1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* memcontrol.h - Memory Controller
4 * Copyright IBM Corporation, 2007
5 * Author Balbir Singh <balbir@linux.vnet.ibm.com>
7 * Copyright 2007 OpenVZ SWsoft Inc
8 * Author: Pavel Emelianov <xemul@openvz.org>
11 #ifndef _LINUX_MEMCONTROL_H
12 #define _LINUX_MEMCONTROL_H
13 #include <linux/cgroup.h>
14 #include <linux/vm_event_item.h>
15 #include <linux/hardirq.h>
16 #include <linux/jump_label.h>
17 #include <linux/page_counter.h>
18 #include <linux/vmpressure.h>
19 #include <linux/eventfd.h>
21 #include <linux/vmstat.h>
22 #include <linux/writeback.h>
23 #include <linux/page-flags.h>
31 /* Cgroup-specific page state, on top of universal node page state */
32 enum memcg_stat_item
{
33 MEMCG_SWAP
= NR_VM_NODE_STAT_ITEMS
,
39 enum memcg_memory_event
{
48 MEMCG_NR_MEMORY_EVENTS
,
51 struct mem_cgroup_reclaim_cookie
{
53 unsigned int generation
;
58 #define MEM_CGROUP_ID_SHIFT 16
59 #define MEM_CGROUP_ID_MAX USHRT_MAX
61 struct mem_cgroup_id
{
67 * Per memcg event counter is incremented at every pagein/pageout. With THP,
68 * it will be incremented by the number of pages. This counter is used
69 * to trigger some periodic events. This is straightforward and better
70 * than using jiffies etc. to handle periodic memcg event.
72 enum mem_cgroup_events_target
{
73 MEM_CGROUP_TARGET_THRESH
,
74 MEM_CGROUP_TARGET_SOFTLIMIT
,
78 struct memcg_vmstats_percpu
{
79 /* Local (CPU and cgroup) page state & events */
80 long state
[MEMCG_NR_STAT
];
81 unsigned long events
[NR_VM_EVENT_ITEMS
];
83 /* Delta calculation for lockless upward propagation */
84 long state_prev
[MEMCG_NR_STAT
];
85 unsigned long events_prev
[NR_VM_EVENT_ITEMS
];
87 /* Cgroup1: threshold notifications & softlimit tree updates */
88 unsigned long nr_page_events
;
89 unsigned long targets
[MEM_CGROUP_NTARGETS
];
92 struct memcg_vmstats
{
93 /* Aggregated (CPU and subtree) page state & events */
94 long state
[MEMCG_NR_STAT
];
95 unsigned long events
[NR_VM_EVENT_ITEMS
];
97 /* Pending child counts during tree propagation */
98 long state_pending
[MEMCG_NR_STAT
];
99 unsigned long events_pending
[NR_VM_EVENT_ITEMS
];
102 struct mem_cgroup_reclaim_iter
{
103 struct mem_cgroup
*position
;
104 /* scan generation, increased every round-trip */
105 unsigned int generation
;
109 long count
[NR_VM_NODE_STAT_ITEMS
];
112 struct batched_lruvec_stat
{
113 s32 count
[NR_VM_NODE_STAT_ITEMS
];
117 * Bitmap and deferred work of shrinker::id corresponding to memcg-aware
118 * shrinkers, which have elements charged to this memcg.
120 struct shrinker_info
{
122 atomic_long_t
*nr_deferred
;
127 * per-node information in memory controller.
129 struct mem_cgroup_per_node
{
130 struct lruvec lruvec
;
133 * Legacy local VM stats. This should be struct lruvec_stat and
134 * cannot be optimized to struct batched_lruvec_stat. Because
135 * the threshold of the lruvec_stat_cpu can be as big as
136 * MEMCG_CHARGE_BATCH * PAGE_SIZE. It can fit into s32. But this
137 * filed has no upper limit.
139 struct lruvec_stat __percpu
*lruvec_stat_local
;
141 /* Subtree VM stats (batched updates) */
142 struct batched_lruvec_stat __percpu
*lruvec_stat_cpu
;
143 atomic_long_t lruvec_stat
[NR_VM_NODE_STAT_ITEMS
];
145 unsigned long lru_zone_size
[MAX_NR_ZONES
][NR_LRU_LISTS
];
147 struct mem_cgroup_reclaim_iter iter
;
149 struct shrinker_info __rcu
*shrinker_info
;
151 struct rb_node tree_node
; /* RB tree node */
152 unsigned long usage_in_excess
;/* Set to the value by which */
153 /* the soft limit is exceeded*/
155 struct mem_cgroup
*memcg
; /* Back pointer, we cannot */
156 /* use container_of */
159 struct mem_cgroup_threshold
{
160 struct eventfd_ctx
*eventfd
;
161 unsigned long threshold
;
165 struct mem_cgroup_threshold_ary
{
166 /* An array index points to threshold just below or equal to usage. */
167 int current_threshold
;
168 /* Size of entries[] */
170 /* Array of thresholds */
171 struct mem_cgroup_threshold entries
[];
174 struct mem_cgroup_thresholds
{
175 /* Primary thresholds array */
176 struct mem_cgroup_threshold_ary
*primary
;
178 * Spare threshold array.
179 * This is needed to make mem_cgroup_unregister_event() "never fail".
180 * It must be able to store at least primary->size - 1 entries.
182 struct mem_cgroup_threshold_ary
*spare
;
185 enum memcg_kmem_state
{
191 #if defined(CONFIG_SMP)
192 struct memcg_padding
{
194 } ____cacheline_internodealigned_in_smp
;
195 #define MEMCG_PADDING(name) struct memcg_padding name
197 #define MEMCG_PADDING(name)
201 * Remember four most recent foreign writebacks with dirty pages in this
202 * cgroup. Inode sharing is expected to be uncommon and, even if we miss
203 * one in a given round, we're likely to catch it later if it keeps
204 * foreign-dirtying, so a fairly low count should be enough.
206 * See mem_cgroup_track_foreign_dirty_slowpath() for details.
208 #define MEMCG_CGWB_FRN_CNT 4
210 struct memcg_cgwb_frn
{
211 u64 bdi_id
; /* bdi->id of the foreign inode */
212 int memcg_id
; /* memcg->css.id of foreign inode */
213 u64 at
; /* jiffies_64 at the time of dirtying */
214 struct wb_completion done
; /* tracks in-flight foreign writebacks */
218 * Bucket for arbitrarily byte-sized objects charged to a memory
219 * cgroup. The bucket can be reparented in one piece when the cgroup
220 * is destroyed, without having to round up the individual references
221 * of all live memory objects in the wild.
224 struct percpu_ref refcnt
;
225 struct mem_cgroup
*memcg
;
226 atomic_t nr_charged_bytes
;
228 struct list_head list
;
234 * The memory controller data structure. The memory controller controls both
235 * page cache and RSS per cgroup. We would eventually like to provide
236 * statistics based on the statistics developed by Rik Van Riel for clock-pro,
237 * to help the administrator determine what knobs to tune.
240 struct cgroup_subsys_state css
;
242 /* Private memcg ID. Used to ID objects that outlive the cgroup */
243 struct mem_cgroup_id id
;
245 /* Accounted resources */
246 struct page_counter memory
; /* Both v1 & v2 */
249 struct page_counter swap
; /* v2 only */
250 struct page_counter memsw
; /* v1 only */
253 /* Legacy consumer-oriented counters */
254 struct page_counter kmem
; /* v1 only */
255 struct page_counter tcpmem
; /* v1 only */
257 /* Range enforcement for interrupt charges */
258 struct work_struct high_work
;
260 unsigned long soft_limit
;
262 /* vmpressure notifications */
263 struct vmpressure vmpressure
;
266 * Should the OOM killer kill all belonging tasks, had it kill one?
270 /* protected by memcg_oom_lock */
275 /* OOM-Killer disable */
276 int oom_kill_disable
;
278 /* memory.events and memory.events.local */
279 struct cgroup_file events_file
;
280 struct cgroup_file events_local_file
;
282 /* handle for "memory.swap.events" */
283 struct cgroup_file swap_events_file
;
285 /* protect arrays of thresholds */
286 struct mutex thresholds_lock
;
288 /* thresholds for memory usage. RCU-protected */
289 struct mem_cgroup_thresholds thresholds
;
291 /* thresholds for mem+swap usage. RCU-protected */
292 struct mem_cgroup_thresholds memsw_thresholds
;
294 /* For oom notifier event fd */
295 struct list_head oom_notify
;
298 * Should we move charges of a task when a task is moved into this
299 * mem_cgroup ? And what type of charges should we move ?
301 unsigned long move_charge_at_immigrate
;
302 /* taken only while moving_account > 0 */
303 spinlock_t move_lock
;
304 unsigned long move_lock_flags
;
306 MEMCG_PADDING(_pad1_
);
309 struct memcg_vmstats vmstats
;
312 atomic_long_t memory_events
[MEMCG_NR_MEMORY_EVENTS
];
313 atomic_long_t memory_events_local
[MEMCG_NR_MEMORY_EVENTS
];
315 unsigned long socket_pressure
;
317 /* Legacy tcp memory accounting */
321 #ifdef CONFIG_MEMCG_KMEM
323 enum memcg_kmem_state kmem_state
;
324 struct obj_cgroup __rcu
*objcg
;
325 struct list_head objcg_list
; /* list of inherited objcgs */
328 MEMCG_PADDING(_pad2_
);
331 * set > 0 if pages under this cgroup are moving to other cgroup.
333 atomic_t moving_account
;
334 struct task_struct
*move_lock_task
;
336 struct memcg_vmstats_percpu __percpu
*vmstats_percpu
;
338 #ifdef CONFIG_CGROUP_WRITEBACK
339 struct list_head cgwb_list
;
340 struct wb_domain cgwb_domain
;
341 struct memcg_cgwb_frn cgwb_frn
[MEMCG_CGWB_FRN_CNT
];
344 /* List of events which userspace want to receive */
345 struct list_head event_list
;
346 spinlock_t event_list_lock
;
348 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
349 struct deferred_split deferred_split_queue
;
352 struct mem_cgroup_per_node
*nodeinfo
[];
356 * size of first charge trial. "32" comes from vmscan.c's magic value.
357 * TODO: maybe necessary to use big numbers in big irons.
359 #define MEMCG_CHARGE_BATCH 32U
361 extern struct mem_cgroup
*root_mem_cgroup
;
363 enum page_memcg_data_flags
{
364 /* page->memcg_data is a pointer to an objcgs vector */
365 MEMCG_DATA_OBJCGS
= (1UL << 0),
366 /* page has been accounted as a non-slab kernel page */
367 MEMCG_DATA_KMEM
= (1UL << 1),
368 /* the next bit after the last actual flag */
369 __NR_MEMCG_DATA_FLAGS
= (1UL << 2),
372 #define MEMCG_DATA_FLAGS_MASK (__NR_MEMCG_DATA_FLAGS - 1)
374 static inline bool PageMemcgKmem(struct page
*page
);
377 * After the initialization objcg->memcg is always pointing at
378 * a valid memcg, but can be atomically swapped to the parent memcg.
380 * The caller must ensure that the returned memcg won't be released:
381 * e.g. acquire the rcu_read_lock or css_set_lock.
383 static inline struct mem_cgroup
*obj_cgroup_memcg(struct obj_cgroup
*objcg
)
385 return READ_ONCE(objcg
->memcg
);
389 * __page_memcg - get the memory cgroup associated with a non-kmem page
390 * @page: a pointer to the page struct
392 * Returns a pointer to the memory cgroup associated with the page,
393 * or NULL. This function assumes that the page is known to have a
394 * proper memory cgroup pointer. It's not safe to call this function
395 * against some type of pages, e.g. slab pages or ex-slab pages or
398 static inline struct mem_cgroup
*__page_memcg(struct page
*page
)
400 unsigned long memcg_data
= page
->memcg_data
;
402 VM_BUG_ON_PAGE(PageSlab(page
), page
);
403 VM_BUG_ON_PAGE(memcg_data
& MEMCG_DATA_OBJCGS
, page
);
404 VM_BUG_ON_PAGE(memcg_data
& MEMCG_DATA_KMEM
, page
);
406 return (struct mem_cgroup
*)(memcg_data
& ~MEMCG_DATA_FLAGS_MASK
);
410 * __page_objcg - get the object cgroup associated with a kmem page
411 * @page: a pointer to the page struct
413 * Returns a pointer to the object cgroup associated with the page,
414 * or NULL. This function assumes that the page is known to have a
415 * proper object cgroup pointer. It's not safe to call this function
416 * against some type of pages, e.g. slab pages or ex-slab pages or
419 static inline struct obj_cgroup
*__page_objcg(struct page
*page
)
421 unsigned long memcg_data
= page
->memcg_data
;
423 VM_BUG_ON_PAGE(PageSlab(page
), page
);
424 VM_BUG_ON_PAGE(memcg_data
& MEMCG_DATA_OBJCGS
, page
);
425 VM_BUG_ON_PAGE(!(memcg_data
& MEMCG_DATA_KMEM
), page
);
427 return (struct obj_cgroup
*)(memcg_data
& ~MEMCG_DATA_FLAGS_MASK
);
431 * page_memcg - get the memory cgroup associated with a page
432 * @page: a pointer to the page struct
434 * Returns a pointer to the memory cgroup associated with the page,
435 * or NULL. This function assumes that the page is known to have a
436 * proper memory cgroup pointer. It's not safe to call this function
437 * against some type of pages, e.g. slab pages or ex-slab pages.
439 * For a non-kmem page any of the following ensures page and memcg binding
444 * - lock_page_memcg()
445 * - exclusive reference
447 * For a kmem page a caller should hold an rcu read lock to protect memcg
448 * associated with a kmem page from being released.
450 static inline struct mem_cgroup
*page_memcg(struct page
*page
)
452 if (PageMemcgKmem(page
))
453 return obj_cgroup_memcg(__page_objcg(page
));
455 return __page_memcg(page
);
459 * page_memcg_rcu - locklessly get the memory cgroup associated with a page
460 * @page: a pointer to the page struct
462 * Returns a pointer to the memory cgroup associated with the page,
463 * or NULL. This function assumes that the page is known to have a
464 * proper memory cgroup pointer. It's not safe to call this function
465 * against some type of pages, e.g. slab pages or ex-slab pages.
467 static inline struct mem_cgroup
*page_memcg_rcu(struct page
*page
)
469 unsigned long memcg_data
= READ_ONCE(page
->memcg_data
);
471 VM_BUG_ON_PAGE(PageSlab(page
), page
);
472 WARN_ON_ONCE(!rcu_read_lock_held());
474 if (memcg_data
& MEMCG_DATA_KMEM
) {
475 struct obj_cgroup
*objcg
;
477 objcg
= (void *)(memcg_data
& ~MEMCG_DATA_FLAGS_MASK
);
478 return obj_cgroup_memcg(objcg
);
481 return (struct mem_cgroup
*)(memcg_data
& ~MEMCG_DATA_FLAGS_MASK
);
485 * page_memcg_check - get the memory cgroup associated with a page
486 * @page: a pointer to the page struct
488 * Returns a pointer to the memory cgroup associated with the page,
489 * or NULL. This function unlike page_memcg() can take any page
490 * as an argument. It has to be used in cases when it's not known if a page
491 * has an associated memory cgroup pointer or an object cgroups vector or
494 * For a non-kmem page any of the following ensures page and memcg binding
499 * - lock_page_memcg()
500 * - exclusive reference
502 * For a kmem page a caller should hold an rcu read lock to protect memcg
503 * associated with a kmem page from being released.
505 static inline struct mem_cgroup
*page_memcg_check(struct page
*page
)
508 * Because page->memcg_data might be changed asynchronously
509 * for slab pages, READ_ONCE() should be used here.
511 unsigned long memcg_data
= READ_ONCE(page
->memcg_data
);
513 if (memcg_data
& MEMCG_DATA_OBJCGS
)
516 if (memcg_data
& MEMCG_DATA_KMEM
) {
517 struct obj_cgroup
*objcg
;
519 objcg
= (void *)(memcg_data
& ~MEMCG_DATA_FLAGS_MASK
);
520 return obj_cgroup_memcg(objcg
);
523 return (struct mem_cgroup
*)(memcg_data
& ~MEMCG_DATA_FLAGS_MASK
);
526 #ifdef CONFIG_MEMCG_KMEM
528 * PageMemcgKmem - check if the page has MemcgKmem flag set
529 * @page: a pointer to the page struct
531 * Checks if the page has MemcgKmem flag set. The caller must ensure that
532 * the page has an associated memory cgroup. It's not safe to call this function
533 * against some types of pages, e.g. slab pages.
535 static inline bool PageMemcgKmem(struct page
*page
)
537 VM_BUG_ON_PAGE(page
->memcg_data
& MEMCG_DATA_OBJCGS
, page
);
538 return page
->memcg_data
& MEMCG_DATA_KMEM
;
542 * page_objcgs - get the object cgroups vector associated with a page
543 * @page: a pointer to the page struct
545 * Returns a pointer to the object cgroups vector associated with the page,
546 * or NULL. This function assumes that the page is known to have an
547 * associated object cgroups vector. It's not safe to call this function
548 * against pages, which might have an associated memory cgroup: e.g.
549 * kernel stack pages.
551 static inline struct obj_cgroup
**page_objcgs(struct page
*page
)
553 unsigned long memcg_data
= READ_ONCE(page
->memcg_data
);
555 VM_BUG_ON_PAGE(memcg_data
&& !(memcg_data
& MEMCG_DATA_OBJCGS
), page
);
556 VM_BUG_ON_PAGE(memcg_data
& MEMCG_DATA_KMEM
, page
);
558 return (struct obj_cgroup
**)(memcg_data
& ~MEMCG_DATA_FLAGS_MASK
);
562 * page_objcgs_check - get the object cgroups vector associated with a page
563 * @page: a pointer to the page struct
565 * Returns a pointer to the object cgroups vector associated with the page,
566 * or NULL. This function is safe to use if the page can be directly associated
567 * with a memory cgroup.
569 static inline struct obj_cgroup
**page_objcgs_check(struct page
*page
)
571 unsigned long memcg_data
= READ_ONCE(page
->memcg_data
);
573 if (!memcg_data
|| !(memcg_data
& MEMCG_DATA_OBJCGS
))
576 VM_BUG_ON_PAGE(memcg_data
& MEMCG_DATA_KMEM
, page
);
578 return (struct obj_cgroup
**)(memcg_data
& ~MEMCG_DATA_FLAGS_MASK
);
582 static inline bool PageMemcgKmem(struct page
*page
)
587 static inline struct obj_cgroup
**page_objcgs(struct page
*page
)
592 static inline struct obj_cgroup
**page_objcgs_check(struct page
*page
)
598 static __always_inline
bool memcg_stat_item_in_bytes(int idx
)
600 if (idx
== MEMCG_PERCPU_B
)
602 return vmstat_item_in_bytes(idx
);
605 static inline bool mem_cgroup_is_root(struct mem_cgroup
*memcg
)
607 return (memcg
== root_mem_cgroup
);
610 static inline bool mem_cgroup_disabled(void)
612 return !cgroup_subsys_enabled(memory_cgrp_subsys
);
615 static inline unsigned long mem_cgroup_protection(struct mem_cgroup
*root
,
616 struct mem_cgroup
*memcg
,
619 if (mem_cgroup_disabled())
623 * There is no reclaim protection applied to a targeted reclaim.
624 * We are special casing this specific case here because
625 * mem_cgroup_protected calculation is not robust enough to keep
626 * the protection invariant for calculated effective values for
627 * parallel reclaimers with different reclaim target. This is
628 * especially a problem for tail memcgs (as they have pages on LRU)
629 * which would want to have effective values 0 for targeted reclaim
630 * but a different value for external reclaim.
633 * Let's have global and A's reclaim in parallel:
635 * A (low=2G, usage = 3G, max = 3G, children_low_usage = 1.5G)
637 * | C (low = 1G, usage = 2.5G)
638 * B (low = 1G, usage = 0.5G)
640 * For the global reclaim
642 * B.elow = min(B.usage, B.low) because children_low_usage <= A.elow
643 * C.elow = min(C.usage, C.low)
645 * With the effective values resetting we have A reclaim
650 * If the global reclaim races with A's reclaim then
651 * B.elow = C.elow = 0 because children_low_usage > A.elow)
652 * is possible and reclaiming B would be violating the protection.
659 return READ_ONCE(memcg
->memory
.emin
);
661 return max(READ_ONCE(memcg
->memory
.emin
),
662 READ_ONCE(memcg
->memory
.elow
));
665 void mem_cgroup_calculate_protection(struct mem_cgroup
*root
,
666 struct mem_cgroup
*memcg
);
668 static inline bool mem_cgroup_supports_protection(struct mem_cgroup
*memcg
)
671 * The root memcg doesn't account charges, and doesn't support
674 return !mem_cgroup_disabled() && !mem_cgroup_is_root(memcg
);
678 static inline bool mem_cgroup_below_low(struct mem_cgroup
*memcg
)
680 if (!mem_cgroup_supports_protection(memcg
))
683 return READ_ONCE(memcg
->memory
.elow
) >=
684 page_counter_read(&memcg
->memory
);
687 static inline bool mem_cgroup_below_min(struct mem_cgroup
*memcg
)
689 if (!mem_cgroup_supports_protection(memcg
))
692 return READ_ONCE(memcg
->memory
.emin
) >=
693 page_counter_read(&memcg
->memory
);
696 int mem_cgroup_charge(struct page
*page
, struct mm_struct
*mm
, gfp_t gfp_mask
);
697 int mem_cgroup_swapin_charge_page(struct page
*page
, struct mm_struct
*mm
,
698 gfp_t gfp
, swp_entry_t entry
);
699 void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry
);
701 void mem_cgroup_uncharge(struct page
*page
);
702 void mem_cgroup_uncharge_list(struct list_head
*page_list
);
704 void mem_cgroup_migrate(struct page
*oldpage
, struct page
*newpage
);
707 * mem_cgroup_lruvec - get the lru list vector for a memcg & node
708 * @memcg: memcg of the wanted lruvec
709 * @pgdat: pglist_data
711 * Returns the lru list vector holding pages for a given @memcg &
712 * @pgdat combination. This can be the node lruvec, if the memory
713 * controller is disabled.
715 static inline struct lruvec
*mem_cgroup_lruvec(struct mem_cgroup
*memcg
,
716 struct pglist_data
*pgdat
)
718 struct mem_cgroup_per_node
*mz
;
719 struct lruvec
*lruvec
;
721 if (mem_cgroup_disabled()) {
722 lruvec
= &pgdat
->__lruvec
;
727 memcg
= root_mem_cgroup
;
729 mz
= memcg
->nodeinfo
[pgdat
->node_id
];
730 lruvec
= &mz
->lruvec
;
733 * Since a node can be onlined after the mem_cgroup was created,
734 * we have to be prepared to initialize lruvec->pgdat here;
735 * and if offlined then reonlined, we need to reinitialize it.
737 if (unlikely(lruvec
->pgdat
!= pgdat
))
738 lruvec
->pgdat
= pgdat
;
743 * mem_cgroup_page_lruvec - return lruvec for isolating/putting an LRU page
746 * This function relies on page->mem_cgroup being stable.
748 static inline struct lruvec
*mem_cgroup_page_lruvec(struct page
*page
)
750 pg_data_t
*pgdat
= page_pgdat(page
);
751 struct mem_cgroup
*memcg
= page_memcg(page
);
753 VM_WARN_ON_ONCE_PAGE(!memcg
&& !mem_cgroup_disabled(), page
);
754 return mem_cgroup_lruvec(memcg
, pgdat
);
757 struct mem_cgroup
*mem_cgroup_from_task(struct task_struct
*p
);
759 struct mem_cgroup
*get_mem_cgroup_from_mm(struct mm_struct
*mm
);
761 struct lruvec
*lock_page_lruvec(struct page
*page
);
762 struct lruvec
*lock_page_lruvec_irq(struct page
*page
);
763 struct lruvec
*lock_page_lruvec_irqsave(struct page
*page
,
764 unsigned long *flags
);
766 #ifdef CONFIG_DEBUG_VM
767 void lruvec_memcg_debug(struct lruvec
*lruvec
, struct page
*page
);
769 static inline void lruvec_memcg_debug(struct lruvec
*lruvec
, struct page
*page
)
775 struct mem_cgroup
*mem_cgroup_from_css(struct cgroup_subsys_state
*css
){
776 return css
? container_of(css
, struct mem_cgroup
, css
) : NULL
;
779 static inline bool obj_cgroup_tryget(struct obj_cgroup
*objcg
)
781 return percpu_ref_tryget(&objcg
->refcnt
);
784 static inline void obj_cgroup_get(struct obj_cgroup
*objcg
)
786 percpu_ref_get(&objcg
->refcnt
);
789 static inline void obj_cgroup_get_many(struct obj_cgroup
*objcg
,
792 percpu_ref_get_many(&objcg
->refcnt
, nr
);
795 static inline void obj_cgroup_put(struct obj_cgroup
*objcg
)
797 percpu_ref_put(&objcg
->refcnt
);
800 static inline void mem_cgroup_put(struct mem_cgroup
*memcg
)
803 css_put(&memcg
->css
);
806 #define mem_cgroup_from_counter(counter, member) \
807 container_of(counter, struct mem_cgroup, member)
809 struct mem_cgroup
*mem_cgroup_iter(struct mem_cgroup
*,
811 struct mem_cgroup_reclaim_cookie
*);
812 void mem_cgroup_iter_break(struct mem_cgroup
*, struct mem_cgroup
*);
813 int mem_cgroup_scan_tasks(struct mem_cgroup
*,
814 int (*)(struct task_struct
*, void *), void *);
816 static inline unsigned short mem_cgroup_id(struct mem_cgroup
*memcg
)
818 if (mem_cgroup_disabled())
823 struct mem_cgroup
*mem_cgroup_from_id(unsigned short id
);
825 static inline struct mem_cgroup
*mem_cgroup_from_seq(struct seq_file
*m
)
827 return mem_cgroup_from_css(seq_css(m
));
830 static inline struct mem_cgroup
*lruvec_memcg(struct lruvec
*lruvec
)
832 struct mem_cgroup_per_node
*mz
;
834 if (mem_cgroup_disabled())
837 mz
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
842 * parent_mem_cgroup - find the accounting parent of a memcg
843 * @memcg: memcg whose parent to find
845 * Returns the parent memcg, or NULL if this is the root or the memory
846 * controller is in legacy no-hierarchy mode.
848 static inline struct mem_cgroup
*parent_mem_cgroup(struct mem_cgroup
*memcg
)
850 if (!memcg
->memory
.parent
)
852 return mem_cgroup_from_counter(memcg
->memory
.parent
, memory
);
855 static inline bool mem_cgroup_is_descendant(struct mem_cgroup
*memcg
,
856 struct mem_cgroup
*root
)
860 return cgroup_is_descendant(memcg
->css
.cgroup
, root
->css
.cgroup
);
863 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
864 struct mem_cgroup
*memcg
)
866 struct mem_cgroup
*task_memcg
;
870 task_memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
872 match
= mem_cgroup_is_descendant(task_memcg
, memcg
);
877 struct cgroup_subsys_state
*mem_cgroup_css_from_page(struct page
*page
);
878 ino_t
page_cgroup_ino(struct page
*page
);
880 static inline bool mem_cgroup_online(struct mem_cgroup
*memcg
)
882 if (mem_cgroup_disabled())
884 return !!(memcg
->css
.flags
& CSS_ONLINE
);
888 * For memory reclaim.
890 int mem_cgroup_select_victim_node(struct mem_cgroup
*memcg
);
892 void mem_cgroup_update_lru_size(struct lruvec
*lruvec
, enum lru_list lru
,
893 int zid
, int nr_pages
);
896 unsigned long mem_cgroup_get_zone_lru_size(struct lruvec
*lruvec
,
897 enum lru_list lru
, int zone_idx
)
899 struct mem_cgroup_per_node
*mz
;
901 mz
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
902 return READ_ONCE(mz
->lru_zone_size
[zone_idx
][lru
]);
905 void mem_cgroup_handle_over_high(void);
907 unsigned long mem_cgroup_get_max(struct mem_cgroup
*memcg
);
909 unsigned long mem_cgroup_size(struct mem_cgroup
*memcg
);
911 void mem_cgroup_print_oom_context(struct mem_cgroup
*memcg
,
912 struct task_struct
*p
);
914 void mem_cgroup_print_oom_meminfo(struct mem_cgroup
*memcg
);
916 static inline void mem_cgroup_enter_user_fault(void)
918 WARN_ON(current
->in_user_fault
);
919 current
->in_user_fault
= 1;
922 static inline void mem_cgroup_exit_user_fault(void)
924 WARN_ON(!current
->in_user_fault
);
925 current
->in_user_fault
= 0;
928 static inline bool task_in_memcg_oom(struct task_struct
*p
)
930 return p
->memcg_in_oom
;
933 bool mem_cgroup_oom_synchronize(bool wait
);
934 struct mem_cgroup
*mem_cgroup_get_oom_group(struct task_struct
*victim
,
935 struct mem_cgroup
*oom_domain
);
936 void mem_cgroup_print_oom_group(struct mem_cgroup
*memcg
);
938 #ifdef CONFIG_MEMCG_SWAP
939 extern bool cgroup_memory_noswap
;
942 void lock_page_memcg(struct page
*page
);
943 void unlock_page_memcg(struct page
*page
);
945 void __mod_memcg_state(struct mem_cgroup
*memcg
, int idx
, int val
);
947 /* idx can be of type enum memcg_stat_item or node_stat_item */
948 static inline void mod_memcg_state(struct mem_cgroup
*memcg
,
953 local_irq_save(flags
);
954 __mod_memcg_state(memcg
, idx
, val
);
955 local_irq_restore(flags
);
958 static inline unsigned long lruvec_page_state(struct lruvec
*lruvec
,
959 enum node_stat_item idx
)
961 struct mem_cgroup_per_node
*pn
;
964 if (mem_cgroup_disabled())
965 return node_page_state(lruvec_pgdat(lruvec
), idx
);
967 pn
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
968 x
= atomic_long_read(&pn
->lruvec_stat
[idx
]);
976 static inline unsigned long lruvec_page_state_local(struct lruvec
*lruvec
,
977 enum node_stat_item idx
)
979 struct mem_cgroup_per_node
*pn
;
983 if (mem_cgroup_disabled())
984 return node_page_state(lruvec_pgdat(lruvec
), idx
);
986 pn
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
987 for_each_possible_cpu(cpu
)
988 x
+= per_cpu(pn
->lruvec_stat_local
->count
[idx
], cpu
);
996 void __mod_memcg_lruvec_state(struct lruvec
*lruvec
, enum node_stat_item idx
,
998 void __mod_lruvec_kmem_state(void *p
, enum node_stat_item idx
, int val
);
1000 static inline void mod_lruvec_kmem_state(void *p
, enum node_stat_item idx
,
1003 unsigned long flags
;
1005 local_irq_save(flags
);
1006 __mod_lruvec_kmem_state(p
, idx
, val
);
1007 local_irq_restore(flags
);
1010 static inline void mod_memcg_lruvec_state(struct lruvec
*lruvec
,
1011 enum node_stat_item idx
, int val
)
1013 unsigned long flags
;
1015 local_irq_save(flags
);
1016 __mod_memcg_lruvec_state(lruvec
, idx
, val
);
1017 local_irq_restore(flags
);
1020 void __count_memcg_events(struct mem_cgroup
*memcg
, enum vm_event_item idx
,
1021 unsigned long count
);
1023 static inline void count_memcg_events(struct mem_cgroup
*memcg
,
1024 enum vm_event_item idx
,
1025 unsigned long count
)
1027 unsigned long flags
;
1029 local_irq_save(flags
);
1030 __count_memcg_events(memcg
, idx
, count
);
1031 local_irq_restore(flags
);
1034 static inline void count_memcg_page_event(struct page
*page
,
1035 enum vm_event_item idx
)
1037 struct mem_cgroup
*memcg
= page_memcg(page
);
1040 count_memcg_events(memcg
, idx
, 1);
1043 static inline void count_memcg_event_mm(struct mm_struct
*mm
,
1044 enum vm_event_item idx
)
1046 struct mem_cgroup
*memcg
;
1048 if (mem_cgroup_disabled())
1052 memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
1054 count_memcg_events(memcg
, idx
, 1);
1058 static inline void memcg_memory_event(struct mem_cgroup
*memcg
,
1059 enum memcg_memory_event event
)
1061 bool swap_event
= event
== MEMCG_SWAP_HIGH
|| event
== MEMCG_SWAP_MAX
||
1062 event
== MEMCG_SWAP_FAIL
;
1064 atomic_long_inc(&memcg
->memory_events_local
[event
]);
1066 cgroup_file_notify(&memcg
->events_local_file
);
1069 atomic_long_inc(&memcg
->memory_events
[event
]);
1071 cgroup_file_notify(&memcg
->swap_events_file
);
1073 cgroup_file_notify(&memcg
->events_file
);
1075 if (!cgroup_subsys_on_dfl(memory_cgrp_subsys
))
1077 if (cgrp_dfl_root
.flags
& CGRP_ROOT_MEMORY_LOCAL_EVENTS
)
1079 } while ((memcg
= parent_mem_cgroup(memcg
)) &&
1080 !mem_cgroup_is_root(memcg
));
1083 static inline void memcg_memory_event_mm(struct mm_struct
*mm
,
1084 enum memcg_memory_event event
)
1086 struct mem_cgroup
*memcg
;
1088 if (mem_cgroup_disabled())
1092 memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
1094 memcg_memory_event(memcg
, event
);
1098 void split_page_memcg(struct page
*head
, unsigned int nr
);
1100 unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t
*pgdat
, int order
,
1102 unsigned long *total_scanned
);
1104 #else /* CONFIG_MEMCG */
1106 #define MEM_CGROUP_ID_SHIFT 0
1107 #define MEM_CGROUP_ID_MAX 0
1109 static inline struct mem_cgroup
*page_memcg(struct page
*page
)
1114 static inline struct mem_cgroup
*page_memcg_rcu(struct page
*page
)
1116 WARN_ON_ONCE(!rcu_read_lock_held());
1120 static inline struct mem_cgroup
*page_memcg_check(struct page
*page
)
1125 static inline bool PageMemcgKmem(struct page
*page
)
1130 static inline bool mem_cgroup_is_root(struct mem_cgroup
*memcg
)
1135 static inline bool mem_cgroup_disabled(void)
1140 static inline void memcg_memory_event(struct mem_cgroup
*memcg
,
1141 enum memcg_memory_event event
)
1145 static inline void memcg_memory_event_mm(struct mm_struct
*mm
,
1146 enum memcg_memory_event event
)
1150 static inline unsigned long mem_cgroup_protection(struct mem_cgroup
*root
,
1151 struct mem_cgroup
*memcg
,
1152 bool in_low_reclaim
)
1157 static inline void mem_cgroup_calculate_protection(struct mem_cgroup
*root
,
1158 struct mem_cgroup
*memcg
)
1162 static inline bool mem_cgroup_below_low(struct mem_cgroup
*memcg
)
1167 static inline bool mem_cgroup_below_min(struct mem_cgroup
*memcg
)
1172 static inline int mem_cgroup_charge(struct page
*page
, struct mm_struct
*mm
,
1178 static inline int mem_cgroup_swapin_charge_page(struct page
*page
,
1179 struct mm_struct
*mm
, gfp_t gfp
, swp_entry_t entry
)
1184 static inline void mem_cgroup_swapin_uncharge_swap(swp_entry_t entry
)
1188 static inline void mem_cgroup_uncharge(struct page
*page
)
1192 static inline void mem_cgroup_uncharge_list(struct list_head
*page_list
)
1196 static inline void mem_cgroup_migrate(struct page
*old
, struct page
*new)
1200 static inline struct lruvec
*mem_cgroup_lruvec(struct mem_cgroup
*memcg
,
1201 struct pglist_data
*pgdat
)
1203 return &pgdat
->__lruvec
;
1206 static inline struct lruvec
*mem_cgroup_page_lruvec(struct page
*page
)
1208 pg_data_t
*pgdat
= page_pgdat(page
);
1210 return &pgdat
->__lruvec
;
1213 static inline void lruvec_memcg_debug(struct lruvec
*lruvec
, struct page
*page
)
1217 static inline struct mem_cgroup
*parent_mem_cgroup(struct mem_cgroup
*memcg
)
1222 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
1223 struct mem_cgroup
*memcg
)
1228 static inline struct mem_cgroup
*get_mem_cgroup_from_mm(struct mm_struct
*mm
)
1234 struct mem_cgroup
*mem_cgroup_from_css(struct cgroup_subsys_state
*css
)
1239 static inline void mem_cgroup_put(struct mem_cgroup
*memcg
)
1243 static inline struct lruvec
*lock_page_lruvec(struct page
*page
)
1245 struct pglist_data
*pgdat
= page_pgdat(page
);
1247 spin_lock(&pgdat
->__lruvec
.lru_lock
);
1248 return &pgdat
->__lruvec
;
1251 static inline struct lruvec
*lock_page_lruvec_irq(struct page
*page
)
1253 struct pglist_data
*pgdat
= page_pgdat(page
);
1255 spin_lock_irq(&pgdat
->__lruvec
.lru_lock
);
1256 return &pgdat
->__lruvec
;
1259 static inline struct lruvec
*lock_page_lruvec_irqsave(struct page
*page
,
1260 unsigned long *flagsp
)
1262 struct pglist_data
*pgdat
= page_pgdat(page
);
1264 spin_lock_irqsave(&pgdat
->__lruvec
.lru_lock
, *flagsp
);
1265 return &pgdat
->__lruvec
;
1268 static inline struct mem_cgroup
*
1269 mem_cgroup_iter(struct mem_cgroup
*root
,
1270 struct mem_cgroup
*prev
,
1271 struct mem_cgroup_reclaim_cookie
*reclaim
)
1276 static inline void mem_cgroup_iter_break(struct mem_cgroup
*root
,
1277 struct mem_cgroup
*prev
)
1281 static inline int mem_cgroup_scan_tasks(struct mem_cgroup
*memcg
,
1282 int (*fn
)(struct task_struct
*, void *), void *arg
)
1287 static inline unsigned short mem_cgroup_id(struct mem_cgroup
*memcg
)
1292 static inline struct mem_cgroup
*mem_cgroup_from_id(unsigned short id
)
1295 /* XXX: This should always return root_mem_cgroup */
1299 static inline struct mem_cgroup
*mem_cgroup_from_seq(struct seq_file
*m
)
1304 static inline struct mem_cgroup
*lruvec_memcg(struct lruvec
*lruvec
)
1309 static inline bool mem_cgroup_online(struct mem_cgroup
*memcg
)
1315 unsigned long mem_cgroup_get_zone_lru_size(struct lruvec
*lruvec
,
1316 enum lru_list lru
, int zone_idx
)
1321 static inline unsigned long mem_cgroup_get_max(struct mem_cgroup
*memcg
)
1326 static inline unsigned long mem_cgroup_size(struct mem_cgroup
*memcg
)
1332 mem_cgroup_print_oom_context(struct mem_cgroup
*memcg
, struct task_struct
*p
)
1337 mem_cgroup_print_oom_meminfo(struct mem_cgroup
*memcg
)
1341 static inline void lock_page_memcg(struct page
*page
)
1345 static inline void unlock_page_memcg(struct page
*page
)
1349 static inline void mem_cgroup_handle_over_high(void)
1353 static inline void mem_cgroup_enter_user_fault(void)
1357 static inline void mem_cgroup_exit_user_fault(void)
1361 static inline bool task_in_memcg_oom(struct task_struct
*p
)
1366 static inline bool mem_cgroup_oom_synchronize(bool wait
)
1371 static inline struct mem_cgroup
*mem_cgroup_get_oom_group(
1372 struct task_struct
*victim
, struct mem_cgroup
*oom_domain
)
1377 static inline void mem_cgroup_print_oom_group(struct mem_cgroup
*memcg
)
1381 static inline void __mod_memcg_state(struct mem_cgroup
*memcg
,
1387 static inline void mod_memcg_state(struct mem_cgroup
*memcg
,
1393 static inline unsigned long lruvec_page_state(struct lruvec
*lruvec
,
1394 enum node_stat_item idx
)
1396 return node_page_state(lruvec_pgdat(lruvec
), idx
);
1399 static inline unsigned long lruvec_page_state_local(struct lruvec
*lruvec
,
1400 enum node_stat_item idx
)
1402 return node_page_state(lruvec_pgdat(lruvec
), idx
);
1405 static inline void __mod_memcg_lruvec_state(struct lruvec
*lruvec
,
1406 enum node_stat_item idx
, int val
)
1410 static inline void __mod_lruvec_kmem_state(void *p
, enum node_stat_item idx
,
1413 struct page
*page
= virt_to_head_page(p
);
1415 __mod_node_page_state(page_pgdat(page
), idx
, val
);
1418 static inline void mod_lruvec_kmem_state(void *p
, enum node_stat_item idx
,
1421 struct page
*page
= virt_to_head_page(p
);
1423 mod_node_page_state(page_pgdat(page
), idx
, val
);
1426 static inline void count_memcg_events(struct mem_cgroup
*memcg
,
1427 enum vm_event_item idx
,
1428 unsigned long count
)
1432 static inline void __count_memcg_events(struct mem_cgroup
*memcg
,
1433 enum vm_event_item idx
,
1434 unsigned long count
)
1438 static inline void count_memcg_page_event(struct page
*page
,
1444 void count_memcg_event_mm(struct mm_struct
*mm
, enum vm_event_item idx
)
1448 static inline void split_page_memcg(struct page
*head
, unsigned int nr
)
1453 unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t
*pgdat
, int order
,
1455 unsigned long *total_scanned
)
1459 #endif /* CONFIG_MEMCG */
1461 static inline void __inc_lruvec_kmem_state(void *p
, enum node_stat_item idx
)
1463 __mod_lruvec_kmem_state(p
, idx
, 1);
1466 static inline void __dec_lruvec_kmem_state(void *p
, enum node_stat_item idx
)
1468 __mod_lruvec_kmem_state(p
, idx
, -1);
1471 static inline struct lruvec
*parent_lruvec(struct lruvec
*lruvec
)
1473 struct mem_cgroup
*memcg
;
1475 memcg
= lruvec_memcg(lruvec
);
1478 memcg
= parent_mem_cgroup(memcg
);
1481 return mem_cgroup_lruvec(memcg
, lruvec_pgdat(lruvec
));
1484 static inline void unlock_page_lruvec(struct lruvec
*lruvec
)
1486 spin_unlock(&lruvec
->lru_lock
);
1489 static inline void unlock_page_lruvec_irq(struct lruvec
*lruvec
)
1491 spin_unlock_irq(&lruvec
->lru_lock
);
1494 static inline void unlock_page_lruvec_irqrestore(struct lruvec
*lruvec
,
1495 unsigned long flags
)
1497 spin_unlock_irqrestore(&lruvec
->lru_lock
, flags
);
1500 /* Test requires a stable page->memcg binding, see page_memcg() */
1501 static inline bool page_matches_lruvec(struct page
*page
, struct lruvec
*lruvec
)
1503 return lruvec_pgdat(lruvec
) == page_pgdat(page
) &&
1504 lruvec_memcg(lruvec
) == page_memcg(page
);
1507 /* Don't lock again iff page's lruvec locked */
1508 static inline struct lruvec
*relock_page_lruvec_irq(struct page
*page
,
1509 struct lruvec
*locked_lruvec
)
1511 if (locked_lruvec
) {
1512 if (page_matches_lruvec(page
, locked_lruvec
))
1513 return locked_lruvec
;
1515 unlock_page_lruvec_irq(locked_lruvec
);
1518 return lock_page_lruvec_irq(page
);
1521 /* Don't lock again iff page's lruvec locked */
1522 static inline struct lruvec
*relock_page_lruvec_irqsave(struct page
*page
,
1523 struct lruvec
*locked_lruvec
, unsigned long *flags
)
1525 if (locked_lruvec
) {
1526 if (page_matches_lruvec(page
, locked_lruvec
))
1527 return locked_lruvec
;
1529 unlock_page_lruvec_irqrestore(locked_lruvec
, *flags
);
1532 return lock_page_lruvec_irqsave(page
, flags
);
1535 #ifdef CONFIG_CGROUP_WRITEBACK
1537 struct wb_domain
*mem_cgroup_wb_domain(struct bdi_writeback
*wb
);
1538 void mem_cgroup_wb_stats(struct bdi_writeback
*wb
, unsigned long *pfilepages
,
1539 unsigned long *pheadroom
, unsigned long *pdirty
,
1540 unsigned long *pwriteback
);
1542 void mem_cgroup_track_foreign_dirty_slowpath(struct page
*page
,
1543 struct bdi_writeback
*wb
);
1545 static inline void mem_cgroup_track_foreign_dirty(struct page
*page
,
1546 struct bdi_writeback
*wb
)
1548 if (mem_cgroup_disabled())
1551 if (unlikely(&page_memcg(page
)->css
!= wb
->memcg_css
))
1552 mem_cgroup_track_foreign_dirty_slowpath(page
, wb
);
1555 void mem_cgroup_flush_foreign(struct bdi_writeback
*wb
);
1557 #else /* CONFIG_CGROUP_WRITEBACK */
1559 static inline struct wb_domain
*mem_cgroup_wb_domain(struct bdi_writeback
*wb
)
1564 static inline void mem_cgroup_wb_stats(struct bdi_writeback
*wb
,
1565 unsigned long *pfilepages
,
1566 unsigned long *pheadroom
,
1567 unsigned long *pdirty
,
1568 unsigned long *pwriteback
)
1572 static inline void mem_cgroup_track_foreign_dirty(struct page
*page
,
1573 struct bdi_writeback
*wb
)
1577 static inline void mem_cgroup_flush_foreign(struct bdi_writeback
*wb
)
1581 #endif /* CONFIG_CGROUP_WRITEBACK */
1584 bool mem_cgroup_charge_skmem(struct mem_cgroup
*memcg
, unsigned int nr_pages
);
1585 void mem_cgroup_uncharge_skmem(struct mem_cgroup
*memcg
, unsigned int nr_pages
);
1587 extern struct static_key_false memcg_sockets_enabled_key
;
1588 #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key)
1589 void mem_cgroup_sk_alloc(struct sock
*sk
);
1590 void mem_cgroup_sk_free(struct sock
*sk
);
1591 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup
*memcg
)
1593 if (!cgroup_subsys_on_dfl(memory_cgrp_subsys
) && memcg
->tcpmem_pressure
)
1596 if (time_before(jiffies
, memcg
->socket_pressure
))
1598 } while ((memcg
= parent_mem_cgroup(memcg
)));
1602 int alloc_shrinker_info(struct mem_cgroup
*memcg
);
1603 void free_shrinker_info(struct mem_cgroup
*memcg
);
1604 void set_shrinker_bit(struct mem_cgroup
*memcg
, int nid
, int shrinker_id
);
1605 void reparent_shrinker_deferred(struct mem_cgroup
*memcg
);
1607 #define mem_cgroup_sockets_enabled 0
1608 static inline void mem_cgroup_sk_alloc(struct sock
*sk
) { };
1609 static inline void mem_cgroup_sk_free(struct sock
*sk
) { };
1610 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup
*memcg
)
1615 static inline void set_shrinker_bit(struct mem_cgroup
*memcg
,
1616 int nid
, int shrinker_id
)
1621 #ifdef CONFIG_MEMCG_KMEM
1622 bool mem_cgroup_kmem_disabled(void);
1623 int __memcg_kmem_charge_page(struct page
*page
, gfp_t gfp
, int order
);
1624 void __memcg_kmem_uncharge_page(struct page
*page
, int order
);
1626 struct obj_cgroup
*get_obj_cgroup_from_current(void);
1628 int obj_cgroup_charge(struct obj_cgroup
*objcg
, gfp_t gfp
, size_t size
);
1629 void obj_cgroup_uncharge(struct obj_cgroup
*objcg
, size_t size
);
1631 extern struct static_key_false memcg_kmem_enabled_key
;
1633 extern int memcg_nr_cache_ids
;
1634 void memcg_get_cache_ids(void);
1635 void memcg_put_cache_ids(void);
1638 * Helper macro to loop through all memcg-specific caches. Callers must still
1639 * check if the cache is valid (it is either valid or NULL).
1640 * the slab_mutex must be held when looping through those caches
1642 #define for_each_memcg_cache_index(_idx) \
1643 for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++)
1645 static inline bool memcg_kmem_enabled(void)
1647 return static_branch_likely(&memcg_kmem_enabled_key
);
1650 static inline int memcg_kmem_charge_page(struct page
*page
, gfp_t gfp
,
1653 if (memcg_kmem_enabled())
1654 return __memcg_kmem_charge_page(page
, gfp
, order
);
1658 static inline void memcg_kmem_uncharge_page(struct page
*page
, int order
)
1660 if (memcg_kmem_enabled())
1661 __memcg_kmem_uncharge_page(page
, order
);
1665 * A helper for accessing memcg's kmem_id, used for getting
1666 * corresponding LRU lists.
1668 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
1670 return memcg
? memcg
->kmemcg_id
: -1;
1673 struct mem_cgroup
*mem_cgroup_from_obj(void *p
);
1676 static inline bool mem_cgroup_kmem_disabled(void)
1681 static inline int memcg_kmem_charge_page(struct page
*page
, gfp_t gfp
,
1687 static inline void memcg_kmem_uncharge_page(struct page
*page
, int order
)
1691 static inline int __memcg_kmem_charge_page(struct page
*page
, gfp_t gfp
,
1697 static inline void __memcg_kmem_uncharge_page(struct page
*page
, int order
)
1701 #define for_each_memcg_cache_index(_idx) \
1704 static inline bool memcg_kmem_enabled(void)
1709 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
1714 static inline void memcg_get_cache_ids(void)
1718 static inline void memcg_put_cache_ids(void)
1722 static inline struct mem_cgroup
*mem_cgroup_from_obj(void *p
)
1727 #endif /* CONFIG_MEMCG_KMEM */
1729 #endif /* _LINUX_MEMCONTROL_H */