Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
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
11struct vmpressure {
12 unsigned long scanned;
13 unsigned long reclaimed;
14 /* The lock is used to keep the scanned/reclaimed above in sync. */
15 struct spinlock 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
25struct mem_cgroup;
26
27#ifdef CONFIG_MEMCG
28extern void vmpressure(gfp_t gfp, struct mem_cgroup *memcg,
29 unsigned long scanned, unsigned long reclaimed);
30extern void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio);
31
32extern void vmpressure_init(struct vmpressure *vmpr);
33extern void vmpressure_cleanup(struct vmpressure *vmpr);
34extern struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg);
35extern struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr);
36extern struct vmpressure *css_to_vmpressure(struct cgroup_subsys_state *css);
37extern int vmpressure_register_event(struct cgroup_subsys_state *css,
38 struct cftype *cft,
39 struct eventfd_ctx *eventfd,
40 const char *args);
41extern void vmpressure_unregister_event(struct cgroup_subsys_state *css,
42 struct cftype *cft,
43 struct eventfd_ctx *eventfd);
44#else
45static inline void vmpressure(gfp_t gfp, struct mem_cgroup *memcg,
46 unsigned long scanned, unsigned long reclaimed) {}
47static inline void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg,
48 int prio) {}
49#endif /* CONFIG_MEMCG */
50#endif /* __LINUX_VMPRESSURE_H */