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