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 mem_cgroup *memcg,
123 int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg,
125 int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
126 unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg,
127 int nid, int zid, unsigned int lrumask);
128 struct zone_reclaim_stat*
129 mem_cgroup_get_reclaim_stat_from_page(struct page *page);
130 extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
131 struct task_struct *p);
132 extern void mem_cgroup_replace_page_cache(struct page *oldpage,
133 struct page *newpage);
135 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
136 extern int do_swap_account;
139 static inline bool mem_cgroup_disabled(void)
141 if (mem_cgroup_subsys.disabled)
146 void __mem_cgroup_begin_update_page_stat(struct page *page, bool *locked,
147 unsigned long *flags);
149 extern atomic_t memcg_moving;
151 static inline void mem_cgroup_begin_update_page_stat(struct page *page,
152 bool *locked, unsigned long *flags)
154 if (mem_cgroup_disabled())
158 if (atomic_read(&memcg_moving))
159 __mem_cgroup_begin_update_page_stat(page, locked, flags);
162 void __mem_cgroup_end_update_page_stat(struct page *page,
163 unsigned long *flags);
164 static inline void mem_cgroup_end_update_page_stat(struct page *page,
165 bool *locked, unsigned long *flags)
167 if (mem_cgroup_disabled())
170 __mem_cgroup_end_update_page_stat(page, flags);
174 void mem_cgroup_update_page_stat(struct page *page,
175 enum mem_cgroup_page_stat_item idx,
178 static inline void mem_cgroup_inc_page_stat(struct page *page,
179 enum mem_cgroup_page_stat_item idx)
181 mem_cgroup_update_page_stat(page, idx, 1);
184 static inline void mem_cgroup_dec_page_stat(struct page *page,
185 enum mem_cgroup_page_stat_item idx)
187 mem_cgroup_update_page_stat(page, idx, -1);
190 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
192 unsigned long *total_scanned);
193 u64 mem_cgroup_get_limit(struct mem_cgroup *memcg);
195 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx);
196 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
197 void mem_cgroup_split_huge_fixup(struct page *head);
200 #ifdef CONFIG_DEBUG_VM
201 bool mem_cgroup_bad_page_check(struct page *page);
202 void mem_cgroup_print_bad_page(struct page *page);
204 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
207 static inline int mem_cgroup_newpage_charge(struct page *page,
208 struct mm_struct *mm, gfp_t gfp_mask)
213 static inline int mem_cgroup_cache_charge(struct page *page,
214 struct mm_struct *mm, gfp_t gfp_mask)
219 static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
220 struct page *page, gfp_t gfp_mask, struct mem_cgroup **memcgp)
225 static inline void mem_cgroup_commit_charge_swapin(struct page *page,
226 struct mem_cgroup *memcg)
230 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *memcg)
234 static inline void mem_cgroup_uncharge_start(void)
238 static inline void mem_cgroup_uncharge_end(void)
242 static inline void mem_cgroup_uncharge_page(struct page *page)
246 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
250 static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone,
251 struct mem_cgroup *memcg)
253 return &zone->lruvec;
256 static inline struct lruvec *mem_cgroup_lru_add_list(struct zone *zone,
260 return &zone->lruvec;
263 static inline void mem_cgroup_lru_del_list(struct page *page, enum lru_list lru)
267 static inline struct lruvec *mem_cgroup_lru_move_lists(struct zone *zone,
272 return &zone->lruvec;
275 static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
280 static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm)
285 static inline int mm_match_cgroup(struct mm_struct *mm,
286 struct mem_cgroup *memcg)
291 static inline int task_in_mem_cgroup(struct task_struct *task,
292 const struct mem_cgroup *memcg)
297 static inline struct cgroup_subsys_state
298 *mem_cgroup_css(struct mem_cgroup *memcg)
304 mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
305 struct mem_cgroup **memcgp, gfp_t gfp_mask)
310 static inline void mem_cgroup_end_migration(struct mem_cgroup *memcg,
311 struct page *oldpage, struct page *newpage, bool migration_ok)
315 static inline struct mem_cgroup *
316 mem_cgroup_iter(struct mem_cgroup *root,
317 struct mem_cgroup *prev,
318 struct mem_cgroup_reclaim_cookie *reclaim)
323 static inline void mem_cgroup_iter_break(struct mem_cgroup *root,
324 struct mem_cgroup *prev)
328 static inline bool mem_cgroup_disabled(void)
334 mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg, struct zone *zone)
340 mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg, struct zone *zone)
345 static inline unsigned long
346 mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, int nid, int zid,
347 unsigned int lru_mask)
352 static inline struct zone_reclaim_stat*
353 mem_cgroup_get_reclaim_stat_from_page(struct page *page)
359 mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
363 static inline void mem_cgroup_begin_update_page_stat(struct page *page,
364 bool *locked, unsigned long *flags)
368 static inline void mem_cgroup_end_update_page_stat(struct page *page,
369 bool *locked, unsigned long *flags)
373 static inline void mem_cgroup_inc_page_stat(struct page *page,
374 enum mem_cgroup_page_stat_item idx)
378 static inline void mem_cgroup_dec_page_stat(struct page *page,
379 enum mem_cgroup_page_stat_item idx)
384 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
386 unsigned long *total_scanned)
392 u64 mem_cgroup_get_limit(struct mem_cgroup *memcg)
397 static inline void mem_cgroup_split_huge_fixup(struct page *head)
402 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
405 static inline void mem_cgroup_replace_page_cache(struct page *oldpage,
406 struct page *newpage)
409 #endif /* CONFIG_CGROUP_MEM_RES_CTLR */
411 #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM)
413 mem_cgroup_bad_page_check(struct page *page)
419 mem_cgroup_print_bad_page(struct page *page)
431 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM
432 void sock_update_memcg(struct sock *sk);
433 void sock_release_memcg(struct sock *sk);
435 static inline void sock_update_memcg(struct sock *sk)
438 static inline void sock_release_memcg(struct sock *sk)
441 #endif /* CONFIG_CGROUP_MEM_RES_CTLR_KMEM */
442 #endif /* _LINUX_MEMCONTROL_H */