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_CONT
  29
  30 extern void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p);
  31 extern void mm_free_cgroup(struct mm_struct *mm);
  32 extern void page_assign_page_cgroup(struct page *page,
  33                                         struct page_cgroup *pc);
  34 extern struct page_cgroup *page_get_page_cgroup(struct page *page);
  35 extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
  36                                 gfp_t gfp_mask);
  37 extern void mem_cgroup_uncharge(struct page_cgroup *pc);
  38 extern void mem_cgroup_move_lists(struct page_cgroup *pc, bool active);
  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);
  45 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
  46 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
  47                                         gfp_t gfp_mask);
  48 extern struct mem_cgroup *mm_cgroup(struct mm_struct *mm);
  49
  50 static inline void mem_cgroup_uncharge_page(struct page *page)
  51 {
  52         mem_cgroup_uncharge(page_get_page_cgroup(page));
  53 }
  54
  55 #else /* CONFIG_CGROUP_MEM_CONT */
  56 static inline void mm_init_cgroup(struct mm_struct *mm,
  57                                         struct task_struct *p)
  58 {
  59 }
  60
  61 static inline void mm_free_cgroup(struct mm_struct *mm)
  62 {
  63 }
  64
  65 static inline void page_assign_page_cgroup(struct page *page,
  66                                                 struct page_cgroup *pc)
  67 {
  68 }
  69
  70 static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
  71 {
  72         return NULL;
  73 }
  74
  75 static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm,
  76                                         gfp_t gfp_mask)
  77 {
  78         return 0;
  79 }
  80
  81 static inline void mem_cgroup_uncharge(struct page_cgroup *pc)
  82 {
  83 }
  84
  85 static inline void mem_cgroup_uncharge_page(struct page *page)
  86 {
  87 }
  88
  89 static inline void mem_cgroup_move_lists(struct page_cgroup *pc,
  90                                                 bool active)
  91 {
  92 }
  93
  94 static inline int mem_cgroup_cache_charge(struct page *page,
  95                                                 struct mm_struct *mm,
  96                                                 gfp_t gfp_mask)
  97 {
  98         return 0;
  99 }
 100
 101 static inline struct mem_cgroup *mm_cgroup(struct mm_struct *mm)
 102 {
 103         return NULL;
 104 }
 105
 106 #endif /* CONFIG_CGROUP_MEM_CONT */
 107
 108 #endif /* _LINUX_MEMCONTROL_H */
 109