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 struct mem_cgroup_reclaim_cookie {
38 unsigned int generation;
41 #ifdef CONFIG_CGROUP_MEM_RES_CTLR
43 * All "charge" functions with gfp_mask should use GFP_KERNEL or
44 * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't
45 * alloc memory but reclaims memory from all available zones. So, "where I want
46 * memory from" bits of gfp_mask has no meaning. So any bits of that field is
47 * available but adding a rule is better. charge functions' gfp_mask should
48 * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous
50 * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.)
53 extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
55 /* for swap handling */
56 extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
57 struct page *page, gfp_t mask, struct mem_cgroup **memcgp);
58 extern void mem_cgroup_commit_charge_swapin(struct page *page,
59 struct mem_cgroup *memcg);
60 extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg);
62 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
65 struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *);
66 struct lruvec *mem_cgroup_lru_add_list(struct zone *, struct page *,
68 void mem_cgroup_lru_del_list(struct page *, enum lru_list);
69 void mem_cgroup_lru_del(struct page *);
70 struct lruvec *mem_cgroup_lru_move_lists(struct zone *, struct page *,
71 enum lru_list, enum lru_list);
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 *memcg, gfp_t gfp_mask);
81 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *memcg);
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);
87 extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg);
88 extern struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont);
91 int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
93 struct mem_cgroup *memcg;
95 memcg = mem_cgroup_from_task(rcu_dereference((mm)->owner));
97 return cgroup == memcg;
100 extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg);
103 mem_cgroup_prepare_migration(struct page *page,
104 struct page *newpage, struct mem_cgroup **memcgp, gfp_t gfp_mask);
105 extern void mem_cgroup_end_migration(struct mem_cgroup *memcg,
106 struct page *oldpage, struct page *newpage, bool migration_ok);
108 struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *,
110 struct mem_cgroup_reclaim_cookie *);
111 void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *);
114 * For memory reclaim.
116 int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg,
118 int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg,
120 int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
121 unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg,
122 int nid, int zid, unsigned int lrumask);
123 struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg,
125 struct zone_reclaim_stat*
126 mem_cgroup_get_reclaim_stat_from_page(struct page *page);
127 extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
128 struct task_struct *p);
130 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
131 extern int do_swap_account;
134 static inline bool mem_cgroup_disabled(void)
136 if (mem_cgroup_subsys.disabled)
141 void mem_cgroup_update_page_stat(struct page *page,
142 enum mem_cgroup_page_stat_item idx,
145 static inline void mem_cgroup_inc_page_stat(struct page *page,
146 enum mem_cgroup_page_stat_item idx)
148 mem_cgroup_update_page_stat(page, idx, 1);
151 static inline void mem_cgroup_dec_page_stat(struct page *page,
152 enum mem_cgroup_page_stat_item idx)
154 mem_cgroup_update_page_stat(page, idx, -1);
157 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
159 unsigned long *total_scanned);
160 u64 mem_cgroup_get_limit(struct mem_cgroup *memcg);
162 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx);
163 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
164 void mem_cgroup_split_huge_fixup(struct page *head);
167 #ifdef CONFIG_DEBUG_VM
168 bool mem_cgroup_bad_page_check(struct page *page);
169 void mem_cgroup_print_bad_page(struct page *page);
171 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
174 static inline int mem_cgroup_newpage_charge(struct page *page,
175 struct mm_struct *mm, gfp_t gfp_mask)
180 static inline int mem_cgroup_cache_charge(struct page *page,
181 struct mm_struct *mm, gfp_t gfp_mask)
186 static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
187 struct page *page, gfp_t gfp_mask, struct mem_cgroup **memcgp)
192 static inline void mem_cgroup_commit_charge_swapin(struct page *page,
193 struct mem_cgroup *memcg)
197 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg)
201 static inline void mem_cgroup_uncharge_start(void)
205 static inline void mem_cgroup_uncharge_end(void)
209 static inline void mem_cgroup_uncharge_page(struct page *page)
213 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
217 static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone,
218 struct mem_cgroup *memcg)
220 return &zone->lruvec;
223 static inline struct lruvec *mem_cgroup_lru_add_list(struct zone *zone,
227 return &zone->lruvec;
230 static inline void mem_cgroup_lru_del_list(struct page *page, enum lru_list lru)
234 static inline void mem_cgroup_lru_del(struct page *page)
238 static inline struct lruvec *mem_cgroup_lru_move_lists(struct zone *zone,
243 return &zone->lruvec;
246 static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
251 static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm)
256 static inline int mm_match_cgroup(struct mm_struct *mm,
257 struct mem_cgroup *memcg)
262 static inline int task_in_mem_cgroup(struct task_struct *task,
263 const struct mem_cgroup *memcg)
268 static inline struct cgroup_subsys_state
269 *mem_cgroup_css(struct mem_cgroup *memcg)
275 mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
276 struct mem_cgroup **memcgp, gfp_t gfp_mask)
281 static inline void mem_cgroup_end_migration(struct mem_cgroup *memcg,
282 struct page *oldpage, struct page *newpage, bool migration_ok)
286 static inline struct mem_cgroup *
287 mem_cgroup_iter(struct mem_cgroup *root,
288 struct mem_cgroup *prev,
289 struct mem_cgroup_reclaim_cookie *reclaim)
294 static inline void mem_cgroup_iter_break(struct mem_cgroup *root,
295 struct mem_cgroup *prev)
299 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *memcg)
304 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *memcg,
309 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *memcg,
314 static inline bool mem_cgroup_disabled(void)
320 mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, struct zone *zone)
326 mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg, struct zone *zone)
331 static inline unsigned long
332 mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, int nid, int zid,
333 unsigned int lru_mask)
339 static inline struct zone_reclaim_stat*
340 mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone)
345 static inline struct zone_reclaim_stat*
346 mem_cgroup_get_reclaim_stat_from_page(struct page *page)
352 mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
356 static inline void mem_cgroup_inc_page_stat(struct page *page,
357 enum mem_cgroup_page_stat_item idx)
361 static inline void mem_cgroup_dec_page_stat(struct page *page,
362 enum mem_cgroup_page_stat_item idx)
367 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
369 unsigned long *total_scanned)
375 u64 mem_cgroup_get_limit(struct mem_cgroup *memcg)
380 static inline void mem_cgroup_split_huge_fixup(struct page *head)
385 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
388 #endif /* CONFIG_CGROUP_MEM_CONT */
390 #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM)
392 mem_cgroup_bad_page_check(struct page *page)
398 mem_cgroup_print_bad_page(struct page *page)
411 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM
412 void sock_update_memcg(struct sock *sk);
413 void sock_release_memcg(struct sock *sk);
415 static inline void sock_update_memcg(struct sock *sk)
418 static inline void sock_release_memcg(struct sock *sk)
421 #endif /* CONFIG_CGROUP_MEM_RES_CTLR_KMEM */
422 #endif /* CONFIG_INET */
423 #endif /* _LINUX_MEMCONTROL_H */