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
;
236 /* memory.events and memory.events.local */
237 struct cgroup_file events_file
;
238 struct cgroup_file events_local_file
;
240 /* handle for "memory.swap.events" */
241 struct cgroup_file swap_events_file
;
243 /* protect arrays of thresholds */
244 struct mutex thresholds_lock
;
246 /* thresholds for memory usage. RCU-protected */
247 struct mem_cgroup_thresholds thresholds
;
249 /* thresholds for mem+swap usage. RCU-protected */
250 struct mem_cgroup_thresholds memsw_thresholds
;
252 /* For oom notifier event fd */
253 struct list_head oom_notify
;
256 * Should we move charges of a task when a task is moved into this
257 * mem_cgroup ? And what type of charges should we move ?
259 unsigned long move_charge_at_immigrate
;
260 /* taken only while moving_account > 0 */
261 spinlock_t move_lock
;
262 unsigned long move_lock_flags
;
264 MEMCG_PADDING(_pad1_
);
267 * set > 0 if pages under this cgroup are moving to other cgroup.
269 atomic_t moving_account
;
270 struct task_struct
*move_lock_task
;
272 /* Legacy local VM stats and events */
273 struct memcg_vmstats_percpu __percpu
*vmstats_local
;
275 /* Subtree VM stats and events (batched updates) */
276 struct memcg_vmstats_percpu __percpu
*vmstats_percpu
;
278 MEMCG_PADDING(_pad2_
);
280 atomic_long_t vmstats
[MEMCG_NR_STAT
];
281 atomic_long_t vmevents
[NR_VM_EVENT_ITEMS
];
284 atomic_long_t memory_events
[MEMCG_NR_MEMORY_EVENTS
];
285 atomic_long_t memory_events_local
[MEMCG_NR_MEMORY_EVENTS
];
287 unsigned long socket_pressure
;
289 /* Legacy tcp memory accounting */
293 #ifdef CONFIG_MEMCG_KMEM
294 /* Index in the kmem_cache->memcg_params.memcg_caches array */
296 enum memcg_kmem_state kmem_state
;
297 struct list_head kmem_caches
;
300 int last_scanned_node
;
302 nodemask_t scan_nodes
;
303 atomic_t numainfo_events
;
304 atomic_t numainfo_updating
;
307 #ifdef CONFIG_CGROUP_WRITEBACK
308 struct list_head cgwb_list
;
309 struct wb_domain cgwb_domain
;
312 /* List of events which userspace want to receive */
313 struct list_head event_list
;
314 spinlock_t event_list_lock
;
316 struct mem_cgroup_per_node
*nodeinfo
[0];
317 /* WARNING: nodeinfo must be the last member here */
321 * size of first charge trial. "32" comes from vmscan.c's magic value.
322 * TODO: maybe necessary to use big numbers in big irons.
324 #define MEMCG_CHARGE_BATCH 32U
326 extern struct mem_cgroup
*root_mem_cgroup
;
328 static inline bool mem_cgroup_is_root(struct mem_cgroup
*memcg
)
330 return (memcg
== root_mem_cgroup
);
333 static inline bool mem_cgroup_disabled(void)
335 return !cgroup_subsys_enabled(memory_cgrp_subsys
);
338 enum mem_cgroup_protection
mem_cgroup_protected(struct mem_cgroup
*root
,
339 struct mem_cgroup
*memcg
);
341 int mem_cgroup_try_charge(struct page
*page
, struct mm_struct
*mm
,
342 gfp_t gfp_mask
, struct mem_cgroup
**memcgp
,
344 int mem_cgroup_try_charge_delay(struct page
*page
, struct mm_struct
*mm
,
345 gfp_t gfp_mask
, struct mem_cgroup
**memcgp
,
347 void mem_cgroup_commit_charge(struct page
*page
, struct mem_cgroup
*memcg
,
348 bool lrucare
, bool compound
);
349 void mem_cgroup_cancel_charge(struct page
*page
, struct mem_cgroup
*memcg
,
351 void mem_cgroup_uncharge(struct page
*page
);
352 void mem_cgroup_uncharge_list(struct list_head
*page_list
);
354 void mem_cgroup_migrate(struct page
*oldpage
, struct page
*newpage
);
356 static struct mem_cgroup_per_node
*
357 mem_cgroup_nodeinfo(struct mem_cgroup
*memcg
, int nid
)
359 return memcg
->nodeinfo
[nid
];
363 * mem_cgroup_lruvec - get the lru list vector for a node or a memcg zone
364 * @node: node of the wanted lruvec
365 * @memcg: memcg of the wanted lruvec
367 * Returns the lru list vector holding pages for a given @node or a given
368 * @memcg and @zone. This can be the node lruvec, if the memory controller
371 static inline struct lruvec
*mem_cgroup_lruvec(struct pglist_data
*pgdat
,
372 struct mem_cgroup
*memcg
)
374 struct mem_cgroup_per_node
*mz
;
375 struct lruvec
*lruvec
;
377 if (mem_cgroup_disabled()) {
378 lruvec
= node_lruvec(pgdat
);
382 mz
= mem_cgroup_nodeinfo(memcg
, pgdat
->node_id
);
383 lruvec
= &mz
->lruvec
;
386 * Since a node can be onlined after the mem_cgroup was created,
387 * we have to be prepared to initialize lruvec->pgdat here;
388 * and if offlined then reonlined, we need to reinitialize it.
390 if (unlikely(lruvec
->pgdat
!= pgdat
))
391 lruvec
->pgdat
= pgdat
;
395 struct lruvec
*mem_cgroup_page_lruvec(struct page
*, struct pglist_data
*);
397 bool task_in_mem_cgroup(struct task_struct
*task
, struct mem_cgroup
*memcg
);
398 struct mem_cgroup
*mem_cgroup_from_task(struct task_struct
*p
);
400 struct mem_cgroup
*get_mem_cgroup_from_mm(struct mm_struct
*mm
);
402 struct mem_cgroup
*get_mem_cgroup_from_page(struct page
*page
);
405 struct mem_cgroup
*mem_cgroup_from_css(struct cgroup_subsys_state
*css
){
406 return css
? container_of(css
, struct mem_cgroup
, css
) : NULL
;
409 static inline void mem_cgroup_put(struct mem_cgroup
*memcg
)
412 css_put(&memcg
->css
);
415 #define mem_cgroup_from_counter(counter, member) \
416 container_of(counter, struct mem_cgroup, member)
418 struct mem_cgroup
*mem_cgroup_iter(struct mem_cgroup
*,
420 struct mem_cgroup_reclaim_cookie
*);
421 void mem_cgroup_iter_break(struct mem_cgroup
*, struct mem_cgroup
*);
422 int mem_cgroup_scan_tasks(struct mem_cgroup
*,
423 int (*)(struct task_struct
*, void *), void *);
425 static inline unsigned short mem_cgroup_id(struct mem_cgroup
*memcg
)
427 if (mem_cgroup_disabled())
432 struct mem_cgroup
*mem_cgroup_from_id(unsigned short id
);
434 static inline struct mem_cgroup
*mem_cgroup_from_seq(struct seq_file
*m
)
436 return mem_cgroup_from_css(seq_css(m
));
439 static inline struct mem_cgroup
*lruvec_memcg(struct lruvec
*lruvec
)
441 struct mem_cgroup_per_node
*mz
;
443 if (mem_cgroup_disabled())
446 mz
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
451 * parent_mem_cgroup - find the accounting parent of a memcg
452 * @memcg: memcg whose parent to find
454 * Returns the parent memcg, or NULL if this is the root or the memory
455 * controller is in legacy no-hierarchy mode.
457 static inline struct mem_cgroup
*parent_mem_cgroup(struct mem_cgroup
*memcg
)
459 if (!memcg
->memory
.parent
)
461 return mem_cgroup_from_counter(memcg
->memory
.parent
, memory
);
464 static inline bool mem_cgroup_is_descendant(struct mem_cgroup
*memcg
,
465 struct mem_cgroup
*root
)
469 if (!root
->use_hierarchy
)
471 return cgroup_is_descendant(memcg
->css
.cgroup
, root
->css
.cgroup
);
474 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
475 struct mem_cgroup
*memcg
)
477 struct mem_cgroup
*task_memcg
;
481 task_memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
483 match
= mem_cgroup_is_descendant(task_memcg
, memcg
);
488 struct cgroup_subsys_state
*mem_cgroup_css_from_page(struct page
*page
);
489 ino_t
page_cgroup_ino(struct page
*page
);
491 static inline bool mem_cgroup_online(struct mem_cgroup
*memcg
)
493 if (mem_cgroup_disabled())
495 return !!(memcg
->css
.flags
& CSS_ONLINE
);
499 * For memory reclaim.
501 int mem_cgroup_select_victim_node(struct mem_cgroup
*memcg
);
503 void mem_cgroup_update_lru_size(struct lruvec
*lruvec
, enum lru_list lru
,
504 int zid
, int nr_pages
);
507 unsigned long mem_cgroup_get_zone_lru_size(struct lruvec
*lruvec
,
508 enum lru_list lru
, int zone_idx
)
510 struct mem_cgroup_per_node
*mz
;
512 mz
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
513 return mz
->lru_zone_size
[zone_idx
][lru
];
516 void mem_cgroup_handle_over_high(void);
518 unsigned long mem_cgroup_get_max(struct mem_cgroup
*memcg
);
520 void mem_cgroup_print_oom_context(struct mem_cgroup
*memcg
,
521 struct task_struct
*p
);
523 void mem_cgroup_print_oom_meminfo(struct mem_cgroup
*memcg
);
525 static inline void mem_cgroup_enter_user_fault(void)
527 WARN_ON(current
->in_user_fault
);
528 current
->in_user_fault
= 1;
531 static inline void mem_cgroup_exit_user_fault(void)
533 WARN_ON(!current
->in_user_fault
);
534 current
->in_user_fault
= 0;
537 static inline bool task_in_memcg_oom(struct task_struct
*p
)
539 return p
->memcg_in_oom
;
542 bool mem_cgroup_oom_synchronize(bool wait
);
543 struct mem_cgroup
*mem_cgroup_get_oom_group(struct task_struct
*victim
,
544 struct mem_cgroup
*oom_domain
);
545 void mem_cgroup_print_oom_group(struct mem_cgroup
*memcg
);
547 #ifdef CONFIG_MEMCG_SWAP
548 extern int do_swap_account
;
551 struct mem_cgroup
*lock_page_memcg(struct page
*page
);
552 void __unlock_page_memcg(struct mem_cgroup
*memcg
);
553 void unlock_page_memcg(struct page
*page
);
556 * idx can be of type enum memcg_stat_item or node_stat_item.
557 * Keep in sync with memcg_exact_page_state().
559 static inline unsigned long memcg_page_state(struct mem_cgroup
*memcg
, int idx
)
561 long x
= atomic_long_read(&memcg
->vmstats
[idx
]);
570 * idx can be of type enum memcg_stat_item or node_stat_item.
571 * Keep in sync with memcg_exact_page_state().
573 static inline unsigned long memcg_page_state_local(struct mem_cgroup
*memcg
,
579 for_each_possible_cpu(cpu
)
580 x
+= per_cpu(memcg
->vmstats_local
->stat
[idx
], cpu
);
588 void __mod_memcg_state(struct mem_cgroup
*memcg
, int idx
, int val
);
590 /* idx can be of type enum memcg_stat_item or node_stat_item */
591 static inline void mod_memcg_state(struct mem_cgroup
*memcg
,
596 local_irq_save(flags
);
597 __mod_memcg_state(memcg
, idx
, val
);
598 local_irq_restore(flags
);
602 * mod_memcg_page_state - update page state statistics
604 * @idx: page state item to account
605 * @val: number of pages (positive or negative)
607 * The @page must be locked or the caller must use lock_page_memcg()
608 * to prevent double accounting when the page is concurrently being
609 * moved to another memcg:
611 * lock_page(page) or lock_page_memcg(page)
612 * if (TestClearPageState(page))
613 * mod_memcg_page_state(page, state, -1);
614 * unlock_page(page) or unlock_page_memcg(page)
616 * Kernel pages are an exception to this, since they'll never move.
618 static inline void __mod_memcg_page_state(struct page
*page
,
621 if (page
->mem_cgroup
)
622 __mod_memcg_state(page
->mem_cgroup
, idx
, val
);
625 static inline void mod_memcg_page_state(struct page
*page
,
628 if (page
->mem_cgroup
)
629 mod_memcg_state(page
->mem_cgroup
, idx
, val
);
632 static inline unsigned long lruvec_page_state(struct lruvec
*lruvec
,
633 enum node_stat_item idx
)
635 struct mem_cgroup_per_node
*pn
;
638 if (mem_cgroup_disabled())
639 return node_page_state(lruvec_pgdat(lruvec
), idx
);
641 pn
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
642 x
= atomic_long_read(&pn
->lruvec_stat
[idx
]);
650 static inline unsigned long lruvec_page_state_local(struct lruvec
*lruvec
,
651 enum node_stat_item idx
)
653 struct mem_cgroup_per_node
*pn
;
657 if (mem_cgroup_disabled())
658 return node_page_state(lruvec_pgdat(lruvec
), idx
);
660 pn
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
661 for_each_possible_cpu(cpu
)
662 x
+= per_cpu(pn
->lruvec_stat_local
->count
[idx
], cpu
);
670 void __mod_lruvec_state(struct lruvec
*lruvec
, enum node_stat_item idx
,
673 static inline void mod_lruvec_state(struct lruvec
*lruvec
,
674 enum node_stat_item idx
, int val
)
678 local_irq_save(flags
);
679 __mod_lruvec_state(lruvec
, idx
, val
);
680 local_irq_restore(flags
);
683 static inline void __mod_lruvec_page_state(struct page
*page
,
684 enum node_stat_item idx
, int val
)
686 pg_data_t
*pgdat
= page_pgdat(page
);
687 struct lruvec
*lruvec
;
689 /* Untracked pages have no memcg, no lruvec. Update only the node */
690 if (!page
->mem_cgroup
) {
691 __mod_node_page_state(pgdat
, idx
, val
);
695 lruvec
= mem_cgroup_lruvec(pgdat
, page
->mem_cgroup
);
696 __mod_lruvec_state(lruvec
, idx
, val
);
699 static inline void mod_lruvec_page_state(struct page
*page
,
700 enum node_stat_item idx
, int val
)
704 local_irq_save(flags
);
705 __mod_lruvec_page_state(page
, idx
, val
);
706 local_irq_restore(flags
);
709 unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t
*pgdat
, int order
,
711 unsigned long *total_scanned
);
713 void __count_memcg_events(struct mem_cgroup
*memcg
, enum vm_event_item idx
,
714 unsigned long count
);
716 static inline void count_memcg_events(struct mem_cgroup
*memcg
,
717 enum vm_event_item idx
,
722 local_irq_save(flags
);
723 __count_memcg_events(memcg
, idx
, count
);
724 local_irq_restore(flags
);
727 static inline void count_memcg_page_event(struct page
*page
,
728 enum vm_event_item idx
)
730 if (page
->mem_cgroup
)
731 count_memcg_events(page
->mem_cgroup
, idx
, 1);
734 static inline void count_memcg_event_mm(struct mm_struct
*mm
,
735 enum vm_event_item idx
)
737 struct mem_cgroup
*memcg
;
739 if (mem_cgroup_disabled())
743 memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
745 count_memcg_events(memcg
, idx
, 1);
749 static inline void memcg_memory_event(struct mem_cgroup
*memcg
,
750 enum memcg_memory_event event
)
752 atomic_long_inc(&memcg
->memory_events_local
[event
]);
753 cgroup_file_notify(&memcg
->events_local_file
);
756 atomic_long_inc(&memcg
->memory_events
[event
]);
757 cgroup_file_notify(&memcg
->events_file
);
759 if (cgrp_dfl_root
.flags
& CGRP_ROOT_MEMORY_LOCAL_EVENTS
)
761 } while ((memcg
= parent_mem_cgroup(memcg
)) &&
762 !mem_cgroup_is_root(memcg
));
765 static inline void memcg_memory_event_mm(struct mm_struct
*mm
,
766 enum memcg_memory_event event
)
768 struct mem_cgroup
*memcg
;
770 if (mem_cgroup_disabled())
774 memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
776 memcg_memory_event(memcg
, event
);
780 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
781 void mem_cgroup_split_huge_fixup(struct page
*head
);
784 #else /* CONFIG_MEMCG */
786 #define MEM_CGROUP_ID_SHIFT 0
787 #define MEM_CGROUP_ID_MAX 0
791 static inline bool mem_cgroup_is_root(struct mem_cgroup
*memcg
)
796 static inline bool mem_cgroup_disabled(void)
801 static inline void memcg_memory_event(struct mem_cgroup
*memcg
,
802 enum memcg_memory_event event
)
806 static inline void memcg_memory_event_mm(struct mm_struct
*mm
,
807 enum memcg_memory_event event
)
811 static inline enum mem_cgroup_protection
mem_cgroup_protected(
812 struct mem_cgroup
*root
, struct mem_cgroup
*memcg
)
814 return MEMCG_PROT_NONE
;
817 static inline int mem_cgroup_try_charge(struct page
*page
, struct mm_struct
*mm
,
819 struct mem_cgroup
**memcgp
,
826 static inline int mem_cgroup_try_charge_delay(struct page
*page
,
827 struct mm_struct
*mm
,
829 struct mem_cgroup
**memcgp
,
836 static inline void mem_cgroup_commit_charge(struct page
*page
,
837 struct mem_cgroup
*memcg
,
838 bool lrucare
, bool compound
)
842 static inline void mem_cgroup_cancel_charge(struct page
*page
,
843 struct mem_cgroup
*memcg
,
848 static inline void mem_cgroup_uncharge(struct page
*page
)
852 static inline void mem_cgroup_uncharge_list(struct list_head
*page_list
)
856 static inline void mem_cgroup_migrate(struct page
*old
, struct page
*new)
860 static inline struct lruvec
*mem_cgroup_lruvec(struct pglist_data
*pgdat
,
861 struct mem_cgroup
*memcg
)
863 return node_lruvec(pgdat
);
866 static inline struct lruvec
*mem_cgroup_page_lruvec(struct page
*page
,
867 struct pglist_data
*pgdat
)
869 return &pgdat
->lruvec
;
872 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
873 struct mem_cgroup
*memcg
)
878 static inline bool task_in_mem_cgroup(struct task_struct
*task
,
879 const struct mem_cgroup
*memcg
)
884 static inline struct mem_cgroup
*get_mem_cgroup_from_mm(struct mm_struct
*mm
)
889 static inline struct mem_cgroup
*get_mem_cgroup_from_page(struct page
*page
)
894 static inline void mem_cgroup_put(struct mem_cgroup
*memcg
)
898 static inline struct mem_cgroup
*
899 mem_cgroup_iter(struct mem_cgroup
*root
,
900 struct mem_cgroup
*prev
,
901 struct mem_cgroup_reclaim_cookie
*reclaim
)
906 static inline void mem_cgroup_iter_break(struct mem_cgroup
*root
,
907 struct mem_cgroup
*prev
)
911 static inline int mem_cgroup_scan_tasks(struct mem_cgroup
*memcg
,
912 int (*fn
)(struct task_struct
*, void *), void *arg
)
917 static inline unsigned short mem_cgroup_id(struct mem_cgroup
*memcg
)
922 static inline struct mem_cgroup
*mem_cgroup_from_id(unsigned short id
)
925 /* XXX: This should always return root_mem_cgroup */
929 static inline struct mem_cgroup
*mem_cgroup_from_seq(struct seq_file
*m
)
934 static inline struct mem_cgroup
*lruvec_memcg(struct lruvec
*lruvec
)
939 static inline bool mem_cgroup_online(struct mem_cgroup
*memcg
)
945 unsigned long mem_cgroup_get_zone_lru_size(struct lruvec
*lruvec
,
946 enum lru_list lru
, int zone_idx
)
951 static inline unsigned long mem_cgroup_get_max(struct mem_cgroup
*memcg
)
957 mem_cgroup_print_oom_context(struct mem_cgroup
*memcg
, struct task_struct
*p
)
962 mem_cgroup_print_oom_meminfo(struct mem_cgroup
*memcg
)
966 static inline struct mem_cgroup
*lock_page_memcg(struct page
*page
)
971 static inline void __unlock_page_memcg(struct mem_cgroup
*memcg
)
975 static inline void unlock_page_memcg(struct page
*page
)
979 static inline void mem_cgroup_handle_over_high(void)
983 static inline void mem_cgroup_enter_user_fault(void)
987 static inline void mem_cgroup_exit_user_fault(void)
991 static inline bool task_in_memcg_oom(struct task_struct
*p
)
996 static inline bool mem_cgroup_oom_synchronize(bool wait
)
1001 static inline struct mem_cgroup
*mem_cgroup_get_oom_group(
1002 struct task_struct
*victim
, struct mem_cgroup
*oom_domain
)
1007 static inline void mem_cgroup_print_oom_group(struct mem_cgroup
*memcg
)
1011 static inline unsigned long memcg_page_state(struct mem_cgroup
*memcg
, int idx
)
1016 static inline unsigned long memcg_page_state_local(struct mem_cgroup
*memcg
,
1022 static inline void __mod_memcg_state(struct mem_cgroup
*memcg
,
1028 static inline void mod_memcg_state(struct mem_cgroup
*memcg
,
1034 static inline void __mod_memcg_page_state(struct page
*page
,
1040 static inline void mod_memcg_page_state(struct page
*page
,
1046 static inline unsigned long lruvec_page_state(struct lruvec
*lruvec
,
1047 enum node_stat_item idx
)
1049 return node_page_state(lruvec_pgdat(lruvec
), idx
);
1052 static inline unsigned long lruvec_page_state_local(struct lruvec
*lruvec
,
1053 enum node_stat_item idx
)
1055 return node_page_state(lruvec_pgdat(lruvec
), idx
);
1058 static inline void __mod_lruvec_state(struct lruvec
*lruvec
,
1059 enum node_stat_item idx
, int val
)
1061 __mod_node_page_state(lruvec_pgdat(lruvec
), idx
, val
);
1064 static inline void mod_lruvec_state(struct lruvec
*lruvec
,
1065 enum node_stat_item idx
, int val
)
1067 mod_node_page_state(lruvec_pgdat(lruvec
), idx
, val
);
1070 static inline void __mod_lruvec_page_state(struct page
*page
,
1071 enum node_stat_item idx
, int val
)
1073 __mod_node_page_state(page_pgdat(page
), idx
, val
);
1076 static inline void mod_lruvec_page_state(struct page
*page
,
1077 enum node_stat_item idx
, int val
)
1079 mod_node_page_state(page_pgdat(page
), idx
, val
);
1083 unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t
*pgdat
, int order
,
1085 unsigned long *total_scanned
)
1090 static inline void mem_cgroup_split_huge_fixup(struct page
*head
)
1094 static inline void count_memcg_events(struct mem_cgroup
*memcg
,
1095 enum vm_event_item idx
,
1096 unsigned long count
)
1100 static inline void __count_memcg_events(struct mem_cgroup
*memcg
,
1101 enum vm_event_item idx
,
1102 unsigned long count
)
1106 static inline void count_memcg_page_event(struct page
*page
,
1112 void count_memcg_event_mm(struct mm_struct
*mm
, enum vm_event_item idx
)
1115 #endif /* CONFIG_MEMCG */
1117 /* idx can be of type enum memcg_stat_item or node_stat_item */
1118 static inline void __inc_memcg_state(struct mem_cgroup
*memcg
,
1121 __mod_memcg_state(memcg
, idx
, 1);
1124 /* idx can be of type enum memcg_stat_item or node_stat_item */
1125 static inline void __dec_memcg_state(struct mem_cgroup
*memcg
,
1128 __mod_memcg_state(memcg
, idx
, -1);
1131 /* idx can be of type enum memcg_stat_item or node_stat_item */
1132 static inline void __inc_memcg_page_state(struct page
*page
,
1135 __mod_memcg_page_state(page
, idx
, 1);
1138 /* idx can be of type enum memcg_stat_item or node_stat_item */
1139 static inline void __dec_memcg_page_state(struct page
*page
,
1142 __mod_memcg_page_state(page
, idx
, -1);
1145 static inline void __inc_lruvec_state(struct lruvec
*lruvec
,
1146 enum node_stat_item idx
)
1148 __mod_lruvec_state(lruvec
, idx
, 1);
1151 static inline void __dec_lruvec_state(struct lruvec
*lruvec
,
1152 enum node_stat_item idx
)
1154 __mod_lruvec_state(lruvec
, idx
, -1);
1157 static inline void __inc_lruvec_page_state(struct page
*page
,
1158 enum node_stat_item idx
)
1160 __mod_lruvec_page_state(page
, idx
, 1);
1163 static inline void __dec_lruvec_page_state(struct page
*page
,
1164 enum node_stat_item idx
)
1166 __mod_lruvec_page_state(page
, idx
, -1);
1169 /* idx can be of type enum memcg_stat_item or node_stat_item */
1170 static inline void inc_memcg_state(struct mem_cgroup
*memcg
,
1173 mod_memcg_state(memcg
, idx
, 1);
1176 /* idx can be of type enum memcg_stat_item or node_stat_item */
1177 static inline void dec_memcg_state(struct mem_cgroup
*memcg
,
1180 mod_memcg_state(memcg
, idx
, -1);
1183 /* idx can be of type enum memcg_stat_item or node_stat_item */
1184 static inline void inc_memcg_page_state(struct page
*page
,
1187 mod_memcg_page_state(page
, idx
, 1);
1190 /* idx can be of type enum memcg_stat_item or node_stat_item */
1191 static inline void dec_memcg_page_state(struct page
*page
,
1194 mod_memcg_page_state(page
, idx
, -1);
1197 static inline void inc_lruvec_state(struct lruvec
*lruvec
,
1198 enum node_stat_item idx
)
1200 mod_lruvec_state(lruvec
, idx
, 1);
1203 static inline void dec_lruvec_state(struct lruvec
*lruvec
,
1204 enum node_stat_item idx
)
1206 mod_lruvec_state(lruvec
, idx
, -1);
1209 static inline void inc_lruvec_page_state(struct page
*page
,
1210 enum node_stat_item idx
)
1212 mod_lruvec_page_state(page
, idx
, 1);
1215 static inline void dec_lruvec_page_state(struct page
*page
,
1216 enum node_stat_item idx
)
1218 mod_lruvec_page_state(page
, idx
, -1);
1221 #ifdef CONFIG_CGROUP_WRITEBACK
1223 struct wb_domain
*mem_cgroup_wb_domain(struct bdi_writeback
*wb
);
1224 void mem_cgroup_wb_stats(struct bdi_writeback
*wb
, unsigned long *pfilepages
,
1225 unsigned long *pheadroom
, unsigned long *pdirty
,
1226 unsigned long *pwriteback
);
1228 #else /* CONFIG_CGROUP_WRITEBACK */
1230 static inline struct wb_domain
*mem_cgroup_wb_domain(struct bdi_writeback
*wb
)
1235 static inline void mem_cgroup_wb_stats(struct bdi_writeback
*wb
,
1236 unsigned long *pfilepages
,
1237 unsigned long *pheadroom
,
1238 unsigned long *pdirty
,
1239 unsigned long *pwriteback
)
1243 #endif /* CONFIG_CGROUP_WRITEBACK */
1246 bool mem_cgroup_charge_skmem(struct mem_cgroup
*memcg
, unsigned int nr_pages
);
1247 void mem_cgroup_uncharge_skmem(struct mem_cgroup
*memcg
, unsigned int nr_pages
);
1249 extern struct static_key_false memcg_sockets_enabled_key
;
1250 #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key)
1251 void mem_cgroup_sk_alloc(struct sock
*sk
);
1252 void mem_cgroup_sk_free(struct sock
*sk
);
1253 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup
*memcg
)
1255 if (!cgroup_subsys_on_dfl(memory_cgrp_subsys
) && memcg
->tcpmem_pressure
)
1258 if (time_before(jiffies
, memcg
->socket_pressure
))
1260 } while ((memcg
= parent_mem_cgroup(memcg
)));
1264 #define mem_cgroup_sockets_enabled 0
1265 static inline void mem_cgroup_sk_alloc(struct sock
*sk
) { };
1266 static inline void mem_cgroup_sk_free(struct sock
*sk
) { };
1267 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup
*memcg
)
1273 struct kmem_cache
*memcg_kmem_get_cache(struct kmem_cache
*cachep
);
1274 void memcg_kmem_put_cache(struct kmem_cache
*cachep
);
1276 #ifdef CONFIG_MEMCG_KMEM
1277 int __memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
);
1278 void __memcg_kmem_uncharge(struct page
*page
, int order
);
1279 int __memcg_kmem_charge_memcg(struct page
*page
, gfp_t gfp
, int order
,
1280 struct mem_cgroup
*memcg
);
1282 extern struct static_key_false memcg_kmem_enabled_key
;
1283 extern struct workqueue_struct
*memcg_kmem_cache_wq
;
1285 extern int memcg_nr_cache_ids
;
1286 void memcg_get_cache_ids(void);
1287 void memcg_put_cache_ids(void);
1290 * Helper macro to loop through all memcg-specific caches. Callers must still
1291 * check if the cache is valid (it is either valid or NULL).
1292 * the slab_mutex must be held when looping through those caches
1294 #define for_each_memcg_cache_index(_idx) \
1295 for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++)
1297 static inline bool memcg_kmem_enabled(void)
1299 return static_branch_unlikely(&memcg_kmem_enabled_key
);
1302 static inline int memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
)
1304 if (memcg_kmem_enabled())
1305 return __memcg_kmem_charge(page
, gfp
, order
);
1309 static inline void memcg_kmem_uncharge(struct page
*page
, int order
)
1311 if (memcg_kmem_enabled())
1312 __memcg_kmem_uncharge(page
, order
);
1315 static inline int memcg_kmem_charge_memcg(struct page
*page
, gfp_t gfp
,
1316 int order
, struct mem_cgroup
*memcg
)
1318 if (memcg_kmem_enabled())
1319 return __memcg_kmem_charge_memcg(page
, gfp
, order
, memcg
);
1323 * helper for accessing a memcg's index. It will be used as an index in the
1324 * child cache array in kmem_cache, and also to derive its name. This function
1325 * will return -1 when this is not a kmem-limited memcg.
1327 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
1329 return memcg
? memcg
->kmemcg_id
: -1;
1332 extern int memcg_expand_shrinker_maps(int new_id
);
1334 extern void memcg_set_shrinker_bit(struct mem_cgroup
*memcg
,
1335 int nid
, int shrinker_id
);
1338 static inline int memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
)
1343 static inline void memcg_kmem_uncharge(struct page
*page
, int order
)
1347 static inline int __memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
)
1352 static inline void __memcg_kmem_uncharge(struct page
*page
, int order
)
1356 #define for_each_memcg_cache_index(_idx) \
1359 static inline bool memcg_kmem_enabled(void)
1364 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
1369 static inline void memcg_get_cache_ids(void)
1373 static inline void memcg_put_cache_ids(void)
1377 static inline void memcg_set_shrinker_bit(struct mem_cgroup
*memcg
,
1378 int nid
, int shrinker_id
) { }
1379 #endif /* CONFIG_MEMCG_KMEM */
1381 #endif /* _LINUX_MEMCONTROL_H */