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authorVivek Goyal <vgoyal@redhat.com>2009-12-03 12:59:49 -0500
committerJens Axboe <jens.axboe@oracle.com>2009-12-03 19:28:52 +0100
commit220841906fccafaf4094e87bdb6d252e20cf8c7c (patch)
treef25b1f057887cf2a05bb8309e0b757149e052797 /block/blk-cgroup.h
parent2868ef7b39490e6b41c2c61cd9a5cd891e778b54 (diff)
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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.h22
1 files changed, 20 insertions, 2 deletions
diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index 3573199b298..b24ab71db82 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 */