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
{
58 MEMCG_NR_MEMORY_EVENTS
,
61 struct mem_cgroup_reclaim_cookie
{
64 unsigned int generation
;
69 #define MEM_CGROUP_ID_SHIFT 16
70 #define MEM_CGROUP_ID_MAX USHRT_MAX
72 struct mem_cgroup_id
{
78 * Per memcg event counter is incremented at every pagein/pageout. With THP,
79 * it will be incremated by the number of pages. This counter is used for
80 * for trigger some periodic events. This is straightforward and better
81 * than using jiffies etc. to handle periodic memcg event.
83 enum mem_cgroup_events_target
{
84 MEM_CGROUP_TARGET_THRESH
,
85 MEM_CGROUP_TARGET_SOFTLIMIT
,
86 MEM_CGROUP_TARGET_NUMAINFO
,
90 struct mem_cgroup_stat_cpu
{
91 long count
[MEMCG_NR_STAT
];
92 unsigned long events
[NR_VM_EVENT_ITEMS
];
93 unsigned long nr_page_events
;
94 unsigned long targets
[MEM_CGROUP_NTARGETS
];
97 struct mem_cgroup_reclaim_iter
{
98 struct mem_cgroup
*position
;
99 /* scan generation, increased every round-trip */
100 unsigned int generation
;
104 long count
[NR_VM_NODE_STAT_ITEMS
];
108 * per-zone information in memory controller.
110 struct mem_cgroup_per_node
{
111 struct lruvec lruvec
;
113 struct lruvec_stat __percpu
*lruvec_stat_cpu
;
114 atomic_long_t lruvec_stat
[NR_VM_NODE_STAT_ITEMS
];
116 unsigned long lru_zone_size
[MAX_NR_ZONES
][NR_LRU_LISTS
];
118 struct mem_cgroup_reclaim_iter iter
[DEF_PRIORITY
+ 1];
120 struct rb_node tree_node
; /* RB tree node */
121 unsigned long usage_in_excess
;/* Set to the value by which */
122 /* the soft limit is exceeded*/
124 bool congested
; /* memcg has many dirty pages */
125 /* backed by a congested BDI */
127 struct mem_cgroup
*memcg
; /* Back pointer, we cannot */
128 /* use container_of */
131 struct mem_cgroup_threshold
{
132 struct eventfd_ctx
*eventfd
;
133 unsigned long threshold
;
137 struct mem_cgroup_threshold_ary
{
138 /* An array index points to threshold just below or equal to usage. */
139 int current_threshold
;
140 /* Size of entries[] */
142 /* Array of thresholds */
143 struct mem_cgroup_threshold entries
[0];
146 struct mem_cgroup_thresholds
{
147 /* Primary thresholds array */
148 struct mem_cgroup_threshold_ary
*primary
;
150 * Spare threshold array.
151 * This is needed to make mem_cgroup_unregister_event() "never fail".
152 * It must be able to store at least primary->size - 1 entries.
154 struct mem_cgroup_threshold_ary
*spare
;
157 enum memcg_kmem_state
{
164 * The memory controller data structure. The memory controller controls both
165 * page cache and RSS per cgroup. We would eventually like to provide
166 * statistics based on the statistics developed by Rik Van Riel for clock-pro,
167 * to help the administrator determine what knobs to tune.
170 struct cgroup_subsys_state css
;
172 /* Private memcg ID. Used to ID objects that outlive the cgroup */
173 struct mem_cgroup_id id
;
175 /* Accounted resources */
176 struct page_counter memory
;
177 struct page_counter swap
;
179 /* Legacy consumer-oriented counters */
180 struct page_counter memsw
;
181 struct page_counter kmem
;
182 struct page_counter tcpmem
;
184 /* Upper bound of normal memory consumption range */
187 /* Range enforcement for interrupt charges */
188 struct work_struct high_work
;
190 unsigned long soft_limit
;
192 /* vmpressure notifications */
193 struct vmpressure vmpressure
;
196 * Should the accounting and control be hierarchical, per subtree?
200 /* protected by memcg_oom_lock */
205 /* OOM-Killer disable */
206 int oom_kill_disable
;
209 atomic_long_t memory_events
[MEMCG_NR_MEMORY_EVENTS
];
210 struct cgroup_file events_file
;
212 /* handle for "memory.swap.events" */
213 struct cgroup_file swap_events_file
;
215 /* protect arrays of thresholds */
216 struct mutex thresholds_lock
;
218 /* thresholds for memory usage. RCU-protected */
219 struct mem_cgroup_thresholds thresholds
;
221 /* thresholds for mem+swap usage. RCU-protected */
222 struct mem_cgroup_thresholds memsw_thresholds
;
224 /* For oom notifier event fd */
225 struct list_head oom_notify
;
228 * Should we move charges of a task when a task is moved into this
229 * mem_cgroup ? And what type of charges should we move ?
231 unsigned long move_charge_at_immigrate
;
233 * set > 0 if pages under this cgroup are moving to other cgroup.
235 atomic_t moving_account
;
236 /* taken only while moving_account > 0 */
237 spinlock_t move_lock
;
238 struct task_struct
*move_lock_task
;
239 unsigned long move_lock_flags
;
242 struct mem_cgroup_stat_cpu __percpu
*stat_cpu
;
243 atomic_long_t stat
[MEMCG_NR_STAT
];
244 atomic_long_t events
[NR_VM_EVENT_ITEMS
];
246 unsigned long socket_pressure
;
248 /* Legacy tcp memory accounting */
253 /* Index in the kmem_cache->memcg_params.memcg_caches array */
255 enum memcg_kmem_state kmem_state
;
256 struct list_head kmem_caches
;
259 int last_scanned_node
;
261 nodemask_t scan_nodes
;
262 atomic_t numainfo_events
;
263 atomic_t numainfo_updating
;
266 #ifdef CONFIG_CGROUP_WRITEBACK
267 struct list_head cgwb_list
;
268 struct wb_domain cgwb_domain
;
271 /* List of events which userspace want to receive */
272 struct list_head event_list
;
273 spinlock_t event_list_lock
;
275 struct mem_cgroup_per_node
*nodeinfo
[0];
276 /* WARNING: nodeinfo must be the last member here */
280 * size of first charge trial. "32" comes from vmscan.c's magic value.
281 * TODO: maybe necessary to use big numbers in big irons.
283 #define MEMCG_CHARGE_BATCH 32U
285 extern struct mem_cgroup
*root_mem_cgroup
;
287 static inline bool mem_cgroup_disabled(void)
289 return !cgroup_subsys_enabled(memory_cgrp_subsys
);
292 bool mem_cgroup_low(struct mem_cgroup
*root
, struct mem_cgroup
*memcg
);
294 int mem_cgroup_try_charge(struct page
*page
, struct mm_struct
*mm
,
295 gfp_t gfp_mask
, struct mem_cgroup
**memcgp
,
297 void mem_cgroup_commit_charge(struct page
*page
, struct mem_cgroup
*memcg
,
298 bool lrucare
, bool compound
);
299 void mem_cgroup_cancel_charge(struct page
*page
, struct mem_cgroup
*memcg
,
301 void mem_cgroup_uncharge(struct page
*page
);
302 void mem_cgroup_uncharge_list(struct list_head
*page_list
);
304 void mem_cgroup_migrate(struct page
*oldpage
, struct page
*newpage
);
306 static struct mem_cgroup_per_node
*
307 mem_cgroup_nodeinfo(struct mem_cgroup
*memcg
, int nid
)
309 return memcg
->nodeinfo
[nid
];
313 * mem_cgroup_lruvec - get the lru list vector for a node or a memcg zone
314 * @node: node of the wanted lruvec
315 * @memcg: memcg of the wanted lruvec
317 * Returns the lru list vector holding pages for a given @node or a given
318 * @memcg and @zone. This can be the node lruvec, if the memory controller
321 static inline struct lruvec
*mem_cgroup_lruvec(struct pglist_data
*pgdat
,
322 struct mem_cgroup
*memcg
)
324 struct mem_cgroup_per_node
*mz
;
325 struct lruvec
*lruvec
;
327 if (mem_cgroup_disabled()) {
328 lruvec
= node_lruvec(pgdat
);
332 mz
= mem_cgroup_nodeinfo(memcg
, pgdat
->node_id
);
333 lruvec
= &mz
->lruvec
;
336 * Since a node can be onlined after the mem_cgroup was created,
337 * we have to be prepared to initialize lruvec->pgdat here;
338 * and if offlined then reonlined, we need to reinitialize it.
340 if (unlikely(lruvec
->pgdat
!= pgdat
))
341 lruvec
->pgdat
= pgdat
;
345 struct lruvec
*mem_cgroup_page_lruvec(struct page
*, struct pglist_data
*);
347 bool task_in_mem_cgroup(struct task_struct
*task
, struct mem_cgroup
*memcg
);
348 struct mem_cgroup
*mem_cgroup_from_task(struct task_struct
*p
);
351 struct mem_cgroup
*mem_cgroup_from_css(struct cgroup_subsys_state
*css
){
352 return css
? container_of(css
, struct mem_cgroup
, css
) : NULL
;
355 #define mem_cgroup_from_counter(counter, member) \
356 container_of(counter, struct mem_cgroup, member)
358 struct mem_cgroup
*mem_cgroup_iter(struct mem_cgroup
*,
360 struct mem_cgroup_reclaim_cookie
*);
361 void mem_cgroup_iter_break(struct mem_cgroup
*, struct mem_cgroup
*);
362 int mem_cgroup_scan_tasks(struct mem_cgroup
*,
363 int (*)(struct task_struct
*, void *), void *);
365 static inline unsigned short mem_cgroup_id(struct mem_cgroup
*memcg
)
367 if (mem_cgroup_disabled())
372 struct mem_cgroup
*mem_cgroup_from_id(unsigned short id
);
374 static inline struct mem_cgroup
*lruvec_memcg(struct lruvec
*lruvec
)
376 struct mem_cgroup_per_node
*mz
;
378 if (mem_cgroup_disabled())
381 mz
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
386 * parent_mem_cgroup - find the accounting parent of a memcg
387 * @memcg: memcg whose parent to find
389 * Returns the parent memcg, or NULL if this is the root or the memory
390 * controller is in legacy no-hierarchy mode.
392 static inline struct mem_cgroup
*parent_mem_cgroup(struct mem_cgroup
*memcg
)
394 if (!memcg
->memory
.parent
)
396 return mem_cgroup_from_counter(memcg
->memory
.parent
, memory
);
399 static inline bool mem_cgroup_is_descendant(struct mem_cgroup
*memcg
,
400 struct mem_cgroup
*root
)
404 if (!root
->use_hierarchy
)
406 return cgroup_is_descendant(memcg
->css
.cgroup
, root
->css
.cgroup
);
409 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
410 struct mem_cgroup
*memcg
)
412 struct mem_cgroup
*task_memcg
;
416 task_memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
418 match
= mem_cgroup_is_descendant(task_memcg
, memcg
);
423 struct cgroup_subsys_state
*mem_cgroup_css_from_page(struct page
*page
);
424 ino_t
page_cgroup_ino(struct page
*page
);
426 static inline bool mem_cgroup_online(struct mem_cgroup
*memcg
)
428 if (mem_cgroup_disabled())
430 return !!(memcg
->css
.flags
& CSS_ONLINE
);
434 * For memory reclaim.
436 int mem_cgroup_select_victim_node(struct mem_cgroup
*memcg
);
438 void mem_cgroup_update_lru_size(struct lruvec
*lruvec
, enum lru_list lru
,
439 int zid
, int nr_pages
);
441 unsigned long mem_cgroup_node_nr_lru_pages(struct mem_cgroup
*memcg
,
442 int nid
, unsigned int lru_mask
);
445 unsigned long mem_cgroup_get_lru_size(struct lruvec
*lruvec
, enum lru_list lru
)
447 struct mem_cgroup_per_node
*mz
;
448 unsigned long nr_pages
= 0;
451 mz
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
452 for (zid
= 0; zid
< MAX_NR_ZONES
; zid
++)
453 nr_pages
+= mz
->lru_zone_size
[zid
][lru
];
458 unsigned long mem_cgroup_get_zone_lru_size(struct lruvec
*lruvec
,
459 enum lru_list lru
, int zone_idx
)
461 struct mem_cgroup_per_node
*mz
;
463 mz
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
464 return mz
->lru_zone_size
[zone_idx
][lru
];
467 void mem_cgroup_handle_over_high(void);
469 unsigned long mem_cgroup_get_max(struct mem_cgroup
*memcg
);
471 void mem_cgroup_print_oom_info(struct mem_cgroup
*memcg
,
472 struct task_struct
*p
);
474 static inline void mem_cgroup_oom_enable(void)
476 WARN_ON(current
->memcg_may_oom
);
477 current
->memcg_may_oom
= 1;
480 static inline void mem_cgroup_oom_disable(void)
482 WARN_ON(!current
->memcg_may_oom
);
483 current
->memcg_may_oom
= 0;
486 static inline bool task_in_memcg_oom(struct task_struct
*p
)
488 return p
->memcg_in_oom
;
491 bool mem_cgroup_oom_synchronize(bool wait
);
493 #ifdef CONFIG_MEMCG_SWAP
494 extern int do_swap_account
;
497 struct mem_cgroup
*lock_page_memcg(struct page
*page
);
498 void __unlock_page_memcg(struct mem_cgroup
*memcg
);
499 void unlock_page_memcg(struct page
*page
);
501 /* idx can be of type enum memcg_stat_item or node_stat_item */
502 static inline unsigned long memcg_page_state(struct mem_cgroup
*memcg
,
505 long x
= atomic_long_read(&memcg
->stat
[idx
]);
513 /* idx can be of type enum memcg_stat_item or node_stat_item */
514 static inline void __mod_memcg_state(struct mem_cgroup
*memcg
,
519 if (mem_cgroup_disabled())
522 x
= val
+ __this_cpu_read(memcg
->stat_cpu
->count
[idx
]);
523 if (unlikely(abs(x
) > MEMCG_CHARGE_BATCH
)) {
524 atomic_long_add(x
, &memcg
->stat
[idx
]);
527 __this_cpu_write(memcg
->stat_cpu
->count
[idx
], x
);
530 /* idx can be of type enum memcg_stat_item or node_stat_item */
531 static inline void mod_memcg_state(struct mem_cgroup
*memcg
,
536 local_irq_save(flags
);
537 __mod_memcg_state(memcg
, idx
, val
);
538 local_irq_restore(flags
);
542 * mod_memcg_page_state - update page state statistics
544 * @idx: page state item to account
545 * @val: number of pages (positive or negative)
547 * The @page must be locked or the caller must use lock_page_memcg()
548 * to prevent double accounting when the page is concurrently being
549 * moved to another memcg:
551 * lock_page(page) or lock_page_memcg(page)
552 * if (TestClearPageState(page))
553 * mod_memcg_page_state(page, state, -1);
554 * unlock_page(page) or unlock_page_memcg(page)
556 * Kernel pages are an exception to this, since they'll never move.
558 static inline void __mod_memcg_page_state(struct page
*page
,
561 if (page
->mem_cgroup
)
562 __mod_memcg_state(page
->mem_cgroup
, idx
, val
);
565 static inline void mod_memcg_page_state(struct page
*page
,
568 if (page
->mem_cgroup
)
569 mod_memcg_state(page
->mem_cgroup
, idx
, val
);
572 static inline unsigned long lruvec_page_state(struct lruvec
*lruvec
,
573 enum node_stat_item idx
)
575 struct mem_cgroup_per_node
*pn
;
578 if (mem_cgroup_disabled())
579 return node_page_state(lruvec_pgdat(lruvec
), idx
);
581 pn
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
582 x
= atomic_long_read(&pn
->lruvec_stat
[idx
]);
590 static inline void __mod_lruvec_state(struct lruvec
*lruvec
,
591 enum node_stat_item idx
, int val
)
593 struct mem_cgroup_per_node
*pn
;
597 __mod_node_page_state(lruvec_pgdat(lruvec
), idx
, val
);
599 if (mem_cgroup_disabled())
602 pn
= container_of(lruvec
, struct mem_cgroup_per_node
, lruvec
);
605 __mod_memcg_state(pn
->memcg
, idx
, val
);
608 x
= val
+ __this_cpu_read(pn
->lruvec_stat_cpu
->count
[idx
]);
609 if (unlikely(abs(x
) > MEMCG_CHARGE_BATCH
)) {
610 atomic_long_add(x
, &pn
->lruvec_stat
[idx
]);
613 __this_cpu_write(pn
->lruvec_stat_cpu
->count
[idx
], x
);
616 static inline void mod_lruvec_state(struct lruvec
*lruvec
,
617 enum node_stat_item idx
, int val
)
621 local_irq_save(flags
);
622 __mod_lruvec_state(lruvec
, idx
, val
);
623 local_irq_restore(flags
);
626 static inline void __mod_lruvec_page_state(struct page
*page
,
627 enum node_stat_item idx
, int val
)
629 pg_data_t
*pgdat
= page_pgdat(page
);
630 struct lruvec
*lruvec
;
632 /* Untracked pages have no memcg, no lruvec. Update only the node */
633 if (!page
->mem_cgroup
) {
634 __mod_node_page_state(pgdat
, idx
, val
);
638 lruvec
= mem_cgroup_lruvec(pgdat
, page
->mem_cgroup
);
639 __mod_lruvec_state(lruvec
, idx
, val
);
642 static inline void mod_lruvec_page_state(struct page
*page
,
643 enum node_stat_item idx
, int val
)
647 local_irq_save(flags
);
648 __mod_lruvec_page_state(page
, idx
, val
);
649 local_irq_restore(flags
);
652 unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t
*pgdat
, int order
,
654 unsigned long *total_scanned
);
656 static inline void __count_memcg_events(struct mem_cgroup
*memcg
,
657 enum vm_event_item idx
,
662 if (mem_cgroup_disabled())
665 x
= count
+ __this_cpu_read(memcg
->stat_cpu
->events
[idx
]);
666 if (unlikely(x
> MEMCG_CHARGE_BATCH
)) {
667 atomic_long_add(x
, &memcg
->events
[idx
]);
670 __this_cpu_write(memcg
->stat_cpu
->events
[idx
], x
);
673 static inline void count_memcg_events(struct mem_cgroup
*memcg
,
674 enum vm_event_item idx
,
679 local_irq_save(flags
);
680 __count_memcg_events(memcg
, idx
, count
);
681 local_irq_restore(flags
);
684 static inline void count_memcg_page_event(struct page
*page
,
685 enum vm_event_item idx
)
687 if (page
->mem_cgroup
)
688 count_memcg_events(page
->mem_cgroup
, idx
, 1);
691 static inline void count_memcg_event_mm(struct mm_struct
*mm
,
692 enum vm_event_item idx
)
694 struct mem_cgroup
*memcg
;
696 if (mem_cgroup_disabled())
700 memcg
= mem_cgroup_from_task(rcu_dereference(mm
->owner
));
702 count_memcg_events(memcg
, idx
, 1);
704 cgroup_file_notify(&memcg
->events_file
);
709 static inline void memcg_memory_event(struct mem_cgroup
*memcg
,
710 enum memcg_memory_event event
)
712 atomic_long_inc(&memcg
->memory_events
[event
]);
713 cgroup_file_notify(&memcg
->events_file
);
716 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
717 void mem_cgroup_split_huge_fixup(struct page
*head
);
720 #else /* CONFIG_MEMCG */
722 #define MEM_CGROUP_ID_SHIFT 0
723 #define MEM_CGROUP_ID_MAX 0
727 static inline bool mem_cgroup_disabled(void)
732 static inline void memcg_memory_event(struct mem_cgroup
*memcg
,
733 enum memcg_memory_event event
)
737 static inline bool mem_cgroup_low(struct mem_cgroup
*root
,
738 struct mem_cgroup
*memcg
)
743 static inline int mem_cgroup_try_charge(struct page
*page
, struct mm_struct
*mm
,
745 struct mem_cgroup
**memcgp
,
752 static inline void mem_cgroup_commit_charge(struct page
*page
,
753 struct mem_cgroup
*memcg
,
754 bool lrucare
, bool compound
)
758 static inline void mem_cgroup_cancel_charge(struct page
*page
,
759 struct mem_cgroup
*memcg
,
764 static inline void mem_cgroup_uncharge(struct page
*page
)
768 static inline void mem_cgroup_uncharge_list(struct list_head
*page_list
)
772 static inline void mem_cgroup_migrate(struct page
*old
, struct page
*new)
776 static inline struct lruvec
*mem_cgroup_lruvec(struct pglist_data
*pgdat
,
777 struct mem_cgroup
*memcg
)
779 return node_lruvec(pgdat
);
782 static inline struct lruvec
*mem_cgroup_page_lruvec(struct page
*page
,
783 struct pglist_data
*pgdat
)
785 return &pgdat
->lruvec
;
788 static inline bool mm_match_cgroup(struct mm_struct
*mm
,
789 struct mem_cgroup
*memcg
)
794 static inline bool task_in_mem_cgroup(struct task_struct
*task
,
795 const struct mem_cgroup
*memcg
)
800 static inline struct mem_cgroup
*
801 mem_cgroup_iter(struct mem_cgroup
*root
,
802 struct mem_cgroup
*prev
,
803 struct mem_cgroup_reclaim_cookie
*reclaim
)
808 static inline void mem_cgroup_iter_break(struct mem_cgroup
*root
,
809 struct mem_cgroup
*prev
)
813 static inline int mem_cgroup_scan_tasks(struct mem_cgroup
*memcg
,
814 int (*fn
)(struct task_struct
*, void *), void *arg
)
819 static inline unsigned short mem_cgroup_id(struct mem_cgroup
*memcg
)
824 static inline struct mem_cgroup
*mem_cgroup_from_id(unsigned short id
)
827 /* XXX: This should always return root_mem_cgroup */
831 static inline struct mem_cgroup
*lruvec_memcg(struct lruvec
*lruvec
)
836 static inline bool mem_cgroup_online(struct mem_cgroup
*memcg
)
841 static inline unsigned long
842 mem_cgroup_get_lru_size(struct lruvec
*lruvec
, enum lru_list lru
)
847 unsigned long mem_cgroup_get_zone_lru_size(struct lruvec
*lruvec
,
848 enum lru_list lru
, int zone_idx
)
853 static inline unsigned long
854 mem_cgroup_node_nr_lru_pages(struct mem_cgroup
*memcg
,
855 int nid
, unsigned int lru_mask
)
860 static inline unsigned long mem_cgroup_get_max(struct mem_cgroup
*memcg
)
866 mem_cgroup_print_oom_info(struct mem_cgroup
*memcg
, struct task_struct
*p
)
870 static inline struct mem_cgroup
*lock_page_memcg(struct page
*page
)
875 static inline void __unlock_page_memcg(struct mem_cgroup
*memcg
)
879 static inline void unlock_page_memcg(struct page
*page
)
883 static inline void mem_cgroup_handle_over_high(void)
887 static inline void mem_cgroup_oom_enable(void)
891 static inline void mem_cgroup_oom_disable(void)
895 static inline bool task_in_memcg_oom(struct task_struct
*p
)
900 static inline bool mem_cgroup_oom_synchronize(bool wait
)
905 static inline unsigned long memcg_page_state(struct mem_cgroup
*memcg
,
911 static inline void __mod_memcg_state(struct mem_cgroup
*memcg
,
917 static inline void mod_memcg_state(struct mem_cgroup
*memcg
,
923 static inline void __mod_memcg_page_state(struct page
*page
,
929 static inline void mod_memcg_page_state(struct page
*page
,
935 static inline unsigned long lruvec_page_state(struct lruvec
*lruvec
,
936 enum node_stat_item idx
)
938 return node_page_state(lruvec_pgdat(lruvec
), idx
);
941 static inline void __mod_lruvec_state(struct lruvec
*lruvec
,
942 enum node_stat_item idx
, int val
)
944 __mod_node_page_state(lruvec_pgdat(lruvec
), idx
, val
);
947 static inline void mod_lruvec_state(struct lruvec
*lruvec
,
948 enum node_stat_item idx
, int val
)
950 mod_node_page_state(lruvec_pgdat(lruvec
), idx
, val
);
953 static inline void __mod_lruvec_page_state(struct page
*page
,
954 enum node_stat_item idx
, int val
)
956 __mod_node_page_state(page_pgdat(page
), idx
, val
);
959 static inline void mod_lruvec_page_state(struct page
*page
,
960 enum node_stat_item idx
, int val
)
962 mod_node_page_state(page_pgdat(page
), idx
, val
);
966 unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t
*pgdat
, int order
,
968 unsigned long *total_scanned
)
973 static inline void mem_cgroup_split_huge_fixup(struct page
*head
)
977 static inline void count_memcg_events(struct mem_cgroup
*memcg
,
978 enum vm_event_item idx
,
983 static inline void count_memcg_page_event(struct page
*page
,
989 void count_memcg_event_mm(struct mm_struct
*mm
, enum vm_event_item idx
)
992 #endif /* CONFIG_MEMCG */
994 /* idx can be of type enum memcg_stat_item or node_stat_item */
995 static inline void __inc_memcg_state(struct mem_cgroup
*memcg
,
998 __mod_memcg_state(memcg
, idx
, 1);
1001 /* idx can be of type enum memcg_stat_item or node_stat_item */
1002 static inline void __dec_memcg_state(struct mem_cgroup
*memcg
,
1005 __mod_memcg_state(memcg
, idx
, -1);
1008 /* idx can be of type enum memcg_stat_item or node_stat_item */
1009 static inline void __inc_memcg_page_state(struct page
*page
,
1012 __mod_memcg_page_state(page
, idx
, 1);
1015 /* idx can be of type enum memcg_stat_item or node_stat_item */
1016 static inline void __dec_memcg_page_state(struct page
*page
,
1019 __mod_memcg_page_state(page
, idx
, -1);
1022 static inline void __inc_lruvec_state(struct lruvec
*lruvec
,
1023 enum node_stat_item idx
)
1025 __mod_lruvec_state(lruvec
, idx
, 1);
1028 static inline void __dec_lruvec_state(struct lruvec
*lruvec
,
1029 enum node_stat_item idx
)
1031 __mod_lruvec_state(lruvec
, idx
, -1);
1034 static inline void __inc_lruvec_page_state(struct page
*page
,
1035 enum node_stat_item idx
)
1037 __mod_lruvec_page_state(page
, idx
, 1);
1040 static inline void __dec_lruvec_page_state(struct page
*page
,
1041 enum node_stat_item idx
)
1043 __mod_lruvec_page_state(page
, idx
, -1);
1046 /* idx can be of type enum memcg_stat_item or node_stat_item */
1047 static inline void inc_memcg_state(struct mem_cgroup
*memcg
,
1050 mod_memcg_state(memcg
, idx
, 1);
1053 /* idx can be of type enum memcg_stat_item or node_stat_item */
1054 static inline void dec_memcg_state(struct mem_cgroup
*memcg
,
1057 mod_memcg_state(memcg
, idx
, -1);
1060 /* idx can be of type enum memcg_stat_item or node_stat_item */
1061 static inline void inc_memcg_page_state(struct page
*page
,
1064 mod_memcg_page_state(page
, idx
, 1);
1067 /* idx can be of type enum memcg_stat_item or node_stat_item */
1068 static inline void dec_memcg_page_state(struct page
*page
,
1071 mod_memcg_page_state(page
, idx
, -1);
1074 static inline void inc_lruvec_state(struct lruvec
*lruvec
,
1075 enum node_stat_item idx
)
1077 mod_lruvec_state(lruvec
, idx
, 1);
1080 static inline void dec_lruvec_state(struct lruvec
*lruvec
,
1081 enum node_stat_item idx
)
1083 mod_lruvec_state(lruvec
, idx
, -1);
1086 static inline void inc_lruvec_page_state(struct page
*page
,
1087 enum node_stat_item idx
)
1089 mod_lruvec_page_state(page
, idx
, 1);
1092 static inline void dec_lruvec_page_state(struct page
*page
,
1093 enum node_stat_item idx
)
1095 mod_lruvec_page_state(page
, idx
, -1);
1098 #ifdef CONFIG_CGROUP_WRITEBACK
1100 struct wb_domain
*mem_cgroup_wb_domain(struct bdi_writeback
*wb
);
1101 void mem_cgroup_wb_stats(struct bdi_writeback
*wb
, unsigned long *pfilepages
,
1102 unsigned long *pheadroom
, unsigned long *pdirty
,
1103 unsigned long *pwriteback
);
1105 #else /* CONFIG_CGROUP_WRITEBACK */
1107 static inline struct wb_domain
*mem_cgroup_wb_domain(struct bdi_writeback
*wb
)
1112 static inline void mem_cgroup_wb_stats(struct bdi_writeback
*wb
,
1113 unsigned long *pfilepages
,
1114 unsigned long *pheadroom
,
1115 unsigned long *pdirty
,
1116 unsigned long *pwriteback
)
1120 #endif /* CONFIG_CGROUP_WRITEBACK */
1123 bool mem_cgroup_charge_skmem(struct mem_cgroup
*memcg
, unsigned int nr_pages
);
1124 void mem_cgroup_uncharge_skmem(struct mem_cgroup
*memcg
, unsigned int nr_pages
);
1126 extern struct static_key_false memcg_sockets_enabled_key
;
1127 #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key)
1128 void mem_cgroup_sk_alloc(struct sock
*sk
);
1129 void mem_cgroup_sk_free(struct sock
*sk
);
1130 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup
*memcg
)
1132 if (!cgroup_subsys_on_dfl(memory_cgrp_subsys
) && memcg
->tcpmem_pressure
)
1135 if (time_before(jiffies
, memcg
->socket_pressure
))
1137 } while ((memcg
= parent_mem_cgroup(memcg
)));
1141 #define mem_cgroup_sockets_enabled 0
1142 static inline void mem_cgroup_sk_alloc(struct sock
*sk
) { };
1143 static inline void mem_cgroup_sk_free(struct sock
*sk
) { };
1144 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup
*memcg
)
1150 struct kmem_cache
*memcg_kmem_get_cache(struct kmem_cache
*cachep
);
1151 void memcg_kmem_put_cache(struct kmem_cache
*cachep
);
1152 int memcg_kmem_charge_memcg(struct page
*page
, gfp_t gfp
, int order
,
1153 struct mem_cgroup
*memcg
);
1154 int memcg_kmem_charge(struct page
*page
, gfp_t gfp
, int order
);
1155 void memcg_kmem_uncharge(struct page
*page
, int order
);
1157 #if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
1158 extern struct static_key_false memcg_kmem_enabled_key
;
1159 extern struct workqueue_struct
*memcg_kmem_cache_wq
;
1161 extern int memcg_nr_cache_ids
;
1162 void memcg_get_cache_ids(void);
1163 void memcg_put_cache_ids(void);
1166 * Helper macro to loop through all memcg-specific caches. Callers must still
1167 * check if the cache is valid (it is either valid or NULL).
1168 * the slab_mutex must be held when looping through those caches
1170 #define for_each_memcg_cache_index(_idx) \
1171 for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++)
1173 static inline bool memcg_kmem_enabled(void)
1175 return static_branch_unlikely(&memcg_kmem_enabled_key
);
1179 * helper for accessing a memcg's index. It will be used as an index in the
1180 * child cache array in kmem_cache, and also to derive its name. This function
1181 * will return -1 when this is not a kmem-limited memcg.
1183 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
1185 return memcg
? memcg
->kmemcg_id
: -1;
1189 #define for_each_memcg_cache_index(_idx) \
1192 static inline bool memcg_kmem_enabled(void)
1197 static inline int memcg_cache_id(struct mem_cgroup
*memcg
)
1202 static inline void memcg_get_cache_ids(void)
1206 static inline void memcg_put_cache_ids(void)
1210 #endif /* CONFIG_MEMCG && !CONFIG_SLOB */
1212 #endif /* _LINUX_MEMCONTROL_H */