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>
23 #include <linux/vm_event_item.h>
30 /* Stats that can be updated by kernel. */
31 enum mem_cgroup_page_stat_item {
32 MEMCG_NR_FILE_MAPPED, /* # of pages charged as file rss */
35 extern unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
36 struct list_head *dst,
37 unsigned long *scanned, int order,
38 int mode, struct zone *z,
39 struct mem_cgroup *mem_cont,
40 int active, int file);
42 #ifdef CONFIG_CGROUP_MEM_RES_CTLR
44 * All "charge" functions with gfp_mask should use GFP_KERNEL or
45 * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't
46 * alloc memory but reclaims memory from all available zones. So, "where I want
47 * memory from" bits of gfp_mask has no meaning. So any bits of that field is
48 * available but adding a rule is better. charge functions' gfp_mask should
49 * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous
51 * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.)
54 extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
56 /* for swap handling */
57 extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
58 struct page *page, gfp_t mask, struct mem_cgroup **ptr);
59 extern void mem_cgroup_commit_charge_swapin(struct page *page,
60 struct mem_cgroup *ptr);
61 extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr);
63 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
65 extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru);
66 extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru);
67 extern void mem_cgroup_rotate_reclaimable_page(struct page *page);
68 extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru);
69 extern void mem_cgroup_del_lru(struct page *page);
70 extern void mem_cgroup_move_lists(struct page *page,
71 enum lru_list from, enum lru_list to);
73 /* For coalescing uncharge for reducing memcg' overhead*/
74 extern void mem_cgroup_uncharge_start(void);
75 extern void mem_cgroup_uncharge_end(void);
77 extern void mem_cgroup_uncharge_page(struct page *page);
78 extern void mem_cgroup_uncharge_cache_page(struct page *page);
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);
85 extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm);
88 int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
90 struct mem_cgroup *mem;
92 mem = mem_cgroup_from_task(rcu_dereference((mm)->owner));
97 extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem);
100 mem_cgroup_prepare_migration(struct page *page,
101 struct page *newpage, struct mem_cgroup **ptr, gfp_t gfp_mask);
102 extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
103 struct page *oldpage, struct page *newpage, bool migration_ok);
106 * For memory reclaim.
108 int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg);
109 int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg);
110 int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
111 unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg,
112 int nid, int zid, unsigned int lrumask);
113 struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg,
115 struct zone_reclaim_stat*
116 mem_cgroup_get_reclaim_stat_from_page(struct page *page);
117 extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
118 struct task_struct *p);
120 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
121 extern int do_swap_account;
124 static inline bool mem_cgroup_disabled(void)
126 if (mem_cgroup_subsys.disabled)
131 void mem_cgroup_update_page_stat(struct page *page,
132 enum mem_cgroup_page_stat_item idx,
135 static inline void mem_cgroup_inc_page_stat(struct page *page,
136 enum mem_cgroup_page_stat_item idx)
138 mem_cgroup_update_page_stat(page, idx, 1);
141 static inline void mem_cgroup_dec_page_stat(struct page *page,
142 enum mem_cgroup_page_stat_item idx)
144 mem_cgroup_update_page_stat(page, idx, -1);
147 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
149 unsigned long *total_scanned);
150 u64 mem_cgroup_get_limit(struct mem_cgroup *mem);
152 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx);
153 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
154 void mem_cgroup_split_huge_fixup(struct page *head, struct page *tail);
157 #ifdef CONFIG_DEBUG_VM
158 bool mem_cgroup_bad_page_check(struct page *page);
159 void mem_cgroup_print_bad_page(struct page *page);
161 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
164 static inline int mem_cgroup_newpage_charge(struct page *page,
165 struct mm_struct *mm, gfp_t gfp_mask)
170 static inline int mem_cgroup_cache_charge(struct page *page,
171 struct mm_struct *mm, gfp_t gfp_mask)
176 static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
177 struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr)
182 static inline void mem_cgroup_commit_charge_swapin(struct page *page,
183 struct mem_cgroup *ptr)
187 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr)
191 static inline void mem_cgroup_uncharge_start(void)
195 static inline void mem_cgroup_uncharge_end(void)
199 static inline void mem_cgroup_uncharge_page(struct page *page)
203 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
207 static inline void mem_cgroup_add_lru_list(struct page *page, int lru)
211 static inline void mem_cgroup_del_lru_list(struct page *page, int lru)
216 static inline void mem_cgroup_rotate_reclaimable_page(struct page *page)
221 static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru)
226 static inline void mem_cgroup_del_lru(struct page *page)
232 mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to)
236 static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
241 static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm)
246 static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
251 static inline int task_in_mem_cgroup(struct task_struct *task,
252 const struct mem_cgroup *mem)
257 static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem)
263 mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
264 struct mem_cgroup **ptr, gfp_t gfp_mask)
269 static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
270 struct page *oldpage, struct page *newpage, bool migration_ok)
274 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
279 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
284 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
289 static inline bool mem_cgroup_disabled(void)
295 mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg)
301 mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg)
306 static inline unsigned long
307 mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, int nid, int zid,
308 unsigned int lru_mask)
314 static inline struct zone_reclaim_stat*
315 mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone)
320 static inline struct zone_reclaim_stat*
321 mem_cgroup_get_reclaim_stat_from_page(struct page *page)
327 mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
331 static inline void mem_cgroup_inc_page_stat(struct page *page,
332 enum mem_cgroup_page_stat_item idx)
336 static inline void mem_cgroup_dec_page_stat(struct page *page,
337 enum mem_cgroup_page_stat_item idx)
342 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
344 unsigned long *total_scanned)
350 u64 mem_cgroup_get_limit(struct mem_cgroup *mem)
355 static inline void mem_cgroup_split_huge_fixup(struct page *head,
361 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
364 #endif /* CONFIG_CGROUP_MEM_CONT */
366 #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM)
368 mem_cgroup_bad_page_check(struct page *page)
374 mem_cgroup_print_bad_page(struct page *page)
379 #endif /* _LINUX_MEMCONTROL_H */