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| author | Vivek Goyal <vgoyal@redhat.com> | 2009-12-03 12:59:49 -0500 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-12-03 19:28:52 +0100 |
| commit | 220841906fccafaf4094e87bdb6d252e20cf8c7c (patch) | |
| tree | f25b1f057887cf2a05bb8309e0b757149e052797 /block/blk-cgroup.h | |
| parent | 2868ef7b39490e6b41c2c61cd9a5cd891e778b54 (diff) | |
| download | lwn-220841906fccafaf4094e87bdb6d252e20cf8c7c.tar.gz lwn-220841906fccafaf4094e87bdb6d252e20cf8c7c.zip | |
blkio: Export disk time and sectors used by a group to user space
o Export disk time and sector used by a group to user space through cgroup
interface.
o Also export a "dequeue" interface to cgroup which keeps track of how many
a times a group was deleted from service tree. Helps in debugging.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/blk-cgroup.h')
| -rw-r--r-- | block/blk-cgroup.h | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h index 3573199b298b..b24ab71db826 100644 --- a/block/blk-cgroup.h +++ b/block/blk-cgroup.h @@ -30,7 +30,15 @@ struct blkio_group { #ifdef CONFIG_DEBUG_BLK_CGROUP /* Store cgroup path */ char path[128]; + /* How many times this group has been removed from service tree */ + unsigned long dequeue; #endif + /* The device MKDEV(major, minor), this group has been created for */ + dev_t dev; + + /* total disk time and nr sectors dispatched by this group */ + unsigned long time; + unsigned long sectors; }; #define BLKIO_WEIGHT_MIN 100 @@ -42,24 +50,30 @@ static inline char *blkg_path(struct blkio_group *blkg) { return blkg->path; } +void blkiocg_update_blkio_group_dequeue_stats(struct blkio_group *blkg, + unsigned long dequeue); #else static inline char *blkg_path(struct blkio_group *blkg) { return NULL; } +static inline void blkiocg_update_blkio_group_dequeue_stats( + struct blkio_group *blkg, unsigned long dequeue) {} #endif #ifdef CONFIG_BLK_CGROUP extern struct blkio_cgroup blkio_root_cgroup; extern struct blkio_cgroup *cgroup_to_blkio_cgroup(struct cgroup *cgroup); extern void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg, - struct blkio_group *blkg, void *key); + struct blkio_group *blkg, void *key, dev_t dev); extern int blkiocg_del_blkio_group(struct blkio_group *blkg); extern struct blkio_group *blkiocg_lookup_group(struct blkio_cgroup *blkcg, void *key); +void blkiocg_update_blkio_group_stats(struct blkio_group *blkg, + unsigned long time, unsigned long sectors); #else static inline struct blkio_cgroup * cgroup_to_blkio_cgroup(struct cgroup *cgroup) { return NULL; } static inline void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg, - struct blkio_group *blkg, void *key) + struct blkio_group *blkg, void *key, dev_t dev) { } @@ -68,5 +82,9 @@ blkiocg_del_blkio_group(struct blkio_group *blkg) { return 0; } static inline struct blkio_group * blkiocg_lookup_group(struct blkio_cgroup *blkcg, void *key) { return NULL; } +static inline void blkiocg_update_blkio_group_stats(struct blkio_group *blkg, + unsigned long time, unsigned long sectors) +{ +} #endif #endif /* _BLK_CGROUP_H */ |