| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __LINUX_VMPRESSURE_H |
| #define __LINUX_VMPRESSURE_H |
| |
| #include <linux/mutex.h> |
| #include <linux/list.h> |
| #include <linux/workqueue.h> |
| #include <linux/gfp.h> |
| #include <linux/types.h> |
| #include <linux/cgroup.h> |
| #include <linux/eventfd.h> |
| |
| struct vmpressure { |
| unsigned long scanned; |
| unsigned long reclaimed; |
| |
| unsigned long tree_scanned; |
| unsigned long tree_reclaimed; |
| /* The lock is used to keep the scanned/reclaimed above in sync. */ |
| spinlock_t sr_lock; |
| |
| /* The list of vmpressure_event structs. */ |
| struct list_head events; |
| /* Have to grab the lock on events traversal or modifications. */ |
| struct mutex events_lock; |
| |
| struct work_struct work; |
| }; |
| |
| struct mem_cgroup; |
| |
| #ifdef CONFIG_MEMCG |
| extern void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree, |
| unsigned long scanned, unsigned long reclaimed); |
| extern void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio); |
| |
| extern void vmpressure_init(struct vmpressure *vmpr); |
| extern void vmpressure_cleanup(struct vmpressure *vmpr); |
| extern struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg); |
| extern struct mem_cgroup *vmpressure_to_memcg(struct vmpressure *vmpr); |
| extern int vmpressure_register_event(struct mem_cgroup *memcg, |
| struct eventfd_ctx *eventfd, |
| const char *args); |
| extern void vmpressure_unregister_event(struct mem_cgroup *memcg, |
| struct eventfd_ctx *eventfd); |
| #else |
| static inline void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree, |
| unsigned long scanned, unsigned long reclaimed) {} |
| static inline void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, |
| int prio) {} |
| #endif /* CONFIG_MEMCG */ |
| #endif /* __LINUX_VMPRESSURE_H */ |