165 }
 166 #endif /* CONFIG_CGROUP_MEM_CONT */
 167
 168 #endif /* _LINUX_MEMCONTROL_H */
 169