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 void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p); 31 extern void mm_free_cgroup(struct mm_struct *mm); 32 33 #define page_reset_bad_cgroup(page) ((page)->page_cgroup = 0) 34 35 extern struct page_cgroup *page_get_page_cgroup(struct page *page); 36 extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm, 37 gfp_t gfp_mask); 38 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, 39 gfp_t gfp_mask); 40 extern void mem_cgroup_uncharge_page(struct page *page); 41 extern void mem_cgroup_move_lists(struct page *page, bool active); 42 extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, 43 struct list_head *dst, 44 unsigned long *scanned, int order, 45 int mode, struct zone *z, 46 struct mem_cgroup *mem_cont, 47 int active); 48 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask); 49 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem); 50 51 #define mm_match_cgroup(mm, cgroup) \ 52 ((cgroup) == rcu_dereference((mm)->mem_cgroup)) 53 54 extern int mem_cgroup_prepare_migration(struct page *page); 55 extern void mem_cgroup_end_migration(struct page *page); 56 extern void mem_cgroup_page_migration(struct page *page, struct page *newpage); 57 58 /* 59 * For memory reclaim. 60 */ 61 extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem); 62 extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem); 63 64 extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem); 65 extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, 66 int priority); 67 extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, 68 int priority); 69 70 extern long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem, 71 struct zone *zone, int priority); 72 extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem, 73 struct zone *zone, int priority); 74 75 #else /* CONFIG_CGROUP_MEM_RES_CTLR */ 76 static inline void mm_init_cgroup(struct mm_struct *mm, 77 struct task_struct *p) 78 { 79 } 80 81 static inline void mm_free_cgroup(struct mm_struct *mm) 82 { 83 } 84 85 static inline void page_reset_bad_cgroup(struct page *page) 86 { 87 } 88 89 static inline struct page_cgroup *page_get_page_cgroup(struct page *page) 90 { 91 return NULL; 92 } 93 94 static inline int mem_cgroup_charge(struct page *page, 95 struct mm_struct *mm, gfp_t gfp_mask) 96 { 97 return 0; 98 } 99 100 static inline int mem_cgroup_cache_charge(struct page *page, 101 struct mm_struct *mm, gfp_t gfp_mask) 102 { 103 return 0; 104 } 105 106 static inline void mem_cgroup_uncharge_page(struct page *page) 107 { 108 } 109 110 static inline void mem_cgroup_move_lists(struct page *page, bool active) 111 { 112 } 113 114 static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem) 115 { 116 return 1; 117 } 118 119 static inline int task_in_mem_cgroup(struct task_struct *task, 120 const struct mem_cgroup *mem) 121 { 122 return 1; 123 } 124 125 static inline int mem_cgroup_prepare_migration(struct page *page) 126 { 127 return 0; 128 } 129 130 static inline void mem_cgroup_end_migration(struct page *page) 131 { 132 } 133 134 static inline void 135 mem_cgroup_page_migration(struct page *page, struct page *newpage) 136 { 137 } 138 139 static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem) 140 { 141 return 0; 142 } 143 144 static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem) 145 { 146 return 0; 147 } 148 149 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) 150 { 151 return 0; 152 } 153 154 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, 155 int priority) 156 { 157 } 158 159 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, 160 int priority) 161 { 162 } 163 164 static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem, 165 struct zone *zone, int priority) 166 { 167 return 0; 168 } 169 170 static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem, 171 struct zone *zone, int priority) 172 { 173 return 0; 174 } 175 #endif /* CONFIG_CGROUP_MEM_CONT */ 176 177 #endif /* _LINUX_MEMCONTROL_H */ 178 179