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 #include <linux/rcupdate.h> 24 #include <linux/mm.h> 25 26 struct mem_cgroup; 27 struct page_cgroup; 28 struct page; 29 struct mm_struct; 30 31 #ifdef CONFIG_CGROUP_MEM_CONT 32 33 extern void mm_init_cgroup(struct mm_struct *mm, struct task_struct *p); 34 extern void mm_free_cgroup(struct mm_struct *mm); 35 extern void page_assign_page_cgroup(struct page *page, 36 struct page_cgroup *pc); 37 extern struct page_cgroup *page_get_page_cgroup(struct page *page); 38 extern int mem_cgroup_charge(struct page *page, struct mm_struct *mm, 39 gfp_t gfp_mask); 40 extern void mem_cgroup_uncharge(struct page_cgroup *pc); 41 extern void mem_cgroup_uncharge_page(struct page *page); 42 extern void mem_cgroup_move_lists(struct page_cgroup *pc, bool active); 43 extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, 44 struct list_head *dst, 45 unsigned long *scanned, int order, 46 int mode, struct zone *z, 47 struct mem_cgroup *mem_cont, 48 int active); 49 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask); 50 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, 51 gfp_t gfp_mask); 52 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem); 53 54 static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm) 55 { 56 return rcu_dereference(mm->mem_cgroup); 57 } 58 59 extern int mem_cgroup_prepare_migration(struct page *page); 60 extern void mem_cgroup_end_migration(struct page *page); 61 extern void mem_cgroup_page_migration(struct page *page, struct page *newpage); 62 63 /* 64 * For memory reclaim. 65 */ 66 extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem); 67 extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem); 68 69 extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem); 70 extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, 71 int priority); 72 extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, 73 int priority); 74 75 extern long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem, 76 struct zone *zone, int priority); 77 extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem, 78 struct zone *zone, int priority); 79 80 #else /* CONFIG_CGROUP_MEM_CONT */ 81 static inline void mm_init_cgroup(struct mm_struct *mm, 82 struct task_struct *p) 83 { 84 } 85 86 static inline void mm_free_cgroup(struct mm_struct *mm) 87 { 88 } 89 90 static inline void page_assign_page_cgroup(struct page *page, 91 struct page_cgroup *pc) 92 { 93 } 94 95 static inline struct page_cgroup *page_get_page_cgroup(struct page *page) 96 { 97 return NULL; 98 } 99 100 static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm, 101 gfp_t gfp_mask) 102 { 103 return 0; 104 } 105 106 static inline void mem_cgroup_uncharge(struct page_cgroup *pc) 107 { 108 } 109 110 static inline void mem_cgroup_uncharge_page(struct page *page) 111 { 112 } 113 114 static inline void mem_cgroup_move_lists(struct page_cgroup *pc, 115 bool active) 116 { 117 } 118 119 static inline int mem_cgroup_cache_charge(struct page *page, 120 struct mm_struct *mm, 121 gfp_t gfp_mask) 122 { 123 return 0; 124 } 125 126 static inline struct mem_cgroup *mm_cgroup(const struct mm_struct *mm) 127 { 128 return NULL; 129 } 130 131 static inline int task_in_mem_cgroup(struct task_struct *task, 132 const struct mem_cgroup *mem) 133 { 134 return 1; 135 } 136 137 static inline int mem_cgroup_prepare_migration(struct page *page) 138 { 139 return 0; 140 } 141 142 static inline void mem_cgroup_end_migration(struct page *page) 143 { 144 } 145 146 static inline void 147 mem_cgroup_page_migration(struct page *page, struct page *newpage) 148 { 149 } 150 151 static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem) 152 { 153 return 0; 154 } 155 156 static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem) 157 { 158 return 0; 159 } 160 161 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) 162 { 163 return 0; 164 } 165 166 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, 167 int priority) 168 { 169 } 170 171 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, 172 int priority) 173 { 174 } 175 176 static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem, 177 struct zone *zone, int priority) 178 { 179 return 0; 180 } 181 182 static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem, 183 struct zone *zone, int priority) 184 { 185 return 0; 186 } 187 #endif /* CONFIG_CGROUP_MEM_CONT */ 188 189 #endif /* _LINUX_MEMCONTROL_H */ 190 191