LCOV - code coverage report
Current view: top level - include/linux - vmpressure.h (source / functions) Hit Total Coverage
Test: combined.info Lines: 0 4 0.0 %
Date: 2022-03-28 16:04:14 Functions: 0 0 -
Branches: 0 2 0.0 %

           Branch data     Line data    Source code
       1                 :            : /* SPDX-License-Identifier: GPL-2.0 */
       2                 :            : #ifndef __LINUX_VMPRESSURE_H
       3                 :            : #define __LINUX_VMPRESSURE_H
       4                 :            : 
       5                 :            : #include <linux/mutex.h>
       6                 :            : #include <linux/list.h>
       7                 :            : #include <linux/workqueue.h>
       8                 :            : #include <linux/gfp.h>
       9                 :            : #include <linux/types.h>
      10                 :            : #include <linux/cgroup.h>
      11                 :            : #include <linux/eventfd.h>
      12                 :            : 
      13                 :            : struct vmpressure {
      14                 :            :         unsigned long scanned;
      15                 :            :         unsigned long reclaimed;
      16                 :            : 
      17                 :            :         unsigned long tree_scanned;
      18                 :            :         unsigned long tree_reclaimed;
      19                 :            :         /* The lock is used to keep the scanned/reclaimed above in sync. */
      20                 :            :         spinlock_t sr_lock;
      21                 :            : 
      22                 :            :         /* The list of vmpressure_event structs. */
      23                 :            :         struct list_head events;
      24                 :            :         /* Have to grab the lock on events traversal or modifications. */
      25                 :            :         struct mutex events_lock;
      26                 :            : 
      27                 :            :         struct work_struct work;
      28                 :            : };
      29                 :            : 
      30                 :            : struct mem_cgroup;
      31                 :            : 
      32                 :            : #ifdef CONFIG_MEMCG
      33                 :            : extern void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree,
      34                 :            :                        unsigned long scanned, unsigned long reclaimed);
      35                 :            : extern void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg, int prio);
      36                 :            : 
      37                 :            : extern void vmpressure_init(struct vmpressure *vmpr);
      38                 :            : extern void vmpressure_cleanup(struct vmpressure *vmpr);
      39                 :            : extern struct vmpressure *memcg_to_vmpressure(struct mem_cgroup *memcg);
      40                 :            : extern struct cgroup_subsys_state *vmpressure_to_css(struct vmpressure *vmpr);
      41                 :            : extern int vmpressure_register_event(struct mem_cgroup *memcg,
      42                 :            :                                      struct eventfd_ctx *eventfd,
      43                 :            :                                      const char *args);
      44                 :            : extern void vmpressure_unregister_event(struct mem_cgroup *memcg,
      45                 :            :                                         struct eventfd_ctx *eventfd);
      46                 :            : #else
      47                 :          0 : static inline void vmpressure(gfp_t gfp, struct mem_cgroup *memcg, bool tree,
      48         [ #  # ]:          0 :                               unsigned long scanned, unsigned long reclaimed) {}
      49                 :          0 : static inline void vmpressure_prio(gfp_t gfp, struct mem_cgroup *memcg,
      50                 :          0 :                                    int prio) {}
      51                 :            : #endif /* CONFIG_MEMCG */
      52                 :            : #endif /* __LINUX_VMPRESSURE_H */

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