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>
30 /* Cgroup-specific page state, on top of universal node page state */
31 enum memcg_stat_item
{
32 MEMCG_CACHE
= NR_VM_NODE_STAT_ITEMS
,
37 /* XXX: why are these zone and not node counters? */
38 MEMCG_KERNEL_STACK_KB
,
42 enum memcg_memory_event
{
50 MEMCG_NR_MEMORY_EVENTS
,
53 enum mem_cgroup_protection
{
59 struct mem_cgroup_reclaim_cookie
{
62 unsigned int generation
;
67 #define MEM_CGROUP_ID_SHIFT 16
68 #define MEM_CGROUP_ID_MAX USHRT_MAX
70 struct mem_cgroup_id
{
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
,
88 struct memcg_vmstats_percpu
{
89 long stat
[MEMCG_NR_STAT
];
90 unsigned long events
[NR_VM_EVENT_ITEMS
];
91 unsigned long nr_page_events
;
92 unsigned long targets
[MEM_CGROUP_NTARGETS
];
95 struct mem_cgroup_reclaim_iter
{
96 struct mem_cgroup
*position
;
97 /* scan generation, increased every round-trip */
98 unsigned int generation
;
102 long count
[NR_VM_NODE_STAT_ITEMS
];
106 * Bitmap of shrinker::id corresponding to memcg-aware shrinkers,
107 * which have elements charged to this memcg.
109 struct memcg_shrinker_map
{
111 unsigned long map
[0];
115 * per-zone information in memory controller.
117 struct mem_cgroup_per_node
{
118 struct lruvec lruvec
;
120 /* Legacy local VM stats */
121 struct lruvec_stat __percpu
*lruvec_stat_local
;
123 /* Subtree VM stats (batched updates) */
124 struct lruvec_stat __percpu
*lruvec_stat_cpu
;
125 atomic_long_t lruvec_stat
[NR_VM_NODE_STAT_ITEMS
];
127 unsigned long lru_zone_size
[MAX_NR_ZONES
][NR_LRU_LISTS
];
129 struct mem_cgroup_reclaim_iter iter
[DEF_PRIORITY
+ 1];
131 #ifdef CONFIG_MEMCG_KMEM
132 struct memcg_shrinker_map __rcu
*shrinker_map
;
134 struct rb_node tree_node
; /* RB tree node */
135 unsigned long usage_in_excess
;/* Set to the value by which */
136 /* the soft limit is exceeded*/
138 bool congested
; /* memcg has many dirty pages */
139 /* backed by a congested BDI */
141 struct mem_cgroup
*memcg
; /* Back pointer, we cannot */
142 /* use container_of */
145 struct mem_cgroup_threshold
{
146 struct eventfd_ctx
*eventfd
;
147 unsigned long threshold
;
151 struct mem_cgroup_threshold_ary
{
152 /* An array index points to threshold just below or equal to usage. */
153 int current_threshold
;
154 /* Size of entries[] */
156 /* Array of thresholds */
157 struct mem_cgroup_threshold entries
[0];
160 struct mem_cgroup_thresholds
{
161 /* Primary thresholds array */
162 struct mem_cgroup_threshold_ary
*primary
;
164 * Spare threshold array.
165 * This is needed to make mem_cgroup_unregister_event() "never fail".
166 * It must be able to store at least primary->size - 1 entries.
168 struct mem_cgroup_threshold_ary
*spare
;
171 enum memcg_kmem_state
{
177 #if defined(CONFIG_SMP)
178 struct memcg_padding
{
180 } ____cacheline_internodealigned_in_smp
;
181 #define MEMCG_PADDING(name) struct memcg_padding name;
183 #define MEMCG_PADDING(name)
187 * The memory controller data structure. The memory controller controls both
188 * page cache and RSS per cgroup. We would eventually like to provide
189 * statistics based on the statistics developed by Rik Van Riel for clock-pro,
190 * to help the administrator determine what knobs to tune.
193 struct cgroup_subsys_state css
;
195 /* Private memcg ID. Used to ID objects that outlive the cgroup */
196 struct mem_cgroup_id id
;
198 /* Accounted resources */
199 struct page_counter memory
;
200 struct page_counter swap
;
202 /* Legacy consumer-oriented counters */
203 struct page_counter memsw
;
204 struct page_counter kmem
;
205 struct page_counter tcpmem
;
207 /* Upper bound of normal memory consumption range */
210 /* Range enforcement for interrupt charges */
211 struct work_struct high_work
;
213 unsigned long soft_limit
;
215 /* vmpressure notifications */
216 struct vmpressure vmpressure
;
219 * Should the accounting and control be hierarchical, per subtree?
224 * Should the OOM killer kill all belonging tasks, had it kill one?
228 /* protected by memcg_oom_lock */
233 /* OOM-Killer disable */
234 int oom_kill_disable
;
237 struct cgroup_file events_file
;
239 /* handle for "memory.swap.events" */
240 struct cgroup_file swap_events_file
;
242 /* protect arrays of thresholds */
243 struct mutex thresholds_lock
;
245 /* thresholds for memory usage. RCU-protected */
246 struct mem_cgroup_thresholds thresholds
;
248 /* thresholds for mem+swap usage. RCU-protected */
249 struct mem_cgroup_thresholds memsw_thresholds
;
251 /* For oom notifier event fd */
252 struct list_head oom_notify
;
255 * Should we move charges of a task when a task is moved into this
256 * mem_cgroup ? And what type of charges should we move ?
258 unsigned long move_charge_at_immigrate
;
259 /* taken only while moving_account > 0 */
260 spinlock_t move_lock
;
261 unsigned long move_lock_flags
;
263 MEMCG_PADDING(_pad1_
);
266 * set > 0 if pages under this cgroup are moving to other cgroup.
268 atomic_t moving_account
;
269 struct task_struct
*move_lock_task
;
271 /* Legacy local VM stats and events */
272 struct memcg_vmstats_percpu __percpu
*vmstats_local
;
274 /* Subtree VM stats and events (batched updates) */
275 struct memcg_vmstats_percpu __percpu
*vmstats_percpu
;
277 MEMCG_PADDING(_pad2_
);
279 atomic_long_t vmstats
[MEMCG_NR_STAT
];
280 atomic_long_t vmevents
[NR_VM_EVENT_ITEMS
];
283 atomic_long_t memory_events
[MEMCG_NR_MEMORY_EVENTS
];
285 unsigned long socket_pressure
;
287 /* Legacy tcp memory accounting */
291 #ifdef CONFIG_MEMCG_KMEM
292 /* Index in the kmem_cache->memcg_params.memcg_caches array */
294 enum memcg_kmem_state kmem_state
;
295 struct list_head kmem_caches
;
298 int last_scanned_node
;
300 nodemask_t scan_nodes
;
301 atomic_t numainfo_events
;
302 atomic_t numainfo_updating
;
305 #ifdef CONFIG_CGROUP_WRITEBACK
306 struct list_head cgwb_list
;
307 struct wb_domain cgwb_domain
;
310 /* List of events which userspace want to receive */
311 struct list_head event_list
;
312 spinlock_t event_list_lock
;
314 struct mem_cgroup_per_node
*nodeinfo
[0];
315 /* WARNING: nodeinfo must be the last member here */
319 * size of first charge trial. "32" comes from vmscan.c's magic value.
320 * TODO: maybe necessary to use big numbers in big irons.
322 #define MEMCG_CHARGE_BATCH 32U
324 extern struct mem_cgroup
*root_mem_cgroup
;
326 static inline bool mem_cgroup_is_root(struct mem_cgroup
*memcg
)
328 return (memcg
== root_mem_cgroup
);
331 static inline bool mem_cgroup_disabled(void)
333 return !cgroup_subsys_enabled(memory_cgrp_subsys
);
336 enum mem_cgroup_protection
mem_cgroup_protected(struct mem_cgroup
*root
,
337 struct mem_cgroup
*memcg
);
339 int mem_cgroup_try_charge(struct page
*page
, struct mm_struct
*mm
,
340 gfp_t gfp_mask
, struct mem_cgroup
**memcgp
,
342 int mem_cgroup_try_charge_delay(struct page
*page
, struct mm_struct
*mm
,
343 gfp_t gfp_mask
, struct mem_cgroup
**memcgp
,
345 void mem_cgroup_commit_charge(struct page
*page
, struct mem_cgroup
*memcg
,
346 bool lrucare
, bool compound
);
347 void mem_cgroup_cancel_charge(struct page
*page
, struct mem_cgroup
*memcg
,
349 void mem_cgroup_uncharge(struct page
*page
);
350 void mem_cgroup_uncharge_list(struct list_head
*page_list
);
352 void mem_cgroup_migrate(struct page
*oldpage
, struct page
*newpage
);
354 static struct mem_cgroup_per_node
*
355 mem_cgroup_nodeinfo(struct mem_cgroup
*memcg
, int nid
)
357 return memcg
->nodeinfo
[nid
];
361 * mem_cgroup_lruvec - get the lru list vector for a node or a memcg zone
362 * @node: node of the wanted lruvec
363 * @memcg: memcg of the wanted lruvec
365 * Returns the lru list vector holding pages for a given @node or a given
366 * @memcg and @zone. This can be the node lruvec, if the memory controller
369 static inline struct lruvec
*mem_cgroup_lruvec(struct pglist_data
*pgdat
,
370 struct mem_cgroup
*memcg
)
372 struct mem_cgroup_per_node
*mz
;
373 struct lruvec
*lruvec
;
375 if (mem_cgroup_disabled()) {
376 lruvec
= node_lruvec(pgdat
);
380 mz
= mem_cgroup_nodeinfo(memcg
, pgdat
->node_id
);
381 lruvec
= &mz
->lruvec
;
384 * Since a node can be onlined after the mem_cgroup was created,
385 * we have to be prepared to initialize lruvec->pgdat here;
386 * and if offlined then reonlined, we need to reinitialize it.
388 if (unlikely(lruvec
->pgdat
!= pgdat
))
389 lruvec
->pgdat
= pgdat
;
393 struct lruvec
*mem_cgroup_page_lruvec(struct page
*, struct pglist_data
*);
395 bool task_in_mem_cgroup(struct task_struct
*task
, struct mem_cgroup
*memcg
);
396 struct mem_cgroup
*mem_cgroup_from_task(struct task_struct
*p
);
398 struct mem_cgroup
*get_mem_cgroup_from_mm(struct mm_struct
*mm
);
400 struct mem_cgroup
*get_mem_cgroup_from_page(struct page
*page
);
403 struct mem_cgroup
*mem_cgroup_from_css(struct cgroup_subsys_state
*css
){
404 return css
? container_of(css
, struct mem_cgroup
, css
) : NULL
;
407 static inline void mem_cgroup_put(struct mem_cgroup
*memcg
)
410 css_put(&memcg
->css
);
413 #define mem_cgroup_from_counter(counter, member) \
414 container_of(counter, struct mem_cgroup, member)
416 struct mem_cgroup
*mem_cgroup_iter(struct mem_cgroup
*,
418 struct mem_cgroup_reclaim_cookie
*);
419 void mem_cgroup_iter_break(struct mem_cgroup
*, struct mem_cgroup
*);
420 int mem_cgroup_scan_tasks(struct mem_cgroup
*,
421 int (*)(struct task_struct
*, void *), void *);
423 static inline unsigned short mem_cgroup_id(struct mem_cgroup
*memcg
)
425 if (mem_cgroup_disabled())
430 struct mem_cgroup
*mem_cgroup_from_id(unsigned short id
);
432 static inline struct mem_cgroup
*mem_cgroup_from_seq(struct seq_file
*m
)
434 return mem_cgroup_from_css(seq_css(m
));
437 static inline struct mem_cgroup
*lruvec_memcg(struct lruvec
*lruvec
)
439 struct mem_cgroup_per_node
*mz
;
441 if (mem_cgroup_disabled())
444 mz
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
449 * parent_mem_cgroup - find the accounting parent of a memcg
450 * @memcg: memcg whose parent to find
452 * Returns the parent memcg, or NULL if this is the root or the memory
453 * controller is in legacy no-hierarchy mode.
455 static inline struct mem_cgroup
*parent_mem_cgroup(struct mem_cgroup
*memcg
)
457 if (!memcg
->memory
.parent
)
459 return mem_cgroup_from_counter(memcg
->memory
.parent
, memory
);
462 static inline bool mem_cgroup_is_descendant(struct mem_cgroup
*memcg
,
463 struct mem_cgroup
*root
)
467 if (!root
->use_hierarchy
)
469 return cgroup_is_descendant(memcg
->css
.cgroup
, root
->css
.cgroup
);
472 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
473 struct mem_cgroup
*memcg
)
475 struct mem_cgroup
*task_memcg
;
479 task_memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
481 match
= mem_cgroup_is_descendant(task_memcg
, memcg
);
486 struct cgroup_subsys_state
*mem_cgroup_css_from_page(struct page
*page
);
487 ino_t
page_cgroup_ino(struct page
*page
);
489 static inline bool mem_cgroup_online(struct mem_cgroup
*memcg
)
491 if (mem_cgroup_disabled())
493 return !!(memcg
->css
.flags
& CSS_ONLINE
);
497 * For memory reclaim.
499 int mem_cgroup_select_victim_node(struct mem_cgroup
*memcg
);
501 void mem_cgroup_update_lru_size(struct lruvec
*lruvec
, enum lru_list lru
,
502 int zid
, int nr_pages
);
505 unsigned long mem_cgroup_get_zone_lru_size(struct lruvec
*lruvec
,
506 enum lru_list lru
, int zone_idx
)
508 struct mem_cgroup_per_node
*mz
;
510 mz
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
511 return mz
->lru_zone_size
[zone_idx
][lru
];
514 void mem_cgroup_handle_over_high(void);
516 unsigned long mem_cgroup_get_max(struct mem_cgroup
*memcg
);
518 void mem_cgroup_print_oom_context(struct mem_cgroup
*memcg
,
519 struct task_struct
*p
);
521 void mem_cgroup_print_oom_meminfo(struct mem_cgroup
*memcg
);
523 static inline void mem_cgroup_enter_user_fault(void)
525 WARN_ON(current
->in_user_fault
);
526 current
->in_user_fault
= 1;
529 static inline void mem_cgroup_exit_user_fault(void)
531 WARN_ON(!current
->in_user_fault
);
532 current
->in_user_fault
= 0;
535 static inline bool task_in_memcg_oom(struct task_struct
*p
)
537 return p
->memcg_in_oom
;
540 bool mem_cgroup_oom_synchronize(bool wait
);
541 struct mem_cgroup
*mem_cgroup_get_oom_group(struct task_struct
*victim
,
542 struct mem_cgroup
*oom_domain
);
543 void mem_cgroup_print_oom_group(struct mem_cgroup
*memcg
);
545 #ifdef CONFIG_MEMCG_SWAP
546 extern int do_swap_account
;
549 struct mem_cgroup
*lock_page_memcg(struct page
*page
);
550 void __unlock_page_memcg(struct mem_cgroup
*memcg
);
551 void unlock_page_memcg(struct page
*page
);
554 * idx can be of type enum memcg_stat_item or node_stat_item.
555 * Keep in sync with memcg_exact_page_state().
557 static inline unsigned long memcg_page_state(struct mem_cgroup
*memcg
, int idx
)
559 long x
= atomic_long_read(&memcg
->vmstats
[idx
]);
568 * idx can be of type enum memcg_stat_item or node_stat_item.
569 * Keep in sync with memcg_exact_page_state().
571 static inline unsigned long memcg_page_state_local(struct mem_cgroup
*memcg
,
577 for_each_possible_cpu(cpu
)
578 x
+= per_cpu(memcg
->vmstats_local
->stat
[idx
], cpu
);
586 void __mod_memcg_state(struct mem_cgroup
*memcg
, int idx
, int val
);
588 /* idx can be of type enum memcg_stat_item or node_stat_item */
589 static inline void mod_memcg_state(struct mem_cgroup
*memcg
,
594 local_irq_save(flags
);
595 __mod_memcg_state(memcg
, idx
, val
);
596 local_irq_restore(flags
);
600 * mod_memcg_page_state - update page state statistics
602 * @idx: page state item to account
603 * @val: number of pages (positive or negative)
605 * The @page must be locked or the caller must use lock_page_memcg()
606 * to prevent double accounting when the page is concurrently being
607 * moved to another memcg:
609 * lock_page(page) or lock_page_memcg(page)
610 * if (TestClearPageState(page))
611 * mod_memcg_page_state(page, state, -1);
612 * unlock_page(page) or unlock_page_memcg(page)
614 * Kernel pages are an exception to this, since they'll never move.
616 static inline void __mod_memcg_page_state(struct page
*page
,
619 if (page
->mem_cgroup
)
620 __mod_memcg_state(page
->mem_cgroup
, idx
, val
);
623 static inline void mod_memcg_page_state(struct page
*page
,
626 if (page
->mem_cgroup
)
627 mod_memcg_state(page
->mem_cgroup
, idx
, val
);
630 static inline unsigned long lruvec_page_state(struct lruvec
*lruvec
,
631 enum node_stat_item idx
)
633 struct mem_cgroup_per_node
*pn
;
636 if (mem_cgroup_disabled())
637 return node_page_state(lruvec_pgdat(lruvec
), idx
);
639 pn
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
640 x
= atomic_long_read(&pn
->lruvec_stat
[idx
]);
648 static inline unsigned long lruvec_page_state_local(struct lruvec
*lruvec
,
649 enum node_stat_item idx
)
651 struct mem_cgroup_per_node
*pn
;
655 if (mem_cgroup_disabled())
656 return node_page_state(lruvec_pgdat(lruvec
), idx
);
658 pn
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
659 for_each_possible_cpu(cpu
)
660 x
+= per_cpu(pn
->lruvec_stat_local
->count
[idx
], cpu
);
668 void __mod_lruvec_state(struct lruvec
*lruvec
, enum node_stat_item idx
,
671 static inline void mod_lruvec_state(struct lruvec
*lruvec
,
672 enum node_stat_item idx
, int val
)
676 local_irq_save(flags
);
677 __mod_lruvec_state(lruvec
, idx
, val
);
678 local_irq_restore(flags
);
681 static inline void __mod_lruvec_page_state(struct page
*page
,
682 enum node_stat_item idx
, int val
)
684 pg_data_t
*pgdat
= page_pgdat(page
);
685 struct lruvec
*lruvec
;
687 /* Untracked pages have no memcg, no lruvec. Update only the node */
688 if (!page
->mem_cgroup
) {
689 __mod_node_page_state(pgdat
, idx
, val
);
693 lruvec
= mem_cgroup_lruvec(pgdat
, page
->mem_cgroup
);
694 __mod_lruvec_state(lruvec
, idx
, val
);
697 static inline void mod_lruvec_page_state(struct page
*page
,
698 enum node_stat_item idx
, int val
)
702 local_irq_save(flags
);
703 __mod_lruvec_page_state(page
, idx
, val
);
704 local_irq_restore(flags
);
707 unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t
*pgdat
, int order
,
709 unsigned long *total_scanned
);
711 void __count_memcg_events(struct mem_cgroup
*memcg
, enum vm_event_item idx
,
712 unsigned long count
);
714 static inline void count_memcg_events(struct mem_cgroup
*memcg
,
715 enum vm_event_item idx
,
720 local_irq_save(flags
);
721 __count_memcg_events(memcg
, idx
, count
);
722 local_irq_restore(flags
);
725 static inline void count_memcg_page_event(struct page
*page
,
726 enum vm_event_item idx
)
728 if (page
->mem_cgroup
)
729 count_memcg_events(page
->mem_cgroup
, idx
, 1);
732 static inline void count_memcg_event_mm(struct mm_struct
*mm
,
733 enum vm_event_item idx
)
735 struct mem_cgroup
*memcg
;
737 if (mem_cgroup_disabled())
741 memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
743 count_memcg_events(memcg
, idx
, 1);
747 static inline void memcg_memory_event(struct mem_cgroup
*memcg
,
748 enum memcg_memory_event event
)
751 atomic_long_inc(&memcg
->memory_events
[event
]);
752 cgroup_file_notify(&memcg
->events_file
);
754 if (cgrp_dfl_root
.flags
& CGRP_ROOT_MEMORY_LOCAL_EVENTS
)
756 } while ((memcg
= parent_mem_cgroup(memcg
)) &&
757 !mem_cgroup_is_root(memcg
));
760 static inline void memcg_memory_event_mm(struct mm_struct
*mm
,
761 enum memcg_memory_event event
)
763 struct mem_cgroup
*memcg
;
765 if (mem_cgroup_disabled())
769 memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
771 memcg_memory_event(memcg
, event
);
775 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
776 void mem_cgroup_split_huge_fixup(struct page
*head
);
779 #else /* CONFIG_MEMCG */
781 #define MEM_CGROUP_ID_SHIFT 0
782 #define MEM_CGROUP_ID_MAX 0
786 static inline bool mem_cgroup_is_root(struct mem_cgroup
*memcg
)
791 static inline bool mem_cgroup_disabled(void)
796 static inline void memcg_memory_event(struct mem_cgroup
*memcg
,
797 enum memcg_memory_event event
)
801 static inline void memcg_memory_event_mm(struct mm_struct
*mm
,
802 enum memcg_memory_event event
)
806 static inline enum mem_cgroup_protection
mem_cgroup_protected(
807 struct mem_cgroup
*root
, struct mem_cgroup
*memcg
)
809 return MEMCG_PROT_NONE
;
812 static inline int mem_cgroup_try_charge(struct page
*page
, struct mm_struct
*mm
,
814 struct mem_cgroup
**memcgp
,
821 static inline int mem_cgroup_try_charge_delay(struct page
*page
,
822 struct mm_struct
*mm
,
824 struct mem_cgroup
**memcgp
,
831 static inline void mem_cgroup_commit_charge(struct page
*page
,
832 struct mem_cgroup
*memcg
,
833 bool lrucare
, bool compound
)
837 static inline void mem_cgroup_cancel_charge(struct page
*page
,
838 struct mem_cgroup
*memcg
,
843 static inline void mem_cgroup_uncharge(struct page
*page
)
847 static inline void mem_cgroup_uncharge_list(struct list_head
*page_list
)
851 static inline void mem_cgroup_migrate(struct page
*old
, struct page
*new)
855 static inline struct lruvec
*mem_cgroup_lruvec(struct pglist_data
*pgdat
,
856 struct mem_cgroup
*memcg
)
858 return node_lruvec(pgdat
);
861 static inline struct lruvec
*mem_cgroup_page_lruvec(struct page
*page
,
862 struct pglist_data
*pgdat
)
864 return &pgdat
->lruvec
;
867 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
868 struct mem_cgroup
*memcg
)
873 static inline bool task_in_mem_cgroup(struct task_struct
*task
,
874 const struct mem_cgroup
*memcg
)
879 static inline struct mem_cgroup
*get_mem_cgroup_from_mm(struct mm_struct
*mm
)
884 static inline struct mem_cgroup
*get_mem_cgroup_from_page(struct page
*page
)
889 static inline void mem_cgroup_put(struct mem_cgroup
*memcg
)
893 static inline struct mem_cgroup
*
894 mem_cgroup_iter(struct mem_cgroup
*root
,
895 struct mem_cgroup
*prev
,
896 struct mem_cgroup_reclaim_cookie
*reclaim
)
901 static inline void mem_cgroup_iter_break(struct mem_cgroup
*root
,
902 struct mem_cgroup
*prev
)
906 static inline int mem_cgroup_scan_tasks(struct mem_cgroup
*memcg
,
907 int (*fn
)(struct task_struct
*, void *), void *arg
)
912 static inline unsigned short mem_cgroup_id(struct mem_cgroup
*memcg
)
917 static inline struct mem_cgroup
*mem_cgroup_from_id(unsigned short id
)
920 /* XXX: This should always return root_mem_cgroup */
924 static inline struct mem_cgroup
*mem_cgroup_from_seq(struct seq_file
*m
)
929 static inline struct mem_cgroup
*lruvec_memcg(struct lruvec
*lruvec
)
934 static inline bool mem_cgroup_online(struct mem_cgroup
*memcg
)
940 unsigned long mem_cgroup_get_zone_lru_size(struct lruvec
*lruvec
,
941 enum lru_list lru
, int zone_idx
)
946 static inline unsigned long mem_cgroup_get_max(struct mem_cgroup
*memcg
)
952 mem_cgroup_print_oom_context(struct mem_cgroup
*memcg
, struct task_struct
*p
)
957 mem_cgroup_print_oom_meminfo(struct mem_cgroup
*memcg
)
961 static inline struct mem_cgroup
*lock_page_memcg(struct page
*page
)
966 static inline void __unlock_page_memcg(struct mem_cgroup
*memcg
)
970 static inline void unlock_page_memcg(struct page
*page
)
974 static inline void mem_cgroup_handle_over_high(void)
978 static inline void mem_cgroup_enter_user_fault(void)
982 static inline void mem_cgroup_exit_user_fault(void)
986 static inline bool task_in_memcg_oom(struct task_struct
*p
)
991 static inline bool mem_cgroup_oom_synchronize(bool wait
)
996 static inline struct mem_cgroup
*mem_cgroup_get_oom_group(
997 struct task_struct
*victim
, struct mem_cgroup
*oom_domain
)
1002 static inline void mem_cgroup_print_oom_group(struct mem_cgroup
*memcg
)
1006 static inline unsigned long memcg_page_state(struct mem_cgroup
*memcg
, int idx
)
1011 static inline unsigned long memcg_page_state_local(struct mem_cgroup
*memcg
,
1017 static inline void __mod_memcg_state(struct mem_cgroup
*memcg
,
1023 static inline void mod_memcg_state(struct mem_cgroup
*memcg
,
1029 static inline void __mod_memcg_page_state(struct page
*page
,
1035 static inline void mod_memcg_page_state(struct page
*page
,
1041 static inline unsigned long lruvec_page_state(struct lruvec
*lruvec
,
1042 enum node_stat_item idx
)
1044 return node_page_state(lruvec_pgdat(lruvec
), idx
);
1047 static inline unsigned long lruvec_page_state_local(struct lruvec
*lruvec
,
1048 enum node_stat_item idx
)
1050 return node_page_state(lruvec_pgdat(lruvec
), idx
);
1053 static inline void __mod_lruvec_state(struct lruvec
*lruvec
,
1054 enum node_stat_item idx
, int val
)
1056 __mod_node_page_state(lruvec_pgdat(lruvec
), idx
, val
);
1059 static inline void mod_lruvec_state(struct lruvec
*lruvec
,
1060 enum node_stat_item idx
, int val
)
1062 mod_node_page_state(lruvec_pgdat(lruvec
), idx
, val
);
1065 static inline void __mod_lruvec_page_state(struct page
*page
,
1066 enum node_stat_item idx
, int val
)
1068 __mod_node_page_state(page_pgdat(page
), idx
, val
);
1071 static inline void mod_lruvec_page_state(struct page
*page
,
1072 enum node_stat_item idx
, int val
)
1074 mod_node_page_state(page_pgdat(page
), idx
, val
);
1078 unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t
*pgdat
, int order
,
1080 unsigned long *total_scanned
)
1085 static inline void mem_cgroup_split_huge_fixup(struct page
*head
)
1089 static inline void count_memcg_events(struct mem_cgroup
*memcg
,
1090 enum vm_event_item idx
,
1091 unsigned long count
)
1095 static inline void __count_memcg_events(struct mem_cgroup
*memcg
,
1096 enum vm_event_item idx
,
1097 unsigned long count
)
1101 static inline void count_memcg_page_event(struct page
*page
,
1107 void count_memcg_event_mm(struct mm_struct
*mm
, enum vm_event_item idx
)
1110 #endif /* CONFIG_MEMCG */
1112 /* idx can be of type enum memcg_stat_item or node_stat_item */
1113 static inline void __inc_memcg_state(struct mem_cgroup
*memcg
,
1116 __mod_memcg_state(memcg
, idx
, 1);
1119 /* idx can be of type enum memcg_stat_item or node_stat_item */
1120 static inline void __dec_memcg_state(struct mem_cgroup
*memcg
,
1123 __mod_memcg_state(memcg
, idx
, -1);
1126 /* idx can be of type enum memcg_stat_item or node_stat_item */
1127 static inline void __inc_memcg_page_state(struct page
*page
,
1130 __mod_memcg_page_state(page
, idx
, 1);
1133 /* idx can be of type enum memcg_stat_item or node_stat_item */
1134 static inline void __dec_memcg_page_state(struct page
*page
,
1137 __mod_memcg_page_state(page
, idx
, -1);
1140 static inline void __inc_lruvec_state(struct lruvec
*lruvec
,
1141 enum node_stat_item idx
)
1143 __mod_lruvec_state(lruvec
, idx
, 1);
1146 static inline void __dec_lruvec_state(struct lruvec
*lruvec
,
1147 enum node_stat_item idx
)
1149 __mod_lruvec_state(lruvec
, idx
, -1);
1152 static inline void __inc_lruvec_page_state(struct page
*page
,
1153 enum node_stat_item idx
)
1155 __mod_lruvec_page_state(page
, idx
, 1);
1158 static inline void __dec_lruvec_page_state(struct page
*page
,
1159 enum node_stat_item idx
)
1161 __mod_lruvec_page_state(page
, idx
, -1);
1164 /* idx can be of type enum memcg_stat_item or node_stat_item */
1165 static inline void inc_memcg_state(struct mem_cgroup
*memcg
,
1168 mod_memcg_state(memcg
, idx
, 1);
1171 /* idx can be of type enum memcg_stat_item or node_stat_item */
1172 static inline void dec_memcg_state(struct mem_cgroup
*memcg
,
1175 mod_memcg_state(memcg
, idx
, -1);
1178 /* idx can be of type enum memcg_stat_item or node_stat_item */
1179 static inline void inc_memcg_page_state(struct page
*page
,
1182 mod_memcg_page_state(page
, idx
, 1);
1185 /* idx can be of type enum memcg_stat_item or node_stat_item */
1186 static inline void dec_memcg_page_state(struct page
*page
,
1189 mod_memcg_page_state(page
, idx
, -1);
1192 static inline void inc_lruvec_state(struct lruvec
*lruvec
,
1193 enum node_stat_item idx
)
1195 mod_lruvec_state(lruvec
, idx
, 1);
1198 static inline void dec_lruvec_state(struct lruvec
*lruvec
,
1199 enum node_stat_item idx
)
1201 mod_lruvec_state(lruvec
, idx
, -1);
1204 static inline void inc_lruvec_page_state(struct page
*page
,
1205 enum node_stat_item idx
)
1207 mod_lruvec_page_state(page
, idx
, 1);
1210 static inline void dec_lruvec_page_state(struct page
*page
,
1211 enum node_stat_item idx
)
1213 mod_lruvec_page_state(page
, idx
, -1);
1216 #ifdef CONFIG_CGROUP_WRITEBACK
1218 struct wb_domain
*mem_cgroup_wb_domain(struct bdi_writeback
*wb
);
1219 void mem_cgroup_wb_stats(struct bdi_writeback
*wb
, unsigned long *pfilepages
,
1220 unsigned long *pheadroom
, unsigned long *pdirty
,
1221 unsigned long *pwriteback
);
1223 #else /* CONFIG_CGROUP_WRITEBACK */
1225 static inline struct wb_domain
*mem_cgroup_wb_domain(struct bdi_writeback
*wb
)
1230 static inline void mem_cgroup_wb_stats(struct bdi_writeback
*wb
,
1231 unsigned long *pfilepages
,
1232 unsigned long *pheadroom
,
1233 unsigned long *pdirty
,
1234 unsigned long *pwriteback
)
1238 #endif /* CONFIG_CGROUP_WRITEBACK */
1241 bool mem_cgroup_charge_skmem(struct mem_cgroup
*memcg
, unsigned int nr_pages
);
1242 void mem_cgroup_uncharge_skmem(struct mem_cgroup
*memcg
, unsigned int nr_pages
);
1244 extern struct static_key_false memcg_sockets_enabled_key
;
1245 #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key)
1246 void mem_cgroup_sk_alloc(struct sock
*sk
);
1247 void mem_cgroup_sk_free(struct sock
*sk
);
1248 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup
*memcg
)
1250 if (!cgroup_subsys_on_dfl(memory_cgrp_subsys
) && memcg
->tcpmem_pressure
)
1253 if (time_before(jiffies
, memcg
->socket_pressure
))
1255 } while ((memcg
= parent_mem_cgroup(memcg
)));
1259 #define mem_cgroup_sockets_enabled 0
1260 static inline void mem_cgroup_sk_alloc(struct sock
*sk
) { };
1261 static inline void mem_cgroup_sk_free(struct sock
*sk
) { };
1262 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup
*memcg
)
1268 struct kmem_cache
*memcg_kmem_get_cache(struct kmem_cache
*cachep
);
1269 void memcg_kmem_put_cache(struct kmem_cache
*cachep
);
1271 #ifdef CONFIG_MEMCG_KMEM
1272 int __memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
);
1273 void __memcg_kmem_uncharge(struct page
*page
, int order
);
1274 int __memcg_kmem_charge_memcg(struct page
*page
, gfp_t gfp
, int order
,
1275 struct mem_cgroup
*memcg
);
1277 extern struct static_key_false memcg_kmem_enabled_key
;
1278 extern struct workqueue_struct
*memcg_kmem_cache_wq
;
1280 extern int memcg_nr_cache_ids
;
1281 void memcg_get_cache_ids(void);
1282 void memcg_put_cache_ids(void);
1285 * Helper macro to loop through all memcg-specific caches. Callers must still
1286 * check if the cache is valid (it is either valid or NULL).
1287 * the slab_mutex must be held when looping through those caches
1289 #define for_each_memcg_cache_index(_idx) \
1290 for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++)
1292 static inline bool memcg_kmem_enabled(void)
1294 return static_branch_unlikely(&memcg_kmem_enabled_key
);
1297 static inline int memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
)
1299 if (memcg_kmem_enabled())
1300 return __memcg_kmem_charge(page
, gfp
, order
);
1304 static inline void memcg_kmem_uncharge(struct page
*page
, int order
)
1306 if (memcg_kmem_enabled())
1307 __memcg_kmem_uncharge(page
, order
);
1310 static inline int memcg_kmem_charge_memcg(struct page
*page
, gfp_t gfp
,
1311 int order
, struct mem_cgroup
*memcg
)
1313 if (memcg_kmem_enabled())
1314 return __memcg_kmem_charge_memcg(page
, gfp
, order
, memcg
);
1318 * helper for accessing a memcg's index. It will be used as an index in the
1319 * child cache array in kmem_cache, and also to derive its name. This function
1320 * will return -1 when this is not a kmem-limited memcg.
1322 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
1324 return memcg
? memcg
->kmemcg_id
: -1;
1327 extern int memcg_expand_shrinker_maps(int new_id
);
1329 extern void memcg_set_shrinker_bit(struct mem_cgroup
*memcg
,
1330 int nid
, int shrinker_id
);
1333 static inline int memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
)
1338 static inline void memcg_kmem_uncharge(struct page
*page
, int order
)
1342 static inline int __memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
)
1347 static inline void __memcg_kmem_uncharge(struct page
*page
, int order
)
1351 #define for_each_memcg_cache_index(_idx) \
1354 static inline bool memcg_kmem_enabled(void)
1359 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
1364 static inline void memcg_get_cache_ids(void)
1368 static inline void memcg_put_cache_ids(void)
1372 static inline void memcg_set_shrinker_bit(struct mem_cgroup
*memcg
,
1373 int nid
, int shrinker_id
) { }
1374 #endif /* CONFIG_MEMCG_KMEM */
1376 #endif /* _LINUX_MEMCONTROL_H */