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
;
245 spinlock_t pcp_counter_lock
;
247 #if defined(CONFIG_MEMCG_KMEM) && defined(CONFIG_INET)
248 struct cg_proto tcp_mem
;
250 #if defined(CONFIG_MEMCG_KMEM)
251 /* Index in the kmem_cache->memcg_params.memcg_caches array */
253 bool kmem_acct_activated
;
254 bool kmem_acct_active
;
257 int last_scanned_node
;
259 nodemask_t scan_nodes
;
260 atomic_t numainfo_events
;
261 atomic_t numainfo_updating
;
264 #ifdef CONFIG_CGROUP_WRITEBACK
265 struct list_head cgwb_list
;
266 struct wb_domain cgwb_domain
;
269 /* List of events which userspace want to receive */
270 struct list_head event_list
;
271 spinlock_t event_list_lock
;
273 struct mem_cgroup_per_node
*nodeinfo
[0];
274 /* WARNING: nodeinfo must be the last member here */
276 extern struct cgroup_subsys_state
*mem_cgroup_root_css
;
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
);
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
);
295 void mem_cgroup_commit_charge(struct page
*page
, struct mem_cgroup
*memcg
,
297 void mem_cgroup_cancel_charge(struct page
*page
, struct mem_cgroup
*memcg
);
298 void mem_cgroup_uncharge(struct page
*page
);
299 void mem_cgroup_uncharge_list(struct list_head
*page_list
);
301 void mem_cgroup_migrate(struct page
*oldpage
, struct page
*newpage
,
304 struct lruvec
*mem_cgroup_zone_lruvec(struct zone
*, struct mem_cgroup
*);
305 struct lruvec
*mem_cgroup_page_lruvec(struct page
*, struct zone
*);
307 bool task_in_mem_cgroup(struct task_struct
*task
, struct mem_cgroup
*memcg
);
309 struct mem_cgroup
*try_get_mem_cgroup_from_page(struct page
*page
);
310 struct mem_cgroup
*mem_cgroup_from_task(struct task_struct
*p
);
312 struct mem_cgroup
*parent_mem_cgroup(struct mem_cgroup
*memcg
);
314 struct mem_cgroup
*mem_cgroup_from_css(struct cgroup_subsys_state
*css
){
315 return css
? container_of(css
, struct mem_cgroup
, css
) : NULL
;
318 struct mem_cgroup
*mem_cgroup_iter(struct mem_cgroup
*,
320 struct mem_cgroup_reclaim_cookie
*);
321 void mem_cgroup_iter_break(struct mem_cgroup
*, struct mem_cgroup
*);
323 static inline bool mem_cgroup_is_descendant(struct mem_cgroup
*memcg
,
324 struct mem_cgroup
*root
)
328 if (!root
->use_hierarchy
)
330 return cgroup_is_descendant(memcg
->css
.cgroup
, root
->css
.cgroup
);
333 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
334 struct mem_cgroup
*memcg
)
336 struct mem_cgroup
*task_memcg
;
340 task_memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
342 match
= mem_cgroup_is_descendant(task_memcg
, memcg
);
347 struct cgroup_subsys_state
*mem_cgroup_css_from_page(struct page
*page
);
349 static inline bool mem_cgroup_disabled(void)
351 if (memory_cgrp_subsys
.disabled
)
357 * For memory reclaim.
359 int mem_cgroup_select_victim_node(struct mem_cgroup
*memcg
);
361 void mem_cgroup_update_lru_size(struct lruvec
*lruvec
, enum lru_list lru
,
364 static inline bool mem_cgroup_lruvec_online(struct lruvec
*lruvec
)
366 struct mem_cgroup_per_zone
*mz
;
367 struct mem_cgroup
*memcg
;
369 if (mem_cgroup_disabled())
372 mz
= container_of(lruvec
, struct mem_cgroup_per_zone
, lruvec
);
375 return !!(memcg
->css
.flags
& CSS_ONLINE
);
379 unsigned long mem_cgroup_get_lru_size(struct lruvec
*lruvec
, enum lru_list lru
)
381 struct mem_cgroup_per_zone
*mz
;
383 mz
= container_of(lruvec
, struct mem_cgroup_per_zone
, lruvec
);
384 return mz
->lru_size
[lru
];
387 static inline int mem_cgroup_inactive_anon_is_low(struct lruvec
*lruvec
)
389 unsigned long inactive_ratio
;
390 unsigned long inactive
;
391 unsigned long active
;
394 inactive
= mem_cgroup_get_lru_size(lruvec
, LRU_INACTIVE_ANON
);
395 active
= mem_cgroup_get_lru_size(lruvec
, LRU_ACTIVE_ANON
);
397 gb
= (inactive
+ active
) >> (30 - PAGE_SHIFT
);
399 inactive_ratio
= int_sqrt(10 * gb
);
403 return inactive
* inactive_ratio
< active
;
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_oom
.may_oom
);
412 current
->memcg_oom
.may_oom
= 1;
415 static inline void mem_cgroup_oom_disable(void)
417 WARN_ON(!current
->memcg_oom
.may_oom
);
418 current
->memcg_oom
.may_oom
= 0;
421 static inline bool task_in_memcg_oom(struct task_struct
*p
)
423 return p
->memcg_oom
.memcg
;
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 struct mem_cgroup
*try_get_mem_cgroup_from_page(struct page
*page
)
563 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
564 struct mem_cgroup
*memcg
)
569 static inline bool task_in_mem_cgroup(struct task_struct
*task
,
570 const struct mem_cgroup
*memcg
)
575 static inline struct mem_cgroup
*
576 mem_cgroup_iter(struct mem_cgroup
*root
,
577 struct mem_cgroup
*prev
,
578 struct mem_cgroup_reclaim_cookie
*reclaim
)
583 static inline void mem_cgroup_iter_break(struct mem_cgroup
*root
,
584 struct mem_cgroup
*prev
)
588 static inline bool mem_cgroup_disabled(void)
594 mem_cgroup_inactive_anon_is_low(struct lruvec
*lruvec
)
599 static inline bool mem_cgroup_lruvec_online(struct lruvec
*lruvec
)
604 static inline unsigned long
605 mem_cgroup_get_lru_size(struct lruvec
*lruvec
, enum lru_list lru
)
611 mem_cgroup_update_lru_size(struct lruvec
*lruvec
, enum lru_list lru
,
617 mem_cgroup_print_oom_info(struct mem_cgroup
*memcg
, struct task_struct
*p
)
621 static inline struct mem_cgroup
*mem_cgroup_begin_page_stat(struct page
*page
)
626 static inline void mem_cgroup_end_page_stat(struct mem_cgroup
*memcg
)
630 static inline void mem_cgroup_oom_enable(void)
634 static inline void mem_cgroup_oom_disable(void)
638 static inline bool task_in_memcg_oom(struct task_struct
*p
)
643 static inline bool mem_cgroup_oom_synchronize(bool wait
)
648 static inline void mem_cgroup_inc_page_stat(struct mem_cgroup
*memcg
,
649 enum mem_cgroup_stat_index idx
)
653 static inline void mem_cgroup_dec_page_stat(struct mem_cgroup
*memcg
,
654 enum mem_cgroup_stat_index idx
)
659 unsigned long mem_cgroup_soft_limit_reclaim(struct zone
*zone
, int order
,
661 unsigned long *total_scanned
)
666 static inline void mem_cgroup_split_huge_fixup(struct page
*head
)
671 void mem_cgroup_count_vm_event(struct mm_struct
*mm
, enum vm_event_item idx
)
674 #endif /* CONFIG_MEMCG */
682 #ifdef CONFIG_CGROUP_WRITEBACK
684 struct list_head
*mem_cgroup_cgwb_list(struct mem_cgroup
*memcg
);
685 struct wb_domain
*mem_cgroup_wb_domain(struct bdi_writeback
*wb
);
686 void mem_cgroup_wb_stats(struct bdi_writeback
*wb
, unsigned long *pavail
,
687 unsigned long *pdirty
, 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 *pavail
,
698 unsigned long *pdirty
,
699 unsigned long *pwriteback
)
703 #endif /* CONFIG_CGROUP_WRITEBACK */
706 #if defined(CONFIG_INET) && defined(CONFIG_MEMCG_KMEM)
707 void sock_update_memcg(struct sock
*sk
);
708 void sock_release_memcg(struct sock
*sk
);
710 static inline void sock_update_memcg(struct sock
*sk
)
713 static inline void sock_release_memcg(struct sock
*sk
)
716 #endif /* CONFIG_INET && CONFIG_MEMCG_KMEM */
718 #ifdef CONFIG_MEMCG_KMEM
719 extern struct static_key memcg_kmem_enabled_key
;
721 extern int memcg_nr_cache_ids
;
722 void memcg_get_cache_ids(void);
723 void memcg_put_cache_ids(void);
726 * Helper macro to loop through all memcg-specific caches. Callers must still
727 * check if the cache is valid (it is either valid or NULL).
728 * the slab_mutex must be held when looping through those caches
730 #define for_each_memcg_cache_index(_idx) \
731 for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++)
733 static inline bool memcg_kmem_enabled(void)
735 return static_key_false(&memcg_kmem_enabled_key
);
738 static inline bool memcg_kmem_is_active(struct mem_cgroup
*memcg
)
740 return memcg
->kmem_acct_active
;
744 * In general, we'll do everything in our power to not incur in any overhead
745 * for non-memcg users for the kmem functions. Not even a function call, if we
748 * Therefore, we'll inline all those functions so that in the best case, we'll
749 * see that kmemcg is off for everybody and proceed quickly. If it is on,
750 * we'll still do most of the flag checking inline. We check a lot of
751 * conditions, but because they are pretty simple, they are expected to be
754 bool __memcg_kmem_newpage_charge(gfp_t gfp
, struct mem_cgroup
**memcg
,
756 void __memcg_kmem_commit_charge(struct page
*page
,
757 struct mem_cgroup
*memcg
, int order
);
758 void __memcg_kmem_uncharge_pages(struct page
*page
, int order
);
761 * helper for acessing a memcg's index. It will be used as an index in the
762 * child cache array in kmem_cache, and also to derive its name. This function
763 * will return -1 when this is not a kmem-limited memcg.
765 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
767 return memcg
? memcg
->kmemcg_id
: -1;
770 struct kmem_cache
*__memcg_kmem_get_cache(struct kmem_cache
*cachep
);
771 void __memcg_kmem_put_cache(struct kmem_cache
*cachep
);
773 struct mem_cgroup
*__mem_cgroup_from_kmem(void *ptr
);
775 int memcg_charge_kmem(struct mem_cgroup
*memcg
, gfp_t gfp
,
776 unsigned long nr_pages
);
777 void memcg_uncharge_kmem(struct mem_cgroup
*memcg
, unsigned long nr_pages
);
780 * memcg_kmem_newpage_charge: verify if a new kmem allocation is allowed.
781 * @gfp: the gfp allocation flags.
782 * @memcg: a pointer to the memcg this was charged against.
783 * @order: allocation order.
785 * returns true if the memcg where the current task belongs can hold this
788 * We return true automatically if this allocation is not to be accounted to
792 memcg_kmem_newpage_charge(gfp_t gfp
, struct mem_cgroup
**memcg
, int order
)
794 if (!memcg_kmem_enabled())
797 if (gfp
& __GFP_NOACCOUNT
)
800 * __GFP_NOFAIL allocations will move on even if charging is not
801 * possible. Therefore we don't even try, and have this allocation
802 * unaccounted. We could in theory charge it forcibly, but we hope
803 * those allocations are rare, and won't be worth the trouble.
805 if (gfp
& __GFP_NOFAIL
)
807 if (in_interrupt() || (!current
->mm
) || (current
->flags
& PF_KTHREAD
))
810 /* If the test is dying, just let it go. */
811 if (unlikely(fatal_signal_pending(current
)))
814 return __memcg_kmem_newpage_charge(gfp
, memcg
, order
);
818 * memcg_kmem_uncharge_pages: uncharge pages from memcg
819 * @page: pointer to struct page being freed
820 * @order: allocation order.
823 memcg_kmem_uncharge_pages(struct page
*page
, int order
)
825 if (memcg_kmem_enabled())
826 __memcg_kmem_uncharge_pages(page
, order
);
830 * memcg_kmem_commit_charge: embeds correct memcg in a page
831 * @page: pointer to struct page recently allocated
832 * @memcg: the memcg structure we charged against
833 * @order: allocation order.
835 * Needs to be called after memcg_kmem_newpage_charge, regardless of success or
836 * failure of the allocation. if @page is NULL, this function will revert the
837 * charges. Otherwise, it will commit @page to @memcg.
840 memcg_kmem_commit_charge(struct page
*page
, struct mem_cgroup
*memcg
, int order
)
842 if (memcg_kmem_enabled() && memcg
)
843 __memcg_kmem_commit_charge(page
, memcg
, order
);
847 * memcg_kmem_get_cache: selects the correct per-memcg cache for allocation
848 * @cachep: the original global kmem cache
849 * @gfp: allocation flags.
851 * All memory allocated from a per-memcg cache is charged to the owner memcg.
853 static __always_inline
struct kmem_cache
*
854 memcg_kmem_get_cache(struct kmem_cache
*cachep
, gfp_t gfp
)
856 if (!memcg_kmem_enabled())
858 if (gfp
& __GFP_NOACCOUNT
)
860 if (gfp
& __GFP_NOFAIL
)
862 if (in_interrupt() || (!current
->mm
) || (current
->flags
& PF_KTHREAD
))
864 if (unlikely(fatal_signal_pending(current
)))
867 return __memcg_kmem_get_cache(cachep
);
870 static __always_inline
void memcg_kmem_put_cache(struct kmem_cache
*cachep
)
872 if (memcg_kmem_enabled())
873 __memcg_kmem_put_cache(cachep
);
876 static __always_inline
struct mem_cgroup
*mem_cgroup_from_kmem(void *ptr
)
878 if (!memcg_kmem_enabled())
880 return __mem_cgroup_from_kmem(ptr
);
883 #define for_each_memcg_cache_index(_idx) \
886 static inline bool memcg_kmem_enabled(void)
891 static inline bool memcg_kmem_is_active(struct mem_cgroup
*memcg
)
897 memcg_kmem_newpage_charge(gfp_t gfp
, struct mem_cgroup
**memcg
, int order
)
902 static inline void memcg_kmem_uncharge_pages(struct page
*page
, int order
)
907 memcg_kmem_commit_charge(struct page
*page
, struct mem_cgroup
*memcg
, int order
)
911 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
916 static inline void memcg_get_cache_ids(void)
920 static inline void memcg_put_cache_ids(void)
924 static inline struct kmem_cache
*
925 memcg_kmem_get_cache(struct kmem_cache
*cachep
, gfp_t gfp
)
930 static inline void memcg_kmem_put_cache(struct kmem_cache
*cachep
)
934 static inline struct mem_cgroup
*mem_cgroup_from_kmem(void *ptr
)
938 #endif /* CONFIG_MEMCG_KMEM */
939 #endif /* _LINUX_MEMCONTROL_H */