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 #define vm_match_cgroup(mm, cgroup) \ 55 ((cgroup) == rcu_dereference((mm)->mem_cgroup)) 56 57 extern int mem_cgroup_prepare_migration(struct page *page); 58 extern void mem_cgroup_end_migration(struct page *page); 59 extern void mem_cgroup_page_migration(struct page *page, struct page *newpage); 60 61 /* 62 * For memory reclaim. 63 */ 64 extern int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem); 65 extern long mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem); 66 67 extern int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem); 68 extern void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, 69 int priority); 70 extern void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, 71 int priority); 72 73 extern long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem, 74 struct zone *zone, int priority); 75 extern long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem, 76 struct zone *zone, int priority); 77 78 #else /* CONFIG_CGROUP_MEM_CONT */ 79 static inline void mm_init_cgroup(struct mm_struct *mm, 80 struct task_struct *p) 81 { 82 } 83 84 static inline void mm_free_cgroup(struct mm_struct *mm) 85 { 86 } 87 88 static inline void page_assign_page_cgroup(struct page *page, 89 struct page_cgroup *pc) 90 { 91 } 92 93 static inline struct page_cgroup *page_get_page_cgroup(struct page *page) 94 { 95 return NULL; 96 } 97 98 static inline int mem_cgroup_charge(struct page *page, struct mm_struct *mm, 99 gfp_t gfp_mask) 100 { 101 return 0; 102 } 103 104 static inline void mem_cgroup_uncharge(struct page_cgroup *pc) 105 { 106 } 107 108 static inline void mem_cgroup_uncharge_page(struct page *page) 109 { 110 } 111 112 static inline void mem_cgroup_move_lists(struct page_cgroup *pc, 113 bool active) 114 { 115 } 116 117 static inline int mem_cgroup_cache_charge(struct page *page, 118 struct mm_struct *mm, 119 gfp_t gfp_mask) 120 { 121 return 0; 122 } 123 124 static inline int vm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem) 125 { 126 return 1; 127 } 128 129 static inline int task_in_mem_cgroup(struct task_struct *task, 130 const struct mem_cgroup *mem) 131 { 132 return 1; 133 } 134 135 static inline int mem_cgroup_prepare_migration(struct page *page) 136 { 137 return 0; 138 } 139 140 static inline void mem_cgroup_end_migration(struct page *page) 141 { 142 } 143 144 static inline void 145 mem_cgroup_page_migration(struct page *page, struct page *newpage) 146 { 147 } 148 149 static inline int mem_cgroup_calc_mapped_ratio(struct mem_cgroup *mem) 150 { 151 return 0; 152 } 153 154 static inline int mem_cgroup_reclaim_imbalance(struct mem_cgroup *mem) 155 { 156 return 0; 157 } 158 159 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem) 160 { 161 return 0; 162 } 163 164 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem, 165 int priority) 166 { 167 } 168 169 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem, 170 int priority) 171 { 172 } 173 174 static inline long mem_cgroup_calc_reclaim_active(struct mem_cgroup *mem, 175 struct zone *zone, int priority) 176 { 177 return 0; 178 } 179 180 static inline long mem_cgroup_calc_reclaim_inactive(struct mem_cgroup *mem, 181 struct zone *zone, int priority) 182 { 183 return 0; 184 } 185 #endif /* CONFIG_CGROUP_MEM_CONT */ 186 187 #endif /* _LINUX_MEMCONTROL_H */ 188 189