| Anton Vorontsov | 70ddf63 | 2013-04-29 15:08:31 -0700 | [diff] [blame] | 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. */ |
| Michal Hocko | 22f2020 | 2013-07-31 13:53:48 -0700 | [diff] [blame] | 15 | struct spinlock sr_lock; |
| Anton Vorontsov | 70ddf63 | 2013-04-29 15:08:31 -0700 | [diff] [blame] | 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); |
| Michal Hocko | 33cb876 | 2013-07-31 13:53:51 -0700 | [diff] [blame] | 33 | extern void vmpressure_cleanup(struct vmpressure *vmpr); |
| Anton Vorontsov | 70ddf63 | 2013-04-29 15:08:31 -0700 | [diff] [blame] | 34 | extern struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg); |
| 35 | extern struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr); |
| 36 | extern struct vmpressure *css_to_vmpressure(struct cgroup_subsys_state *css); |
| Tejun Heo | 81eeaf0 | 2013-08-08 20:11:26 -0400 | [diff] [blame] | 37 | extern int vmpressure_register_event(struct cgroup_subsys_state *css, |
| 38 | struct cftype *cft, |
| Anton Vorontsov | 70ddf63 | 2013-04-29 15:08:31 -0700 | [diff] [blame] | 39 | struct eventfd_ctx *eventfd, |
| 40 | const char *args); |
| Tejun Heo | 81eeaf0 | 2013-08-08 20:11:26 -0400 | [diff] [blame] | 41 | extern void vmpressure_unregister_event(struct cgroup_subsys_state *css, |
| 42 | struct cftype *cft, |
| Anton Vorontsov | 70ddf63 | 2013-04-29 15:08:31 -0700 | [diff] [blame] | 43 | struct eventfd_ctx *eventfd); |
| 44 | #else |
| 45 | static inline void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, |
| 46 | unsigned long scanned, unsigned long reclaimed) {} |
| 47 | static inline void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, |
| 48 | int prio) {} |
| 49 | #endif /* CONFIG_MEMCG */ |
| 50 | #endif /* __LINUX_VMPRESSURE_H */ |