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 struct memcg_scanrecord {
43 struct mem_cgroup *mem; /* scanend memory cgroup */
44 struct mem_cgroup *root; /* scan target hierarchy root */
45 int context; /* scanning context (see memcontrol.c) */
46 unsigned long nr_scanned[2]; /* the number of scanned pages */
47 unsigned long nr_rotated[2]; /* the number of rotated pages */
48 unsigned long nr_freed[2]; /* the number of freed pages */
49 unsigned long elapsed; /* nsec of time elapsed while scanning */
52 #ifdef CONFIG_CGROUP_MEM_RES_CTLR
54 * All "charge" functions with gfp_mask should use GFP_KERNEL or
55 * (gfp_mask & GFP_RECLAIM_MASK). In current implementatin, memcg doesn't
56 * alloc memory but reclaims memory from all available zones. So, "where I want
57 * memory from" bits of gfp_mask has no meaning. So any bits of that field is
58 * available but adding a rule is better. charge functions' gfp_mask should
59 * be set to GFP_KERNEL or gfp_mask & GFP_RECLAIM_MASK for avoiding ambiguous
61 * (Of course, if memcg does memory allocation in future, GFP_KERNEL is sane.)
64 extern int mem_cgroup_newpage_charge(struct page *page, struct mm_struct *mm,
66 /* for swap handling */
67 extern int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
68 struct page *page, gfp_t mask, struct mem_cgroup **ptr);
69 extern void mem_cgroup_commit_charge_swapin(struct page *page,
70 struct mem_cgroup *ptr);
71 extern void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr);
73 extern int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm,
75 extern void mem_cgroup_add_lru_list(struct page *page, enum lru_list lru);
76 extern void mem_cgroup_del_lru_list(struct page *page, enum lru_list lru);
77 extern void mem_cgroup_rotate_reclaimable_page(struct page *page);
78 extern void mem_cgroup_rotate_lru_list(struct page *page, enum lru_list lru);
79 extern void mem_cgroup_del_lru(struct page *page);
80 extern void mem_cgroup_move_lists(struct page *page,
81 enum lru_list from, enum lru_list to);
83 /* For coalescing uncharge for reducing memcg' overhead*/
84 extern void mem_cgroup_uncharge_start(void);
85 extern void mem_cgroup_uncharge_end(void);
87 extern void mem_cgroup_uncharge_page(struct page *page);
88 extern void mem_cgroup_uncharge_cache_page(struct page *page);
89 extern int mem_cgroup_shmem_charge_fallback(struct page *page,
90 struct mm_struct *mm, gfp_t gfp_mask);
92 extern void mem_cgroup_out_of_memory(struct mem_cgroup *mem, gfp_t gfp_mask);
93 int task_in_mem_cgroup(struct task_struct *task, const struct mem_cgroup *mem);
95 extern struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page);
96 extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
97 extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm);
100 int mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *cgroup)
102 struct mem_cgroup *mem;
104 mem = mem_cgroup_from_task(rcu_dereference((mm)->owner));
106 return cgroup == mem;
109 extern struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem);
112 mem_cgroup_prepare_migration(struct page *page,
113 struct page *newpage, struct mem_cgroup **ptr, gfp_t gfp_mask);
114 extern void mem_cgroup_end_migration(struct mem_cgroup *mem,
115 struct page *oldpage, struct page *newpage, bool migration_ok);
118 * For memory reclaim.
120 int mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg);
121 int mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg);
122 int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
123 unsigned long mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg,
124 int nid, int zid, unsigned int lrumask);
125 struct zone_reclaim_stat *mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg,
127 struct zone_reclaim_stat*
128 mem_cgroup_get_reclaim_stat_from_page(struct page *page);
129 extern void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
130 struct task_struct *p);
132 extern unsigned long try_to_free_mem_cgroup_pages(struct mem_cgroup *mem,
133 gfp_t gfp_mask, bool noswap,
134 struct memcg_scanrecord *rec);
135 extern unsigned long mem_cgroup_shrink_node_zone(struct mem_cgroup *mem,
136 gfp_t gfp_mask, bool noswap,
138 struct memcg_scanrecord *rec,
139 unsigned long *nr_scanned);
141 #ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
142 extern int do_swap_account;
145 static inline bool mem_cgroup_disabled(void)
147 if (mem_cgroup_subsys.disabled)
152 void mem_cgroup_update_page_stat(struct page *page,
153 enum mem_cgroup_page_stat_item idx,
156 static inline void mem_cgroup_inc_page_stat(struct page *page,
157 enum mem_cgroup_page_stat_item idx)
159 mem_cgroup_update_page_stat(page, idx, 1);
162 static inline void mem_cgroup_dec_page_stat(struct page *page,
163 enum mem_cgroup_page_stat_item idx)
165 mem_cgroup_update_page_stat(page, idx, -1);
168 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
170 unsigned long *total_scanned);
171 u64 mem_cgroup_get_limit(struct mem_cgroup *mem);
173 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx);
174 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
175 void mem_cgroup_split_huge_fixup(struct page *head, struct page *tail);
178 #ifdef CONFIG_DEBUG_VM
179 bool mem_cgroup_bad_page_check(struct page *page);
180 void mem_cgroup_print_bad_page(struct page *page);
182 #else /* CONFIG_CGROUP_MEM_RES_CTLR */
185 static inline int mem_cgroup_newpage_charge(struct page *page,
186 struct mm_struct *mm, gfp_t gfp_mask)
191 static inline int mem_cgroup_cache_charge(struct page *page,
192 struct mm_struct *mm, gfp_t gfp_mask)
197 static inline int mem_cgroup_try_charge_swapin(struct mm_struct *mm,
198 struct page *page, gfp_t gfp_mask, struct mem_cgroup **ptr)
203 static inline void mem_cgroup_commit_charge_swapin(struct page *page,
204 struct mem_cgroup *ptr)
208 static inline void mem_cgroup_cancel_charge_swapin(struct mem_cgroup *ptr)
212 static inline void mem_cgroup_uncharge_start(void)
216 static inline void mem_cgroup_uncharge_end(void)
220 static inline void mem_cgroup_uncharge_page(struct page *page)
224 static inline void mem_cgroup_uncharge_cache_page(struct page *page)
228 static inline int mem_cgroup_shmem_charge_fallback(struct page *page,
229 struct mm_struct *mm, gfp_t gfp_mask)
234 static inline void mem_cgroup_add_lru_list(struct page *page, int lru)
238 static inline void mem_cgroup_del_lru_list(struct page *page, int lru)
243 static inline void mem_cgroup_rotate_reclaimable_page(struct page *page)
248 static inline void mem_cgroup_rotate_lru_list(struct page *page, int lru)
253 static inline void mem_cgroup_del_lru(struct page *page)
259 mem_cgroup_move_lists(struct page *page, enum lru_list from, enum lru_list to)
263 static inline struct mem_cgroup *try_get_mem_cgroup_from_page(struct page *page)
268 static inline struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm)
273 static inline int mm_match_cgroup(struct mm_struct *mm, struct mem_cgroup *mem)
278 static inline int task_in_mem_cgroup(struct task_struct *task,
279 const struct mem_cgroup *mem)
284 static inline struct cgroup_subsys_state *mem_cgroup_css(struct mem_cgroup *mem)
290 mem_cgroup_prepare_migration(struct page *page, struct page *newpage,
291 struct mem_cgroup **ptr, gfp_t gfp_mask)
296 static inline void mem_cgroup_end_migration(struct mem_cgroup *mem,
297 struct page *oldpage, struct page *newpage, bool migration_ok)
301 static inline int mem_cgroup_get_reclaim_priority(struct mem_cgroup *mem)
306 static inline void mem_cgroup_note_reclaim_priority(struct mem_cgroup *mem,
311 static inline void mem_cgroup_record_reclaim_priority(struct mem_cgroup *mem,
316 static inline bool mem_cgroup_disabled(void)
322 mem_cgroup_inactive_anon_is_low(struct mem_cgroup *memcg)
328 mem_cgroup_inactive_file_is_low(struct mem_cgroup *memcg)
333 static inline unsigned long
334 mem_cgroup_zone_nr_lru_pages(struct mem_cgroup *memcg, int nid, int zid,
335 unsigned int lru_mask)
341 static inline struct zone_reclaim_stat*
342 mem_cgroup_get_reclaim_stat(struct mem_cgroup *memcg, struct zone *zone)
347 static inline struct zone_reclaim_stat*
348 mem_cgroup_get_reclaim_stat_from_page(struct page *page)
354 mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
358 static inline void mem_cgroup_inc_page_stat(struct page *page,
359 enum mem_cgroup_page_stat_item idx)
363 static inline void mem_cgroup_dec_page_stat(struct page *page,
364 enum mem_cgroup_page_stat_item idx)
369 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
371 unsigned long *total_scanned)
377 u64 mem_cgroup_get_limit(struct mem_cgroup *mem)
382 static inline void mem_cgroup_split_huge_fixup(struct page *head,
388 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
391 #endif /* CONFIG_CGROUP_MEM_CONT */
393 #if !defined(CONFIG_CGROUP_MEM_RES_CTLR) || !defined(CONFIG_DEBUG_VM)
395 mem_cgroup_bad_page_check(struct page *page)
401 mem_cgroup_print_bad_page(struct page *page)
406 #endif /* _LINUX_MEMCONTROL_H */