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 extern void mem_cgroup_uncharge(struct page_cgroup *pc);
  37 extern void mem_cgroup_move_lists(struct page_cgroup *pc, bool active);
  38 extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
  39                                         struct list_head *dst,
  40                                         unsigned long *scanned, int order,
  41                                         int mode, struct zone *z,
  42                                         struct mem_cgroup *mem_cont,
  43                                         int active);
  44 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
  45 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm);
  46 extern struct mem_cgroup *mm_cgroup(struct mm_struct *mm);
  47
  48 static inline void mem_cgroup_uncharge_page(struct page *page)
  49 {
  50         mem_cgroup_uncharge(page_get_page_cgroup(page));
  51 }
  52
  53 #else /* CONFIG_CGROUP_MEM_CONT */
  54 static inline void mm_init_cgroup(struct mm_struct *mm,
  55                                         struct task_struct *p)
  56 {
  57 }
  58
  59 static inline void mm_free_cgroup(struct mm_struct *mm)
  60 {
  61 }
  62
  63 static inline void page_assign_page_cgroup(struct page *page,
  64                                                 struct page_cgroup *pc)
  65 {
  66 }
  67
  68 static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
  69 {
  70         return NULL;
  71 }
  72
  73 static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm)
  74 {
  75         return 0;
  76 }
  77
  78 static inline void mem_cgroup_uncharge(struct page_cgroup *pc)
  79 {
  80 }
  81
  82 static inline void mem_cgroup_uncharge_page(struct page *page)
  83 {
  84 }
  85
  86 static inline void mem_cgroup_move_lists(struct page_cgroup *pc,
  87                                                 bool active)
  88 {
  89 }
  90
  91 static inline int mem_cgroup_cache_charge(struct page *page,
  92                                                 struct mm_struct *mm)
  93 {
  94         return 0;
  95 }
  96
  97 static inline struct mem_cgroup *mm_cgroup(struct mm_struct *mm)
  98 {
  99         return NULL;
 100 }
 101
 102 #endif /* CONFIG_CGROUP_MEM_CONT */
 103
 104 #endif /* _LINUX_MEMCONTROL_H */
 105