/* 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 cgroup_subsys_state *vmpressure_to_css(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 */