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 #define page_reset_bad_cgroup(page) ((page)->page_cgroup = 0) 31 32 extern struct page_cgroup *page_get_page_cgroup(struct page *page); 33 extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm, 34 gfp_t gfp_mask); 35 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, 36 gfp_t gfp_mask); 37 extern void mem_cgroup_uncharge_page(struct page *page); 38 extern void mem_cgroup_move_lists(struct page *page, 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 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 mem_cgroup_prepare_migration(struct page *page); 54 extern void mem_cgroup_end_migration(struct page *page); 55 extern void mem_cgroup_page_migration(struct page *page, struct page *newpage); 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_active(struct mem_cgroup *mem, 70 struct zone *zone, int priority); 71 extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem, 72 struct zone *zone, int priority); 73 74 #else /* CONFIG_CGROUP_MEM_RES_CTLR */ 75 static inline void page_reset_bad_cgroup(struct page *page) 76 { 77 } 78 79 static inline struct page_cgroup *page_get_page_cgroup(struct page *page) 80 { 81 return NULL; 82 } 83 84 static inline int mem_cgroup_charge(struct page *page, 85 struct mm_struct *mm, gfp_t gfp_mask) 86 { 87 return 0; 88 } 89 90 static inline int mem_cgroup_cache_charge(struct page *page, 91 struct mm_struct *mm, gfp_t gfp_mask) 92 { 93 return 0; 94 } 95 96 static inline void mem_cgroup_uncharge_page(struct page *page) 97 { 98 } 99 100 static inline void mem_cgroup_move_lists(struct page *page, bool active) 101 { 102 } 103 104 static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem) 105 { 106 return 1; 107 } 108 109 static inline int task_in_mem_cgroup(struct task_struct *task, 110 const struct mem_cgroup *mem) 111 { 112 return 1; 113 } 114 115 static inline int mem_cgroup_prepare_migration(struct page *page) 116 { 117 return 0; 118 } 119 120 static inline void mem_cgroup_end_migration(struct page *page) 121 { 122 } 123 124 static inline void 125 mem_cgroup_page_migration(struct page *page, struct page *newpage) 126 { 127 } 128 129 static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem) 130 { 131 return 0; 132 } 133 134 static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem) 135 { 136 return 0; 137 } 138 139 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) 140 { 141 return 0; 142 } 143 144 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, 145 int priority) 146 { 147 } 148 149 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, 150 int priority) 151 { 152 } 153 154 static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem, 155 struct zone *zone, int priority) 156 { 157 return 0; 158 } 159 160 static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem, 161 struct zone *zone, int priority) 162 { 163 return 0; 164 } 165 #endif /* CONFIG_CGROUP_MEM_CONT */ 166 167 #endif /* _LINUX_MEMCONTROL_H */ 168 169