diff options
Diffstat (limited to 'kernel/include/linux/vmpressure.h')
| -rw-r--r-- | kernel/include/linux/vmpressure.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/kernel/include/linux/vmpressure.h b/kernel/include/linux/vmpressure.h new file mode 100644 index 000000000..3e4535876 --- /dev/null +++ b/kernel/include/linux/vmpressure.h @@ -0,0 +1,48 @@ +#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 */ |