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 struct memcg_shrinker_map __rcu
*shrinker_map
;
133 struct rb_node tree_node
; /* RB tree node */
134 unsigned long usage_in_excess
;/* Set to the value by which */
135 /* the soft limit is exceeded*/
137 bool congested
; /* memcg has many dirty pages */
138 /* backed by a congested BDI */
140 struct mem_cgroup
*memcg
; /* Back pointer, we cannot */
141 /* use container_of */
144 struct mem_cgroup_threshold
{
145 struct eventfd_ctx
*eventfd
;
146 unsigned long threshold
;
150 struct mem_cgroup_threshold_ary
{
151 /* An array index points to threshold just below or equal to usage. */
152 int current_threshold
;
153 /* Size of entries[] */
155 /* Array of thresholds */
156 struct mem_cgroup_threshold entries
[0];
159 struct mem_cgroup_thresholds
{
160 /* Primary thresholds array */
161 struct mem_cgroup_threshold_ary
*primary
;
163 * Spare threshold array.
164 * This is needed to make mem_cgroup_unregister_event() "never fail".
165 * It must be able to store at least primary->size - 1 entries.
167 struct mem_cgroup_threshold_ary
*spare
;
170 enum memcg_kmem_state
{
176 #if defined(CONFIG_SMP)
177 struct memcg_padding
{
179 } ____cacheline_internodealigned_in_smp
;
180 #define MEMCG_PADDING(name) struct memcg_padding name;
182 #define MEMCG_PADDING(name)
186 * Remember four most recent foreign writebacks with dirty pages in this
187 * cgroup. Inode sharing is expected to be uncommon and, even if we miss
188 * one in a given round, we're likely to catch it later if it keeps
189 * foreign-dirtying, so a fairly low count should be enough.
191 * See mem_cgroup_track_foreign_dirty_slowpath() for details.
193 #define MEMCG_CGWB_FRN_CNT 4
195 struct memcg_cgwb_frn
{
196 u64 bdi_id
; /* bdi->id of the foreign inode */
197 int memcg_id
; /* memcg->css.id of foreign inode */
198 u64 at
; /* jiffies_64 at the time of dirtying */
199 struct wb_completion done
; /* tracks in-flight foreign writebacks */
203 * The memory controller data structure. The memory controller controls both
204 * page cache and RSS per cgroup. We would eventually like to provide
205 * statistics based on the statistics developed by Rik Van Riel for clock-pro,
206 * to help the administrator determine what knobs to tune.
209 struct cgroup_subsys_state css
;
211 /* Private memcg ID. Used to ID objects that outlive the cgroup */
212 struct mem_cgroup_id id
;
214 /* Accounted resources */
215 struct page_counter memory
;
216 struct page_counter swap
;
218 /* Legacy consumer-oriented counters */
219 struct page_counter memsw
;
220 struct page_counter kmem
;
221 struct page_counter tcpmem
;
223 /* Upper bound of normal memory consumption range */
226 /* Range enforcement for interrupt charges */
227 struct work_struct high_work
;
229 unsigned long soft_limit
;
231 /* vmpressure notifications */
232 struct vmpressure vmpressure
;
235 * Should the accounting and control be hierarchical, per subtree?
240 * Should the OOM killer kill all belonging tasks, had it kill one?
244 /* protected by memcg_oom_lock */
249 /* OOM-Killer disable */
250 int oom_kill_disable
;
252 /* memory.events and memory.events.local */
253 struct cgroup_file events_file
;
254 struct cgroup_file events_local_file
;
256 /* handle for "memory.swap.events" */
257 struct cgroup_file swap_events_file
;
259 /* protect arrays of thresholds */
260 struct mutex thresholds_lock
;
262 /* thresholds for memory usage. RCU-protected */
263 struct mem_cgroup_thresholds thresholds
;
265 /* thresholds for mem+swap usage. RCU-protected */
266 struct mem_cgroup_thresholds memsw_thresholds
;
268 /* For oom notifier event fd */
269 struct list_head oom_notify
;
272 * Should we move charges of a task when a task is moved into this
273 * mem_cgroup ? And what type of charges should we move ?
275 unsigned long move_charge_at_immigrate
;
276 /* taken only while moving_account > 0 */
277 spinlock_t move_lock
;
278 unsigned long move_lock_flags
;
280 MEMCG_PADDING(_pad1_
);
283 * set > 0 if pages under this cgroup are moving to other cgroup.
285 atomic_t moving_account
;
286 struct task_struct
*move_lock_task
;
288 /* Legacy local VM stats and events */
289 struct memcg_vmstats_percpu __percpu
*vmstats_local
;
291 /* Subtree VM stats and events (batched updates) */
292 struct memcg_vmstats_percpu __percpu
*vmstats_percpu
;
294 MEMCG_PADDING(_pad2_
);
296 atomic_long_t vmstats
[MEMCG_NR_STAT
];
297 atomic_long_t vmevents
[NR_VM_EVENT_ITEMS
];
300 atomic_long_t memory_events
[MEMCG_NR_MEMORY_EVENTS
];
301 atomic_long_t memory_events_local
[MEMCG_NR_MEMORY_EVENTS
];
303 unsigned long socket_pressure
;
305 /* Legacy tcp memory accounting */
309 #ifdef CONFIG_MEMCG_KMEM
310 /* Index in the kmem_cache->memcg_params.memcg_caches array */
312 enum memcg_kmem_state kmem_state
;
313 struct list_head kmem_caches
;
316 int last_scanned_node
;
318 nodemask_t scan_nodes
;
319 atomic_t numainfo_events
;
320 atomic_t numainfo_updating
;
323 #ifdef CONFIG_CGROUP_WRITEBACK
324 struct list_head cgwb_list
;
325 struct wb_domain cgwb_domain
;
326 struct memcg_cgwb_frn cgwb_frn
[MEMCG_CGWB_FRN_CNT
];
329 /* List of events which userspace want to receive */
330 struct list_head event_list
;
331 spinlock_t event_list_lock
;
333 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
334 struct deferred_split deferred_split_queue
;
337 struct mem_cgroup_per_node
*nodeinfo
[0];
338 /* WARNING: nodeinfo must be the last member here */
342 * size of first charge trial. "32" comes from vmscan.c's magic value.
343 * TODO: maybe necessary to use big numbers in big irons.
345 #define MEMCG_CHARGE_BATCH 32U
347 extern struct mem_cgroup
*root_mem_cgroup
;
349 static inline bool mem_cgroup_is_root(struct mem_cgroup
*memcg
)
351 return (memcg
== root_mem_cgroup
);
354 static inline bool mem_cgroup_disabled(void)
356 return !cgroup_subsys_enabled(memory_cgrp_subsys
);
359 static inline unsigned long mem_cgroup_protection(struct mem_cgroup
*memcg
,
362 if (mem_cgroup_disabled())
366 return READ_ONCE(memcg
->memory
.emin
);
368 return max(READ_ONCE(memcg
->memory
.emin
),
369 READ_ONCE(memcg
->memory
.elow
));
372 enum mem_cgroup_protection
mem_cgroup_protected(struct mem_cgroup
*root
,
373 struct mem_cgroup
*memcg
);
375 int mem_cgroup_try_charge(struct page
*page
, struct mm_struct
*mm
,
376 gfp_t gfp_mask
, struct mem_cgroup
**memcgp
,
378 int mem_cgroup_try_charge_delay(struct page
*page
, struct mm_struct
*mm
,
379 gfp_t gfp_mask
, struct mem_cgroup
**memcgp
,
381 void mem_cgroup_commit_charge(struct page
*page
, struct mem_cgroup
*memcg
,
382 bool lrucare
, bool compound
);
383 void mem_cgroup_cancel_charge(struct page
*page
, struct mem_cgroup
*memcg
,
385 void mem_cgroup_uncharge(struct page
*page
);
386 void mem_cgroup_uncharge_list(struct list_head
*page_list
);
388 void mem_cgroup_migrate(struct page
*oldpage
, struct page
*newpage
);
390 static struct mem_cgroup_per_node
*
391 mem_cgroup_nodeinfo(struct mem_cgroup
*memcg
, int nid
)
393 return memcg
->nodeinfo
[nid
];
397 * mem_cgroup_lruvec - get the lru list vector for a node or a memcg zone
398 * @node: node of the wanted lruvec
399 * @memcg: memcg of the wanted lruvec
401 * Returns the lru list vector holding pages for a given @node or a given
402 * @memcg and @zone. This can be the node lruvec, if the memory controller
405 static inline struct lruvec
*mem_cgroup_lruvec(struct pglist_data
*pgdat
,
406 struct mem_cgroup
*memcg
)
408 struct mem_cgroup_per_node
*mz
;
409 struct lruvec
*lruvec
;
411 if (mem_cgroup_disabled()) {
412 lruvec
= node_lruvec(pgdat
);
416 mz
= mem_cgroup_nodeinfo(memcg
, pgdat
->node_id
);
417 lruvec
= &mz
->lruvec
;
420 * Since a node can be onlined after the mem_cgroup was created,
421 * we have to be prepared to initialize lruvec->pgdat here;
422 * and if offlined then reonlined, we need to reinitialize it.
424 if (unlikely(lruvec
->pgdat
!= pgdat
))
425 lruvec
->pgdat
= pgdat
;
429 struct lruvec
*mem_cgroup_page_lruvec(struct page
*, struct pglist_data
*);
431 struct mem_cgroup
*mem_cgroup_from_task(struct task_struct
*p
);
433 struct mem_cgroup
*get_mem_cgroup_from_mm(struct mm_struct
*mm
);
435 struct mem_cgroup
*get_mem_cgroup_from_page(struct page
*page
);
438 struct mem_cgroup
*mem_cgroup_from_css(struct cgroup_subsys_state
*css
){
439 return css
? container_of(css
, struct mem_cgroup
, css
) : NULL
;
442 static inline void mem_cgroup_put(struct mem_cgroup
*memcg
)
445 css_put(&memcg
->css
);
448 #define mem_cgroup_from_counter(counter, member) \
449 container_of(counter, struct mem_cgroup, member)
451 struct mem_cgroup
*mem_cgroup_iter(struct mem_cgroup
*,
453 struct mem_cgroup_reclaim_cookie
*);
454 void mem_cgroup_iter_break(struct mem_cgroup
*, struct mem_cgroup
*);
455 int mem_cgroup_scan_tasks(struct mem_cgroup
*,
456 int (*)(struct task_struct
*, void *), void *);
458 static inline unsigned short mem_cgroup_id(struct mem_cgroup
*memcg
)
460 if (mem_cgroup_disabled())
465 struct mem_cgroup
*mem_cgroup_from_id(unsigned short id
);
467 static inline struct mem_cgroup
*mem_cgroup_from_seq(struct seq_file
*m
)
469 return mem_cgroup_from_css(seq_css(m
));
472 static inline struct mem_cgroup
*lruvec_memcg(struct lruvec
*lruvec
)
474 struct mem_cgroup_per_node
*mz
;
476 if (mem_cgroup_disabled())
479 mz
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
484 * parent_mem_cgroup - find the accounting parent of a memcg
485 * @memcg: memcg whose parent to find
487 * Returns the parent memcg, or NULL if this is the root or the memory
488 * controller is in legacy no-hierarchy mode.
490 static inline struct mem_cgroup
*parent_mem_cgroup(struct mem_cgroup
*memcg
)
492 if (!memcg
->memory
.parent
)
494 return mem_cgroup_from_counter(memcg
->memory
.parent
, memory
);
497 static inline bool mem_cgroup_is_descendant(struct mem_cgroup
*memcg
,
498 struct mem_cgroup
*root
)
502 if (!root
->use_hierarchy
)
504 return cgroup_is_descendant(memcg
->css
.cgroup
, root
->css
.cgroup
);
507 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
508 struct mem_cgroup
*memcg
)
510 struct mem_cgroup
*task_memcg
;
514 task_memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
516 match
= mem_cgroup_is_descendant(task_memcg
, memcg
);
521 struct cgroup_subsys_state
*mem_cgroup_css_from_page(struct page
*page
);
522 ino_t
page_cgroup_ino(struct page
*page
);
524 static inline bool mem_cgroup_online(struct mem_cgroup
*memcg
)
526 if (mem_cgroup_disabled())
528 return !!(memcg
->css
.flags
& CSS_ONLINE
);
532 * For memory reclaim.
534 int mem_cgroup_select_victim_node(struct mem_cgroup
*memcg
);
536 void mem_cgroup_update_lru_size(struct lruvec
*lruvec
, enum lru_list lru
,
537 int zid
, int nr_pages
);
540 unsigned long mem_cgroup_get_zone_lru_size(struct lruvec
*lruvec
,
541 enum lru_list lru
, int zone_idx
)
543 struct mem_cgroup_per_node
*mz
;
545 mz
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
546 return mz
->lru_zone_size
[zone_idx
][lru
];
549 void mem_cgroup_handle_over_high(void);
551 unsigned long mem_cgroup_get_max(struct mem_cgroup
*memcg
);
553 unsigned long mem_cgroup_size(struct mem_cgroup
*memcg
);
555 void mem_cgroup_print_oom_context(struct mem_cgroup
*memcg
,
556 struct task_struct
*p
);
558 void mem_cgroup_print_oom_meminfo(struct mem_cgroup
*memcg
);
560 static inline void mem_cgroup_enter_user_fault(void)
562 WARN_ON(current
->in_user_fault
);
563 current
->in_user_fault
= 1;
566 static inline void mem_cgroup_exit_user_fault(void)
568 WARN_ON(!current
->in_user_fault
);
569 current
->in_user_fault
= 0;
572 static inline bool task_in_memcg_oom(struct task_struct
*p
)
574 return p
->memcg_in_oom
;
577 bool mem_cgroup_oom_synchronize(bool wait
);
578 struct mem_cgroup
*mem_cgroup_get_oom_group(struct task_struct
*victim
,
579 struct mem_cgroup
*oom_domain
);
580 void mem_cgroup_print_oom_group(struct mem_cgroup
*memcg
);
582 #ifdef CONFIG_MEMCG_SWAP
583 extern int do_swap_account
;
586 struct mem_cgroup
*lock_page_memcg(struct page
*page
);
587 void __unlock_page_memcg(struct mem_cgroup
*memcg
);
588 void unlock_page_memcg(struct page
*page
);
591 * idx can be of type enum memcg_stat_item or node_stat_item.
592 * Keep in sync with memcg_exact_page_state().
594 static inline unsigned long memcg_page_state(struct mem_cgroup
*memcg
, int idx
)
596 long x
= atomic_long_read(&memcg
->vmstats
[idx
]);
605 * idx can be of type enum memcg_stat_item or node_stat_item.
606 * Keep in sync with memcg_exact_page_state().
608 static inline unsigned long memcg_page_state_local(struct mem_cgroup
*memcg
,
614 for_each_possible_cpu(cpu
)
615 x
+= per_cpu(memcg
->vmstats_local
->stat
[idx
], cpu
);
623 void __mod_memcg_state(struct mem_cgroup
*memcg
, int idx
, int val
);
625 /* idx can be of type enum memcg_stat_item or node_stat_item */
626 static inline void mod_memcg_state(struct mem_cgroup
*memcg
,
631 local_irq_save(flags
);
632 __mod_memcg_state(memcg
, idx
, val
);
633 local_irq_restore(flags
);
637 * mod_memcg_page_state - update page state statistics
639 * @idx: page state item to account
640 * @val: number of pages (positive or negative)
642 * The @page must be locked or the caller must use lock_page_memcg()
643 * to prevent double accounting when the page is concurrently being
644 * moved to another memcg:
646 * lock_page(page) or lock_page_memcg(page)
647 * if (TestClearPageState(page))
648 * mod_memcg_page_state(page, state, -1);
649 * unlock_page(page) or unlock_page_memcg(page)
651 * Kernel pages are an exception to this, since they'll never move.
653 static inline void __mod_memcg_page_state(struct page
*page
,
656 if (page
->mem_cgroup
)
657 __mod_memcg_state(page
->mem_cgroup
, idx
, val
);
660 static inline void mod_memcg_page_state(struct page
*page
,
663 if (page
->mem_cgroup
)
664 mod_memcg_state(page
->mem_cgroup
, idx
, val
);
667 static inline unsigned long lruvec_page_state(struct lruvec
*lruvec
,
668 enum node_stat_item idx
)
670 struct mem_cgroup_per_node
*pn
;
673 if (mem_cgroup_disabled())
674 return node_page_state(lruvec_pgdat(lruvec
), idx
);
676 pn
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
677 x
= atomic_long_read(&pn
->lruvec_stat
[idx
]);
685 static inline unsigned long lruvec_page_state_local(struct lruvec
*lruvec
,
686 enum node_stat_item idx
)
688 struct mem_cgroup_per_node
*pn
;
692 if (mem_cgroup_disabled())
693 return node_page_state(lruvec_pgdat(lruvec
), idx
);
695 pn
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
696 for_each_possible_cpu(cpu
)
697 x
+= per_cpu(pn
->lruvec_stat_local
->count
[idx
], cpu
);
705 void __mod_lruvec_state(struct lruvec
*lruvec
, enum node_stat_item idx
,
707 void __mod_lruvec_slab_state(void *p
, enum node_stat_item idx
, int val
);
709 static inline void mod_lruvec_state(struct lruvec
*lruvec
,
710 enum node_stat_item idx
, int val
)
714 local_irq_save(flags
);
715 __mod_lruvec_state(lruvec
, idx
, val
);
716 local_irq_restore(flags
);
719 static inline void __mod_lruvec_page_state(struct page
*page
,
720 enum node_stat_item idx
, int val
)
722 pg_data_t
*pgdat
= page_pgdat(page
);
723 struct lruvec
*lruvec
;
725 /* Untracked pages have no memcg, no lruvec. Update only the node */
726 if (!page
->mem_cgroup
) {
727 __mod_node_page_state(pgdat
, idx
, val
);
731 lruvec
= mem_cgroup_lruvec(pgdat
, page
->mem_cgroup
);
732 __mod_lruvec_state(lruvec
, idx
, val
);
735 static inline void mod_lruvec_page_state(struct page
*page
,
736 enum node_stat_item idx
, int val
)
740 local_irq_save(flags
);
741 __mod_lruvec_page_state(page
, idx
, val
);
742 local_irq_restore(flags
);
745 unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t
*pgdat
, int order
,
747 unsigned long *total_scanned
);
749 void __count_memcg_events(struct mem_cgroup
*memcg
, enum vm_event_item idx
,
750 unsigned long count
);
752 static inline void count_memcg_events(struct mem_cgroup
*memcg
,
753 enum vm_event_item idx
,
758 local_irq_save(flags
);
759 __count_memcg_events(memcg
, idx
, count
);
760 local_irq_restore(flags
);
763 static inline void count_memcg_page_event(struct page
*page
,
764 enum vm_event_item idx
)
766 if (page
->mem_cgroup
)
767 count_memcg_events(page
->mem_cgroup
, idx
, 1);
770 static inline void count_memcg_event_mm(struct mm_struct
*mm
,
771 enum vm_event_item idx
)
773 struct mem_cgroup
*memcg
;
775 if (mem_cgroup_disabled())
779 memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
781 count_memcg_events(memcg
, idx
, 1);
785 static inline void memcg_memory_event(struct mem_cgroup
*memcg
,
786 enum memcg_memory_event event
)
788 atomic_long_inc(&memcg
->memory_events_local
[event
]);
789 cgroup_file_notify(&memcg
->events_local_file
);
792 atomic_long_inc(&memcg
->memory_events
[event
]);
793 cgroup_file_notify(&memcg
->events_file
);
795 if (cgrp_dfl_root
.flags
& CGRP_ROOT_MEMORY_LOCAL_EVENTS
)
797 } while ((memcg
= parent_mem_cgroup(memcg
)) &&
798 !mem_cgroup_is_root(memcg
));
801 static inline void memcg_memory_event_mm(struct mm_struct
*mm
,
802 enum memcg_memory_event event
)
804 struct mem_cgroup
*memcg
;
806 if (mem_cgroup_disabled())
810 memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
812 memcg_memory_event(memcg
, event
);
816 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
817 void mem_cgroup_split_huge_fixup(struct page
*head
);
820 #else /* CONFIG_MEMCG */
822 #define MEM_CGROUP_ID_SHIFT 0
823 #define MEM_CGROUP_ID_MAX 0
827 static inline bool mem_cgroup_is_root(struct mem_cgroup
*memcg
)
832 static inline bool mem_cgroup_disabled(void)
837 static inline void memcg_memory_event(struct mem_cgroup
*memcg
,
838 enum memcg_memory_event event
)
842 static inline void memcg_memory_event_mm(struct mm_struct
*mm
,
843 enum memcg_memory_event event
)
847 static inline unsigned long mem_cgroup_protection(struct mem_cgroup
*memcg
,
853 static inline enum mem_cgroup_protection
mem_cgroup_protected(
854 struct mem_cgroup
*root
, struct mem_cgroup
*memcg
)
856 return MEMCG_PROT_NONE
;
859 static inline int mem_cgroup_try_charge(struct page
*page
, struct mm_struct
*mm
,
861 struct mem_cgroup
**memcgp
,
868 static inline int mem_cgroup_try_charge_delay(struct page
*page
,
869 struct mm_struct
*mm
,
871 struct mem_cgroup
**memcgp
,
878 static inline void mem_cgroup_commit_charge(struct page
*page
,
879 struct mem_cgroup
*memcg
,
880 bool lrucare
, bool compound
)
884 static inline void mem_cgroup_cancel_charge(struct page
*page
,
885 struct mem_cgroup
*memcg
,
890 static inline void mem_cgroup_uncharge(struct page
*page
)
894 static inline void mem_cgroup_uncharge_list(struct list_head
*page_list
)
898 static inline void mem_cgroup_migrate(struct page
*old
, struct page
*new)
902 static inline struct lruvec
*mem_cgroup_lruvec(struct pglist_data
*pgdat
,
903 struct mem_cgroup
*memcg
)
905 return node_lruvec(pgdat
);
908 static inline struct lruvec
*mem_cgroup_page_lruvec(struct page
*page
,
909 struct pglist_data
*pgdat
)
911 return &pgdat
->lruvec
;
914 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
915 struct mem_cgroup
*memcg
)
920 static inline struct mem_cgroup
*get_mem_cgroup_from_mm(struct mm_struct
*mm
)
925 static inline struct mem_cgroup
*get_mem_cgroup_from_page(struct page
*page
)
930 static inline void mem_cgroup_put(struct mem_cgroup
*memcg
)
934 static inline struct mem_cgroup
*
935 mem_cgroup_iter(struct mem_cgroup
*root
,
936 struct mem_cgroup
*prev
,
937 struct mem_cgroup_reclaim_cookie
*reclaim
)
942 static inline void mem_cgroup_iter_break(struct mem_cgroup
*root
,
943 struct mem_cgroup
*prev
)
947 static inline int mem_cgroup_scan_tasks(struct mem_cgroup
*memcg
,
948 int (*fn
)(struct task_struct
*, void *), void *arg
)
953 static inline unsigned short mem_cgroup_id(struct mem_cgroup
*memcg
)
958 static inline struct mem_cgroup
*mem_cgroup_from_id(unsigned short id
)
961 /* XXX: This should always return root_mem_cgroup */
965 static inline struct mem_cgroup
*mem_cgroup_from_seq(struct seq_file
*m
)
970 static inline struct mem_cgroup
*lruvec_memcg(struct lruvec
*lruvec
)
975 static inline bool mem_cgroup_online(struct mem_cgroup
*memcg
)
981 unsigned long mem_cgroup_get_zone_lru_size(struct lruvec
*lruvec
,
982 enum lru_list lru
, int zone_idx
)
987 static inline unsigned long mem_cgroup_get_max(struct mem_cgroup
*memcg
)
992 static inline unsigned long mem_cgroup_size(struct mem_cgroup
*memcg
)
998 mem_cgroup_print_oom_context(struct mem_cgroup
*memcg
, struct task_struct
*p
)
1003 mem_cgroup_print_oom_meminfo(struct mem_cgroup
*memcg
)
1007 static inline struct mem_cgroup
*lock_page_memcg(struct page
*page
)
1012 static inline void __unlock_page_memcg(struct mem_cgroup
*memcg
)
1016 static inline void unlock_page_memcg(struct page
*page
)
1020 static inline void mem_cgroup_handle_over_high(void)
1024 static inline void mem_cgroup_enter_user_fault(void)
1028 static inline void mem_cgroup_exit_user_fault(void)
1032 static inline bool task_in_memcg_oom(struct task_struct
*p
)
1037 static inline bool mem_cgroup_oom_synchronize(bool wait
)
1042 static inline struct mem_cgroup
*mem_cgroup_get_oom_group(
1043 struct task_struct
*victim
, struct mem_cgroup
*oom_domain
)
1048 static inline void mem_cgroup_print_oom_group(struct mem_cgroup
*memcg
)
1052 static inline unsigned long memcg_page_state(struct mem_cgroup
*memcg
, int idx
)
1057 static inline unsigned long memcg_page_state_local(struct mem_cgroup
*memcg
,
1063 static inline void __mod_memcg_state(struct mem_cgroup
*memcg
,
1069 static inline void mod_memcg_state(struct mem_cgroup
*memcg
,
1075 static inline void __mod_memcg_page_state(struct page
*page
,
1081 static inline void mod_memcg_page_state(struct page
*page
,
1087 static inline unsigned long lruvec_page_state(struct lruvec
*lruvec
,
1088 enum node_stat_item idx
)
1090 return node_page_state(lruvec_pgdat(lruvec
), idx
);
1093 static inline unsigned long lruvec_page_state_local(struct lruvec
*lruvec
,
1094 enum node_stat_item idx
)
1096 return node_page_state(lruvec_pgdat(lruvec
), idx
);
1099 static inline void __mod_lruvec_state(struct lruvec
*lruvec
,
1100 enum node_stat_item idx
, int val
)
1102 __mod_node_page_state(lruvec_pgdat(lruvec
), idx
, val
);
1105 static inline void mod_lruvec_state(struct lruvec
*lruvec
,
1106 enum node_stat_item idx
, int val
)
1108 mod_node_page_state(lruvec_pgdat(lruvec
), idx
, val
);
1111 static inline void __mod_lruvec_page_state(struct page
*page
,
1112 enum node_stat_item idx
, int val
)
1114 __mod_node_page_state(page_pgdat(page
), idx
, val
);
1117 static inline void mod_lruvec_page_state(struct page
*page
,
1118 enum node_stat_item idx
, int val
)
1120 mod_node_page_state(page_pgdat(page
), idx
, val
);
1123 static inline void __mod_lruvec_slab_state(void *p
, enum node_stat_item idx
,
1126 struct page
*page
= virt_to_head_page(p
);
1128 __mod_node_page_state(page_pgdat(page
), idx
, val
);
1132 unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t
*pgdat
, int order
,
1134 unsigned long *total_scanned
)
1139 static inline void mem_cgroup_split_huge_fixup(struct page
*head
)
1143 static inline void count_memcg_events(struct mem_cgroup
*memcg
,
1144 enum vm_event_item idx
,
1145 unsigned long count
)
1149 static inline void __count_memcg_events(struct mem_cgroup
*memcg
,
1150 enum vm_event_item idx
,
1151 unsigned long count
)
1155 static inline void count_memcg_page_event(struct page
*page
,
1161 void count_memcg_event_mm(struct mm_struct
*mm
, enum vm_event_item idx
)
1164 #endif /* CONFIG_MEMCG */
1166 /* idx can be of type enum memcg_stat_item or node_stat_item */
1167 static inline void __inc_memcg_state(struct mem_cgroup
*memcg
,
1170 __mod_memcg_state(memcg
, idx
, 1);
1173 /* idx can be of type enum memcg_stat_item or node_stat_item */
1174 static inline void __dec_memcg_state(struct mem_cgroup
*memcg
,
1177 __mod_memcg_state(memcg
, idx
, -1);
1180 /* idx can be of type enum memcg_stat_item or node_stat_item */
1181 static inline void __inc_memcg_page_state(struct page
*page
,
1184 __mod_memcg_page_state(page
, idx
, 1);
1187 /* idx can be of type enum memcg_stat_item or node_stat_item */
1188 static inline void __dec_memcg_page_state(struct page
*page
,
1191 __mod_memcg_page_state(page
, idx
, -1);
1194 static inline void __inc_lruvec_state(struct lruvec
*lruvec
,
1195 enum node_stat_item idx
)
1197 __mod_lruvec_state(lruvec
, idx
, 1);
1200 static inline void __dec_lruvec_state(struct lruvec
*lruvec
,
1201 enum node_stat_item idx
)
1203 __mod_lruvec_state(lruvec
, idx
, -1);
1206 static inline void __inc_lruvec_page_state(struct page
*page
,
1207 enum node_stat_item idx
)
1209 __mod_lruvec_page_state(page
, idx
, 1);
1212 static inline void __dec_lruvec_page_state(struct page
*page
,
1213 enum node_stat_item idx
)
1215 __mod_lruvec_page_state(page
, idx
, -1);
1218 static inline void __inc_lruvec_slab_state(void *p
, enum node_stat_item idx
)
1220 __mod_lruvec_slab_state(p
, idx
, 1);
1223 static inline void __dec_lruvec_slab_state(void *p
, enum node_stat_item idx
)
1225 __mod_lruvec_slab_state(p
, idx
, -1);
1228 /* idx can be of type enum memcg_stat_item or node_stat_item */
1229 static inline void inc_memcg_state(struct mem_cgroup
*memcg
,
1232 mod_memcg_state(memcg
, idx
, 1);
1235 /* idx can be of type enum memcg_stat_item or node_stat_item */
1236 static inline void dec_memcg_state(struct mem_cgroup
*memcg
,
1239 mod_memcg_state(memcg
, idx
, -1);
1242 /* idx can be of type enum memcg_stat_item or node_stat_item */
1243 static inline void inc_memcg_page_state(struct page
*page
,
1246 mod_memcg_page_state(page
, idx
, 1);
1249 /* idx can be of type enum memcg_stat_item or node_stat_item */
1250 static inline void dec_memcg_page_state(struct page
*page
,
1253 mod_memcg_page_state(page
, idx
, -1);
1256 static inline void inc_lruvec_state(struct lruvec
*lruvec
,
1257 enum node_stat_item idx
)
1259 mod_lruvec_state(lruvec
, idx
, 1);
1262 static inline void dec_lruvec_state(struct lruvec
*lruvec
,
1263 enum node_stat_item idx
)
1265 mod_lruvec_state(lruvec
, idx
, -1);
1268 static inline void inc_lruvec_page_state(struct page
*page
,
1269 enum node_stat_item idx
)
1271 mod_lruvec_page_state(page
, idx
, 1);
1274 static inline void dec_lruvec_page_state(struct page
*page
,
1275 enum node_stat_item idx
)
1277 mod_lruvec_page_state(page
, idx
, -1);
1280 #ifdef CONFIG_CGROUP_WRITEBACK
1282 struct wb_domain
*mem_cgroup_wb_domain(struct bdi_writeback
*wb
);
1283 void mem_cgroup_wb_stats(struct bdi_writeback
*wb
, unsigned long *pfilepages
,
1284 unsigned long *pheadroom
, unsigned long *pdirty
,
1285 unsigned long *pwriteback
);
1287 void mem_cgroup_track_foreign_dirty_slowpath(struct page
*page
,
1288 struct bdi_writeback
*wb
);
1290 static inline void mem_cgroup_track_foreign_dirty(struct page
*page
,
1291 struct bdi_writeback
*wb
)
1293 if (mem_cgroup_disabled())
1296 if (unlikely(&page
->mem_cgroup
->css
!= wb
->memcg_css
))
1297 mem_cgroup_track_foreign_dirty_slowpath(page
, wb
);
1300 void mem_cgroup_flush_foreign(struct bdi_writeback
*wb
);
1302 #else /* CONFIG_CGROUP_WRITEBACK */
1304 static inline struct wb_domain
*mem_cgroup_wb_domain(struct bdi_writeback
*wb
)
1309 static inline void mem_cgroup_wb_stats(struct bdi_writeback
*wb
,
1310 unsigned long *pfilepages
,
1311 unsigned long *pheadroom
,
1312 unsigned long *pdirty
,
1313 unsigned long *pwriteback
)
1317 static inline void mem_cgroup_track_foreign_dirty(struct page
*page
,
1318 struct bdi_writeback
*wb
)
1322 static inline void mem_cgroup_flush_foreign(struct bdi_writeback
*wb
)
1326 #endif /* CONFIG_CGROUP_WRITEBACK */
1329 bool mem_cgroup_charge_skmem(struct mem_cgroup
*memcg
, unsigned int nr_pages
);
1330 void mem_cgroup_uncharge_skmem(struct mem_cgroup
*memcg
, unsigned int nr_pages
);
1332 extern struct static_key_false memcg_sockets_enabled_key
;
1333 #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key)
1334 void mem_cgroup_sk_alloc(struct sock
*sk
);
1335 void mem_cgroup_sk_free(struct sock
*sk
);
1336 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup
*memcg
)
1338 if (!cgroup_subsys_on_dfl(memory_cgrp_subsys
) && memcg
->tcpmem_pressure
)
1341 if (time_before(jiffies
, memcg
->socket_pressure
))
1343 } while ((memcg
= parent_mem_cgroup(memcg
)));
1347 extern int memcg_expand_shrinker_maps(int new_id
);
1349 extern void memcg_set_shrinker_bit(struct mem_cgroup
*memcg
,
1350 int nid
, int shrinker_id
);
1352 #define mem_cgroup_sockets_enabled 0
1353 static inline void mem_cgroup_sk_alloc(struct sock
*sk
) { };
1354 static inline void mem_cgroup_sk_free(struct sock
*sk
) { };
1355 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup
*memcg
)
1360 static inline void memcg_set_shrinker_bit(struct mem_cgroup
*memcg
,
1361 int nid
, int shrinker_id
)
1366 struct kmem_cache
*memcg_kmem_get_cache(struct kmem_cache
*cachep
);
1367 void memcg_kmem_put_cache(struct kmem_cache
*cachep
);
1369 #ifdef CONFIG_MEMCG_KMEM
1370 int __memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
);
1371 void __memcg_kmem_uncharge(struct page
*page
, int order
);
1372 int __memcg_kmem_charge_memcg(struct page
*page
, gfp_t gfp
, int order
,
1373 struct mem_cgroup
*memcg
);
1374 void __memcg_kmem_uncharge_memcg(struct mem_cgroup
*memcg
,
1375 unsigned int nr_pages
);
1377 extern struct static_key_false memcg_kmem_enabled_key
;
1378 extern struct workqueue_struct
*memcg_kmem_cache_wq
;
1380 extern int memcg_nr_cache_ids
;
1381 void memcg_get_cache_ids(void);
1382 void memcg_put_cache_ids(void);
1385 * Helper macro to loop through all memcg-specific caches. Callers must still
1386 * check if the cache is valid (it is either valid or NULL).
1387 * the slab_mutex must be held when looping through those caches
1389 #define for_each_memcg_cache_index(_idx) \
1390 for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++)
1392 static inline bool memcg_kmem_enabled(void)
1394 return static_branch_unlikely(&memcg_kmem_enabled_key
);
1397 static inline int memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
)
1399 if (memcg_kmem_enabled())
1400 return __memcg_kmem_charge(page
, gfp
, order
);
1404 static inline void memcg_kmem_uncharge(struct page
*page
, int order
)
1406 if (memcg_kmem_enabled())
1407 __memcg_kmem_uncharge(page
, order
);
1410 static inline int memcg_kmem_charge_memcg(struct page
*page
, gfp_t gfp
,
1411 int order
, struct mem_cgroup
*memcg
)
1413 if (memcg_kmem_enabled())
1414 return __memcg_kmem_charge_memcg(page
, gfp
, order
, memcg
);
1418 static inline void memcg_kmem_uncharge_memcg(struct page
*page
, int order
,
1419 struct mem_cgroup
*memcg
)
1421 if (memcg_kmem_enabled())
1422 __memcg_kmem_uncharge_memcg(memcg
, 1 << order
);
1426 * helper for accessing a memcg's index. It will be used as an index in the
1427 * child cache array in kmem_cache, and also to derive its name. This function
1428 * will return -1 when this is not a kmem-limited memcg.
1430 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
1432 return memcg
? memcg
->kmemcg_id
: -1;
1437 static inline int memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
)
1442 static inline void memcg_kmem_uncharge(struct page
*page
, int order
)
1446 static inline int __memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
)
1451 static inline void __memcg_kmem_uncharge(struct page
*page
, int order
)
1455 #define for_each_memcg_cache_index(_idx) \
1458 static inline bool memcg_kmem_enabled(void)
1463 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
1468 static inline void memcg_get_cache_ids(void)
1472 static inline void memcg_put_cache_ids(void)
1476 #endif /* CONFIG_MEMCG_KMEM */
1478 #endif /* _LINUX_MEMCONTROL_H */