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
  30#define page_reset_bad_cgroup(page)     ((page)->page_cgroup = 0)
  31
  32extern struct page_cgroup *page_get_page_cgroup(struct page *page);
  33extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
  34                                gfp_t gfp_mask);
  35extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
  36                                        gfp_t gfp_mask);
  37extern void mem_cgroup_uncharge_page(struct page *page);
  38extern void mem_cgroup_uncharge_cache_page(struct page *page);
  39extern void mem_cgroup_move_lists(struct page *page, bool active);
  40extern int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask);
  41
  42extern 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);
  48extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
  49int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
  50
  51extern 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
  56extern int
  57mem_cgroup_prepare_migration(struct page *page, struct page *newpage);
  58extern void mem_cgroup_end_migration(struct page *page);
  59
  60/*
  61 * For memory reclaim.
  62 */
  63extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem);
  64extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem);
  65
  66extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem);
  67extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
  68                                                        int priority);
  69extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
  70                                                        int priority);
  71
  72extern long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
  73                                struct zone *zone, int priority);
  74extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
  75                                struct zone *zone, int priority);
  76
  77#else /* CONFIG_CGROUP_MEM_RES_CTLR */
  78static inline void page_reset_bad_cgroup(struct page *page)
  79{
  80}
  81
  82static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
  83{
  84        return NULL;
  85}
  86
  87static inline int mem_cgroup_charge(struct page *page,
  88                                        struct mm_struct *mm, gfp_t gfp_mask)
  89{
  90        return 0;
  91}
  92
  93static inline int mem_cgroup_cache_charge(struct page *page,
  94                                        struct mm_struct *mm, gfp_t gfp_mask)
  95{
  96        return 0;
  97}
  98
  99static inline void mem_cgroup_uncharge_page(struct page *page)
 100{
 101}
 102
 103static inline void mem_cgroup_uncharge_cache_page(struct page *page)
 104{
 105}
 106
 107static inline int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask)
 108{
 109        return 0;
 110}
 111
 112static inline void mem_cgroup_move_lists(struct page *page, bool active)
 113{
 114}
 115
 116static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
 117{
 118        return 1;
 119}
 120
 121static inline int task_in_mem_cgroup(struct task_struct *task,
 122                                     const struct mem_cgroup *mem)
 123{
 124        return 1;
 125}
 126
 127static inline int
 128mem_cgroup_prepare_migration(struct page *page, struct page *newpage)
 129{
 130        return 0;
 131}
 132
 133static inline void mem_cgroup_end_migration(struct page *page)
 134{
 135}
 136
 137static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem)
 138{
 139        return 0;
 140}
 141
 142static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem)
 143{
 144        return 0;
 145}
 146
 147static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
 148{
 149        return 0;
 150}
 151
 152static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
 153                                                int priority)
 154{
 155}
 156
 157static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
 158                                                int priority)
 159{
 160}
 161
 162static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem,
 163                                        struct zone *zone, int priority)
 164{
 165        return 0;
 166}
 167
 168static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem,
 169                                        struct zone *zone, int priority)
 170{
 171        return 0;
 172}
 173#endif /* CONFIG_CGROUP_MEM_CONT */
 174
 175#endif /* _LINUX_MEMCONTROL_H */
 176
 177