| 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> |
| Tejun Heo | fba9480 | 2013-11-22 18:20:43 -0500 | [diff] [blame] | 10 | #include <linux/eventfd.h> |
| Anton Vorontsov | 70ddf63 | 2013-04-29 15:08:31 -0700 | [diff] [blame] | 11 | |
| 12 | struct vmpressure { |
| 13 | unsigned long scanned; |
| 14 | unsigned long reclaimed; |
| Johannes Weiner | 8e8ae64 | 2016-01-14 15:21:32 -0800 | [diff] [blame] | 15 | |
| 16 | unsigned long tree_scanned; |
| 17 | unsigned long tree_reclaimed; |
| Vinayak Menon | 5809109 | 2015-03-31 11:06:29 +0530 | [diff] [blame] | 18 | unsigned long stall; |
| Anton Vorontsov | 70ddf63 | 2013-04-29 15:08:31 -0700 | [diff] [blame] | 19 | /* The lock is used to keep the scanned/reclaimed above in sync. */ |
| Michal Hocko | 22f2020 | 2013-07-31 13:53:48 -0700 | [diff] [blame] | 20 | struct spinlock sr_lock; |
| Anton Vorontsov | 70ddf63 | 2013-04-29 15:08:31 -0700 | [diff] [blame] | 21 | |
| 22 | /* The list of vmpressure_event structs. */ |
| 23 | struct list_head events; |
| 24 | /* Have to grab the lock on events traversal or modifications. */ |
| 25 | struct mutex events_lock; |
| 26 | |
| 27 | struct work_struct work; |
| 28 | }; |
| 29 | |
| 30 | struct mem_cgroup; |
| 31 | |
| Vinayak Menon | 13088ad | 2015-03-04 16:38:28 +0530 | [diff] [blame] | 32 | extern int vmpressure_notifier_register(struct notifier_block *nb); |
| 33 | extern int vmpressure_notifier_unregister(struct notifier_block *nb); |
| Johannes Weiner | 8e8ae64 | 2016-01-14 15:21:32 -0800 | [diff] [blame] | 34 | extern void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree, |
| Anton Vorontsov | 70ddf63 | 2013-04-29 15:08:31 -0700 | [diff] [blame] | 35 | unsigned long scanned, unsigned long reclaimed); |
| 36 | extern void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio); |
| 37 | |
| Vinayak Menon | 13088ad | 2015-03-04 16:38:28 +0530 | [diff] [blame] | 38 | #ifdef CONFIG_MEMCG |
| Anton Vorontsov | 70ddf63 | 2013-04-29 15:08:31 -0700 | [diff] [blame] | 39 | extern void vmpressure_init(struct vmpressure *vmpr); |
| Michal Hocko | 33cb876 | 2013-07-31 13:53:51 -0700 | [diff] [blame] | 40 | extern void vmpressure_cleanup(struct vmpressure *vmpr); |
| Anton Vorontsov | 70ddf63 | 2013-04-29 15:08:31 -0700 | [diff] [blame] | 41 | extern struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg); |
| 42 | extern struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr); |
| Tejun Heo | 59b6f87 | 2013-11-22 18:20:43 -0500 | [diff] [blame] | 43 | extern int vmpressure_register_event(struct mem_cgroup *memcg, |
| Anton Vorontsov | 70ddf63 | 2013-04-29 15:08:31 -0700 | [diff] [blame] | 44 | struct eventfd_ctx *eventfd, |
| 45 | const char *args); |
| Tejun Heo | 59b6f87 | 2013-11-22 18:20:43 -0500 | [diff] [blame] | 46 | extern void vmpressure_unregister_event(struct mem_cgroup *memcg, |
| Anton Vorontsov | 70ddf63 | 2013-04-29 15:08:31 -0700 | [diff] [blame] | 47 | struct eventfd_ctx *eventfd); |
| 48 | #else |
| Vinayak Menon | 13088ad | 2015-03-04 16:38:28 +0530 | [diff] [blame] | 49 | static inline struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg) |
| 50 | { |
| 51 | return NULL; |
| 52 | } |
| Anton Vorontsov | 70ddf63 | 2013-04-29 15:08:31 -0700 | [diff] [blame] | 53 | #endif /* CONFIG_MEMCG */ |
| 54 | #endif /* __LINUX_VMPRESSURE_H */ |