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_newpage_charge(struct page *page, struct mm_struct *mm,
  31                                 gfp_t gfp_mask);
  32 /* for swap handling */
  33 extern int mem_cgroup_try_charge(struct mm_struct *mm,
  34                 gfp_t gfp_mask, struct mem_cgroup **ptr);
  35 extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
  36                 struct page *page, gfp_t mask, struct mem_cgroup **ptr);
  37 extern void mem_cgroup_commit_charge_swapin(struct page *page,
  38                                         struct mem_cgroup *ptr);
  39 extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr);
  40
  41 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
  42                                         gfp_t gfp_mask);
  43 extern void mem_cgroup_move_lists(struct page *page, enum lru_list lru);
  44 extern void mem_cgroup_uncharge_page(struct page *page);
  45 extern void mem_cgroup_uncharge_cache_page(struct page *page);
  46 extern int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask);
  47
  48 extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
  49                                         struct list_head *dst,
  50                                         unsigned long *scanned, int order,
  51                                         int mode, struct zone *z,
  52                                         struct mem_cgroup *mem_cont,
  53                                         int active, int file);
  54 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
  55 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
  56
  57 extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
  58
  59 #define mm_match_cgroup(mm, cgroup)     \
  60         ((cgroup) == mem_cgroup_from_task((mm)->owner))
  61
  62 extern int
  63 mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr);
  64 extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
  65         struct page *oldpage, 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(struct mem_cgroup *mem, struct zone *zone,
  80                                         int priority, enum lru_list lru);
  81
  82 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
  83 extern int do_swap_account;
  84 #endif
  85 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
  86 struct mem_cgroup;
  87
  88 static inline int mem_cgroup_newpage_charge(struct page *page,
  89                                         struct mm_struct *mm, gfp_t gfp_mask)
  90 {
  91         return 0;
  92 }
  93
  94 static inline int mem_cgroup_cache_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_try_charge(struct mm_struct *mm,
 101                         gfp_t gfp_mask, struct mem_cgroup **ptr)
 102 {
 103         return 0;
 104 }
 105
 106 static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
 107                 struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr)
 108 {
 109         return 0;
 110 }
 111
 112 static inline void mem_cgroup_commit_charge_swapin(struct page *page,
 113                                           struct mem_cgroup *ptr)
 114 {
 115 }
 116
 117 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr)
 118 {
 119 }
 120
 121 static inline void mem_cgroup_uncharge_page(struct page *page)
 122 {
 123 }
 124
 125 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
 126 {
 127 }
 128
 129 static inline int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask)
 130 {
 131         return 0;
 132 }
 133
 134 static inline void mem_cgroup_move_lists(struct page *page, bool active)
 135 {
 136 }
 137
 138 static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
 139 {
 140         return 1;
 141 }
 142
 143 static inline int task_in_mem_cgroup(struct task_struct *task,
 144                                      const struct mem_cgroup *mem)
 145 {
 146         return 1;
 147 }
 148
 149 static inline int
 150 mem_cgroup_prepare_migration(struct page *page, struct mem_cgroup **ptr)
 151 {
 152         return 0;
 153 }
 154
 155 static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
 156                                         struct page *oldpage,
 157                                         struct page *newpage)
 158 {
 159 }
 160
 161 static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
 162 {
 163         return 0;
 164 }
 165
 166 static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
 167 {
 168         return 0;
 169 }
 170
 171 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
 172 {
 173         return 0;
 174 }
 175
 176 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
 177                                                 int priority)
 178 {
 179 }
 180
 181 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
 182                                                 int priority)
 183 {
 184 }
 185
 186 static inline long mem_cgroup_calc_reclaim(struct mem_cgroup *mem,
 187                                         struct zone *zone, int priority,
 188                                         enum lru_list lru)
 189 {
 190         return 0;
 191 }
 192 #endif /* CONFIG_CGROUP_MEM_CONT */
 193
 194 #endif /* _LINUX_MEMCONTROL_H */
 195