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
,
53 /* default hierarchy stats */
54 MEMCG_SOCK
= MEM_CGROUP_STAT_NSTATS
,
58 struct mem_cgroup_reclaim_cookie
{
61 unsigned int generation
;
64 enum mem_cgroup_events_index
{
65 MEM_CGROUP_EVENTS_PGPGIN
, /* # of pages paged in */
66 MEM_CGROUP_EVENTS_PGPGOUT
, /* # of pages paged out */
67 MEM_CGROUP_EVENTS_PGFAULT
, /* # of page-faults */
68 MEM_CGROUP_EVENTS_PGMAJFAULT
, /* # of major page-faults */
69 MEM_CGROUP_EVENTS_NSTATS
,
70 /* default hierarchy events */
71 MEMCG_LOW
= MEM_CGROUP_EVENTS_NSTATS
,
79 * Per memcg event counter is incremented at every pagein/pageout. With THP,
80 * it will be incremated by the number of pages. This counter is used for
81 * for trigger some periodic events. This is straightforward and better
82 * than using jiffies etc. to handle periodic memcg event.
84 enum mem_cgroup_events_target
{
85 MEM_CGROUP_TARGET_THRESH
,
86 MEM_CGROUP_TARGET_SOFTLIMIT
,
87 MEM_CGROUP_TARGET_NUMAINFO
,
93 #define MEM_CGROUP_ID_SHIFT 16
94 #define MEM_CGROUP_ID_MAX USHRT_MAX
96 struct mem_cgroup_stat_cpu
{
97 long count
[MEMCG_NR_STAT
];
98 unsigned long events
[MEMCG_NR_EVENTS
];
99 unsigned long nr_page_events
;
100 unsigned long targets
[MEM_CGROUP_NTARGETS
];
103 struct mem_cgroup_reclaim_iter
{
104 struct mem_cgroup
*position
;
105 /* scan generation, increased every round-trip */
106 unsigned int generation
;
110 * per-zone information in memory controller.
112 struct mem_cgroup_per_zone
{
113 struct lruvec lruvec
;
114 unsigned long lru_size
[NR_LRU_LISTS
];
116 struct mem_cgroup_reclaim_iter iter
[DEF_PRIORITY
+ 1];
118 struct rb_node tree_node
; /* RB tree node */
119 unsigned long usage_in_excess
;/* Set to the value by which */
120 /* the soft limit is exceeded*/
122 struct mem_cgroup
*memcg
; /* Back pointer, we cannot */
123 /* use container_of */
126 struct mem_cgroup_per_node
{
127 struct mem_cgroup_per_zone zoneinfo
[MAX_NR_ZONES
];
130 struct mem_cgroup_threshold
{
131 struct eventfd_ctx
*eventfd
;
132 unsigned long threshold
;
136 struct mem_cgroup_threshold_ary
{
137 /* An array index points to threshold just below or equal to usage. */
138 int current_threshold
;
139 /* Size of entries[] */
141 /* Array of thresholds */
142 struct mem_cgroup_threshold entries
[0];
145 struct mem_cgroup_thresholds
{
146 /* Primary thresholds array */
147 struct mem_cgroup_threshold_ary
*primary
;
149 * Spare threshold array.
150 * This is needed to make mem_cgroup_unregister_event() "never fail".
151 * It must be able to store at least primary->size - 1 entries.
153 struct mem_cgroup_threshold_ary
*spare
;
156 enum memcg_kmem_state
{
163 * The memory controller data structure. The memory controller controls both
164 * page cache and RSS per cgroup. We would eventually like to provide
165 * statistics based on the statistics developed by Rik Van Riel for clock-pro,
166 * to help the administrator determine what knobs to tune.
169 struct cgroup_subsys_state css
;
171 /* Accounted resources */
172 struct page_counter memory
;
173 struct page_counter swap
;
175 /* Legacy consumer-oriented counters */
176 struct page_counter memsw
;
177 struct page_counter kmem
;
178 struct page_counter tcpmem
;
180 /* Normal memory consumption range */
184 /* Range enforcement for interrupt charges */
185 struct work_struct high_work
;
187 unsigned long soft_limit
;
189 /* vmpressure notifications */
190 struct vmpressure vmpressure
;
193 * Should the accounting and control be hierarchical, per subtree?
197 /* protected by memcg_oom_lock */
202 /* OOM-Killer disable */
203 int oom_kill_disable
;
205 /* handle for "memory.events" */
206 struct cgroup_file events_file
;
208 /* protect arrays of thresholds */
209 struct mutex thresholds_lock
;
211 /* thresholds for memory usage. RCU-protected */
212 struct mem_cgroup_thresholds thresholds
;
214 /* thresholds for mem+swap usage. RCU-protected */
215 struct mem_cgroup_thresholds memsw_thresholds
;
217 /* For oom notifier event fd */
218 struct list_head oom_notify
;
221 * Should we move charges of a task when a task is moved into this
222 * mem_cgroup ? And what type of charges should we move ?
224 unsigned long move_charge_at_immigrate
;
226 * set > 0 if pages under this cgroup are moving to other cgroup.
228 atomic_t moving_account
;
229 /* taken only while moving_account > 0 */
230 spinlock_t move_lock
;
231 struct task_struct
*move_lock_task
;
232 unsigned long move_lock_flags
;
236 struct mem_cgroup_stat_cpu __percpu
*stat
;
238 unsigned long socket_pressure
;
240 /* Legacy tcp memory accounting */
245 /* Index in the kmem_cache->memcg_params.memcg_caches array */
247 enum memcg_kmem_state kmem_state
;
250 int last_scanned_node
;
252 nodemask_t scan_nodes
;
253 atomic_t numainfo_events
;
254 atomic_t numainfo_updating
;
257 #ifdef CONFIG_CGROUP_WRITEBACK
258 struct list_head cgwb_list
;
259 struct wb_domain cgwb_domain
;
262 /* List of events which userspace want to receive */
263 struct list_head event_list
;
264 spinlock_t event_list_lock
;
266 struct mem_cgroup_per_node
*nodeinfo
[0];
267 /* WARNING: nodeinfo must be the last member here */
270 extern struct mem_cgroup
*root_mem_cgroup
;
272 static inline bool mem_cgroup_disabled(void)
274 return !cgroup_subsys_enabled(memory_cgrp_subsys
);
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
);
288 cgroup_file_notify(&memcg
->events_file
);
291 bool mem_cgroup_low(struct mem_cgroup
*root
, struct mem_cgroup
*memcg
);
293 int mem_cgroup_try_charge(struct page
*page
, struct mm_struct
*mm
,
294 gfp_t gfp_mask
, struct mem_cgroup
**memcgp
,
296 void mem_cgroup_commit_charge(struct page
*page
, struct mem_cgroup
*memcg
,
297 bool lrucare
, bool compound
);
298 void mem_cgroup_cancel_charge(struct page
*page
, struct mem_cgroup
*memcg
,
300 void mem_cgroup_uncharge(struct page
*page
);
301 void mem_cgroup_uncharge_list(struct list_head
*page_list
);
303 void mem_cgroup_migrate(struct page
*oldpage
, struct page
*newpage
);
305 struct lruvec
*mem_cgroup_zone_lruvec(struct zone
*, struct mem_cgroup
*);
306 struct lruvec
*mem_cgroup_page_lruvec(struct page
*, struct zone
*);
308 bool task_in_mem_cgroup(struct task_struct
*task
, struct mem_cgroup
*memcg
);
309 struct mem_cgroup
*mem_cgroup_from_task(struct task_struct
*p
);
312 struct mem_cgroup
*mem_cgroup_from_css(struct cgroup_subsys_state
*css
){
313 return css
? container_of(css
, struct mem_cgroup
, css
) : NULL
;
316 #define mem_cgroup_from_counter(counter, member) \
317 container_of(counter, struct mem_cgroup, member)
319 struct mem_cgroup
*mem_cgroup_iter(struct mem_cgroup
*,
321 struct mem_cgroup_reclaim_cookie
*);
322 void mem_cgroup_iter_break(struct mem_cgroup
*, struct mem_cgroup
*);
324 static inline unsigned short mem_cgroup_id(struct mem_cgroup
*memcg
)
326 if (mem_cgroup_disabled())
329 return memcg
->css
.id
;
333 * mem_cgroup_from_id - look up a memcg from an id
334 * @id: the id to look up
336 * Caller must hold rcu_read_lock() and use css_tryget() as necessary.
338 static inline struct mem_cgroup
*mem_cgroup_from_id(unsigned short id
)
340 struct cgroup_subsys_state
*css
;
342 css
= css_from_id(id
, &memory_cgrp_subsys
);
343 return mem_cgroup_from_css(css
);
347 * parent_mem_cgroup - find the accounting parent of a memcg
348 * @memcg: memcg whose parent to find
350 * Returns the parent memcg, or NULL if this is the root or the memory
351 * controller is in legacy no-hierarchy mode.
353 static inline struct mem_cgroup
*parent_mem_cgroup(struct mem_cgroup
*memcg
)
355 if (!memcg
->memory
.parent
)
357 return mem_cgroup_from_counter(memcg
->memory
.parent
, memory
);
360 static inline bool mem_cgroup_is_descendant(struct mem_cgroup
*memcg
,
361 struct mem_cgroup
*root
)
365 if (!root
->use_hierarchy
)
367 return cgroup_is_descendant(memcg
->css
.cgroup
, root
->css
.cgroup
);
370 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
371 struct mem_cgroup
*memcg
)
373 struct mem_cgroup
*task_memcg
;
377 task_memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
379 match
= mem_cgroup_is_descendant(task_memcg
, memcg
);
384 struct cgroup_subsys_state
*mem_cgroup_css_from_page(struct page
*page
);
385 ino_t
page_cgroup_ino(struct page
*page
);
387 static inline bool mem_cgroup_online(struct mem_cgroup
*memcg
)
389 if (mem_cgroup_disabled())
391 return !!(memcg
->css
.flags
& CSS_ONLINE
);
395 * For memory reclaim.
397 int mem_cgroup_select_victim_node(struct mem_cgroup
*memcg
);
399 void mem_cgroup_update_lru_size(struct lruvec
*lruvec
, enum lru_list lru
,
403 unsigned long mem_cgroup_get_lru_size(struct lruvec
*lruvec
, enum lru_list lru
)
405 struct mem_cgroup_per_zone
*mz
;
407 mz
= container_of(lruvec
, struct mem_cgroup_per_zone
, lruvec
);
408 return mz
->lru_size
[lru
];
411 static inline bool mem_cgroup_inactive_anon_is_low(struct lruvec
*lruvec
)
413 unsigned long inactive_ratio
;
414 unsigned long inactive
;
415 unsigned long active
;
418 inactive
= mem_cgroup_get_lru_size(lruvec
, LRU_INACTIVE_ANON
);
419 active
= mem_cgroup_get_lru_size(lruvec
, LRU_ACTIVE_ANON
);
421 gb
= (inactive
+ active
) >> (30 - PAGE_SHIFT
);
423 inactive_ratio
= int_sqrt(10 * gb
);
427 return inactive
* inactive_ratio
< active
;
430 void mem_cgroup_handle_over_high(void);
432 void mem_cgroup_print_oom_info(struct mem_cgroup
*memcg
,
433 struct task_struct
*p
);
435 static inline void mem_cgroup_oom_enable(void)
437 WARN_ON(current
->memcg_may_oom
);
438 current
->memcg_may_oom
= 1;
441 static inline void mem_cgroup_oom_disable(void)
443 WARN_ON(!current
->memcg_may_oom
);
444 current
->memcg_may_oom
= 0;
447 static inline bool task_in_memcg_oom(struct task_struct
*p
)
449 return p
->memcg_in_oom
;
452 bool mem_cgroup_oom_synchronize(bool wait
);
454 #ifdef CONFIG_MEMCG_SWAP
455 extern int do_swap_account
;
458 void lock_page_memcg(struct page
*page
);
459 void unlock_page_memcg(struct page
*page
);
462 * mem_cgroup_update_page_stat - update page state statistics
464 * @idx: page state item to account
465 * @val: number of pages (positive or negative)
467 * Callers must use lock_page_memcg() to prevent double accounting
468 * when the page is concurrently being moved to another memcg:
470 * lock_page_memcg(page);
471 * if (TestClearPageState(page))
472 * mem_cgroup_update_page_stat(page, state, -1);
473 * unlock_page_memcg(page);
475 static inline void mem_cgroup_update_page_stat(struct page
*page
,
476 enum mem_cgroup_stat_index idx
, int val
)
478 VM_BUG_ON(!rcu_read_lock_held());
480 if (page
->mem_cgroup
)
481 this_cpu_add(page
->mem_cgroup
->stat
->count
[idx
], val
);
484 static inline void mem_cgroup_inc_page_stat(struct page
*page
,
485 enum mem_cgroup_stat_index idx
)
487 mem_cgroup_update_page_stat(page
, idx
, 1);
490 static inline void mem_cgroup_dec_page_stat(struct page
*page
,
491 enum mem_cgroup_stat_index idx
)
493 mem_cgroup_update_page_stat(page
, idx
, -1);
496 unsigned long mem_cgroup_soft_limit_reclaim(struct zone
*zone
, int order
,
498 unsigned long *total_scanned
);
500 static inline void mem_cgroup_count_vm_event(struct mm_struct
*mm
,
501 enum vm_event_item idx
)
503 struct mem_cgroup
*memcg
;
505 if (mem_cgroup_disabled())
509 memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
510 if (unlikely(!memcg
))
515 this_cpu_inc(memcg
->stat
->events
[MEM_CGROUP_EVENTS_PGFAULT
]);
518 this_cpu_inc(memcg
->stat
->events
[MEM_CGROUP_EVENTS_PGMAJFAULT
]);
526 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
527 void mem_cgroup_split_huge_fixup(struct page
*head
);
530 #else /* CONFIG_MEMCG */
532 #define MEM_CGROUP_ID_SHIFT 0
533 #define MEM_CGROUP_ID_MAX 0
537 static inline bool mem_cgroup_disabled(void)
542 static inline void mem_cgroup_events(struct mem_cgroup
*memcg
,
543 enum mem_cgroup_events_index idx
,
548 static inline bool mem_cgroup_low(struct mem_cgroup
*root
,
549 struct mem_cgroup
*memcg
)
554 static inline int mem_cgroup_try_charge(struct page
*page
, struct mm_struct
*mm
,
556 struct mem_cgroup
**memcgp
,
563 static inline void mem_cgroup_commit_charge(struct page
*page
,
564 struct mem_cgroup
*memcg
,
565 bool lrucare
, bool compound
)
569 static inline void mem_cgroup_cancel_charge(struct page
*page
,
570 struct mem_cgroup
*memcg
,
575 static inline void mem_cgroup_uncharge(struct page
*page
)
579 static inline void mem_cgroup_uncharge_list(struct list_head
*page_list
)
583 static inline void mem_cgroup_migrate(struct page
*old
, struct page
*new)
587 static inline struct lruvec
*mem_cgroup_zone_lruvec(struct zone
*zone
,
588 struct mem_cgroup
*memcg
)
590 return &zone
->lruvec
;
593 static inline struct lruvec
*mem_cgroup_page_lruvec(struct page
*page
,
596 return &zone
->lruvec
;
599 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
600 struct mem_cgroup
*memcg
)
605 static inline bool task_in_mem_cgroup(struct task_struct
*task
,
606 const struct mem_cgroup
*memcg
)
611 static inline struct mem_cgroup
*
612 mem_cgroup_iter(struct mem_cgroup
*root
,
613 struct mem_cgroup
*prev
,
614 struct mem_cgroup_reclaim_cookie
*reclaim
)
619 static inline void mem_cgroup_iter_break(struct mem_cgroup
*root
,
620 struct mem_cgroup
*prev
)
624 static inline unsigned short mem_cgroup_id(struct mem_cgroup
*memcg
)
629 static inline struct mem_cgroup
*mem_cgroup_from_id(unsigned short id
)
632 /* XXX: This should always return root_mem_cgroup */
636 static inline bool mem_cgroup_online(struct mem_cgroup
*memcg
)
642 mem_cgroup_inactive_anon_is_low(struct lruvec
*lruvec
)
647 static inline unsigned long
648 mem_cgroup_get_lru_size(struct lruvec
*lruvec
, enum lru_list lru
)
654 mem_cgroup_update_lru_size(struct lruvec
*lruvec
, enum lru_list lru
,
660 mem_cgroup_print_oom_info(struct mem_cgroup
*memcg
, struct task_struct
*p
)
664 static inline void lock_page_memcg(struct page
*page
)
668 static inline void unlock_page_memcg(struct page
*page
)
672 static inline void mem_cgroup_handle_over_high(void)
676 static inline void mem_cgroup_oom_enable(void)
680 static inline void mem_cgroup_oom_disable(void)
684 static inline bool task_in_memcg_oom(struct task_struct
*p
)
689 static inline bool mem_cgroup_oom_synchronize(bool wait
)
694 static inline void mem_cgroup_inc_page_stat(struct page
*page
,
695 enum mem_cgroup_stat_index idx
)
699 static inline void mem_cgroup_dec_page_stat(struct page
*page
,
700 enum mem_cgroup_stat_index idx
)
705 unsigned long mem_cgroup_soft_limit_reclaim(struct zone
*zone
, int order
,
707 unsigned long *total_scanned
)
712 static inline void mem_cgroup_split_huge_fixup(struct page
*head
)
717 void mem_cgroup_count_vm_event(struct mm_struct
*mm
, enum vm_event_item idx
)
720 #endif /* CONFIG_MEMCG */
722 #ifdef CONFIG_CGROUP_WRITEBACK
724 struct list_head
*mem_cgroup_cgwb_list(struct mem_cgroup
*memcg
);
725 struct wb_domain
*mem_cgroup_wb_domain(struct bdi_writeback
*wb
);
726 void mem_cgroup_wb_stats(struct bdi_writeback
*wb
, unsigned long *pfilepages
,
727 unsigned long *pheadroom
, unsigned long *pdirty
,
728 unsigned long *pwriteback
);
730 #else /* CONFIG_CGROUP_WRITEBACK */
732 static inline struct wb_domain
*mem_cgroup_wb_domain(struct bdi_writeback
*wb
)
737 static inline void mem_cgroup_wb_stats(struct bdi_writeback
*wb
,
738 unsigned long *pfilepages
,
739 unsigned long *pheadroom
,
740 unsigned long *pdirty
,
741 unsigned long *pwriteback
)
745 #endif /* CONFIG_CGROUP_WRITEBACK */
748 void sock_update_memcg(struct sock
*sk
);
749 void sock_release_memcg(struct sock
*sk
);
750 bool mem_cgroup_charge_skmem(struct mem_cgroup
*memcg
, unsigned int nr_pages
);
751 void mem_cgroup_uncharge_skmem(struct mem_cgroup
*memcg
, unsigned int nr_pages
);
753 extern struct static_key_false memcg_sockets_enabled_key
;
754 #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key)
755 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup
*memcg
)
757 if (!cgroup_subsys_on_dfl(memory_cgrp_subsys
) && memcg
->tcpmem_pressure
)
760 if (time_before(jiffies
, memcg
->socket_pressure
))
762 } while ((memcg
= parent_mem_cgroup(memcg
)));
766 #define mem_cgroup_sockets_enabled 0
767 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup
*memcg
)
773 #if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
774 extern struct static_key_false memcg_kmem_enabled_key
;
776 extern int memcg_nr_cache_ids
;
777 void memcg_get_cache_ids(void);
778 void memcg_put_cache_ids(void);
781 * Helper macro to loop through all memcg-specific caches. Callers must still
782 * check if the cache is valid (it is either valid or NULL).
783 * the slab_mutex must be held when looping through those caches
785 #define for_each_memcg_cache_index(_idx) \
786 for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++)
788 static inline bool memcg_kmem_enabled(void)
790 return static_branch_unlikely(&memcg_kmem_enabled_key
);
793 static inline bool memcg_kmem_online(struct mem_cgroup
*memcg
)
795 return memcg
->kmem_state
== KMEM_ONLINE
;
799 * In general, we'll do everything in our power to not incur in any overhead
800 * for non-memcg users for the kmem functions. Not even a function call, if we
803 * Therefore, we'll inline all those functions so that in the best case, we'll
804 * see that kmemcg is off for everybody and proceed quickly. If it is on,
805 * we'll still do most of the flag checking inline. We check a lot of
806 * conditions, but because they are pretty simple, they are expected to be
809 int __memcg_kmem_charge_memcg(struct page
*page
, gfp_t gfp
, int order
,
810 struct mem_cgroup
*memcg
);
811 int __memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
);
812 void __memcg_kmem_uncharge(struct page
*page
, int order
);
815 * helper for accessing a memcg's index. It will be used as an index in the
816 * child cache array in kmem_cache, and also to derive its name. This function
817 * will return -1 when this is not a kmem-limited memcg.
819 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
821 return memcg
? memcg
->kmemcg_id
: -1;
824 struct kmem_cache
*__memcg_kmem_get_cache(struct kmem_cache
*cachep
, gfp_t gfp
);
825 void __memcg_kmem_put_cache(struct kmem_cache
*cachep
);
827 static inline bool __memcg_kmem_bypass(void)
829 if (!memcg_kmem_enabled())
831 if (in_interrupt() || (!current
->mm
) || (current
->flags
& PF_KTHREAD
))
837 * memcg_kmem_charge: charge a kmem page
838 * @page: page to charge
840 * @order: allocation order
842 * Returns 0 on success, an error code on failure.
844 static __always_inline
int memcg_kmem_charge(struct page
*page
,
845 gfp_t gfp
, int order
)
847 if (__memcg_kmem_bypass())
849 if (!(gfp
& __GFP_ACCOUNT
))
851 return __memcg_kmem_charge(page
, gfp
, order
);
855 * memcg_kmem_uncharge: uncharge a kmem page
856 * @page: page to uncharge
857 * @order: allocation order
859 static __always_inline
void memcg_kmem_uncharge(struct page
*page
, int order
)
861 if (memcg_kmem_enabled())
862 __memcg_kmem_uncharge(page
, order
);
866 * memcg_kmem_get_cache: selects the correct per-memcg cache for allocation
867 * @cachep: the original global kmem cache
869 * All memory allocated from a per-memcg cache is charged to the owner memcg.
871 static __always_inline
struct kmem_cache
*
872 memcg_kmem_get_cache(struct kmem_cache
*cachep
, gfp_t gfp
)
874 if (__memcg_kmem_bypass())
876 return __memcg_kmem_get_cache(cachep
, gfp
);
879 static __always_inline
void memcg_kmem_put_cache(struct kmem_cache
*cachep
)
881 if (memcg_kmem_enabled())
882 __memcg_kmem_put_cache(cachep
);
885 #define for_each_memcg_cache_index(_idx) \
888 static inline bool memcg_kmem_enabled(void)
893 static inline bool memcg_kmem_online(struct mem_cgroup
*memcg
)
898 static inline int memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
)
903 static inline void memcg_kmem_uncharge(struct page
*page
, int order
)
907 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
912 static inline void memcg_get_cache_ids(void)
916 static inline void memcg_put_cache_ids(void)
920 static inline struct kmem_cache
*
921 memcg_kmem_get_cache(struct kmem_cache
*cachep
, gfp_t gfp
)
926 static inline void memcg_kmem_put_cache(struct kmem_cache
*cachep
)
929 #endif /* CONFIG_MEMCG && !CONFIG_SLOB */
931 #endif /* _LINUX_MEMCONTROL_H */