LXR linux/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
  23struct mem_cgroup;
  24struct page_cgroup;
  25struct page;
  26struct mm_struct;
  27
  28#ifdef CONFIG_CGROUP_MEM_RES_CTLR
  29
  30extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
  31                                gfp_t gfp_mask);
  32extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
  33                                        gfp_t gfp_mask);
  34extern void mem_cgroup_move_lists(struct page *page, enum lru_list lru);
  35extern void mem_cgroup_uncharge_page(struct page *page);
  36extern void mem_cgroup_uncharge_cache_page(struct page *page);
  37extern int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask);
  38
  39extern 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);
  45extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
  46int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
  47
  48extern 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
  53extern int
  54mem_cgroup_prepare_migration(struct page *page, struct page *newpage);
  55extern void mem_cgroup_end_migration(struct page *page);
  56
  57/*
  58 * For memory reclaim.
  59 */
  60extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
  61extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
  62
  63extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
  64extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
  65                                                        int priority);
  66extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
  67                                                        int priority);
  68
  69extern 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 */
  74static inline int mem_cgroup_charge(struct page *page,
  75                                        struct mm_struct *mm, gfp_t gfp_mask)
  76{
  77        return 0;
  78}
  79
  80static inline int mem_cgroup_cache_charge(struct page *page,
  81                                        struct mm_struct *mm, gfp_t gfp_mask)
  82{
  83        return 0;
  84}
  85
  86static inline void mem_cgroup_uncharge_page(struct page *page)
  87{
  88}
  89
  90static inline void mem_cgroup_uncharge_cache_page(struct page *page)
  91{
  92}
  93
  94static inline int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask)
  95{
  96        return 0;
  97}
  98
  99static inline void mem_cgroup_move_lists(struct page *page, bool active)
 100{
 101}
 102
 103static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
 104{
 105        return 1;
 106}
 107
 108static inline int task_in_mem_cgroup(struct task_struct *task,
 109                                     const struct mem_cgroup *mem)
 110{
 111        return 1;
 112}
 113
 114static inline int
 115mem_cgroup_prepare_migration(struct page *page, struct page *newpage)
 116{
 117        return 0;
 118}
 119
 120static inline void mem_cgroup_end_migration(struct page *page)
 121{
 122}
 123
 124static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
 125{
 126        return 0;
 127}
 128
 129static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
 130{
 131        return 0;
 132}
 133
 134static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
 135{
 136        return 0;
 137}
 138
 139static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
 140                                                int priority)
 141{
 142}
 143
 144static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
 145                                                int priority)
 146{
 147}
 148
 149static 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
 159