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