1 /* memcontrol.h - Memory Controller
3 * Copyright IBM Corporation, 2007
4 * Author Balbir Singh <balbir@linux.vnet.ibm.com>
6 * Copyright 2007 OpenVZ SWsoft Inc
7 * Author: Pavel Emelianov <xemul@openvz.org>
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.
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.
20 #ifndef _LINUX_MEMCONTROL_H
21 #define _LINUX_MEMCONTROL_H
22 #include <linux/cgroup.h>
28 /* Stats that can be updated by kernel. */
29 enum mem_cgroup_page_stat_item {
30 MEMCG_NR_FILE_MAPPED, /* # of pages charged as file rss */
33 extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
34 struct list_head *dst,
35 unsigned long *scanned, int order,
36 int mode, struct zone *z,
37 struct mem_cgroup *mem_cont,
38 int active, int file);
40 #ifdef CONFIG_CGROUP_MEM_RES_CTLR
42 * All "charge" functions with gfp_mask should use GFP_KERNEL or
43 * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't
44 * alloc memory but reclaims memory from all available zones. So, "where I want
45 * memory from" bits of gfp_mask has no meaning. So any bits of that field is
46 * available but adding a rule is better. charge functions' gfp_mask should
47 * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous
49 * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.)
52 extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
54 /* for swap handling */
55 extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
56 struct page *page, gfp_t mask, struct mem_cgroup **ptr);
57 extern void mem_cgroup_commit_charge_swapin(struct page *page,
58 struct mem_cgroup *ptr);
59 extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr);
61 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
63 extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru);
64 extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru);
65 extern void mem_cgroup_rotate_reclaimable_page(struct page *page);
66 extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru);
67 extern void mem_cgroup_del_lru(struct page *page);
68 extern void mem_cgroup_move_lists(struct page *page,
69 enum lru_list from, enum lru_list to);
71 /* For coalescing uncharge for reducing memcg' overhead*/
72 extern void mem_cgroup_uncharge_start(void);
73 extern void mem_cgroup_uncharge_end(void);
75 extern void mem_cgroup_uncharge_page(struct page *page);
76 extern void mem_cgroup_uncharge_cache_page(struct page *page);
77 extern int mem_cgroup_shmem_charge_fallback(struct page *page,
78 struct mm_struct *mm, gfp_t gfp_mask);
80 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
81 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
83 extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page);
84 extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
87 int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
89 struct mem_cgroup *mem;
91 mem = mem_cgroup_from_task(rcu_dereference((mm)->owner));
96 extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem);
99 mem_cgroup_prepare_migration(struct page *page,
100 struct page *newpage, struct mem_cgroup **ptr, gfp_t gfp_mask);
101 extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
102 struct page *oldpage, struct page *newpage, bool migration_ok);
105 * For memory reclaim.
107 int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg);
108 int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg);
109 unsigned long mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg,
112 struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg,
114 struct zone_reclaim_stat*
115 mem_cgroup_get_reclaim_stat_from_page(struct page *page);
116 extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
117 struct task_struct *p);
119 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
120 extern int do_swap_account;
123 static inline bool mem_cgroup_disabled(void)
125 if (mem_cgroup_subsys.disabled)
130 void mem_cgroup_update_page_stat(struct page *page,
131 enum mem_cgroup_page_stat_item idx,
134 static inline void mem_cgroup_inc_page_stat(struct page *page,
135 enum mem_cgroup_page_stat_item idx)
137 mem_cgroup_update_page_stat(page, idx, 1);
140 static inline void mem_cgroup_dec_page_stat(struct page *page,
141 enum mem_cgroup_page_stat_item idx)
143 mem_cgroup_update_page_stat(page, idx, -1);
146 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
148 u64 mem_cgroup_get_limit(struct mem_cgroup *mem);
150 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
151 void mem_cgroup_split_huge_fixup(struct page *head, struct page *tail);
154 #ifdef CONFIG_DEBUG_VM
155 bool mem_cgroup_bad_page_check(struct page *page);
156 void mem_cgroup_print_bad_page(struct page *page);
158 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
161 static inline int mem_cgroup_newpage_charge(struct page *page,
162 struct mm_struct *mm, gfp_t gfp_mask)
167 static inline int mem_cgroup_cache_charge(struct page *page,
168 struct mm_struct *mm, gfp_t gfp_mask)
173 static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
174 struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr)
179 static inline void mem_cgroup_commit_charge_swapin(struct page *page,
180 struct mem_cgroup *ptr)
184 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr)
188 static inline void mem_cgroup_uncharge_start(void)
192 static inline void mem_cgroup_uncharge_end(void)
196 static inline void mem_cgroup_uncharge_page(struct page *page)
200 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
204 static inline int mem_cgroup_shmem_charge_fallback(struct page *page,
205 struct mm_struct *mm, gfp_t gfp_mask)
210 static inline void mem_cgroup_add_lru_list(struct page *page, int lru)
214 static inline void mem_cgroup_del_lru_list(struct page *page, int lru)
219 static inline inline void mem_cgroup_rotate_reclaimable_page(struct page *page)
224 static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru)
229 static inline void mem_cgroup_del_lru(struct page *page)
235 mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to)
239 static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
244 static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
249 static inline int task_in_mem_cgroup(struct task_struct *task,
250 const struct mem_cgroup *mem)
255 static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem)
261 mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
262 struct mem_cgroup **ptr, gfp_t gfp_mask)
267 static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
268 struct page *oldpage, struct page *newpage, bool migration_ok)
272 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
277 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
282 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
287 static inline bool mem_cgroup_disabled(void)
293 mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg)
299 mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg)
304 static inline unsigned long
305 mem_cgroup_zone_nr_pages(struct mem_cgroup *memcg, struct zone *zone,
312 static inline struct zone_reclaim_stat*
313 mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone)
318 static inline struct zone_reclaim_stat*
319 mem_cgroup_get_reclaim_stat_from_page(struct page *page)
325 mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
329 static inline void mem_cgroup_inc_page_stat(struct page *page,
330 enum mem_cgroup_page_stat_item idx)
334 static inline void mem_cgroup_dec_page_stat(struct page *page,
335 enum mem_cgroup_page_stat_item idx)
340 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
347 u64 mem_cgroup_get_limit(struct mem_cgroup *mem)
352 static inline void mem_cgroup_split_huge_fixup(struct page *head,
357 #endif /* CONFIG_CGROUP_MEM_CONT */
359 #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM)
361 mem_cgroup_bad_page_check(struct page *page)
367 mem_cgroup_print_bad_page(struct page *page)
372 #endif /* _LINUX_MEMCONTROL_H */