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>
24 #include <linux/hardirq.h>
25 #include <linux/jump_label.h>
26 #include <linux/page_counter.h>
27 #include <linux/vmpressure.h>
28 #include <linux/eventfd.h>
29 #include <linux/mmzone.h>
30 #include <linux/writeback.h>
31 #include <linux/page-flags.h>
39 * The corresponding mem_cgroup_stat_names is defined in mm/memcontrol.c,
40 * These two lists should keep in accord with each other.
42 enum mem_cgroup_stat_index {
44 * For MEM_CONTAINER_TYPE_ALL, usage = pagecache + rss.
46 MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */
47 MEM_CGROUP_STAT_RSS, /* # of pages charged as anon rss */
48 MEM_CGROUP_STAT_RSS_HUGE, /* # of pages charged as anon huge */
49 MEM_CGROUP_STAT_FILE_MAPPED, /* # of pages charged as file rss */
50 MEM_CGROUP_STAT_DIRTY, /* # of dirty pages in page cache */
51 MEM_CGROUP_STAT_WRITEBACK, /* # of pages under writeback */
52 MEM_CGROUP_STAT_SWAP, /* # of pages, swapped out */
53 MEM_CGROUP_STAT_NSTATS,
54 /* default hierarchy stats */
55 MEMCG_SOCK = MEM_CGROUP_STAT_NSTATS,
59 struct mem_cgroup_reclaim_cookie {
62 unsigned int generation;
65 enum mem_cgroup_events_index {
66 MEM_CGROUP_EVENTS_PGPGIN, /* # of pages paged in */
67 MEM_CGROUP_EVENTS_PGPGOUT, /* # of pages paged out */
68 MEM_CGROUP_EVENTS_PGFAULT, /* # of page-faults */
69 MEM_CGROUP_EVENTS_PGMAJFAULT, /* # of major page-faults */
70 MEM_CGROUP_EVENTS_NSTATS,
71 /* default hierarchy events */
72 MEMCG_LOW = MEM_CGROUP_EVENTS_NSTATS,
80 * Per memcg event counter is incremented at every pagein/pageout. With THP,
81 * it will be incremated by the number of pages. This counter is used for
82 * for trigger some periodic events. This is straightforward and better
83 * than using jiffies etc. to handle periodic memcg event.
85 enum mem_cgroup_events_target {
86 MEM_CGROUP_TARGET_THRESH,
87 MEM_CGROUP_TARGET_SOFTLIMIT,
88 MEM_CGROUP_TARGET_NUMAINFO,
94 #define MEM_CGROUP_ID_SHIFT 16
95 #define MEM_CGROUP_ID_MAX USHRT_MAX
97 struct mem_cgroup_stat_cpu {
98 long count[MEMCG_NR_STAT];
99 unsigned long events[MEMCG_NR_EVENTS];
100 unsigned long nr_page_events;
101 unsigned long targets[MEM_CGROUP_NTARGETS];
104 struct mem_cgroup_reclaim_iter {
105 struct mem_cgroup *position;
106 /* scan generation, increased every round-trip */
107 unsigned int generation;
111 * per-zone information in memory controller.
113 struct mem_cgroup_per_zone {
114 struct lruvec lruvec;
115 unsigned long lru_size[NR_LRU_LISTS];
117 struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1];
119 struct rb_node tree_node; /* RB tree node */
120 unsigned long usage_in_excess;/* Set to the value by which */
121 /* the soft limit is exceeded*/
123 struct mem_cgroup *memcg; /* Back pointer, we cannot */
124 /* use container_of */
127 struct mem_cgroup_per_node {
128 struct mem_cgroup_per_zone zoneinfo[MAX_NR_ZONES];
131 struct mem_cgroup_threshold {
132 struct eventfd_ctx *eventfd;
133 unsigned long threshold;
137 struct mem_cgroup_threshold_ary {
138 /* An array index points to threshold just below or equal to usage. */
139 int current_threshold;
140 /* Size of entries[] */
142 /* Array of thresholds */
143 struct mem_cgroup_threshold entries[0];
146 struct mem_cgroup_thresholds {
147 /* Primary thresholds array */
148 struct mem_cgroup_threshold_ary *primary;
150 * Spare threshold array.
151 * This is needed to make mem_cgroup_unregister_event() "never fail".
152 * It must be able to store at least primary->size - 1 entries.
154 struct mem_cgroup_threshold_ary *spare;
157 enum memcg_kmem_state {
164 * The memory controller data structure. The memory controller controls both
165 * page cache and RSS per cgroup. We would eventually like to provide
166 * statistics based on the statistics developed by Rik Van Riel for clock-pro,
167 * to help the administrator determine what knobs to tune.
170 struct cgroup_subsys_state css;
172 /* Accounted resources */
173 struct page_counter memory;
174 struct page_counter swap;
176 /* Legacy consumer-oriented counters */
177 struct page_counter memsw;
178 struct page_counter kmem;
179 struct page_counter tcpmem;
181 /* Normal memory consumption range */
185 /* Range enforcement for interrupt charges */
186 struct work_struct high_work;
188 unsigned long soft_limit;
190 /* vmpressure notifications */
191 struct vmpressure vmpressure;
194 * Should the accounting and control be hierarchical, per subtree?
198 /* protected by memcg_oom_lock */
203 /* OOM-Killer disable */
204 int oom_kill_disable;
206 /* handle for "memory.events" */
207 struct cgroup_file events_file;
209 /* protect arrays of thresholds */
210 struct mutex thresholds_lock;
212 /* thresholds for memory usage. RCU-protected */
213 struct mem_cgroup_thresholds thresholds;
215 /* thresholds for mem+swap usage. RCU-protected */
216 struct mem_cgroup_thresholds memsw_thresholds;
218 /* For oom notifier event fd */
219 struct list_head oom_notify;
222 * Should we move charges of a task when a task is moved into this
223 * mem_cgroup ? And what type of charges should we move ?
225 unsigned long move_charge_at_immigrate;
227 * set > 0 if pages under this cgroup are moving to other cgroup.
229 atomic_t moving_account;
230 /* taken only while moving_account > 0 */
231 spinlock_t move_lock;
232 struct task_struct *move_lock_task;
233 unsigned long move_lock_flags;
237 struct mem_cgroup_stat_cpu __percpu *stat;
239 unsigned long socket_pressure;
241 /* Legacy tcp memory accounting */
246 /* Index in the kmem_cache->memcg_params.memcg_caches array */
248 enum memcg_kmem_state kmem_state;
251 int last_scanned_node;
253 nodemask_t scan_nodes;
254 atomic_t numainfo_events;
255 atomic_t numainfo_updating;
258 #ifdef CONFIG_CGROUP_WRITEBACK
259 struct list_head cgwb_list;
260 struct wb_domain cgwb_domain;
263 /* List of events which userspace want to receive */
264 struct list_head event_list;
265 spinlock_t event_list_lock;
267 struct mem_cgroup_per_node *nodeinfo[0];
268 /* WARNING: nodeinfo must be the last member here */
271 extern struct mem_cgroup *root_mem_cgroup;
273 static inline bool mem_cgroup_disabled(void)
275 return !cgroup_subsys_enabled(memory_cgrp_subsys);
279 * mem_cgroup_events - count memory events against a cgroup
280 * @memcg: the memory cgroup
281 * @idx: the event index
282 * @nr: the number of events to account for
284 static inline void mem_cgroup_events(struct mem_cgroup *memcg,
285 enum mem_cgroup_events_index idx,
288 this_cpu_add(memcg->stat->events[idx], nr);
289 cgroup_file_notify(&memcg->events_file);
292 bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg);
294 int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
295 gfp_t gfp_mask, struct mem_cgroup **memcgp,
297 void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg,
298 bool lrucare, bool compound);
299 void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg,
301 void mem_cgroup_uncharge(struct page *page);
302 void mem_cgroup_uncharge_list(struct list_head *page_list);
304 void mem_cgroup_migrate(struct page *oldpage, struct page *newpage);
306 struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *);
307 struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *);
309 bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg);
310 struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
313 struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){
314 return css ? container_of(css, struct mem_cgroup, css) : NULL;
317 #define mem_cgroup_from_counter(counter, member) \
318 container_of(counter, struct mem_cgroup, member)
320 struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *,
322 struct mem_cgroup_reclaim_cookie *);
323 void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *);
325 static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg)
327 if (mem_cgroup_disabled())
330 return memcg->css.id;
334 * mem_cgroup_from_id - look up a memcg from an id
335 * @id: the id to look up
337 * Caller must hold rcu_read_lock() and use css_tryget() as necessary.
339 static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id)
341 struct cgroup_subsys_state *css;
343 css = css_from_id(id, &memory_cgrp_subsys);
344 return mem_cgroup_from_css(css);
348 * parent_mem_cgroup - find the accounting parent of a memcg
349 * @memcg: memcg whose parent to find
351 * Returns the parent memcg, or NULL if this is the root or the memory
352 * controller is in legacy no-hierarchy mode.
354 static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg)
356 if (!memcg->memory.parent)
358 return mem_cgroup_from_counter(memcg->memory.parent, memory);
361 static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg,
362 struct mem_cgroup *root)
366 if (!root->use_hierarchy)
368 return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup);
371 static inline bool mm_match_cgroup(struct mm_struct *mm,
372 struct mem_cgroup *memcg)
374 struct mem_cgroup *task_memcg;
378 task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
380 match = mem_cgroup_is_descendant(task_memcg, memcg);
385 struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page);
386 ino_t page_cgroup_ino(struct page *page);
388 static inline bool mem_cgroup_online(struct mem_cgroup *memcg)
390 if (mem_cgroup_disabled())
392 return !!(memcg->css.flags & CSS_ONLINE);
396 * For memory reclaim.
398 int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
400 void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru,
404 unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru)
406 struct mem_cgroup_per_zone *mz;
408 mz = container_of(lruvec, struct mem_cgroup_per_zone, lruvec);
409 return mz->lru_size[lru];
412 static inline bool mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
414 unsigned long inactive_ratio;
415 unsigned long inactive;
416 unsigned long active;
419 inactive = mem_cgroup_get_lru_size(lruvec, LRU_INACTIVE_ANON);
420 active = mem_cgroup_get_lru_size(lruvec, LRU_ACTIVE_ANON);
422 gb = (inactive + active) >> (30 - PAGE_SHIFT);
424 inactive_ratio = int_sqrt(10 * gb);
428 return inactive * inactive_ratio < active;
431 void mem_cgroup_handle_over_high(void);
433 void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
434 struct task_struct *p);
436 static inline void mem_cgroup_oom_enable(void)
438 WARN_ON(current->memcg_may_oom);
439 current->memcg_may_oom = 1;
442 static inline void mem_cgroup_oom_disable(void)
444 WARN_ON(!current->memcg_may_oom);
445 current->memcg_may_oom = 0;
448 static inline bool task_in_memcg_oom(struct task_struct *p)
450 return p->memcg_in_oom;
453 bool mem_cgroup_oom_synchronize(bool wait);
455 #ifdef CONFIG_MEMCG_SWAP
456 extern int do_swap_account;
459 void lock_page_memcg(struct page *page);
460 void unlock_page_memcg(struct page *page);
463 * mem_cgroup_update_page_stat - update page state statistics
465 * @idx: page state item to account
466 * @val: number of pages (positive or negative)
468 * The @page must be locked or the caller must use lock_page_memcg()
469 * to prevent double accounting when the page is concurrently being
470 * moved to another memcg:
472 * lock_page(page) or lock_page_memcg(page)
473 * if (TestClearPageState(page))
474 * mem_cgroup_update_page_stat(page, state, -1);
475 * unlock_page(page) or unlock_page_memcg(page)
477 static inline void mem_cgroup_update_page_stat(struct page *page,
478 enum mem_cgroup_stat_index idx, int val)
480 VM_BUG_ON(!(rcu_read_lock_held() || PageLocked(page)));
482 if (page->mem_cgroup)
483 this_cpu_add(page->mem_cgroup->stat->count[idx], val);
486 static inline void mem_cgroup_inc_page_stat(struct page *page,
487 enum mem_cgroup_stat_index idx)
489 mem_cgroup_update_page_stat(page, idx, 1);
492 static inline void mem_cgroup_dec_page_stat(struct page *page,
493 enum mem_cgroup_stat_index idx)
495 mem_cgroup_update_page_stat(page, idx, -1);
498 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
500 unsigned long *total_scanned);
502 static inline void mem_cgroup_count_vm_event(struct mm_struct *mm,
503 enum vm_event_item idx)
505 struct mem_cgroup *memcg;
507 if (mem_cgroup_disabled())
511 memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
512 if (unlikely(!memcg))
517 this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGFAULT]);
520 this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGMAJFAULT]);
528 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
529 void mem_cgroup_split_huge_fixup(struct page *head);
532 #else /* CONFIG_MEMCG */
534 #define MEM_CGROUP_ID_SHIFT 0
535 #define MEM_CGROUP_ID_MAX 0
539 static inline bool mem_cgroup_disabled(void)
544 static inline void mem_cgroup_events(struct mem_cgroup *memcg,
545 enum mem_cgroup_events_index idx,
550 static inline bool mem_cgroup_low(struct mem_cgroup *root,
551 struct mem_cgroup *memcg)
556 static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
558 struct mem_cgroup **memcgp,
565 static inline void mem_cgroup_commit_charge(struct page *page,
566 struct mem_cgroup *memcg,
567 bool lrucare, bool compound)
571 static inline void mem_cgroup_cancel_charge(struct page *page,
572 struct mem_cgroup *memcg,
577 static inline void mem_cgroup_uncharge(struct page *page)
581 static inline void mem_cgroup_uncharge_list(struct list_head *page_list)
585 static inline void mem_cgroup_migrate(struct page *old, struct page *new)
589 static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone,
590 struct mem_cgroup *memcg)
592 return &zone->lruvec;
595 static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page,
598 return &zone->lruvec;
601 static inline bool mm_match_cgroup(struct mm_struct *mm,
602 struct mem_cgroup *memcg)
607 static inline bool task_in_mem_cgroup(struct task_struct *task,
608 const struct mem_cgroup *memcg)
613 static inline struct mem_cgroup *
614 mem_cgroup_iter(struct mem_cgroup *root,
615 struct mem_cgroup *prev,
616 struct mem_cgroup_reclaim_cookie *reclaim)
621 static inline void mem_cgroup_iter_break(struct mem_cgroup *root,
622 struct mem_cgroup *prev)
626 static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg)
631 static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id)
634 /* XXX: This should always return root_mem_cgroup */
638 static inline bool mem_cgroup_online(struct mem_cgroup *memcg)
644 mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
649 static inline unsigned long
650 mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru)
656 mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru,
662 mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
666 static inline void lock_page_memcg(struct page *page)
670 static inline void unlock_page_memcg(struct page *page)
674 static inline void mem_cgroup_handle_over_high(void)
678 static inline void mem_cgroup_oom_enable(void)
682 static inline void mem_cgroup_oom_disable(void)
686 static inline bool task_in_memcg_oom(struct task_struct *p)
691 static inline bool mem_cgroup_oom_synchronize(bool wait)
696 static inline void mem_cgroup_inc_page_stat(struct page *page,
697 enum mem_cgroup_stat_index idx)
701 static inline void mem_cgroup_dec_page_stat(struct page *page,
702 enum mem_cgroup_stat_index idx)
707 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
709 unsigned long *total_scanned)
714 static inline void mem_cgroup_split_huge_fixup(struct page *head)
719 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
722 #endif /* CONFIG_MEMCG */
724 #ifdef CONFIG_CGROUP_WRITEBACK
726 struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg);
727 struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb);
728 void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages,
729 unsigned long *pheadroom, unsigned long *pdirty,
730 unsigned long *pwriteback);
732 #else /* CONFIG_CGROUP_WRITEBACK */
734 static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb)
739 static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb,
740 unsigned long *pfilepages,
741 unsigned long *pheadroom,
742 unsigned long *pdirty,
743 unsigned long *pwriteback)
747 #endif /* CONFIG_CGROUP_WRITEBACK */
750 void sock_update_memcg(struct sock *sk);
751 void sock_release_memcg(struct sock *sk);
752 bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages);
753 void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages);
755 extern struct static_key_false memcg_sockets_enabled_key;
756 #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key)
757 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
759 if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure)
762 if (time_before(jiffies, memcg->socket_pressure))
764 } while ((memcg = parent_mem_cgroup(memcg)));
768 #define mem_cgroup_sockets_enabled 0
769 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
775 #if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
776 extern struct static_key_false memcg_kmem_enabled_key;
778 extern int memcg_nr_cache_ids;
779 void memcg_get_cache_ids(void);
780 void memcg_put_cache_ids(void);
783 * Helper macro to loop through all memcg-specific caches. Callers must still
784 * check if the cache is valid (it is either valid or NULL).
785 * the slab_mutex must be held when looping through those caches
787 #define for_each_memcg_cache_index(_idx) \
788 for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++)
790 static inline bool memcg_kmem_enabled(void)
792 return static_branch_unlikely(&memcg_kmem_enabled_key);
795 static inline bool memcg_kmem_online(struct mem_cgroup *memcg)
797 return memcg->kmem_state == KMEM_ONLINE;
801 * In general, we'll do everything in our power to not incur in any overhead
802 * for non-memcg users for the kmem functions. Not even a function call, if we
805 * Therefore, we'll inline all those functions so that in the best case, we'll
806 * see that kmemcg is off for everybody and proceed quickly. If it is on,
807 * we'll still do most of the flag checking inline. We check a lot of
808 * conditions, but because they are pretty simple, they are expected to be
811 int __memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order,
812 struct mem_cgroup *memcg);
813 int __memcg_kmem_charge(struct page *page, gfp_t gfp, int order);
814 void __memcg_kmem_uncharge(struct page *page, int order);
817 * helper for accessing a memcg's index. It will be used as an index in the
818 * child cache array in kmem_cache, and also to derive its name. This function
819 * will return -1 when this is not a kmem-limited memcg.
821 static inline int memcg_cache_id(struct mem_cgroup *memcg)
823 return memcg ? memcg->kmemcg_id : -1;
826 struct kmem_cache *__memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp);
827 void __memcg_kmem_put_cache(struct kmem_cache *cachep);
829 static inline bool __memcg_kmem_bypass(void)
831 if (!memcg_kmem_enabled())
833 if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD))
839 * memcg_kmem_charge: charge a kmem page
840 * @page: page to charge
842 * @order: allocation order
844 * Returns 0 on success, an error code on failure.
846 static __always_inline int memcg_kmem_charge(struct page *page,
847 gfp_t gfp, int order)
849 if (__memcg_kmem_bypass())
851 if (!(gfp & __GFP_ACCOUNT))
853 return __memcg_kmem_charge(page, gfp, order);
857 * memcg_kmem_uncharge: uncharge a kmem page
858 * @page: page to uncharge
859 * @order: allocation order
861 static __always_inline void memcg_kmem_uncharge(struct page *page, int order)
863 if (memcg_kmem_enabled())
864 __memcg_kmem_uncharge(page, order);
868 * memcg_kmem_get_cache: selects the correct per-memcg cache for allocation
869 * @cachep: the original global kmem cache
871 * All memory allocated from a per-memcg cache is charged to the owner memcg.
873 static __always_inline struct kmem_cache *
874 memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp)
876 if (__memcg_kmem_bypass())
878 return __memcg_kmem_get_cache(cachep, gfp);
881 static __always_inline void memcg_kmem_put_cache(struct kmem_cache *cachep)
883 if (memcg_kmem_enabled())
884 __memcg_kmem_put_cache(cachep);
887 #define for_each_memcg_cache_index(_idx) \
890 static inline bool memcg_kmem_enabled(void)
895 static inline bool memcg_kmem_online(struct mem_cgroup *memcg)
900 static inline int memcg_kmem_charge(struct page *page, gfp_t gfp, int order)
905 static inline void memcg_kmem_uncharge(struct page *page, int order)
909 static inline int memcg_cache_id(struct mem_cgroup *memcg)
914 static inline void memcg_get_cache_ids(void)
918 static inline void memcg_put_cache_ids(void)
922 static inline struct kmem_cache *
923 memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp)
928 static inline void memcg_kmem_put_cache(struct kmem_cache *cachep)
931 #endif /* CONFIG_MEMCG && !CONFIG_SLOB */
933 #endif /* _LINUX_MEMCONTROL_H */