Release 4.7 include/linux/vmpressure.h

#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. */
	
struct spinlock 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) {}
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static inline void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg,
				   int prio) {}
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#endif /* CONFIG_MEMCG */
#endif /* __LINUX_VMPRESSURE_H */
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Directory: include/linux

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