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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
70ddf637 AV |
2 | #ifndef __LINUX_VMPRESSURE_H |
3 | #define __LINUX_VMPRESSURE_H | |
4 | ||
5 | #include <linux/mutex.h> | |
6 | #include <linux/list.h> | |
7 | #include <linux/workqueue.h> | |
8 | #include <linux/gfp.h> | |
9 | #include <linux/types.h> | |
10 | #include <linux/cgroup.h> | |
fba94807 | 11 | #include <linux/eventfd.h> |
70ddf637 AV |
12 | |
13 | struct vmpressure { | |
14 | unsigned long scanned; | |
15 | unsigned long reclaimed; | |
8e8ae645 JW |
16 | |
17 | unsigned long tree_scanned; | |
18 | unsigned long tree_reclaimed; | |
70ddf637 | 19 | /* The lock is used to keep the scanned/reclaimed above in sync. */ |
22f2020f | 20 | struct spinlock sr_lock; |
70ddf637 AV |
21 | |
22 | /* The list of vmpressure_event structs. */ | |
23 | struct list_head events; | |
24 | /* Have to grab the lock on events traversal or modifications. */ | |
25 | struct mutex events_lock; | |
26 | ||
27 | struct work_struct work; | |
28 | }; | |
29 | ||
30 | struct mem_cgroup; | |
31 | ||
32 | #ifdef CONFIG_MEMCG | |
8e8ae645 | 33 | extern void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree, |
70ddf637 AV |
34 | unsigned long scanned, unsigned long reclaimed); |
35 | extern void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio); | |
36 | ||
37 | extern void vmpressure_init(struct vmpressure *vmpr); | |
33cb876e | 38 | extern void vmpressure_cleanup(struct vmpressure *vmpr); |
70ddf637 AV |
39 | extern struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg); |
40 | extern struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr); | |
59b6f873 | 41 | extern int vmpressure_register_event(struct mem_cgroup *memcg, |
70ddf637 AV |
42 | struct eventfd_ctx *eventfd, |
43 | const char *args); | |
59b6f873 | 44 | extern void vmpressure_unregister_event(struct mem_cgroup *memcg, |
70ddf637 AV |
45 | struct eventfd_ctx *eventfd); |
46 | #else | |
8e8ae645 | 47 | static inline void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree, |
70ddf637 AV |
48 | unsigned long scanned, unsigned long reclaimed) {} |
49 | static inline void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, | |
50 | int prio) {} | |
51 | #endif /* CONFIG_MEMCG */ | |
52 | #endif /* __LINUX_VMPRESSURE_H */ |