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 /* Cgroup-specific events, on top of universal VM events */
52 enum memcg_event_item {
53 MEMCG_LOW = NR_VM_EVENT_ITEMS,
60 struct mem_cgroup_reclaim_cookie {
63 unsigned int generation;
68 #define MEM_CGROUP_ID_SHIFT 16
69 #define MEM_CGROUP_ID_MAX USHRT_MAX
71 struct mem_cgroup_id {
77 * Per memcg event counter is incremented at every pagein/pageout. With THP,
78 * it will be incremated by the number of pages. This counter is used for
79 * for trigger some periodic events. This is straightforward and better
80 * than using jiffies etc. to handle periodic memcg event.
82 enum mem_cgroup_events_target {
83 MEM_CGROUP_TARGET_THRESH,
84 MEM_CGROUP_TARGET_SOFTLIMIT,
85 MEM_CGROUP_TARGET_NUMAINFO,
89 struct mem_cgroup_stat_cpu {
90 long count[MEMCG_NR_STAT];
91 unsigned long events[MEMCG_NR_EVENTS];
92 unsigned long nr_page_events;
93 unsigned long targets[MEM_CGROUP_NTARGETS];
96 struct mem_cgroup_reclaim_iter {
97 struct mem_cgroup *position;
98 /* scan generation, increased every round-trip */
99 unsigned int generation;
103 long count[NR_VM_NODE_STAT_ITEMS];
107 * per-zone information in memory controller.
109 struct mem_cgroup_per_node {
110 struct lruvec lruvec;
111 struct lruvec_stat __percpu *lruvec_stat;
112 unsigned long lru_zone_size[MAX_NR_ZONES][NR_LRU_LISTS];
114 struct mem_cgroup_reclaim_iter iter[DEF_PRIORITY + 1];
116 struct rb_node tree_node; /* RB tree node */
117 unsigned long usage_in_excess;/* Set to the value by which */
118 /* the soft limit is exceeded*/
120 struct mem_cgroup *memcg; /* Back pointer, we cannot */
121 /* use container_of */
124 struct mem_cgroup_threshold {
125 struct eventfd_ctx *eventfd;
126 unsigned long threshold;
130 struct mem_cgroup_threshold_ary {
131 /* An array index points to threshold just below or equal to usage. */
132 int current_threshold;
133 /* Size of entries[] */
135 /* Array of thresholds */
136 struct mem_cgroup_threshold entries[0];
139 struct mem_cgroup_thresholds {
140 /* Primary thresholds array */
141 struct mem_cgroup_threshold_ary *primary;
143 * Spare threshold array.
144 * This is needed to make mem_cgroup_unregister_event() "never fail".
145 * It must be able to store at least primary->size - 1 entries.
147 struct mem_cgroup_threshold_ary *spare;
150 enum memcg_kmem_state {
157 * The memory controller data structure. The memory controller controls both
158 * page cache and RSS per cgroup. We would eventually like to provide
159 * statistics based on the statistics developed by Rik Van Riel for clock-pro,
160 * to help the administrator determine what knobs to tune.
163 struct cgroup_subsys_state css;
165 /* Private memcg ID. Used to ID objects that outlive the cgroup */
166 struct mem_cgroup_id id;
168 /* Accounted resources */
169 struct page_counter memory;
170 struct page_counter swap;
172 /* Legacy consumer-oriented counters */
173 struct page_counter memsw;
174 struct page_counter kmem;
175 struct page_counter tcpmem;
177 /* Normal memory consumption range */
181 /* Range enforcement for interrupt charges */
182 struct work_struct high_work;
184 unsigned long soft_limit;
186 /* vmpressure notifications */
187 struct vmpressure vmpressure;
190 * Should the accounting and control be hierarchical, per subtree?
194 /* protected by memcg_oom_lock */
199 /* OOM-Killer disable */
200 int oom_kill_disable;
202 /* handle for "memory.events" */
203 struct cgroup_file events_file;
205 /* protect arrays of thresholds */
206 struct mutex thresholds_lock;
208 /* thresholds for memory usage. RCU-protected */
209 struct mem_cgroup_thresholds thresholds;
211 /* thresholds for mem+swap usage. RCU-protected */
212 struct mem_cgroup_thresholds memsw_thresholds;
214 /* For oom notifier event fd */
215 struct list_head oom_notify;
218 * Should we move charges of a task when a task is moved into this
219 * mem_cgroup ? And what type of charges should we move ?
221 unsigned long move_charge_at_immigrate;
223 * set > 0 if pages under this cgroup are moving to other cgroup.
225 atomic_t moving_account;
226 /* taken only while moving_account > 0 */
227 spinlock_t move_lock;
228 struct task_struct *move_lock_task;
229 unsigned long move_lock_flags;
233 struct mem_cgroup_stat_cpu __percpu *stat;
235 unsigned long socket_pressure;
237 /* Legacy tcp memory accounting */
242 /* Index in the kmem_cache->memcg_params.memcg_caches array */
244 enum memcg_kmem_state kmem_state;
245 struct list_head kmem_caches;
248 int last_scanned_node;
250 nodemask_t scan_nodes;
251 atomic_t numainfo_events;
252 atomic_t numainfo_updating;
255 #ifdef CONFIG_CGROUP_WRITEBACK
256 struct list_head cgwb_list;
257 struct wb_domain cgwb_domain;
260 /* List of events which userspace want to receive */
261 struct list_head event_list;
262 spinlock_t event_list_lock;
264 struct mem_cgroup_per_node *nodeinfo[0];
265 /* WARNING: nodeinfo must be the last member here */
268 extern struct mem_cgroup *root_mem_cgroup;
270 static inline bool mem_cgroup_disabled(void)
272 return !cgroup_subsys_enabled(memory_cgrp_subsys);
275 bool mem_cgroup_low(struct mem_cgroup *root, struct mem_cgroup *memcg);
277 int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
278 gfp_t gfp_mask, struct mem_cgroup **memcgp,
280 void mem_cgroup_commit_charge(struct page *page, struct mem_cgroup *memcg,
281 bool lrucare, bool compound);
282 void mem_cgroup_cancel_charge(struct page *page, struct mem_cgroup *memcg,
284 void mem_cgroup_uncharge(struct page *page);
285 void mem_cgroup_uncharge_list(struct list_head *page_list);
287 void mem_cgroup_migrate(struct page *oldpage, struct page *newpage);
289 static struct mem_cgroup_per_node *
290 mem_cgroup_nodeinfo(struct mem_cgroup *memcg, int nid)
292 return memcg->nodeinfo[nid];
296 * mem_cgroup_lruvec - get the lru list vector for a node or a memcg zone
297 * @node: node of the wanted lruvec
298 * @memcg: memcg of the wanted lruvec
300 * Returns the lru list vector holding pages for a given @node or a given
301 * @memcg and @zone. This can be the node lruvec, if the memory controller
304 static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat,
305 struct mem_cgroup *memcg)
307 struct mem_cgroup_per_node *mz;
308 struct lruvec *lruvec;
310 if (mem_cgroup_disabled()) {
311 lruvec = node_lruvec(pgdat);
315 mz = mem_cgroup_nodeinfo(memcg, pgdat->node_id);
316 lruvec = &mz->lruvec;
319 * Since a node can be onlined after the mem_cgroup was created,
320 * we have to be prepared to initialize lruvec->pgdat here;
321 * and if offlined then reonlined, we need to reinitialize it.
323 if (unlikely(lruvec->pgdat != pgdat))
324 lruvec->pgdat = pgdat;
328 struct lruvec *mem_cgroup_page_lruvec(struct page *, struct pglist_data *);
330 bool task_in_mem_cgroup(struct task_struct *task, struct mem_cgroup *memcg);
331 struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
334 struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css){
335 return css ? container_of(css, struct mem_cgroup, css) : NULL;
338 #define mem_cgroup_from_counter(counter, member) \
339 container_of(counter, struct mem_cgroup, member)
341 struct mem_cgroup *mem_cgroup_iter(struct mem_cgroup *,
343 struct mem_cgroup_reclaim_cookie *);
344 void mem_cgroup_iter_break(struct mem_cgroup *, struct mem_cgroup *);
345 int mem_cgroup_scan_tasks(struct mem_cgroup *,
346 int (*)(struct task_struct *, void *), void *);
348 static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg)
350 if (mem_cgroup_disabled())
355 struct mem_cgroup *mem_cgroup_from_id(unsigned short id);
357 static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec)
359 struct mem_cgroup_per_node *mz;
361 if (mem_cgroup_disabled())
364 mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
369 * parent_mem_cgroup - find the accounting parent of a memcg
370 * @memcg: memcg whose parent to find
372 * Returns the parent memcg, or NULL if this is the root or the memory
373 * controller is in legacy no-hierarchy mode.
375 static inline struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg)
377 if (!memcg->memory.parent)
379 return mem_cgroup_from_counter(memcg->memory.parent, memory);
382 static inline bool mem_cgroup_is_descendant(struct mem_cgroup *memcg,
383 struct mem_cgroup *root)
387 if (!root->use_hierarchy)
389 return cgroup_is_descendant(memcg->css.cgroup, root->css.cgroup);
392 static inline bool mm_match_cgroup(struct mm_struct *mm,
393 struct mem_cgroup *memcg)
395 struct mem_cgroup *task_memcg;
399 task_memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
401 match = mem_cgroup_is_descendant(task_memcg, memcg);
406 struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page);
407 ino_t page_cgroup_ino(struct page *page);
409 static inline bool mem_cgroup_online(struct mem_cgroup *memcg)
411 if (mem_cgroup_disabled())
413 return !!(memcg->css.flags & CSS_ONLINE);
417 * For memory reclaim.
419 int mem_cgroup_select_victim_node(struct mem_cgroup *memcg);
421 void mem_cgroup_update_lru_size(struct lruvec *lruvec, enum lru_list lru,
422 int zid, int nr_pages);
424 unsigned long mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg,
425 int nid, unsigned int lru_mask);
428 unsigned long mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru)
430 struct mem_cgroup_per_node *mz;
431 unsigned long nr_pages = 0;
434 mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
435 for (zid = 0; zid < MAX_NR_ZONES; zid++)
436 nr_pages += mz->lru_zone_size[zid][lru];
441 unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec,
442 enum lru_list lru, int zone_idx)
444 struct mem_cgroup_per_node *mz;
446 mz = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
447 return mz->lru_zone_size[zone_idx][lru];
450 void mem_cgroup_handle_over_high(void);
452 unsigned long mem_cgroup_get_limit(struct mem_cgroup *memcg);
454 void mem_cgroup_print_oom_info(struct mem_cgroup *memcg,
455 struct task_struct *p);
457 static inline void mem_cgroup_oom_enable(void)
459 WARN_ON(current->memcg_may_oom);
460 current->memcg_may_oom = 1;
463 static inline void mem_cgroup_oom_disable(void)
465 WARN_ON(!current->memcg_may_oom);
466 current->memcg_may_oom = 0;
469 static inline bool task_in_memcg_oom(struct task_struct *p)
471 return p->memcg_in_oom;
474 bool mem_cgroup_oom_synchronize(bool wait);
476 #ifdef CONFIG_MEMCG_SWAP
477 extern int do_swap_account;
480 struct mem_cgroup *lock_page_memcg(struct page *page);
481 void __unlock_page_memcg(struct mem_cgroup *memcg);
482 void unlock_page_memcg(struct page *page);
484 /* idx can be of type enum memcg_stat_item or node_stat_item */
485 static inline unsigned long memcg_page_state(struct mem_cgroup *memcg,
491 for_each_possible_cpu(cpu)
492 val += per_cpu(memcg->stat->count[idx], cpu);
500 /* idx can be of type enum memcg_stat_item or node_stat_item */
501 static inline void __mod_memcg_state(struct mem_cgroup *memcg,
504 if (!mem_cgroup_disabled())
505 __this_cpu_add(memcg->stat->count[idx], val);
508 /* idx can be of type enum memcg_stat_item or node_stat_item */
509 static inline void mod_memcg_state(struct mem_cgroup *memcg,
512 if (!mem_cgroup_disabled())
513 this_cpu_add(memcg->stat->count[idx], val);
517 * mod_memcg_page_state - update page state statistics
519 * @idx: page state item to account
520 * @val: number of pages (positive or negative)
522 * The @page must be locked or the caller must use lock_page_memcg()
523 * to prevent double accounting when the page is concurrently being
524 * moved to another memcg:
526 * lock_page(page) or lock_page_memcg(page)
527 * if (TestClearPageState(page))
528 * mod_memcg_page_state(page, state, -1);
529 * unlock_page(page) or unlock_page_memcg(page)
531 * Kernel pages are an exception to this, since they'll never move.
533 static inline void __mod_memcg_page_state(struct page *page,
536 if (page->mem_cgroup)
537 __mod_memcg_state(page->mem_cgroup, idx, val);
540 static inline void mod_memcg_page_state(struct page *page,
543 if (page->mem_cgroup)
544 mod_memcg_state(page->mem_cgroup, idx, val);
547 static inline unsigned long lruvec_page_state(struct lruvec *lruvec,
548 enum node_stat_item idx)
550 struct mem_cgroup_per_node *pn;
554 if (mem_cgroup_disabled())
555 return node_page_state(lruvec_pgdat(lruvec), idx);
557 pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
558 for_each_possible_cpu(cpu)
559 val += per_cpu(pn->lruvec_stat->count[idx], cpu);
567 static inline void __mod_lruvec_state(struct lruvec *lruvec,
568 enum node_stat_item idx, int val)
570 struct mem_cgroup_per_node *pn;
573 __mod_node_page_state(lruvec_pgdat(lruvec), idx, val);
575 if (mem_cgroup_disabled())
578 pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec);
581 __mod_memcg_state(pn->memcg, idx, val);
584 __this_cpu_add(pn->lruvec_stat->count[idx], val);
587 static inline void mod_lruvec_state(struct lruvec *lruvec,
588 enum node_stat_item idx, int val)
591 __mod_lruvec_state(lruvec, idx, val);
595 static inline void __mod_lruvec_page_state(struct page *page,
596 enum node_stat_item idx, int val)
598 pg_data_t *pgdat = page_pgdat(page);
599 struct lruvec *lruvec;
601 /* Untracked pages have no memcg, no lruvec. Update only the node */
602 if (!page->mem_cgroup) {
603 __mod_node_page_state(pgdat, idx, val);
607 lruvec = mem_cgroup_lruvec(pgdat, page->mem_cgroup);
608 __mod_lruvec_state(lruvec, idx, val);
611 static inline void mod_lruvec_page_state(struct page *page,
612 enum node_stat_item idx, int val)
615 __mod_lruvec_page_state(page, idx, val);
619 unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order,
621 unsigned long *total_scanned);
623 /* idx can be of type enum memcg_event_item or vm_event_item */
624 static inline void __count_memcg_events(struct mem_cgroup *memcg,
625 int idx, unsigned long count)
627 if (!mem_cgroup_disabled())
628 __this_cpu_add(memcg->stat->events[idx], count);
631 /* idx can be of type enum memcg_event_item or vm_event_item */
632 static inline void count_memcg_events(struct mem_cgroup *memcg,
633 int idx, unsigned long count)
635 if (!mem_cgroup_disabled())
636 this_cpu_add(memcg->stat->events[idx], count);
639 /* idx can be of type enum memcg_event_item or vm_event_item */
640 static inline void count_memcg_page_event(struct page *page,
643 if (page->mem_cgroup)
644 count_memcg_events(page->mem_cgroup, idx, 1);
647 static inline void count_memcg_event_mm(struct mm_struct *mm,
648 enum vm_event_item idx)
650 struct mem_cgroup *memcg;
652 if (mem_cgroup_disabled())
656 memcg = mem_cgroup_from_task(rcu_dereference(mm->owner));
658 count_memcg_events(memcg, idx, 1);
660 cgroup_file_notify(&memcg->events_file);
665 static inline void mem_cgroup_event(struct mem_cgroup *memcg,
666 enum memcg_event_item event)
668 count_memcg_events(memcg, event, 1);
669 cgroup_file_notify(&memcg->events_file);
672 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
673 void mem_cgroup_split_huge_fixup(struct page *head);
676 #else /* CONFIG_MEMCG */
678 #define MEM_CGROUP_ID_SHIFT 0
679 #define MEM_CGROUP_ID_MAX 0
683 static inline bool mem_cgroup_disabled(void)
688 static inline void mem_cgroup_event(struct mem_cgroup *memcg,
689 enum memcg_event_item event)
693 static inline bool mem_cgroup_low(struct mem_cgroup *root,
694 struct mem_cgroup *memcg)
699 static inline int mem_cgroup_try_charge(struct page *page, struct mm_struct *mm,
701 struct mem_cgroup **memcgp,
708 static inline void mem_cgroup_commit_charge(struct page *page,
709 struct mem_cgroup *memcg,
710 bool lrucare, bool compound)
714 static inline void mem_cgroup_cancel_charge(struct page *page,
715 struct mem_cgroup *memcg,
720 static inline void mem_cgroup_uncharge(struct page *page)
724 static inline void mem_cgroup_uncharge_list(struct list_head *page_list)
728 static inline void mem_cgroup_migrate(struct page *old, struct page *new)
732 static inline struct lruvec *mem_cgroup_lruvec(struct pglist_data *pgdat,
733 struct mem_cgroup *memcg)
735 return node_lruvec(pgdat);
738 static inline struct lruvec *mem_cgroup_page_lruvec(struct page *page,
739 struct pglist_data *pgdat)
741 return &pgdat->lruvec;
744 static inline bool mm_match_cgroup(struct mm_struct *mm,
745 struct mem_cgroup *memcg)
750 static inline bool task_in_mem_cgroup(struct task_struct *task,
751 const struct mem_cgroup *memcg)
756 static inline struct mem_cgroup *
757 mem_cgroup_iter(struct mem_cgroup *root,
758 struct mem_cgroup *prev,
759 struct mem_cgroup_reclaim_cookie *reclaim)
764 static inline void mem_cgroup_iter_break(struct mem_cgroup *root,
765 struct mem_cgroup *prev)
769 static inline int mem_cgroup_scan_tasks(struct mem_cgroup *memcg,
770 int (*fn)(struct task_struct *, void *), void *arg)
775 static inline unsigned short mem_cgroup_id(struct mem_cgroup *memcg)
780 static inline struct mem_cgroup *mem_cgroup_from_id(unsigned short id)
783 /* XXX: This should always return root_mem_cgroup */
787 static inline struct mem_cgroup *lruvec_memcg(struct lruvec *lruvec)
792 static inline bool mem_cgroup_online(struct mem_cgroup *memcg)
797 static inline unsigned long
798 mem_cgroup_get_lru_size(struct lruvec *lruvec, enum lru_list lru)
803 unsigned long mem_cgroup_get_zone_lru_size(struct lruvec *lruvec,
804 enum lru_list lru, int zone_idx)
809 static inline unsigned long
810 mem_cgroup_node_nr_lru_pages(struct mem_cgroup *memcg,
811 int nid, unsigned int lru_mask)
816 static inline unsigned long mem_cgroup_get_limit(struct mem_cgroup *memcg)
822 mem_cgroup_print_oom_info(struct mem_cgroup *memcg, struct task_struct *p)
826 static inline struct mem_cgroup *lock_page_memcg(struct page *page)
831 static inline void __unlock_page_memcg(struct mem_cgroup *memcg)
835 static inline void unlock_page_memcg(struct page *page)
839 static inline void mem_cgroup_handle_over_high(void)
843 static inline void mem_cgroup_oom_enable(void)
847 static inline void mem_cgroup_oom_disable(void)
851 static inline bool task_in_memcg_oom(struct task_struct *p)
856 static inline bool mem_cgroup_oom_synchronize(bool wait)
861 static inline unsigned long memcg_page_state(struct mem_cgroup *memcg,
867 static inline void __mod_memcg_state(struct mem_cgroup *memcg,
873 static inline void mod_memcg_state(struct mem_cgroup *memcg,
879 static inline void __mod_memcg_page_state(struct page *page,
885 static inline void mod_memcg_page_state(struct page *page,
891 static inline unsigned long lruvec_page_state(struct lruvec *lruvec,
892 enum node_stat_item idx)
894 return node_page_state(lruvec_pgdat(lruvec), idx);
897 static inline void __mod_lruvec_state(struct lruvec *lruvec,
898 enum node_stat_item idx, int val)
900 __mod_node_page_state(lruvec_pgdat(lruvec), idx, val);
903 static inline void mod_lruvec_state(struct lruvec *lruvec,
904 enum node_stat_item idx, int val)
906 mod_node_page_state(lruvec_pgdat(lruvec), idx, val);
909 static inline void __mod_lruvec_page_state(struct page *page,
910 enum node_stat_item idx, int val)
912 __mod_node_page_state(page_pgdat(page), idx, val);
915 static inline void mod_lruvec_page_state(struct page *page,
916 enum node_stat_item idx, int val)
918 mod_node_page_state(page_pgdat(page), idx, val);
922 unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order,
924 unsigned long *total_scanned)
929 static inline void mem_cgroup_split_huge_fixup(struct page *head)
933 static inline void count_memcg_events(struct mem_cgroup *memcg,
934 enum vm_event_item idx,
939 static inline void count_memcg_page_event(struct page *page,
945 void count_memcg_event_mm(struct mm_struct *mm, enum vm_event_item idx)
948 #endif /* CONFIG_MEMCG */
950 /* idx can be of type enum memcg_stat_item or node_stat_item */
951 static inline void __inc_memcg_state(struct mem_cgroup *memcg,
954 __mod_memcg_state(memcg, idx, 1);
957 /* idx can be of type enum memcg_stat_item or node_stat_item */
958 static inline void __dec_memcg_state(struct mem_cgroup *memcg,
961 __mod_memcg_state(memcg, idx, -1);
964 /* idx can be of type enum memcg_stat_item or node_stat_item */
965 static inline void __inc_memcg_page_state(struct page *page,
968 __mod_memcg_page_state(page, idx, 1);
971 /* idx can be of type enum memcg_stat_item or node_stat_item */
972 static inline void __dec_memcg_page_state(struct page *page,
975 __mod_memcg_page_state(page, idx, -1);
978 static inline void __inc_lruvec_state(struct lruvec *lruvec,
979 enum node_stat_item idx)
981 __mod_lruvec_state(lruvec, idx, 1);
984 static inline void __dec_lruvec_state(struct lruvec *lruvec,
985 enum node_stat_item idx)
987 __mod_lruvec_state(lruvec, idx, -1);
990 static inline void __inc_lruvec_page_state(struct page *page,
991 enum node_stat_item idx)
993 __mod_lruvec_page_state(page, idx, 1);
996 static inline void __dec_lruvec_page_state(struct page *page,
997 enum node_stat_item idx)
999 __mod_lruvec_page_state(page, idx, -1);
1002 /* idx can be of type enum memcg_stat_item or node_stat_item */
1003 static inline void inc_memcg_state(struct mem_cgroup *memcg,
1006 mod_memcg_state(memcg, idx, 1);
1009 /* idx can be of type enum memcg_stat_item or node_stat_item */
1010 static inline void dec_memcg_state(struct mem_cgroup *memcg,
1013 mod_memcg_state(memcg, idx, -1);
1016 /* idx can be of type enum memcg_stat_item or node_stat_item */
1017 static inline void inc_memcg_page_state(struct page *page,
1020 mod_memcg_page_state(page, idx, 1);
1023 /* idx can be of type enum memcg_stat_item or node_stat_item */
1024 static inline void dec_memcg_page_state(struct page *page,
1027 mod_memcg_page_state(page, idx, -1);
1030 static inline void inc_lruvec_state(struct lruvec *lruvec,
1031 enum node_stat_item idx)
1033 mod_lruvec_state(lruvec, idx, 1);
1036 static inline void dec_lruvec_state(struct lruvec *lruvec,
1037 enum node_stat_item idx)
1039 mod_lruvec_state(lruvec, idx, -1);
1042 static inline void inc_lruvec_page_state(struct page *page,
1043 enum node_stat_item idx)
1045 mod_lruvec_page_state(page, idx, 1);
1048 static inline void dec_lruvec_page_state(struct page *page,
1049 enum node_stat_item idx)
1051 mod_lruvec_page_state(page, idx, -1);
1054 #ifdef CONFIG_CGROUP_WRITEBACK
1056 struct list_head *mem_cgroup_cgwb_list(struct mem_cgroup *memcg);
1057 struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb);
1058 void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages,
1059 unsigned long *pheadroom, unsigned long *pdirty,
1060 unsigned long *pwriteback);
1062 #else /* CONFIG_CGROUP_WRITEBACK */
1064 static inline struct wb_domain *mem_cgroup_wb_domain(struct bdi_writeback *wb)
1069 static inline void mem_cgroup_wb_stats(struct bdi_writeback *wb,
1070 unsigned long *pfilepages,
1071 unsigned long *pheadroom,
1072 unsigned long *pdirty,
1073 unsigned long *pwriteback)
1077 #endif /* CONFIG_CGROUP_WRITEBACK */
1080 bool mem_cgroup_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages);
1081 void mem_cgroup_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages);
1083 extern struct static_key_false memcg_sockets_enabled_key;
1084 #define mem_cgroup_sockets_enabled static_branch_unlikely(&memcg_sockets_enabled_key)
1085 void mem_cgroup_sk_alloc(struct sock *sk);
1086 void mem_cgroup_sk_free(struct sock *sk);
1087 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
1089 if (!cgroup_subsys_on_dfl(memory_cgrp_subsys) && memcg->tcpmem_pressure)
1092 if (time_before(jiffies, memcg->socket_pressure))
1094 } while ((memcg = parent_mem_cgroup(memcg)));
1098 #define mem_cgroup_sockets_enabled 0
1099 static inline void mem_cgroup_sk_alloc(struct sock *sk) { };
1100 static inline void mem_cgroup_sk_free(struct sock *sk) { };
1101 static inline bool mem_cgroup_under_socket_pressure(struct mem_cgroup *memcg)
1107 struct kmem_cache *memcg_kmem_get_cache(struct kmem_cache *cachep);
1108 void memcg_kmem_put_cache(struct kmem_cache *cachep);
1109 int memcg_kmem_charge_memcg(struct page *page, gfp_t gfp, int order,
1110 struct mem_cgroup *memcg);
1111 int memcg_kmem_charge(struct page *page, gfp_t gfp, int order);
1112 void memcg_kmem_uncharge(struct page *page, int order);
1114 #if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
1115 extern struct static_key_false memcg_kmem_enabled_key;
1116 extern struct workqueue_struct *memcg_kmem_cache_wq;
1118 extern int memcg_nr_cache_ids;
1119 void memcg_get_cache_ids(void);
1120 void memcg_put_cache_ids(void);
1123 * Helper macro to loop through all memcg-specific caches. Callers must still
1124 * check if the cache is valid (it is either valid or NULL).
1125 * the slab_mutex must be held when looping through those caches
1127 #define for_each_memcg_cache_index(_idx) \
1128 for ((_idx) = 0; (_idx) < memcg_nr_cache_ids; (_idx)++)
1130 static inline bool memcg_kmem_enabled(void)
1132 return static_branch_unlikely(&memcg_kmem_enabled_key);
1136 * helper for accessing a memcg's index. It will be used as an index in the
1137 * child cache array in kmem_cache, and also to derive its name. This function
1138 * will return -1 when this is not a kmem-limited memcg.
1140 static inline int memcg_cache_id(struct mem_cgroup *memcg)
1142 return memcg ? memcg->kmemcg_id : -1;
1146 #define for_each_memcg_cache_index(_idx) \
1149 static inline bool memcg_kmem_enabled(void)
1154 static inline int memcg_cache_id(struct mem_cgroup *memcg)
1159 static inline void memcg_get_cache_ids(void)
1163 static inline void memcg_put_cache_ids(void)
1167 #endif /* CONFIG_MEMCG && !CONFIG_SLOB */
1169 #endif /* _LINUX_MEMCONTROL_H */