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_KERNEL_STACK
= MEM_CGROUP_STAT_NSTATS
,
56 MEMCG_SLAB_RECLAIMABLE
,
57 MEMCG_SLAB_UNRECLAIMABLE
,
62 struct mem_cgroup_reclaim_cookie
{
65 unsigned int generation
;
68 enum mem_cgroup_events_index
{
69 MEM_CGROUP_EVENTS_PGPGIN
, /* # of pages paged in */
70 MEM_CGROUP_EVENTS_PGPGOUT
, /* # of pages paged out */
71 MEM_CGROUP_EVENTS_PGFAULT
, /* # of page-faults */
72 MEM_CGROUP_EVENTS_PGMAJFAULT
, /* # of major page-faults */
73 MEM_CGROUP_EVENTS_NSTATS
,
74 /* default hierarchy events */
75 MEMCG_LOW
= MEM_CGROUP_EVENTS_NSTATS
,
83 * Per memcg event counter is incremented at every pagein/pageout. With THP,
84 * it will be incremated by the number of pages. This counter is used for
85 * for trigger some periodic events. This is straightforward and better
86 * than using jiffies etc. to handle periodic memcg event.
88 enum mem_cgroup_events_target
{
89 MEM_CGROUP_TARGET_THRESH
,
90 MEM_CGROUP_TARGET_SOFTLIMIT
,
91 MEM_CGROUP_TARGET_NUMAINFO
,
97 #define MEM_CGROUP_ID_SHIFT 16
98 #define MEM_CGROUP_ID_MAX USHRT_MAX
100 struct mem_cgroup_id
{
105 struct mem_cgroup_stat_cpu
{
106 long count
[MEMCG_NR_STAT
];
107 unsigned long events
[MEMCG_NR_EVENTS
];
108 unsigned long nr_page_events
;
109 unsigned long targets
[MEM_CGROUP_NTARGETS
];
112 struct mem_cgroup_reclaim_iter
{
113 struct mem_cgroup
*position
;
114 /* scan generation, increased every round-trip */
115 unsigned int generation
;
119 * per-zone information in memory controller.
121 struct mem_cgroup_per_zone
{
122 struct lruvec lruvec
;
123 unsigned long lru_size
[NR_LRU_LISTS
];
125 struct mem_cgroup_reclaim_iter iter
[DEF_PRIORITY
+ 1];
127 struct rb_node tree_node
; /* RB tree node */
128 unsigned long usage_in_excess
;/* Set to the value by which */
129 /* the soft limit is exceeded*/
131 struct mem_cgroup
*memcg
; /* Back pointer, we cannot */
132 /* use container_of */
135 struct mem_cgroup_per_node
{
136 struct mem_cgroup_per_zone zoneinfo
[MAX_NR_ZONES
];
139 struct mem_cgroup_threshold
{
140 struct eventfd_ctx
*eventfd
;
141 unsigned long threshold
;
145 struct mem_cgroup_threshold_ary
{
146 /* An array index points to threshold just below or equal to usage. */
147 int current_threshold
;
148 /* Size of entries[] */
150 /* Array of thresholds */
151 struct mem_cgroup_threshold entries
[0];
154 struct mem_cgroup_thresholds
{
155 /* Primary thresholds array */
156 struct mem_cgroup_threshold_ary
*primary
;
158 * Spare threshold array.
159 * This is needed to make mem_cgroup_unregister_event() "never fail".
160 * It must be able to store at least primary->size - 1 entries.
162 struct mem_cgroup_threshold_ary
*spare
;
165 enum memcg_kmem_state
{
172 * The memory controller data structure. The memory controller controls both
173 * page cache and RSS per cgroup. We would eventually like to provide
174 * statistics based on the statistics developed by Rik Van Riel for clock-pro,
175 * to help the administrator determine what knobs to tune.
178 struct cgroup_subsys_state css
;
180 /* Private memcg ID. Used to ID objects that outlive the cgroup */
181 struct mem_cgroup_id id
;
183 /* Accounted resources */
184 struct page_counter memory
;
185 struct page_counter swap
;
187 /* Legacy consumer-oriented counters */
188 struct page_counter memsw
;
189 struct page_counter kmem
;
190 struct page_counter tcpmem
;
192 /* Normal memory consumption range */
196 /* Range enforcement for interrupt charges */
197 struct work_struct high_work
;
199 unsigned long soft_limit
;
201 /* vmpressure notifications */
202 struct vmpressure vmpressure
;
205 * Should the accounting and control be hierarchical, per subtree?
209 /* protected by memcg_oom_lock */
214 /* OOM-Killer disable */
215 int oom_kill_disable
;
217 /* handle for "memory.events" */
218 struct cgroup_file events_file
;
220 /* protect arrays of thresholds */
221 struct mutex thresholds_lock
;
223 /* thresholds for memory usage. RCU-protected */
224 struct mem_cgroup_thresholds thresholds
;
226 /* thresholds for mem+swap usage. RCU-protected */
227 struct mem_cgroup_thresholds memsw_thresholds
;
229 /* For oom notifier event fd */
230 struct list_head oom_notify
;
233 * Should we move charges of a task when a task is moved into this
234 * mem_cgroup ? And what type of charges should we move ?
236 unsigned long move_charge_at_immigrate
;
238 * set > 0 if pages under this cgroup are moving to other cgroup.
240 atomic_t moving_account
;
241 /* taken only while moving_account > 0 */
242 spinlock_t move_lock
;
243 struct task_struct
*move_lock_task
;
244 unsigned long move_lock_flags
;
248 struct mem_cgroup_stat_cpu __percpu
*stat
;
250 unsigned long socket_pressure
;
252 /* Legacy tcp memory accounting */
257 /* Index in the kmem_cache->memcg_params.memcg_caches array */
259 enum memcg_kmem_state kmem_state
;
262 int last_scanned_node
;
264 nodemask_t scan_nodes
;
265 atomic_t numainfo_events
;
266 atomic_t numainfo_updating
;
269 #ifdef CONFIG_CGROUP_WRITEBACK
270 struct list_head cgwb_list
;
271 struct wb_domain cgwb_domain
;
274 /* List of events which userspace want to receive */
275 struct list_head event_list
;
276 spinlock_t event_list_lock
;
278 struct mem_cgroup_per_node
*nodeinfo
[0];
279 /* WARNING: nodeinfo must be the last member here */
282 extern struct mem_cgroup
*root_mem_cgroup
;
284 static inline bool mem_cgroup_disabled(void)
286 return !cgroup_subsys_enabled(memory_cgrp_subsys
);
290 * mem_cgroup_events - count memory events against a cgroup
291 * @memcg: the memory cgroup
292 * @idx: the event index
293 * @nr: the number of events to account for
295 static inline void mem_cgroup_events(struct mem_cgroup
*memcg
,
296 enum mem_cgroup_events_index idx
,
299 this_cpu_add(memcg
->stat
->events
[idx
], nr
);
300 cgroup_file_notify(&memcg
->events_file
);
303 bool mem_cgroup_low(struct mem_cgroup
*root
, struct mem_cgroup
*memcg
);
305 int mem_cgroup_try_charge(struct page
*page
, struct mm_struct
*mm
,
306 gfp_t gfp_mask
, struct mem_cgroup
**memcgp
,
308 void mem_cgroup_commit_charge(struct page
*page
, struct mem_cgroup
*memcg
,
309 bool lrucare
, bool compound
);
310 void mem_cgroup_cancel_charge(struct page
*page
, struct mem_cgroup
*memcg
,
312 void mem_cgroup_uncharge(struct page
*page
);
313 void mem_cgroup_uncharge_list(struct list_head
*page_list
);
315 void mem_cgroup_migrate(struct page
*oldpage
, struct page
*newpage
);
317 struct lruvec
*mem_cgroup_zone_lruvec(struct zone
*, struct mem_cgroup
*);
318 struct lruvec
*mem_cgroup_page_lruvec(struct page
*, struct zone
*);
320 bool task_in_mem_cgroup(struct task_struct
*task
, struct mem_cgroup
*memcg
);
321 struct mem_cgroup
*mem_cgroup_from_task(struct task_struct
*p
);
324 struct mem_cgroup
*mem_cgroup_from_css(struct cgroup_subsys_state
*css
){
325 return css
? container_of(css
, struct mem_cgroup
, css
) : NULL
;
328 #define mem_cgroup_from_counter(counter, member) \
329 container_of(counter, struct mem_cgroup, member)
331 struct mem_cgroup
*mem_cgroup_iter(struct mem_cgroup
*,
333 struct mem_cgroup_reclaim_cookie
*);
334 void mem_cgroup_iter_break(struct mem_cgroup
*, struct mem_cgroup
*);
336 static inline unsigned short mem_cgroup_id(struct mem_cgroup
*memcg
)
338 if (mem_cgroup_disabled())
343 struct mem_cgroup
*mem_cgroup_from_id(unsigned short id
);
346 * parent_mem_cgroup - find the accounting parent of a memcg
347 * @memcg: memcg whose parent to find
349 * Returns the parent memcg, or NULL if this is the root or the memory
350 * controller is in legacy no-hierarchy mode.
352 static inline struct mem_cgroup
*parent_mem_cgroup(struct mem_cgroup
*memcg
)
354 if (!memcg
->memory
.parent
)
356 return mem_cgroup_from_counter(memcg
->memory
.parent
, memory
);
359 static inline bool mem_cgroup_is_descendant(struct mem_cgroup
*memcg
,
360 struct mem_cgroup
*root
)
364 if (!root
->use_hierarchy
)
366 return cgroup_is_descendant(memcg
->css
.cgroup
, root
->css
.cgroup
);
369 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
370 struct mem_cgroup
*memcg
)
372 struct mem_cgroup
*task_memcg
;
376 task_memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
378 match
= mem_cgroup_is_descendant(task_memcg
, memcg
);
383 struct cgroup_subsys_state
*mem_cgroup_css_from_page(struct page
*page
);
384 ino_t
page_cgroup_ino(struct page
*page
);
386 static inline bool mem_cgroup_online(struct mem_cgroup
*memcg
)
388 if (mem_cgroup_disabled())
390 return !!(memcg
->css
.flags
& CSS_ONLINE
);
394 * For memory reclaim.
396 int mem_cgroup_select_victim_node(struct mem_cgroup
*memcg
);
398 void mem_cgroup_update_lru_size(struct lruvec
*lruvec
, enum lru_list lru
,
401 unsigned long mem_cgroup_node_nr_lru_pages(struct mem_cgroup
*memcg
,
402 int nid
, unsigned int lru_mask
);
405 unsigned long mem_cgroup_get_lru_size(struct lruvec
*lruvec
, enum lru_list lru
)
407 struct mem_cgroup_per_zone
*mz
;
409 mz
= container_of(lruvec
, struct mem_cgroup_per_zone
, lruvec
);
410 return mz
->lru_size
[lru
];
413 void mem_cgroup_handle_over_high(void);
415 void mem_cgroup_print_oom_info(struct mem_cgroup
*memcg
,
416 struct task_struct
*p
);
418 static inline void mem_cgroup_oom_enable(void)
420 WARN_ON(current
->memcg_may_oom
);
421 current
->memcg_may_oom
= 1;
424 static inline void mem_cgroup_oom_disable(void)
426 WARN_ON(!current
->memcg_may_oom
);
427 current
->memcg_may_oom
= 0;
430 static inline bool task_in_memcg_oom(struct task_struct
*p
)
432 return p
->memcg_in_oom
;
435 bool mem_cgroup_oom_synchronize(bool wait
);
437 #ifdef CONFIG_MEMCG_SWAP
438 extern int do_swap_account
;
441 void lock_page_memcg(struct page
*page
);
442 void unlock_page_memcg(struct page
*page
);
445 * mem_cgroup_update_page_stat - update page state statistics
447 * @idx: page state item to account
448 * @val: number of pages (positive or negative)
450 * The @page must be locked or the caller must use lock_page_memcg()
451 * to prevent double accounting when the page is concurrently being
452 * moved to another memcg:
454 * lock_page(page) or lock_page_memcg(page)
455 * if (TestClearPageState(page))
456 * mem_cgroup_update_page_stat(page, state, -1);
457 * unlock_page(page) or unlock_page_memcg(page)
459 static inline void mem_cgroup_update_page_stat(struct page
*page
,
460 enum mem_cgroup_stat_index idx
, int val
)
462 VM_BUG_ON(!(rcu_read_lock_held() || PageLocked(page
)));
464 if (page
->mem_cgroup
)
465 this_cpu_add(page
->mem_cgroup
->stat
->count
[idx
], val
);
468 static inline void mem_cgroup_inc_page_stat(struct page
*page
,
469 enum mem_cgroup_stat_index idx
)
471 mem_cgroup_update_page_stat(page
, idx
, 1);
474 static inline void mem_cgroup_dec_page_stat(struct page
*page
,
475 enum mem_cgroup_stat_index idx
)
477 mem_cgroup_update_page_stat(page
, idx
, -1);
480 unsigned long mem_cgroup_soft_limit_reclaim(struct zone
*zone
, int order
,
482 unsigned long *total_scanned
);
484 static inline void mem_cgroup_count_vm_event(struct mm_struct
*mm
,
485 enum vm_event_item idx
)
487 struct mem_cgroup
*memcg
;
489 if (mem_cgroup_disabled())
493 memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
494 if (unlikely(!memcg
))
499 this_cpu_inc(memcg
->stat
->events
[MEM_CGROUP_EVENTS_PGFAULT
]);
502 this_cpu_inc(memcg
->stat
->events
[MEM_CGROUP_EVENTS_PGMAJFAULT
]);
510 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
511 void mem_cgroup_split_huge_fixup(struct page
*head
);
514 #else /* CONFIG_MEMCG */
516 #define MEM_CGROUP_ID_SHIFT 0
517 #define MEM_CGROUP_ID_MAX 0
521 static inline bool mem_cgroup_disabled(void)
526 static inline void mem_cgroup_events(struct mem_cgroup
*memcg
,
527 enum mem_cgroup_events_index idx
,
532 static inline bool mem_cgroup_low(struct mem_cgroup
*root
,
533 struct mem_cgroup
*memcg
)
538 static inline int mem_cgroup_try_charge(struct page
*page
, struct mm_struct
*mm
,
540 struct mem_cgroup
**memcgp
,
547 static inline void mem_cgroup_commit_charge(struct page
*page
,
548 struct mem_cgroup
*memcg
,
549 bool lrucare
, bool compound
)
553 static inline void mem_cgroup_cancel_charge(struct page
*page
,
554 struct mem_cgroup
*memcg
,
559 static inline void mem_cgroup_uncharge(struct page
*page
)
563 static inline void mem_cgroup_uncharge_list(struct list_head
*page_list
)
567 static inline void mem_cgroup_migrate(struct page
*old
, struct page
*new)
571 static inline struct lruvec
*mem_cgroup_zone_lruvec(struct zone
*zone
,
572 struct mem_cgroup
*memcg
)
574 return &zone
->lruvec
;
577 static inline struct lruvec
*mem_cgroup_page_lruvec(struct page
*page
,
580 return &zone
->lruvec
;
583 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
584 struct mem_cgroup
*memcg
)
589 static inline bool task_in_mem_cgroup(struct task_struct
*task
,
590 const struct mem_cgroup
*memcg
)
595 static inline struct mem_cgroup
*
596 mem_cgroup_iter(struct mem_cgroup
*root
,
597 struct mem_cgroup
*prev
,
598 struct mem_cgroup_reclaim_cookie
*reclaim
)
603 static inline void mem_cgroup_iter_break(struct mem_cgroup
*root
,
604 struct mem_cgroup
*prev
)
608 static inline unsigned short mem_cgroup_id(struct mem_cgroup
*memcg
)
613 static inline struct mem_cgroup
*mem_cgroup_from_id(unsigned short id
)
616 /* XXX: This should always return root_mem_cgroup */
620 static inline bool mem_cgroup_online(struct mem_cgroup
*memcg
)
625 static inline unsigned long
626 mem_cgroup_get_lru_size(struct lruvec
*lruvec
, enum lru_list lru
)
631 static inline unsigned long
632 mem_cgroup_node_nr_lru_pages(struct mem_cgroup
*memcg
,
633 int nid
, unsigned int lru_mask
)
639 mem_cgroup_print_oom_info(struct mem_cgroup
*memcg
, struct task_struct
*p
)
643 static inline void lock_page_memcg(struct page
*page
)
647 static inline void unlock_page_memcg(struct page
*page
)
651 static inline void mem_cgroup_handle_over_high(void)
655 static inline void mem_cgroup_oom_enable(void)
659 static inline void mem_cgroup_oom_disable(void)
663 static inline bool task_in_memcg_oom(struct task_struct
*p
)
668 static inline bool mem_cgroup_oom_synchronize(bool wait
)
673 static inline void mem_cgroup_inc_page_stat(struct page
*page
,
674 enum mem_cgroup_stat_index idx
)
678 static inline void mem_cgroup_dec_page_stat(struct page
*page
,
679 enum mem_cgroup_stat_index idx
)
684 unsigned long mem_cgroup_soft_limit_reclaim(struct zone
*zone
, int order
,
686 unsigned long *total_scanned
)
691 static inline void mem_cgroup_split_huge_fixup(struct page
*head
)
696 void mem_cgroup_count_vm_event(struct mm_struct
*mm
, enum vm_event_item idx
)
699 #endif /* CONFIG_MEMCG */
701 #ifdef CONFIG_CGROUP_WRITEBACK
703 struct list_head
*mem_cgroup_cgwb_list(struct mem_cgroup
*memcg
);
704 struct wb_domain
*mem_cgroup_wb_domain(struct bdi_writeback
*wb
);
705 void mem_cgroup_wb_stats(struct bdi_writeback
*wb
, unsigned long *pfilepages
,
706 unsigned long *pheadroom
, unsigned long *pdirty
,
707 unsigned long *pwriteback
);
709 #else /* CONFIG_CGROUP_WRITEBACK */
711 static inline struct wb_domain
*mem_cgroup_wb_domain(struct bdi_writeback
*wb
)
716 static inline void mem_cgroup_wb_stats(struct bdi_writeback
*wb
,
717 unsigned long *pfilepages
,
718 unsigned long *pheadroom
,
719 unsigned long *pdirty
,
720 unsigned long *pwriteback
)
724 #endif /* CONFIG_CGROUP_WRITEBACK */
727 void sock_update_memcg(struct sock
*sk
);
728 void sock_release_memcg(struct sock
*sk
);
729 bool mem_cgroup_charge_skmem(struct mem_cgroup
*memcg
, unsigned int nr_pages
);
730 void mem_cgroup_uncharge_skmem(struct mem_cgroup
*memcg
, unsigned int nr_pages
);
732 extern struct static_key_false memcg_sockets_enabled_key
;
733 #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key)
734 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup
*memcg
)
736 if (!cgroup_subsys_on_dfl(memory_cgrp_subsys
) && memcg
->tcpmem_pressure
)
739 if (time_before(jiffies
, memcg
->socket_pressure
))
741 } while ((memcg
= parent_mem_cgroup(memcg
)));
745 #define mem_cgroup_sockets_enabled 0
746 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup
*memcg
)
752 #if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
753 extern struct static_key_false memcg_kmem_enabled_key
;
755 extern int memcg_nr_cache_ids
;
756 void memcg_get_cache_ids(void);
757 void memcg_put_cache_ids(void);
760 * Helper macro to loop through all memcg-specific caches. Callers must still
761 * check if the cache is valid (it is either valid or NULL).
762 * the slab_mutex must be held when looping through those caches
764 #define for_each_memcg_cache_index(_idx) \
765 for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++)
767 static inline bool memcg_kmem_enabled(void)
769 return static_branch_unlikely(&memcg_kmem_enabled_key
);
773 * In general, we'll do everything in our power to not incur in any overhead
774 * for non-memcg users for the kmem functions. Not even a function call, if we
777 * Therefore, we'll inline all those functions so that in the best case, we'll
778 * see that kmemcg is off for everybody and proceed quickly. If it is on,
779 * we'll still do most of the flag checking inline. We check a lot of
780 * conditions, but because they are pretty simple, they are expected to be
783 int __memcg_kmem_charge_memcg(struct page
*page
, gfp_t gfp
, int order
,
784 struct mem_cgroup
*memcg
);
785 int __memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
);
786 void __memcg_kmem_uncharge(struct page
*page
, int order
);
789 * helper for accessing a memcg's index. It will be used as an index in the
790 * child cache array in kmem_cache, and also to derive its name. This function
791 * will return -1 when this is not a kmem-limited memcg.
793 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
795 return memcg
? memcg
->kmemcg_id
: -1;
798 struct kmem_cache
*__memcg_kmem_get_cache(struct kmem_cache
*cachep
, gfp_t gfp
);
799 void __memcg_kmem_put_cache(struct kmem_cache
*cachep
);
801 static inline bool __memcg_kmem_bypass(void)
803 if (!memcg_kmem_enabled())
805 if (in_interrupt() || (!current
->mm
) || (current
->flags
& PF_KTHREAD
))
811 * memcg_kmem_charge: charge a kmem page
812 * @page: page to charge
814 * @order: allocation order
816 * Returns 0 on success, an error code on failure.
818 static __always_inline
int memcg_kmem_charge(struct page
*page
,
819 gfp_t gfp
, int order
)
821 if (__memcg_kmem_bypass())
823 if (!(gfp
& __GFP_ACCOUNT
))
825 return __memcg_kmem_charge(page
, gfp
, order
);
829 * memcg_kmem_uncharge: uncharge a kmem page
830 * @page: page to uncharge
831 * @order: allocation order
833 static __always_inline
void memcg_kmem_uncharge(struct page
*page
, int order
)
835 if (memcg_kmem_enabled())
836 __memcg_kmem_uncharge(page
, order
);
840 * memcg_kmem_get_cache: selects the correct per-memcg cache for allocation
841 * @cachep: the original global kmem cache
843 * All memory allocated from a per-memcg cache is charged to the owner memcg.
845 static __always_inline
struct kmem_cache
*
846 memcg_kmem_get_cache(struct kmem_cache
*cachep
, gfp_t gfp
)
848 if (__memcg_kmem_bypass())
850 return __memcg_kmem_get_cache(cachep
, gfp
);
853 static __always_inline
void memcg_kmem_put_cache(struct kmem_cache
*cachep
)
855 if (memcg_kmem_enabled())
856 __memcg_kmem_put_cache(cachep
);
860 * memcg_kmem_update_page_stat - update kmem page state statistics
862 * @idx: page state item to account
863 * @val: number of pages (positive or negative)
865 static inline void memcg_kmem_update_page_stat(struct page
*page
,
866 enum mem_cgroup_stat_index idx
, int val
)
868 if (memcg_kmem_enabled() && page
->mem_cgroup
)
869 this_cpu_add(page
->mem_cgroup
->stat
->count
[idx
], val
);
873 #define for_each_memcg_cache_index(_idx) \
876 static inline bool memcg_kmem_enabled(void)
881 static inline int memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
)
886 static inline void memcg_kmem_uncharge(struct page
*page
, int order
)
890 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
895 static inline void memcg_get_cache_ids(void)
899 static inline void memcg_put_cache_ids(void)
903 static inline struct kmem_cache
*
904 memcg_kmem_get_cache(struct kmem_cache
*cachep
, gfp_t gfp
)
909 static inline void memcg_kmem_put_cache(struct kmem_cache
*cachep
)
913 static inline void memcg_kmem_update_page_stat(struct page
*page
,
914 enum mem_cgroup_stat_index idx
, int val
)
917 #endif /* CONFIG_MEMCG && !CONFIG_SLOB */
919 #endif /* _LINUX_MEMCONTROL_H */