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);
79 extern int mem_cgroup_shmem_charge_fallback(struct page *page,
80 struct mm_struct *mm, gfp_t gfp_mask);
82 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
83 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
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);
89 int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
91 struct mem_cgroup *mem;
93 mem = mem_cgroup_from_task(rcu_dereference((mm)->owner));
98 extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem);
101 mem_cgroup_prepare_migration(struct page *page,
102 struct page *newpage, struct mem_cgroup **ptr, gfp_t gfp_mask);
103 extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
104 struct page *oldpage, struct page *newpage, bool migration_ok);
107 * For memory reclaim.
109 int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg);
110 int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg);
111 int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
112 unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg,
115 struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg,
117 struct zone_reclaim_stat*
118 mem_cgroup_get_reclaim_stat_from_page(struct page *page);
119 extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
120 struct task_struct *p);
122 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
123 extern int do_swap_account;
126 static inline bool mem_cgroup_disabled(void)
128 if (mem_cgroup_subsys.disabled)
133 void mem_cgroup_update_page_stat(struct page *page,
134 enum mem_cgroup_page_stat_item idx,
137 static inline void mem_cgroup_inc_page_stat(struct page *page,
138 enum mem_cgroup_page_stat_item idx)
140 mem_cgroup_update_page_stat(page, idx, 1);
143 static inline void mem_cgroup_dec_page_stat(struct page *page,
144 enum mem_cgroup_page_stat_item idx)
146 mem_cgroup_update_page_stat(page, idx, -1);
149 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
151 unsigned long *total_scanned);
152 u64 mem_cgroup_get_limit(struct mem_cgroup *mem);
154 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx);
155 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
156 void mem_cgroup_split_huge_fixup(struct page *head, struct page *tail);
159 #ifdef CONFIG_DEBUG_VM
160 bool mem_cgroup_bad_page_check(struct page *page);
161 void mem_cgroup_print_bad_page(struct page *page);
163 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
166 static inline int mem_cgroup_newpage_charge(struct page *page,
167 struct mm_struct *mm, gfp_t gfp_mask)
172 static inline int mem_cgroup_cache_charge(struct page *page,
173 struct mm_struct *mm, gfp_t gfp_mask)
178 static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
179 struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr)
184 static inline void mem_cgroup_commit_charge_swapin(struct page *page,
185 struct mem_cgroup *ptr)
189 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr)
193 static inline void mem_cgroup_uncharge_start(void)
197 static inline void mem_cgroup_uncharge_end(void)
201 static inline void mem_cgroup_uncharge_page(struct page *page)
205 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
209 static inline int mem_cgroup_shmem_charge_fallback(struct page *page,
210 struct mm_struct *mm, gfp_t gfp_mask)
215 static inline void mem_cgroup_add_lru_list(struct page *page, int lru)
219 static inline void mem_cgroup_del_lru_list(struct page *page, int lru)
224 static inline void mem_cgroup_rotate_reclaimable_page(struct page *page)
229 static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru)
234 static inline void mem_cgroup_del_lru(struct page *page)
240 mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to)
244 static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
249 static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
254 static inline int task_in_mem_cgroup(struct task_struct *task,
255 const struct mem_cgroup *mem)
260 static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem)
266 mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
267 struct mem_cgroup **ptr, gfp_t gfp_mask)
272 static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
273 struct page *oldpage, struct page *newpage, bool migration_ok)
277 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
282 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
287 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
292 static inline bool mem_cgroup_disabled(void)
298 mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg)
304 mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg)
309 static inline unsigned long
310 mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, struct zone *zone,
317 static inline struct zone_reclaim_stat*
318 mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone)
323 static inline struct zone_reclaim_stat*
324 mem_cgroup_get_reclaim_stat_from_page(struct page *page)
330 mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
334 static inline void mem_cgroup_inc_page_stat(struct page *page,
335 enum mem_cgroup_page_stat_item idx)
339 static inline void mem_cgroup_dec_page_stat(struct page *page,
340 enum mem_cgroup_page_stat_item idx)
345 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
347 unsigned long *total_scanned)
353 u64 mem_cgroup_get_limit(struct mem_cgroup *mem)
358 static inline void mem_cgroup_split_huge_fixup(struct page *head,
364 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
367 #endif /* CONFIG_CGROUP_MEM_CONT */
369 #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM)
371 mem_cgroup_bad_page_check(struct page *page)
377 mem_cgroup_print_bad_page(struct page *page)
382 #endif /* _LINUX_MEMCONTROL_H */