59b6f87344
cgroup_event is now memcg specific. Replace cgroup_event->css with ->memcg and convert [un]register_event() callbacks to take mem_cgroup pointer instead of cgroup_subsys_state one. This simplifies the code slightly and makes css_to_vmpressure() unnecessary which is removed. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Li Zefan <lizefan@huawei.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.cz>
49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
#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;
|
|
/* 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,
|
|
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,
|
|
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 */
|