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 struct lruvec *mem_cgroup_lru_move_lists(struct zone *, struct page *,
70 enum lru_list, enum lru_list);
72 /* For coalescing uncharge for reducing memcg' overhead*/
73 extern void mem_cgroup_uncharge_start(void);
74 extern void mem_cgroup_uncharge_end(void);
76 extern void mem_cgroup_uncharge_page(struct page *page);
77 extern void mem_cgroup_uncharge_cache_page(struct page *page);
79 extern void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask,
81 bool __mem_cgroup_same_or_subtree(const struct mem_cgroup *root_memcg,
82 struct mem_cgroup *memcg);
83 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *memcg);
85 extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page);
86 extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
87 extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm);
89 extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg);
90 extern struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont);
93 int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
95 struct mem_cgroup *memcg;
99 memcg = mem_cgroup_from_task(rcu_dereference((mm)->owner));
100 match = __mem_cgroup_same_or_subtree(cgroup, memcg);
105 extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg);
108 mem_cgroup_prepare_migration(struct page *page,
109 struct page *newpage, struct mem_cgroup **memcgp, gfp_t gfp_mask);
110 extern void mem_cgroup_end_migration(struct mem_cgroup *memcg,
111 struct page *oldpage, struct page *newpage, bool migration_ok);
113 struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *,
115 struct mem_cgroup_reclaim_cookie *);
116 void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *);
119 * For memory reclaim.
121 int mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec);
122 int mem_cgroup_inactive_file_is_low(struct lruvec *lruvec);
123 int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
124 unsigned long mem_cgroup_get_lruvec_size(struct lruvec *lruvec, enum lru_list);
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);
129 extern void mem_cgroup_replace_page_cache(struct page *oldpage,
130 struct page *newpage);
132 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
133 extern int do_swap_account;
136 static inline bool mem_cgroup_disabled(void)
138 if (mem_cgroup_subsys.disabled)
143 void __mem_cgroup_begin_update_page_stat(struct page *page, bool *locked,
144 unsigned long *flags);
146 extern atomic_t memcg_moving;
148 static inline void mem_cgroup_begin_update_page_stat(struct page *page,
149 bool *locked, unsigned long *flags)
151 if (mem_cgroup_disabled())
155 if (atomic_read(&memcg_moving))
156 __mem_cgroup_begin_update_page_stat(page, locked, flags);
159 void __mem_cgroup_end_update_page_stat(struct page *page,
160 unsigned long *flags);
161 static inline void mem_cgroup_end_update_page_stat(struct page *page,
162 bool *locked, unsigned long *flags)
164 if (mem_cgroup_disabled())
167 __mem_cgroup_end_update_page_stat(page, flags);
171 void mem_cgroup_update_page_stat(struct page *page,
172 enum mem_cgroup_page_stat_item idx,
175 static inline void mem_cgroup_inc_page_stat(struct page *page,
176 enum mem_cgroup_page_stat_item idx)
178 mem_cgroup_update_page_stat(page, idx, 1);
181 static inline void mem_cgroup_dec_page_stat(struct page *page,
182 enum mem_cgroup_page_stat_item idx)
184 mem_cgroup_update_page_stat(page, idx, -1);
187 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
189 unsigned long *total_scanned);
190 u64 mem_cgroup_get_limit(struct mem_cgroup *memcg);
192 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx);
193 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
194 void mem_cgroup_split_huge_fixup(struct page *head);
197 #ifdef CONFIG_DEBUG_VM
198 bool mem_cgroup_bad_page_check(struct page *page);
199 void mem_cgroup_print_bad_page(struct page *page);
201 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
204 static inline int mem_cgroup_newpage_charge(struct page *page,
205 struct mm_struct *mm, gfp_t gfp_mask)
210 static inline int mem_cgroup_cache_charge(struct page *page,
211 struct mm_struct *mm, gfp_t gfp_mask)
216 static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
217 struct page *page, gfp_t gfp_mask, struct mem_cgroup **memcgp)
222 static inline void mem_cgroup_commit_charge_swapin(struct page *page,
223 struct mem_cgroup *memcg)
227 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg)
231 static inline void mem_cgroup_uncharge_start(void)
235 static inline void mem_cgroup_uncharge_end(void)
239 static inline void mem_cgroup_uncharge_page(struct page *page)
243 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
247 static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone,
248 struct mem_cgroup *memcg)
250 return &zone->lruvec;
253 static inline struct lruvec *mem_cgroup_lru_add_list(struct zone *zone,
257 return &zone->lruvec;
260 static inline void mem_cgroup_lru_del_list(struct page *page, enum lru_list lru)
264 static inline struct lruvec *mem_cgroup_lru_move_lists(struct zone *zone,
269 return &zone->lruvec;
272 static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
277 static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm)
282 static inline int mm_match_cgroup(struct mm_struct *mm,
283 struct mem_cgroup *memcg)
288 static inline int task_in_mem_cgroup(struct task_struct *task,
289 const struct mem_cgroup *memcg)
294 static inline struct cgroup_subsys_state
295 *mem_cgroup_css(struct mem_cgroup *memcg)
301 mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
302 struct mem_cgroup **memcgp, gfp_t gfp_mask)
307 static inline void mem_cgroup_end_migration(struct mem_cgroup *memcg,
308 struct page *oldpage, struct page *newpage, bool migration_ok)
312 static inline struct mem_cgroup *
313 mem_cgroup_iter(struct mem_cgroup *root,
314 struct mem_cgroup *prev,
315 struct mem_cgroup_reclaim_cookie *reclaim)
320 static inline void mem_cgroup_iter_break(struct mem_cgroup *root,
321 struct mem_cgroup *prev)
325 static inline bool mem_cgroup_disabled(void)
331 mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
337 mem_cgroup_inactive_file_is_low(struct lruvec *lruvec)
342 static inline unsigned long
343 mem_cgroup_get_lruvec_size(struct lruvec *lruvec, enum lru_list lru)
348 static inline struct zone_reclaim_stat*
349 mem_cgroup_get_reclaim_stat_from_page(struct page *page)
355 mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
359 static inline void mem_cgroup_begin_update_page_stat(struct page *page,
360 bool *locked, unsigned long *flags)
364 static inline void mem_cgroup_end_update_page_stat(struct page *page,
365 bool *locked, unsigned long *flags)
369 static inline void mem_cgroup_inc_page_stat(struct page *page,
370 enum mem_cgroup_page_stat_item idx)
374 static inline void mem_cgroup_dec_page_stat(struct page *page,
375 enum mem_cgroup_page_stat_item idx)
380 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
382 unsigned long *total_scanned)
388 u64 mem_cgroup_get_limit(struct mem_cgroup *memcg)
393 static inline void mem_cgroup_split_huge_fixup(struct page *head)
398 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
401 static inline void mem_cgroup_replace_page_cache(struct page *oldpage,
402 struct page *newpage)
405 #endif /* CONFIG_CGROUP_MEM_RES_CTLR */
407 #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM)
409 mem_cgroup_bad_page_check(struct page *page)
415 mem_cgroup_print_bad_page(struct page *page)
427 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM
428 void sock_update_memcg(struct sock *sk);
429 void sock_release_memcg(struct sock *sk);
431 static inline void sock_update_memcg(struct sock *sk)
434 static inline void sock_release_memcg(struct sock *sk)
437 #endif /* CONFIG_CGROUP_MEM_RES_CTLR_KMEM */
438 #endif /* _LINUX_MEMCONTROL_H */