vmpressure.h 1.7 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef __LINUX_VMPRESSURE_H
  3. #define __LINUX_VMPRESSURE_H
  4. #include <linux/mutex.h>
  5. #include <linux/list.h>
  6. #include <linux/workqueue.h>
  7. #include <linux/gfp.h>
  8. #include <linux/types.h>
  9. #include <linux/cgroup.h>
  10. #include <linux/eventfd.h>
  11. struct vmpressure {
  12. unsigned long scanned;
  13. unsigned long reclaimed;
  14. unsigned long tree_scanned;
  15. unsigned long tree_reclaimed;
  16. /* The lock is used to keep the scanned/reclaimed above in sync. */
  17. spinlock_t sr_lock;
  18. /* The list of vmpressure_event structs. */
  19. struct list_head events;
  20. /* Have to grab the lock on events traversal or modifications. */
  21. struct mutex events_lock;
  22. struct work_struct work;
  23. };
  24. struct mem_cgroup;
  25. #ifdef CONFIG_MEMCG
  26. extern void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree,
  27. unsigned long scanned, unsigned long reclaimed);
  28. extern void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio);
  29. extern void vmpressure_init(struct vmpressure *vmpr);
  30. extern void vmpressure_cleanup(struct vmpressure *vmpr);
  31. extern struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg);
  32. extern struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr);
  33. extern int vmpressure_register_event(struct mem_cgroup *memcg,
  34. struct eventfd_ctx *eventfd,
  35. const char *args);
  36. extern void vmpressure_unregister_event(struct mem_cgroup *memcg,
  37. struct eventfd_ctx *eventfd);
  38. #else
  39. static inline void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree,
  40. unsigned long scanned, unsigned long reclaimed) {}
  41. static inline void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg,
  42. int prio) {}
  43. #endif /* CONFIG_MEMCG */
  44. #endif /* __LINUX_VMPRESSURE_H */