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
  47 static inline void mem_cgroup_uncharge_page(struct page *page)
  48 {
  49         mem_cgroup_uncharge(page_get_page_cgroup(page));
  50 }
  51
  52 #else /* CONFIG_CGROUP_MEM_CONT */
  53 static inline void mm_init_cgroup(struct mm_struct *mm,
  54                                         struct task_struct *p)
  55 {
  56 }
  57
  58 static inline void mm_free_cgroup(struct mm_struct *mm)
  59 {
  60 }
  61
  62 static inline void page_assign_page_cgroup(struct page *page,
  63                                                 struct page_cgroup *pc)
  64 {
  65 }
  66
  67 static inline struct page_cgroup *page_get_page_cgroup(struct page *page)
  68 {
  69         return NULL;
  70 }
  71
  72 static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm)
  73 {
  74         return 0;
  75 }
  76
  77 static inline void mem_cgroup_uncharge(struct page_cgroup *pc)
  78 {
  79 }
  80
  81 static inline void mem_cgroup_uncharge_page(struct page *page)
  82 {
  83 }
  84
  85 static inline void mem_cgroup_move_lists(struct page_cgroup *pc,
  86                                                 bool active)
  87 {
  88 }
  89
  90 static inline int mem_cgroup_cache_charge(struct page *page,
  91                                                 struct mm_struct *mm)
  92 {
  93         return 0;
  94 }
  95
  96 #endif /* CONFIG_CGROUP_MEM_CONT */
  97
  98 #endif /* _LINUX_MEMCONTROL_H */
  99