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>
38 * The corresponding mem_cgroup_stat_names is defined in mm/memcontrol.c,
39 * These two lists should keep in accord with each other.
41 enum mem_cgroup_stat_index {
43 * For MEM_CONTAINER_TYPE_ALL, usage = pagecache + rss.
45 MEM_CGROUP_STAT_CACHE, /* # of pages charged as cache */
46 MEM_CGROUP_STAT_RSS, /* # of pages charged as anon rss */
47 MEM_CGROUP_STAT_RSS_HUGE, /* # of pages charged as anon huge */
48 MEM_CGROUP_STAT_FILE_MAPPED, /* # of pages charged as file rss */
49 MEM_CGROUP_STAT_DIRTY, /* # of dirty pages in page cache */
50 MEM_CGROUP_STAT_WRITEBACK, /* # of pages under writeback */
51 MEM_CGROUP_STAT_SWAP, /* # of pages, swapped out */
52 MEM_CGROUP_STAT_NSTATS,
55 struct mem_cgroup_reclaim_cookie {
58 unsigned int generation;
61 enum mem_cgroup_events_index {
62 MEM_CGROUP_EVENTS_PGPGIN, /* # of pages paged in */
63 MEM_CGROUP_EVENTS_PGPGOUT, /* # of pages paged out */
64 MEM_CGROUP_EVENTS_PGFAULT, /* # of page-faults */
65 MEM_CGROUP_EVENTS_PGMAJFAULT, /* # of major page-faults */
66 MEM_CGROUP_EVENTS_NSTATS,
67 /* default hierarchy events */
68 MEMCG_LOW = MEM_CGROUP_EVENTS_NSTATS,
76 * Per memcg event counter is incremented at every pagein/pageout. With THP,
77 * it will be incremated by the number of pages. This counter is used for
78 * for trigger some periodic events. This is straightforward and better
79 * than using jiffies etc. to handle periodic memcg event.
81 enum mem_cgroup_events_target {
82 MEM_CGROUP_TARGET_THRESH,
83 MEM_CGROUP_TARGET_SOFTLIMIT,
84 MEM_CGROUP_TARGET_NUMAINFO,
89 * Bits in struct cg_proto.flags
92 /* Currently active and new sockets should be assigned to cgroups */
94 /* It was ever activated; we must disarm static keys on destruction */
99 struct page_counter memory_allocated; /* Current allocated memory. */
100 struct percpu_counter sockets_allocated; /* Current number of sockets. */
105 * memcg field is used to find which memcg we belong directly
106 * Each memcg struct can hold more than one cg_proto, so container_of
109 * The elegant solution would be having an inverse function to
110 * proto_cgroup in struct proto, but that means polluting the structure
111 * for everybody, instead of just for memcg users.
113 struct mem_cgroup *memcg;
117 struct mem_cgroup_stat_cpu {
118 long count[MEM_CGROUP_STAT_NSTATS];
119 unsigned long events[MEMCG_NR_EVENTS];
120 unsigned long nr_page_events;
121 unsigned long targets[MEM_CGROUP_NTARGETS];
124 struct mem_cgroup_reclaim_iter {
125 struct mem_cgroup *position;
126 /* scan generation, increased every round-trip */
127 unsigned int generation;
131 * per-zone information in memory controller.
133 struct mem_cgroup_per_zone {
134 struct lruvec lruvec;
135 unsigned long lru_size[NR_LRU_LISTS];
137 struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1];
139 struct rb_node tree_node; /* RB tree node */
140 unsigned long usage_in_excess;/* Set to the value by which */
141 /* the soft limit is exceeded*/
143 struct mem_cgroup *memcg; /* Back pointer, we cannot */
144 /* use container_of */
147 struct mem_cgroup_per_node {
148 struct mem_cgroup_per_zone zoneinfo[MAX_NR_ZONES];
151 struct mem_cgroup_threshold {
152 struct eventfd_ctx *eventfd;
153 unsigned long threshold;
157 struct mem_cgroup_threshold_ary {
158 /* An array index points to threshold just below or equal to usage. */
159 int current_threshold;
160 /* Size of entries[] */
162 /* Array of thresholds */
163 struct mem_cgroup_threshold entries[0];
166 struct mem_cgroup_thresholds {
167 /* Primary thresholds array */
168 struct mem_cgroup_threshold_ary *primary;
170 * Spare threshold array.
171 * This is needed to make mem_cgroup_unregister_event() "never fail".
172 * It must be able to store at least primary->size - 1 entries.
174 struct mem_cgroup_threshold_ary *spare;
178 * The memory controller data structure. The memory controller controls both
179 * page cache and RSS per cgroup. We would eventually like to provide
180 * statistics based on the statistics developed by Rik Van Riel for clock-pro,
181 * to help the administrator determine what knobs to tune.
184 struct cgroup_subsys_state css;
186 /* Accounted resources */
187 struct page_counter memory;
188 struct page_counter memsw;
189 struct page_counter kmem;
191 /* Normal memory consumption range */
195 unsigned long soft_limit;
197 /* vmpressure notifications */
198 struct vmpressure vmpressure;
200 /* css_online() has been completed */
204 * Should the accounting and control be hierarchical, per subtree?
208 /* protected by memcg_oom_lock */
213 /* OOM-Killer disable */
214 int oom_kill_disable;
216 /* protect arrays of thresholds */
217 struct mutex thresholds_lock;
219 /* thresholds for memory usage. RCU-protected */
220 struct mem_cgroup_thresholds thresholds;
222 /* thresholds for mem+swap usage. RCU-protected */
223 struct mem_cgroup_thresholds memsw_thresholds;
225 /* For oom notifier event fd */
226 struct list_head oom_notify;
229 * Should we move charges of a task when a task is moved into this
230 * mem_cgroup ? And what type of charges should we move ?
232 unsigned long move_charge_at_immigrate;
234 * set > 0 if pages under this cgroup are moving to other cgroup.
236 atomic_t moving_account;
237 /* taken only while moving_account > 0 */
238 spinlock_t move_lock;
239 struct task_struct *move_lock_task;
240 unsigned long move_lock_flags;
244 struct mem_cgroup_stat_cpu __percpu *stat;
246 #if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_INET)
247 struct cg_proto tcp_mem;
249 #if defined(CONFIG_MEMCG_KMEM)
250 /* Index in the kmem_cache->memcg_params.memcg_caches array */
252 bool kmem_acct_activated;
253 bool kmem_acct_active;
256 int last_scanned_node;
258 nodemask_t scan_nodes;
259 atomic_t numainfo_events;
260 atomic_t numainfo_updating;
263 #ifdef CONFIG_CGROUP_WRITEBACK
264 struct list_head cgwb_list;
265 struct wb_domain cgwb_domain;
268 /* List of events which userspace want to receive */
269 struct list_head event_list;
270 spinlock_t event_list_lock;
272 struct mem_cgroup_per_node *nodeinfo[0];
273 /* WARNING: nodeinfo must be the last member here */
275 extern struct cgroup_subsys_state *mem_cgroup_root_css;
278 * mem_cgroup_events - count memory events against a cgroup
279 * @memcg: the memory cgroup
280 * @idx: the event index
281 * @nr: the number of events to account for
283 static inline void mem_cgroup_events(struct mem_cgroup *memcg,
284 enum mem_cgroup_events_index idx,
287 this_cpu_add(memcg->stat->events[idx], nr);
290 bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg);
292 int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
293 gfp_t gfp_mask, struct mem_cgroup **memcgp);
294 void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg,
296 void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg);
297 void mem_cgroup_uncharge(struct page *page);
298 void mem_cgroup_uncharge_list(struct list_head *page_list);
300 void mem_cgroup_migrate(struct page *oldpage, struct page *newpage,
303 struct lruvec *mem_cgroup_zone_lruvec(struct zone *, struct mem_cgroup *);
304 struct lruvec *mem_cgroup_page_lruvec(struct page *, struct zone *);
306 bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg);
307 struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
308 struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg);
311 struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){
312 return css ? container_of(css, struct mem_cgroup, css) : NULL;
315 struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *,
317 struct mem_cgroup_reclaim_cookie *);
318 void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *);
320 static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg,
321 struct mem_cgroup *root)
325 if (!root->use_hierarchy)
327 return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup);
330 static inline bool mm_match_cgroup(struct mm_struct *mm,
331 struct mem_cgroup *memcg)
333 struct mem_cgroup *task_memcg;
337 task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
339 match = mem_cgroup_is_descendant(task_memcg, memcg);
344 struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page);
345 ino_t page_cgroup_ino(struct page *page);
347 static inline bool mem_cgroup_disabled(void)
349 if (memory_cgrp_subsys.disabled)
355 * For memory reclaim.
357 int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
359 void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru,
362 static inline bool mem_cgroup_lruvec_online(struct lruvec *lruvec)
364 struct mem_cgroup_per_zone *mz;
365 struct mem_cgroup *memcg;
367 if (mem_cgroup_disabled())
370 mz = container_of(lruvec, struct mem_cgroup_per_zone, lruvec);
373 return !!(memcg->css.flags & CSS_ONLINE);
377 unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru)
379 struct mem_cgroup_per_zone *mz;
381 mz = container_of(lruvec, struct mem_cgroup_per_zone, lruvec);
382 return mz->lru_size[lru];
385 static inline int mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
387 unsigned long inactive_ratio;
388 unsigned long inactive;
389 unsigned long active;
392 inactive = mem_cgroup_get_lru_size(lruvec, LRU_INACTIVE_ANON);
393 active = mem_cgroup_get_lru_size(lruvec, LRU_ACTIVE_ANON);
395 gb = (inactive + active) >> (30 - PAGE_SHIFT);
397 inactive_ratio = int_sqrt(10 * gb);
401 return inactive * inactive_ratio < active;
404 void mem_cgroup_handle_over_high(void);
406 void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
407 struct task_struct *p);
409 static inline void mem_cgroup_oom_enable(void)
411 WARN_ON(current->memcg_may_oom);
412 current->memcg_may_oom = 1;
415 static inline void mem_cgroup_oom_disable(void)
417 WARN_ON(!current->memcg_may_oom);
418 current->memcg_may_oom = 0;
421 static inline bool task_in_memcg_oom(struct task_struct *p)
423 return p->memcg_in_oom;
426 bool mem_cgroup_oom_synchronize(bool wait);
428 #ifdef CONFIG_MEMCG_SWAP
429 extern int do_swap_account;
432 struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page);
433 void mem_cgroup_end_page_stat(struct mem_cgroup *memcg);
436 * mem_cgroup_update_page_stat - update page state statistics
437 * @memcg: memcg to account against
438 * @idx: page state item to account
439 * @val: number of pages (positive or negative)
441 * See mem_cgroup_begin_page_stat() for locking requirements.
443 static inline void mem_cgroup_update_page_stat(struct mem_cgroup *memcg,
444 enum mem_cgroup_stat_index idx, int val)
446 VM_BUG_ON(!rcu_read_lock_held());
449 this_cpu_add(memcg->stat->count[idx], val);
452 static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg,
453 enum mem_cgroup_stat_index idx)
455 mem_cgroup_update_page_stat(memcg, idx, 1);
458 static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg,
459 enum mem_cgroup_stat_index idx)
461 mem_cgroup_update_page_stat(memcg, idx, -1);
464 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
466 unsigned long *total_scanned);
468 static inline void mem_cgroup_count_vm_event(struct mm_struct *mm,
469 enum vm_event_item idx)
471 struct mem_cgroup *memcg;
473 if (mem_cgroup_disabled())
477 memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
478 if (unlikely(!memcg))
483 this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGFAULT]);
486 this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGMAJFAULT]);
494 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
495 void mem_cgroup_split_huge_fixup(struct page *head);
498 #else /* CONFIG_MEMCG */
501 static inline void mem_cgroup_events(struct mem_cgroup *memcg,
502 enum mem_cgroup_events_index idx,
507 static inline bool mem_cgroup_low(struct mem_cgroup *root,
508 struct mem_cgroup *memcg)
513 static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
515 struct mem_cgroup **memcgp)
521 static inline void mem_cgroup_commit_charge(struct page *page,
522 struct mem_cgroup *memcg,
527 static inline void mem_cgroup_cancel_charge(struct page *page,
528 struct mem_cgroup *memcg)
532 static inline void mem_cgroup_uncharge(struct page *page)
536 static inline void mem_cgroup_uncharge_list(struct list_head *page_list)
540 static inline void mem_cgroup_migrate(struct page *oldpage,
541 struct page *newpage,
546 static inline struct lruvec *mem_cgroup_zone_lruvec(struct zone *zone,
547 struct mem_cgroup *memcg)
549 return &zone->lruvec;
552 static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page,
555 return &zone->lruvec;
558 static inline bool mm_match_cgroup(struct mm_struct *mm,
559 struct mem_cgroup *memcg)
564 static inline bool task_in_mem_cgroup(struct task_struct *task,
565 const struct mem_cgroup *memcg)
570 static inline struct mem_cgroup *
571 mem_cgroup_iter(struct mem_cgroup *root,
572 struct mem_cgroup *prev,
573 struct mem_cgroup_reclaim_cookie *reclaim)
578 static inline void mem_cgroup_iter_break(struct mem_cgroup *root,
579 struct mem_cgroup *prev)
583 static inline bool mem_cgroup_disabled(void)
589 mem_cgroup_inactive_anon_is_low(struct lruvec *lruvec)
594 static inline bool mem_cgroup_lruvec_online(struct lruvec *lruvec)
599 static inline unsigned long
600 mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru)
606 mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru,
612 mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
616 static inline struct mem_cgroup *mem_cgroup_begin_page_stat(struct page *page)
621 static inline void mem_cgroup_end_page_stat(struct mem_cgroup *memcg)
625 static inline void mem_cgroup_handle_over_high(void)
629 static inline void mem_cgroup_oom_enable(void)
633 static inline void mem_cgroup_oom_disable(void)
637 static inline bool task_in_memcg_oom(struct task_struct *p)
642 static inline bool mem_cgroup_oom_synchronize(bool wait)
647 static inline void mem_cgroup_inc_page_stat(struct mem_cgroup *memcg,
648 enum mem_cgroup_stat_index idx)
652 static inline void mem_cgroup_dec_page_stat(struct mem_cgroup *memcg,
653 enum mem_cgroup_stat_index idx)
658 unsigned long mem_cgroup_soft_limit_reclaim(struct zone *zone, int order,
660 unsigned long *total_scanned)
665 static inline void mem_cgroup_split_huge_fixup(struct page *head)
670 void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
673 #endif /* CONFIG_MEMCG */
681 #ifdef CONFIG_CGROUP_WRITEBACK
683 struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg);
684 struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb);
685 void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages,
686 unsigned long *pheadroom, unsigned long *pdirty,
687 unsigned long *pwriteback);
689 #else /* CONFIG_CGROUP_WRITEBACK */
691 static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb)
696 static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb,
697 unsigned long *pfilepages,
698 unsigned long *pheadroom,
699 unsigned long *pdirty,
700 unsigned long *pwriteback)
704 #endif /* CONFIG_CGROUP_WRITEBACK */
707 #if defined(CONFIG_INET) && defined(CONFIG_MEMCG_KMEM)
708 void sock_update_memcg(struct sock *sk);
709 void sock_release_memcg(struct sock *sk);
711 static inline void sock_update_memcg(struct sock *sk)
714 static inline void sock_release_memcg(struct sock *sk)
717 #endif /* CONFIG_INET && CONFIG_MEMCG_KMEM */
719 #ifdef CONFIG_MEMCG_KMEM
720 extern struct static_key memcg_kmem_enabled_key;
722 extern int memcg_nr_cache_ids;
723 void memcg_get_cache_ids(void);
724 void memcg_put_cache_ids(void);
727 * Helper macro to loop through all memcg-specific caches. Callers must still
728 * check if the cache is valid (it is either valid or NULL).
729 * the slab_mutex must be held when looping through those caches
731 #define for_each_memcg_cache_index(_idx) \
732 for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++)
734 static inline bool memcg_kmem_enabled(void)
736 return static_key_false(&memcg_kmem_enabled_key);
739 static inline bool memcg_kmem_is_active(struct mem_cgroup *memcg)
741 return memcg->kmem_acct_active;
745 * In general, we'll do everything in our power to not incur in any overhead
746 * for non-memcg users for the kmem functions. Not even a function call, if we
749 * Therefore, we'll inline all those functions so that in the best case, we'll
750 * see that kmemcg is off for everybody and proceed quickly. If it is on,
751 * we'll still do most of the flag checking inline. We check a lot of
752 * conditions, but because they are pretty simple, they are expected to be
755 bool __memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg,
757 void __memcg_kmem_commit_charge(struct page *page,
758 struct mem_cgroup *memcg, int order);
759 void __memcg_kmem_uncharge_pages(struct page *page, int order);
762 * helper for acessing a memcg's index. It will be used as an index in the
763 * child cache array in kmem_cache, and also to derive its name. This function
764 * will return -1 when this is not a kmem-limited memcg.
766 static inline int memcg_cache_id(struct mem_cgroup *memcg)
768 return memcg ? memcg->kmemcg_id : -1;
771 struct kmem_cache *__memcg_kmem_get_cache(struct kmem_cache *cachep);
772 void __memcg_kmem_put_cache(struct kmem_cache *cachep);
774 struct mem_cgroup *__mem_cgroup_from_kmem(void *ptr);
776 int memcg_charge_kmem(struct mem_cgroup *memcg, gfp_t gfp,
777 unsigned long nr_pages);
778 void memcg_uncharge_kmem(struct mem_cgroup *memcg, unsigned long nr_pages);
780 static inline bool __memcg_kmem_bypass(gfp_t gfp)
782 if (!memcg_kmem_enabled())
784 if (gfp & __GFP_NOACCOUNT)
786 if (in_interrupt() || (!current->mm) || (current->flags & PF_KTHREAD))
792 * memcg_kmem_newpage_charge: verify if a new kmem allocation is allowed.
793 * @gfp: the gfp allocation flags.
794 * @memcg: a pointer to the memcg this was charged against.
795 * @order: allocation order.
797 * returns true if the memcg where the current task belongs can hold this
800 * We return true automatically if this allocation is not to be accounted to
804 memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order)
806 if (__memcg_kmem_bypass(gfp))
808 return __memcg_kmem_newpage_charge(gfp, memcg, order);
812 * memcg_kmem_uncharge_pages: uncharge pages from memcg
813 * @page: pointer to struct page being freed
814 * @order: allocation order.
817 memcg_kmem_uncharge_pages(struct page *page, int order)
819 if (memcg_kmem_enabled())
820 __memcg_kmem_uncharge_pages(page, order);
824 * memcg_kmem_commit_charge: embeds correct memcg in a page
825 * @page: pointer to struct page recently allocated
826 * @memcg: the memcg structure we charged against
827 * @order: allocation order.
829 * Needs to be called after memcg_kmem_newpage_charge, regardless of success or
830 * failure of the allocation. if @page is NULL, this function will revert the
831 * charges. Otherwise, it will commit @page to @memcg.
834 memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order)
836 if (memcg_kmem_enabled() && memcg)
837 __memcg_kmem_commit_charge(page, memcg, order);
841 * memcg_kmem_get_cache: selects the correct per-memcg cache for allocation
842 * @cachep: the original global kmem cache
843 * @gfp: allocation flags.
845 * All memory allocated from a per-memcg cache is charged to the owner memcg.
847 static __always_inline struct kmem_cache *
848 memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp)
850 if (__memcg_kmem_bypass(gfp))
852 return __memcg_kmem_get_cache(cachep);
855 static __always_inline void memcg_kmem_put_cache(struct kmem_cache *cachep)
857 if (memcg_kmem_enabled())
858 __memcg_kmem_put_cache(cachep);
861 static __always_inline struct mem_cgroup *mem_cgroup_from_kmem(void *ptr)
863 if (!memcg_kmem_enabled())
865 return __mem_cgroup_from_kmem(ptr);
868 #define for_each_memcg_cache_index(_idx) \
871 static inline bool memcg_kmem_enabled(void)
876 static inline bool memcg_kmem_is_active(struct mem_cgroup *memcg)
882 memcg_kmem_newpage_charge(gfp_t gfp, struct mem_cgroup **memcg, int order)
887 static inline void memcg_kmem_uncharge_pages(struct page *page, int order)
892 memcg_kmem_commit_charge(struct page *page, struct mem_cgroup *memcg, int order)
896 static inline int memcg_cache_id(struct mem_cgroup *memcg)
901 static inline void memcg_get_cache_ids(void)
905 static inline void memcg_put_cache_ids(void)
909 static inline struct kmem_cache *
910 memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp)
915 static inline void memcg_kmem_put_cache(struct kmem_cache *cachep)
919 static inline struct mem_cgroup *mem_cgroup_from_kmem(void *ptr)
923 #endif /* CONFIG_MEMCG_KMEM */
924 #endif /* _LINUX_MEMCONTROL_H */