1 /* memcontrol.h - Memory Controller 2 * 3 * Copyright IBM Corporation, 2007 4 * Author Balbir Singh <[email protected]> 5 * 6 * Copyright 2007 OpenVZ SWsoft Inc 7 * Author: Pavel Emelianov <[email protected]> 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_RES_CTLR 29 30 extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm, 31 gfp_t gfp_mask); 32 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, 33 gfp_t gfp_mask); 34 extern void mem_cgroup_move_lists(struct page *page, enum lru_list lru); 35 extern void mem_cgroup_uncharge_page(struct page *page); 36 extern void mem_cgroup_uncharge_cache_page(struct page *page); 37 extern int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask); 38 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, int file); 45 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask); 46 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem); 47 48 extern 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 53 extern int 54 mem_cgroup_prepare_migration(struct page *page, struct page *newpage); 55 extern void mem_cgroup_end_migration(struct page *page); 56 57 /* 58 * For memory reclaim. 59 */ 60 extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem); 61 extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem); 62 63 extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem); 64 extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, 65 int priority); 66 extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, 67 int priority); 68 69 extern 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 */ 74 static inline int mem_cgroup_charge(struct page *page, 75 struct mm_struct *mm, gfp_t gfp_mask) 76 { 77 return 0; 78 } 79 80 static inline int mem_cgroup_cache_charge(struct page *page, 81 struct mm_struct *mm, gfp_t gfp_mask) 82 { 83 return 0; 84 } 85 86 static inline void mem_cgroup_uncharge_page(struct page *page) 87 { 88 } 89 90 static inline void mem_cgroup_uncharge_cache_page(struct page *page) 91 { 92 } 93 94 static inline int mem_cgroup_shrink_usage(struct mm_struct *mm, gfp_t gfp_mask) 95 { 96 return 0; 97 } 98 99 static inline void mem_cgroup_move_lists(struct page *page, bool active) 100 { 101 } 102 103 static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem) 104 { 105 return 1; 106 } 107 108 static inline int task_in_mem_cgroup(struct task_struct *task, 109 const struct mem_cgroup *mem) 110 { 111 return 1; 112 } 113 114 static inline int 115 mem_cgroup_prepare_migration(struct page *page, struct page *newpage) 116 { 117 return 0; 118 } 119 120 static inline void mem_cgroup_end_migration(struct page *page) 121 { 122 } 123 124 static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem) 125 { 126 return 0; 127 } 128 129 static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem) 130 { 131 return 0; 132 } 133 134 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) 135 { 136 return 0; 137 } 138 139 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, 140 int priority) 141 { 142 } 143 144 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, 145 int priority) 146 { 147 } 148 149 static 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