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,
82 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *memcg);
84 extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page);
85 extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
86 extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm);
88 extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg);
89 extern struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont);
92 int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
94 struct mem_cgroup *memcg;
96 memcg = mem_cgroup_from_task(rcu_dereference((mm)->owner));
98 return cgroup == memcg;
101 extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *memcg);
104 mem_cgroup_prepare_migration(struct page *page,
105 struct page *newpage, struct mem_cgroup **memcgp, gfp_t gfp_mask);
106 extern void mem_cgroup_end_migration(struct mem_cgroup *memcg,
107 struct page *oldpage, struct page *newpage, bool migration_ok);
109 struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *,
111 struct mem_cgroup_reclaim_cookie *);
112 void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *);
115 * For memory reclaim.
117 int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg,
119 int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg,
121 int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
122 unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg,
123 int nid, int zid, unsigned int lrumask);
124 struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg,
126 struct zone_reclaim_stat*
127 mem_cgroup_get_reclaim_stat_from_page(struct page *page);
128 extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
129 struct task_struct *p);
130 extern void mem_cgroup_replace_page_cache(struct page *oldpage,
131 struct page *newpage);
133 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
134 extern int do_swap_account;
137 static inline bool mem_cgroup_disabled(void)
139 if (mem_cgroup_subsys.disabled)
144 void __mem_cgroup_begin_update_page_stat(struct page *page, bool *locked,
145 unsigned long *flags);
147 extern atomic_t memcg_moving;
149 static inline void mem_cgroup_begin_update_page_stat(struct page *page,
150 bool *locked, unsigned long *flags)
152 if (mem_cgroup_disabled())
156 if (atomic_read(&memcg_moving))
157 __mem_cgroup_begin_update_page_stat(page, locked, flags);
160 void __mem_cgroup_end_update_page_stat(struct page *page,
161 unsigned long *flags);
162 static inline void mem_cgroup_end_update_page_stat(struct page *page,
163 bool *locked, unsigned long *flags)
165 if (mem_cgroup_disabled())
168 __mem_cgroup_end_update_page_stat(page, flags);
172 void mem_cgroup_update_page_stat(struct page *page,
173 enum mem_cgroup_page_stat_item idx,
176 static inline void mem_cgroup_inc_page_stat(struct page *page,
177 enum mem_cgroup_page_stat_item idx)
179 mem_cgroup_update_page_stat(page, idx, 1);
182 static inline void mem_cgroup_dec_page_stat(struct page *page,
183 enum mem_cgroup_page_stat_item idx)
185 mem_cgroup_update_page_stat(page, idx, -1);
188 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
190 unsigned long *total_scanned);
191 u64 mem_cgroup_get_limit(struct mem_cgroup *memcg);
193 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx);
194 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
195 void mem_cgroup_split_huge_fixup(struct page *head);
198 #ifdef CONFIG_DEBUG_VM
199 bool mem_cgroup_bad_page_check(struct page *page);
200 void mem_cgroup_print_bad_page(struct page *page);
202 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
205 static inline int mem_cgroup_newpage_charge(struct page *page,
206 struct mm_struct *mm, gfp_t gfp_mask)
211 static inline int mem_cgroup_cache_charge(struct page *page,
212 struct mm_struct *mm, gfp_t gfp_mask)
217 static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
218 struct page *page, gfp_t gfp_mask, struct mem_cgroup **memcgp)
223 static inline void mem_cgroup_commit_charge_swapin(struct page *page,
224 struct mem_cgroup *memcg)
228 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg)
232 static inline void mem_cgroup_uncharge_start(void)
236 static inline void mem_cgroup_uncharge_end(void)
240 static inline void mem_cgroup_uncharge_page(struct page *page)
244 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
248 static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone,
249 struct mem_cgroup *memcg)
251 return &zone->lruvec;
254 static inline struct lruvec *mem_cgroup_lru_add_list(struct zone *zone,
258 return &zone->lruvec;
261 static inline void mem_cgroup_lru_del_list(struct page *page, enum lru_list lru)
265 static inline void mem_cgroup_lru_del(struct page *page)
269 static inline struct lruvec *mem_cgroup_lru_move_lists(struct zone *zone,
274 return &zone->lruvec;
277 static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
282 static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm)
287 static inline int mm_match_cgroup(struct mm_struct *mm,
288 struct mem_cgroup *memcg)
293 static inline int task_in_mem_cgroup(struct task_struct *task,
294 const struct mem_cgroup *memcg)
299 static inline struct cgroup_subsys_state
300 *mem_cgroup_css(struct mem_cgroup *memcg)
306 mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
307 struct mem_cgroup **memcgp, gfp_t gfp_mask)
312 static inline void mem_cgroup_end_migration(struct mem_cgroup *memcg,
313 struct page *oldpage, struct page *newpage, bool migration_ok)
317 static inline struct mem_cgroup *
318 mem_cgroup_iter(struct mem_cgroup *root,
319 struct mem_cgroup *prev,
320 struct mem_cgroup_reclaim_cookie *reclaim)
325 static inline void mem_cgroup_iter_break(struct mem_cgroup *root,
326 struct mem_cgroup *prev)
330 static inline bool mem_cgroup_disabled(void)
336 mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, struct zone *zone)
342 mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg, struct zone *zone)
347 static inline unsigned long
348 mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, int nid, int zid,
349 unsigned int lru_mask)
355 static inline struct zone_reclaim_stat*
356 mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone)
361 static inline struct zone_reclaim_stat*
362 mem_cgroup_get_reclaim_stat_from_page(struct page *page)
368 mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
372 static inline void mem_cgroup_begin_update_page_stat(struct page *page,
373 bool *locked, unsigned long *flags)
377 static inline void mem_cgroup_end_update_page_stat(struct page *page,
378 bool *locked, unsigned long *flags)
382 static inline void mem_cgroup_inc_page_stat(struct page *page,
383 enum mem_cgroup_page_stat_item idx)
387 static inline void mem_cgroup_dec_page_stat(struct page *page,
388 enum mem_cgroup_page_stat_item idx)
393 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
395 unsigned long *total_scanned)
401 u64 mem_cgroup_get_limit(struct mem_cgroup *memcg)
406 static inline void mem_cgroup_split_huge_fixup(struct page *head)
411 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
414 static inline void mem_cgroup_replace_page_cache(struct page *oldpage,
415 struct page *newpage)
418 #endif /* CONFIG_CGROUP_MEM_RES_CTLR */
420 #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM)
422 mem_cgroup_bad_page_check(struct page *page)
428 mem_cgroup_print_bad_page(struct page *page)
440 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM
441 void sock_update_memcg(struct sock *sk);
442 void sock_release_memcg(struct sock *sk);
444 static inline void sock_update_memcg(struct sock *sk)
447 static inline void sock_release_memcg(struct sock *sk)
450 #endif /* CONFIG_CGROUP_MEM_RES_CTLR_KMEM */
451 #endif /* _LINUX_MEMCONTROL_H */