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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> | |
10 | ||
11 | struct vmpressure { | |
12 | unsigned long scanned; | |
13 | unsigned long reclaimed; | |
14 | /* The lock is used to keep the scanned/reclaimed above in sync. */ | |
15 | struct mutex sr_lock; | |
16 | ||
17 | /* The list of vmpressure_event structs. */ | |
18 | struct list_head events; | |
19 | /* Have to grab the lock on events traversal or modifications. */ | |
20 | struct mutex events_lock; | |
21 | ||
22 | struct work_struct work; | |
23 | }; | |
24 | ||
25 | struct mem_cgroup; | |
26 | ||
27 | #ifdef CONFIG_MEMCG | |
28 | extern void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, | |
29 | unsigned long scanned, unsigned long reclaimed); | |
30 | extern void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio); | |
31 | ||
32 | extern void vmpressure_init(struct vmpressure *vmpr); | |
33 | extern struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg); | |
34 | extern struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr); | |
35 | extern struct vmpressure *css_to_vmpressure(struct cgroup_subsys_state *css); | |
36 | extern int vmpressure_register_event(struct cgroup *cg, struct cftype *cft, | |
37 | struct eventfd_ctx *eventfd, | |
38 | const char *args); | |
39 | extern void vmpressure_unregister_event(struct cgroup *cg, struct cftype *cft, | |
40 | struct eventfd_ctx *eventfd); | |
41 | #else | |
42 | static inline void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, | |
43 | unsigned long scanned, unsigned long reclaimed) {} | |
44 | static inline void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, | |
45 | int prio) {} | |
46 | #endif /* CONFIG_MEMCG */ | |
47 | #endif /* __LINUX_VMPRESSURE_H */ |