1 /* memcontrol.h - Memory Controller
3 * Copyright IBM Corporation, 2007
4 * Author Balbir Singh <balbir@linux.vnet.ibm.com>
6 * Copyright 2007 OpenVZ SWsoft Inc
7 * Author: Pavel Emelianov <xemul@openvz.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
20 #ifndef _LINUX_MEMCONTROL_H
21 #define _LINUX_MEMCONTROL_H
22 #include <linux/cgroup.h>
23 #include <linux/vm_event_item.h>
24 #include <linux/hardirq.h>
25 #include <linux/jump_label.h>
26 #include <linux/page_counter.h>
27 #include <linux/vmpressure.h>
28 #include <linux/eventfd.h>
30 #include <linux/vmstat.h>
31 #include <linux/writeback.h>
32 #include <linux/page-flags.h>
39 /* Cgroup-specific page state, on top of universal node page state */
40 enum memcg_stat_item
{
41 MEMCG_CACHE
= NR_VM_NODE_STAT_ITEMS
,
46 /* XXX: why are these zone and not node counters? */
47 MEMCG_KERNEL_STACK_KB
,
51 enum memcg_memory_event
{
59 MEMCG_NR_MEMORY_EVENTS
,
62 enum mem_cgroup_protection
{
68 struct mem_cgroup_reclaim_cookie
{
71 unsigned int generation
;
76 #define MEM_CGROUP_ID_SHIFT 16
77 #define MEM_CGROUP_ID_MAX USHRT_MAX
79 struct mem_cgroup_id
{
85 * Per memcg event counter is incremented at every pagein/pageout. With THP,
86 * it will be incremated by the number of pages. This counter is used for
87 * for trigger some periodic events. This is straightforward and better
88 * than using jiffies etc. to handle periodic memcg event.
90 enum mem_cgroup_events_target
{
91 MEM_CGROUP_TARGET_THRESH
,
92 MEM_CGROUP_TARGET_SOFTLIMIT
,
93 MEM_CGROUP_TARGET_NUMAINFO
,
97 struct mem_cgroup_stat_cpu
{
98 long count
[MEMCG_NR_STAT
];
99 unsigned long events
[NR_VM_EVENT_ITEMS
];
100 unsigned long nr_page_events
;
101 unsigned long targets
[MEM_CGROUP_NTARGETS
];
104 struct mem_cgroup_reclaim_iter
{
105 struct mem_cgroup
*position
;
106 /* scan generation, increased every round-trip */
107 unsigned int generation
;
111 long count
[NR_VM_NODE_STAT_ITEMS
];
115 * Bitmap of shrinker::id corresponding to memcg-aware shrinkers,
116 * which have elements charged to this memcg.
118 struct memcg_shrinker_map
{
120 unsigned long map
[0];
124 * per-zone information in memory controller.
126 struct mem_cgroup_per_node
{
127 struct lruvec lruvec
;
129 struct lruvec_stat __percpu
*lruvec_stat_cpu
;
130 atomic_long_t lruvec_stat
[NR_VM_NODE_STAT_ITEMS
];
132 unsigned long lru_zone_size
[MAX_NR_ZONES
][NR_LRU_LISTS
];
134 struct mem_cgroup_reclaim_iter iter
[DEF_PRIORITY
+ 1];
136 #ifdef CONFIG_MEMCG_KMEM
137 struct memcg_shrinker_map __rcu
*shrinker_map
;
139 struct rb_node tree_node
; /* RB tree node */
140 unsigned long usage_in_excess
;/* Set to the value by which */
141 /* the soft limit is exceeded*/
143 bool congested
; /* memcg has many dirty pages */
144 /* backed by a congested BDI */
146 struct mem_cgroup
*memcg
; /* Back pointer, we cannot */
147 /* use container_of */
150 struct mem_cgroup_threshold
{
151 struct eventfd_ctx
*eventfd
;
152 unsigned long threshold
;
156 struct mem_cgroup_threshold_ary
{
157 /* An array index points to threshold just below or equal to usage. */
158 int current_threshold
;
159 /* Size of entries[] */
161 /* Array of thresholds */
162 struct mem_cgroup_threshold entries
[0];
165 struct mem_cgroup_thresholds
{
166 /* Primary thresholds array */
167 struct mem_cgroup_threshold_ary
*primary
;
169 * Spare threshold array.
170 * This is needed to make mem_cgroup_unregister_event() "never fail".
171 * It must be able to store at least primary->size - 1 entries.
173 struct mem_cgroup_threshold_ary
*spare
;
176 enum memcg_kmem_state
{
182 #if defined(CONFIG_SMP)
183 struct memcg_padding
{
185 } ____cacheline_internodealigned_in_smp
;
186 #define MEMCG_PADDING(name) struct memcg_padding name;
188 #define MEMCG_PADDING(name)
192 * The memory controller data structure. The memory controller controls both
193 * page cache and RSS per cgroup. We would eventually like to provide
194 * statistics based on the statistics developed by Rik Van Riel for clock-pro,
195 * to help the administrator determine what knobs to tune.
198 struct cgroup_subsys_state css
;
200 /* Private memcg ID. Used to ID objects that outlive the cgroup */
201 struct mem_cgroup_id id
;
203 /* Accounted resources */
204 struct page_counter memory
;
205 struct page_counter swap
;
207 /* Legacy consumer-oriented counters */
208 struct page_counter memsw
;
209 struct page_counter kmem
;
210 struct page_counter tcpmem
;
212 /* Upper bound of normal memory consumption range */
215 /* Range enforcement for interrupt charges */
216 struct work_struct high_work
;
218 unsigned long soft_limit
;
220 /* vmpressure notifications */
221 struct vmpressure vmpressure
;
224 * Should the accounting and control be hierarchical, per subtree?
229 * Should the OOM killer kill all belonging tasks, had it kill one?
233 /* protected by memcg_oom_lock */
238 /* OOM-Killer disable */
239 int oom_kill_disable
;
242 struct cgroup_file events_file
;
244 /* handle for "memory.swap.events" */
245 struct cgroup_file swap_events_file
;
247 /* protect arrays of thresholds */
248 struct mutex thresholds_lock
;
250 /* thresholds for memory usage. RCU-protected */
251 struct mem_cgroup_thresholds thresholds
;
253 /* thresholds for mem+swap usage. RCU-protected */
254 struct mem_cgroup_thresholds memsw_thresholds
;
256 /* For oom notifier event fd */
257 struct list_head oom_notify
;
260 * Should we move charges of a task when a task is moved into this
261 * mem_cgroup ? And what type of charges should we move ?
263 unsigned long move_charge_at_immigrate
;
264 /* taken only while moving_account > 0 */
265 spinlock_t move_lock
;
266 unsigned long move_lock_flags
;
268 MEMCG_PADDING(_pad1_
);
271 * set > 0 if pages under this cgroup are moving to other cgroup.
273 atomic_t moving_account
;
274 struct task_struct
*move_lock_task
;
277 struct mem_cgroup_stat_cpu __percpu
*stat_cpu
;
279 MEMCG_PADDING(_pad2_
);
281 atomic_long_t stat
[MEMCG_NR_STAT
];
282 atomic_long_t events
[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
*lruvec_memcg(struct lruvec
*lruvec
)
434 struct mem_cgroup_per_node
*mz
;
436 if (mem_cgroup_disabled())
439 mz
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
444 * parent_mem_cgroup - find the accounting parent of a memcg
445 * @memcg: memcg whose parent to find
447 * Returns the parent memcg, or NULL if this is the root or the memory
448 * controller is in legacy no-hierarchy mode.
450 static inline struct mem_cgroup
*parent_mem_cgroup(struct mem_cgroup
*memcg
)
452 if (!memcg
->memory
.parent
)
454 return mem_cgroup_from_counter(memcg
->memory
.parent
, memory
);
457 static inline bool mem_cgroup_is_descendant(struct mem_cgroup
*memcg
,
458 struct mem_cgroup
*root
)
462 if (!root
->use_hierarchy
)
464 return cgroup_is_descendant(memcg
->css
.cgroup
, root
->css
.cgroup
);
467 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
468 struct mem_cgroup
*memcg
)
470 struct mem_cgroup
*task_memcg
;
474 task_memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
476 match
= mem_cgroup_is_descendant(task_memcg
, memcg
);
481 struct cgroup_subsys_state
*mem_cgroup_css_from_page(struct page
*page
);
482 ino_t
page_cgroup_ino(struct page
*page
);
484 static inline bool mem_cgroup_online(struct mem_cgroup
*memcg
)
486 if (mem_cgroup_disabled())
488 return !!(memcg
->css
.flags
& CSS_ONLINE
);
492 * For memory reclaim.
494 int mem_cgroup_select_victim_node(struct mem_cgroup
*memcg
);
496 void mem_cgroup_update_lru_size(struct lruvec
*lruvec
, enum lru_list lru
,
497 int zid
, int nr_pages
);
499 unsigned long mem_cgroup_node_nr_lru_pages(struct mem_cgroup
*memcg
,
500 int nid
, unsigned int lru_mask
);
503 unsigned long mem_cgroup_get_lru_size(struct lruvec
*lruvec
, enum lru_list lru
)
505 struct mem_cgroup_per_node
*mz
;
506 unsigned long nr_pages
= 0;
509 mz
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
510 for (zid
= 0; zid
< MAX_NR_ZONES
; zid
++)
511 nr_pages
+= mz
->lru_zone_size
[zid
][lru
];
516 unsigned long mem_cgroup_get_zone_lru_size(struct lruvec
*lruvec
,
517 enum lru_list lru
, int zone_idx
)
519 struct mem_cgroup_per_node
*mz
;
521 mz
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
522 return mz
->lru_zone_size
[zone_idx
][lru
];
525 void mem_cgroup_handle_over_high(void);
527 unsigned long mem_cgroup_get_max(struct mem_cgroup
*memcg
);
529 void mem_cgroup_print_oom_info(struct mem_cgroup
*memcg
,
530 struct task_struct
*p
);
532 static inline void mem_cgroup_enter_user_fault(void)
534 WARN_ON(current
->in_user_fault
);
535 current
->in_user_fault
= 1;
538 static inline void mem_cgroup_exit_user_fault(void)
540 WARN_ON(!current
->in_user_fault
);
541 current
->in_user_fault
= 0;
544 static inline bool task_in_memcg_oom(struct task_struct
*p
)
546 return p
->memcg_in_oom
;
549 bool mem_cgroup_oom_synchronize(bool wait
);
550 struct mem_cgroup
*mem_cgroup_get_oom_group(struct task_struct
*victim
,
551 struct mem_cgroup
*oom_domain
);
552 void mem_cgroup_print_oom_group(struct mem_cgroup
*memcg
);
554 #ifdef CONFIG_MEMCG_SWAP
555 extern int do_swap_account
;
558 struct mem_cgroup
*lock_page_memcg(struct page
*page
);
559 void __unlock_page_memcg(struct mem_cgroup
*memcg
);
560 void unlock_page_memcg(struct page
*page
);
562 /* idx can be of type enum memcg_stat_item or node_stat_item */
563 static inline unsigned long memcg_page_state(struct mem_cgroup
*memcg
,
566 long x
= atomic_long_read(&memcg
->stat
[idx
]);
574 /* idx can be of type enum memcg_stat_item or node_stat_item */
575 static inline void __mod_memcg_state(struct mem_cgroup
*memcg
,
580 if (mem_cgroup_disabled())
583 x
= val
+ __this_cpu_read(memcg
->stat_cpu
->count
[idx
]);
584 if (unlikely(abs(x
) > MEMCG_CHARGE_BATCH
)) {
585 atomic_long_add(x
, &memcg
->stat
[idx
]);
588 __this_cpu_write(memcg
->stat_cpu
->count
[idx
], x
);
591 /* idx can be of type enum memcg_stat_item or node_stat_item */
592 static inline void mod_memcg_state(struct mem_cgroup
*memcg
,
597 local_irq_save(flags
);
598 __mod_memcg_state(memcg
, idx
, val
);
599 local_irq_restore(flags
);
603 * mod_memcg_page_state - update page state statistics
605 * @idx: page state item to account
606 * @val: number of pages (positive or negative)
608 * The @page must be locked or the caller must use lock_page_memcg()
609 * to prevent double accounting when the page is concurrently being
610 * moved to another memcg:
612 * lock_page(page) or lock_page_memcg(page)
613 * if (TestClearPageState(page))
614 * mod_memcg_page_state(page, state, -1);
615 * unlock_page(page) or unlock_page_memcg(page)
617 * Kernel pages are an exception to this, since they'll never move.
619 static inline void __mod_memcg_page_state(struct page
*page
,
622 if (page
->mem_cgroup
)
623 __mod_memcg_state(page
->mem_cgroup
, idx
, val
);
626 static inline void mod_memcg_page_state(struct page
*page
,
629 if (page
->mem_cgroup
)
630 mod_memcg_state(page
->mem_cgroup
, idx
, val
);
633 static inline unsigned long lruvec_page_state(struct lruvec
*lruvec
,
634 enum node_stat_item idx
)
636 struct mem_cgroup_per_node
*pn
;
639 if (mem_cgroup_disabled())
640 return node_page_state(lruvec_pgdat(lruvec
), idx
);
642 pn
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
643 x
= atomic_long_read(&pn
->lruvec_stat
[idx
]);
651 static inline void __mod_lruvec_state(struct lruvec
*lruvec
,
652 enum node_stat_item idx
, int val
)
654 struct mem_cgroup_per_node
*pn
;
658 __mod_node_page_state(lruvec_pgdat(lruvec
), idx
, val
);
660 if (mem_cgroup_disabled())
663 pn
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
666 __mod_memcg_state(pn
->memcg
, idx
, val
);
669 x
= val
+ __this_cpu_read(pn
->lruvec_stat_cpu
->count
[idx
]);
670 if (unlikely(abs(x
) > MEMCG_CHARGE_BATCH
)) {
671 atomic_long_add(x
, &pn
->lruvec_stat
[idx
]);
674 __this_cpu_write(pn
->lruvec_stat_cpu
->count
[idx
], x
);
677 static inline void mod_lruvec_state(struct lruvec
*lruvec
,
678 enum node_stat_item idx
, int val
)
682 local_irq_save(flags
);
683 __mod_lruvec_state(lruvec
, idx
, val
);
684 local_irq_restore(flags
);
687 static inline void __mod_lruvec_page_state(struct page
*page
,
688 enum node_stat_item idx
, int val
)
690 pg_data_t
*pgdat
= page_pgdat(page
);
691 struct lruvec
*lruvec
;
693 /* Untracked pages have no memcg, no lruvec. Update only the node */
694 if (!page
->mem_cgroup
) {
695 __mod_node_page_state(pgdat
, idx
, val
);
699 lruvec
= mem_cgroup_lruvec(pgdat
, page
->mem_cgroup
);
700 __mod_lruvec_state(lruvec
, idx
, val
);
703 static inline void mod_lruvec_page_state(struct page
*page
,
704 enum node_stat_item idx
, int val
)
708 local_irq_save(flags
);
709 __mod_lruvec_page_state(page
, idx
, val
);
710 local_irq_restore(flags
);
713 unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t
*pgdat
, int order
,
715 unsigned long *total_scanned
);
717 static inline void __count_memcg_events(struct mem_cgroup
*memcg
,
718 enum vm_event_item idx
,
723 if (mem_cgroup_disabled())
726 x
= count
+ __this_cpu_read(memcg
->stat_cpu
->events
[idx
]);
727 if (unlikely(x
> MEMCG_CHARGE_BATCH
)) {
728 atomic_long_add(x
, &memcg
->events
[idx
]);
731 __this_cpu_write(memcg
->stat_cpu
->events
[idx
], x
);
734 static inline void count_memcg_events(struct mem_cgroup
*memcg
,
735 enum vm_event_item idx
,
740 local_irq_save(flags
);
741 __count_memcg_events(memcg
, idx
, count
);
742 local_irq_restore(flags
);
745 static inline void count_memcg_page_event(struct page
*page
,
746 enum vm_event_item idx
)
748 if (page
->mem_cgroup
)
749 count_memcg_events(page
->mem_cgroup
, idx
, 1);
752 static inline void count_memcg_event_mm(struct mm_struct
*mm
,
753 enum vm_event_item idx
)
755 struct mem_cgroup
*memcg
;
757 if (mem_cgroup_disabled())
761 memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
763 count_memcg_events(memcg
, idx
, 1);
767 static inline void memcg_memory_event(struct mem_cgroup
*memcg
,
768 enum memcg_memory_event event
)
770 atomic_long_inc(&memcg
->memory_events
[event
]);
771 cgroup_file_notify(&memcg
->events_file
);
774 static inline void memcg_memory_event_mm(struct mm_struct
*mm
,
775 enum memcg_memory_event event
)
777 struct mem_cgroup
*memcg
;
779 if (mem_cgroup_disabled())
783 memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
785 memcg_memory_event(memcg
, event
);
789 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
790 void mem_cgroup_split_huge_fixup(struct page
*head
);
793 #else /* CONFIG_MEMCG */
795 #define MEM_CGROUP_ID_SHIFT 0
796 #define MEM_CGROUP_ID_MAX 0
800 static inline bool mem_cgroup_is_root(struct mem_cgroup
*memcg
)
805 static inline bool mem_cgroup_disabled(void)
810 static inline void memcg_memory_event(struct mem_cgroup
*memcg
,
811 enum memcg_memory_event event
)
815 static inline void memcg_memory_event_mm(struct mm_struct
*mm
,
816 enum memcg_memory_event event
)
820 static inline enum mem_cgroup_protection
mem_cgroup_protected(
821 struct mem_cgroup
*root
, struct mem_cgroup
*memcg
)
823 return MEMCG_PROT_NONE
;
826 static inline int mem_cgroup_try_charge(struct page
*page
, struct mm_struct
*mm
,
828 struct mem_cgroup
**memcgp
,
835 static inline int mem_cgroup_try_charge_delay(struct page
*page
,
836 struct mm_struct
*mm
,
838 struct mem_cgroup
**memcgp
,
845 static inline void mem_cgroup_commit_charge(struct page
*page
,
846 struct mem_cgroup
*memcg
,
847 bool lrucare
, bool compound
)
851 static inline void mem_cgroup_cancel_charge(struct page
*page
,
852 struct mem_cgroup
*memcg
,
857 static inline void mem_cgroup_uncharge(struct page
*page
)
861 static inline void mem_cgroup_uncharge_list(struct list_head
*page_list
)
865 static inline void mem_cgroup_migrate(struct page
*old
, struct page
*new)
869 static inline struct lruvec
*mem_cgroup_lruvec(struct pglist_data
*pgdat
,
870 struct mem_cgroup
*memcg
)
872 return node_lruvec(pgdat
);
875 static inline struct lruvec
*mem_cgroup_page_lruvec(struct page
*page
,
876 struct pglist_data
*pgdat
)
878 return &pgdat
->lruvec
;
881 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
882 struct mem_cgroup
*memcg
)
887 static inline bool task_in_mem_cgroup(struct task_struct
*task
,
888 const struct mem_cgroup
*memcg
)
893 static inline struct mem_cgroup
*get_mem_cgroup_from_mm(struct mm_struct
*mm
)
898 static inline struct mem_cgroup
*get_mem_cgroup_from_page(struct page
*page
)
903 static inline void mem_cgroup_put(struct mem_cgroup
*memcg
)
907 static inline struct mem_cgroup
*
908 mem_cgroup_iter(struct mem_cgroup
*root
,
909 struct mem_cgroup
*prev
,
910 struct mem_cgroup_reclaim_cookie
*reclaim
)
915 static inline void mem_cgroup_iter_break(struct mem_cgroup
*root
,
916 struct mem_cgroup
*prev
)
920 static inline int mem_cgroup_scan_tasks(struct mem_cgroup
*memcg
,
921 int (*fn
)(struct task_struct
*, void *), void *arg
)
926 static inline unsigned short mem_cgroup_id(struct mem_cgroup
*memcg
)
931 static inline struct mem_cgroup
*mem_cgroup_from_id(unsigned short id
)
934 /* XXX: This should always return root_mem_cgroup */
938 static inline struct mem_cgroup
*lruvec_memcg(struct lruvec
*lruvec
)
943 static inline bool mem_cgroup_online(struct mem_cgroup
*memcg
)
948 static inline unsigned long
949 mem_cgroup_get_lru_size(struct lruvec
*lruvec
, enum lru_list lru
)
954 unsigned long mem_cgroup_get_zone_lru_size(struct lruvec
*lruvec
,
955 enum lru_list lru
, int zone_idx
)
960 static inline unsigned long
961 mem_cgroup_node_nr_lru_pages(struct mem_cgroup
*memcg
,
962 int nid
, unsigned int lru_mask
)
967 static inline unsigned long mem_cgroup_get_max(struct mem_cgroup
*memcg
)
973 mem_cgroup_print_oom_info(struct mem_cgroup
*memcg
, struct task_struct
*p
)
977 static inline struct mem_cgroup
*lock_page_memcg(struct page
*page
)
982 static inline void __unlock_page_memcg(struct mem_cgroup
*memcg
)
986 static inline void unlock_page_memcg(struct page
*page
)
990 static inline void mem_cgroup_handle_over_high(void)
994 static inline void mem_cgroup_enter_user_fault(void)
998 static inline void mem_cgroup_exit_user_fault(void)
1002 static inline bool task_in_memcg_oom(struct task_struct
*p
)
1007 static inline bool mem_cgroup_oom_synchronize(bool wait
)
1012 static inline struct mem_cgroup
*mem_cgroup_get_oom_group(
1013 struct task_struct
*victim
, struct mem_cgroup
*oom_domain
)
1018 static inline void mem_cgroup_print_oom_group(struct mem_cgroup
*memcg
)
1022 static inline unsigned long memcg_page_state(struct mem_cgroup
*memcg
,
1028 static inline void __mod_memcg_state(struct mem_cgroup
*memcg
,
1034 static inline void mod_memcg_state(struct mem_cgroup
*memcg
,
1040 static inline void __mod_memcg_page_state(struct page
*page
,
1046 static inline void mod_memcg_page_state(struct page
*page
,
1052 static inline unsigned long lruvec_page_state(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_page_event(struct page
*page
,
1106 void count_memcg_event_mm(struct mm_struct
*mm
, enum vm_event_item idx
)
1109 #endif /* CONFIG_MEMCG */
1111 /* idx can be of type enum memcg_stat_item or node_stat_item */
1112 static inline void __inc_memcg_state(struct mem_cgroup
*memcg
,
1115 __mod_memcg_state(memcg
, idx
, 1);
1118 /* idx can be of type enum memcg_stat_item or node_stat_item */
1119 static inline void __dec_memcg_state(struct mem_cgroup
*memcg
,
1122 __mod_memcg_state(memcg
, idx
, -1);
1125 /* idx can be of type enum memcg_stat_item or node_stat_item */
1126 static inline void __inc_memcg_page_state(struct page
*page
,
1129 __mod_memcg_page_state(page
, idx
, 1);
1132 /* idx can be of type enum memcg_stat_item or node_stat_item */
1133 static inline void __dec_memcg_page_state(struct page
*page
,
1136 __mod_memcg_page_state(page
, idx
, -1);
1139 static inline void __inc_lruvec_state(struct lruvec
*lruvec
,
1140 enum node_stat_item idx
)
1142 __mod_lruvec_state(lruvec
, idx
, 1);
1145 static inline void __dec_lruvec_state(struct lruvec
*lruvec
,
1146 enum node_stat_item idx
)
1148 __mod_lruvec_state(lruvec
, idx
, -1);
1151 static inline void __inc_lruvec_page_state(struct page
*page
,
1152 enum node_stat_item idx
)
1154 __mod_lruvec_page_state(page
, idx
, 1);
1157 static inline void __dec_lruvec_page_state(struct page
*page
,
1158 enum node_stat_item idx
)
1160 __mod_lruvec_page_state(page
, idx
, -1);
1163 /* idx can be of type enum memcg_stat_item or node_stat_item */
1164 static inline void inc_memcg_state(struct mem_cgroup
*memcg
,
1167 mod_memcg_state(memcg
, idx
, 1);
1170 /* idx can be of type enum memcg_stat_item or node_stat_item */
1171 static inline void dec_memcg_state(struct mem_cgroup
*memcg
,
1174 mod_memcg_state(memcg
, idx
, -1);
1177 /* idx can be of type enum memcg_stat_item or node_stat_item */
1178 static inline void inc_memcg_page_state(struct page
*page
,
1181 mod_memcg_page_state(page
, idx
, 1);
1184 /* idx can be of type enum memcg_stat_item or node_stat_item */
1185 static inline void dec_memcg_page_state(struct page
*page
,
1188 mod_memcg_page_state(page
, idx
, -1);
1191 static inline void inc_lruvec_state(struct lruvec
*lruvec
,
1192 enum node_stat_item idx
)
1194 mod_lruvec_state(lruvec
, idx
, 1);
1197 static inline void dec_lruvec_state(struct lruvec
*lruvec
,
1198 enum node_stat_item idx
)
1200 mod_lruvec_state(lruvec
, idx
, -1);
1203 static inline void inc_lruvec_page_state(struct page
*page
,
1204 enum node_stat_item idx
)
1206 mod_lruvec_page_state(page
, idx
, 1);
1209 static inline void dec_lruvec_page_state(struct page
*page
,
1210 enum node_stat_item idx
)
1212 mod_lruvec_page_state(page
, idx
, -1);
1215 #ifdef CONFIG_CGROUP_WRITEBACK
1217 struct wb_domain
*mem_cgroup_wb_domain(struct bdi_writeback
*wb
);
1218 void mem_cgroup_wb_stats(struct bdi_writeback
*wb
, unsigned long *pfilepages
,
1219 unsigned long *pheadroom
, unsigned long *pdirty
,
1220 unsigned long *pwriteback
);
1222 #else /* CONFIG_CGROUP_WRITEBACK */
1224 static inline struct wb_domain
*mem_cgroup_wb_domain(struct bdi_writeback
*wb
)
1229 static inline void mem_cgroup_wb_stats(struct bdi_writeback
*wb
,
1230 unsigned long *pfilepages
,
1231 unsigned long *pheadroom
,
1232 unsigned long *pdirty
,
1233 unsigned long *pwriteback
)
1237 #endif /* CONFIG_CGROUP_WRITEBACK */
1240 bool mem_cgroup_charge_skmem(struct mem_cgroup
*memcg
, unsigned int nr_pages
);
1241 void mem_cgroup_uncharge_skmem(struct mem_cgroup
*memcg
, unsigned int nr_pages
);
1243 extern struct static_key_false memcg_sockets_enabled_key
;
1244 #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key)
1245 void mem_cgroup_sk_alloc(struct sock
*sk
);
1246 void mem_cgroup_sk_free(struct sock
*sk
);
1247 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup
*memcg
)
1249 if (!cgroup_subsys_on_dfl(memory_cgrp_subsys
) && memcg
->tcpmem_pressure
)
1252 if (time_before(jiffies
, memcg
->socket_pressure
))
1254 } while ((memcg
= parent_mem_cgroup(memcg
)));
1258 #define mem_cgroup_sockets_enabled 0
1259 static inline void mem_cgroup_sk_alloc(struct sock
*sk
) { };
1260 static inline void mem_cgroup_sk_free(struct sock
*sk
) { };
1261 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup
*memcg
)
1267 struct kmem_cache
*memcg_kmem_get_cache(struct kmem_cache
*cachep
);
1268 void memcg_kmem_put_cache(struct kmem_cache
*cachep
);
1269 int memcg_kmem_charge_memcg(struct page
*page
, gfp_t gfp
, int order
,
1270 struct mem_cgroup
*memcg
);
1272 #ifdef CONFIG_MEMCG_KMEM
1273 int memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
);
1274 void memcg_kmem_uncharge(struct page
*page
, int order
);
1276 extern struct static_key_false memcg_kmem_enabled_key
;
1277 extern struct workqueue_struct
*memcg_kmem_cache_wq
;
1279 extern int memcg_nr_cache_ids
;
1280 void memcg_get_cache_ids(void);
1281 void memcg_put_cache_ids(void);
1284 * Helper macro to loop through all memcg-specific caches. Callers must still
1285 * check if the cache is valid (it is either valid or NULL).
1286 * the slab_mutex must be held when looping through those caches
1288 #define for_each_memcg_cache_index(_idx) \
1289 for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++)
1291 static inline bool memcg_kmem_enabled(void)
1293 return static_branch_unlikely(&memcg_kmem_enabled_key
);
1297 * helper for accessing a memcg's index. It will be used as an index in the
1298 * child cache array in kmem_cache, and also to derive its name. This function
1299 * will return -1 when this is not a kmem-limited memcg.
1301 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
1303 return memcg
? memcg
->kmemcg_id
: -1;
1306 extern int memcg_expand_shrinker_maps(int new_id
);
1308 extern void memcg_set_shrinker_bit(struct mem_cgroup
*memcg
,
1309 int nid
, int shrinker_id
);
1312 static inline int memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
)
1317 static inline void memcg_kmem_uncharge(struct page
*page
, int order
)
1321 #define for_each_memcg_cache_index(_idx) \
1324 static inline bool memcg_kmem_enabled(void)
1329 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
1334 static inline void memcg_get_cache_ids(void)
1338 static inline void memcg_put_cache_ids(void)
1342 static inline void memcg_set_shrinker_bit(struct mem_cgroup
*memcg
,
1343 int nid
, int shrinker_id
) { }
1344 #endif /* CONFIG_MEMCG_KMEM */
1346 #endif /* _LINUX_MEMCONTROL_H */