1 #ifndef __LINUX_VMPRESSURE_H
2 #define __LINUX_VMPRESSURE_H
4 #include <linux/mutex.h>
5 #include <linux/list.h>
6 #include <linux/workqueue.h>
8 #include <linux/types.h>
9 #include <linux/cgroup.h>
10 #include <linux/eventfd.h>
13 unsigned long scanned;
14 unsigned long reclaimed;
15 /* The lock is used to keep the scanned/reclaimed above in sync. */
16 struct spinlock sr_lock;
18 /* The list of vmpressure_event structs. */
19 struct list_head events;
20 /* Have to grab the lock on events traversal or modifications. */
21 struct mutex events_lock;
23 struct work_struct work;
29 extern void vmpressure(gfp_t gfp, struct mem_cgroup *memcg,
30 unsigned long scanned, unsigned long reclaimed);
31 extern void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio);
33 extern void vmpressure_init(struct vmpressure *vmpr);
34 extern void vmpressure_cleanup(struct vmpressure *vmpr);
35 extern struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg);
36 extern struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr);
37 extern int vmpressure_register_event(struct mem_cgroup *memcg,
38 struct eventfd_ctx *eventfd,
40 extern void vmpressure_unregister_event(struct mem_cgroup *memcg,
41 struct eventfd_ctx *eventfd);
43 static inline void vmpressure(gfp_t gfp, struct mem_cgroup *memcg,
44 unsigned long scanned, unsigned long reclaimed) {}
45 static inline void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg,
47 #endif /* CONFIG_MEMCG */
48 #endif /* __LINUX_VMPRESSURE_H */