tree 9def100fa0e2e082250400d554ac2d2e0488cd21
parent 4df01b06ae4afdb233cc099051305d094f02e793
author Jack Wang <jinpu.wang@profitbricks.com> 1378999792 +0200
committer James Bottomley <JBottomley@Parallels.com> 1382691476 +0100

[SCSI] export device_busy for sdev

If you mutiple devices connect to a host, we might be interested in
have an intensive I/O workload on one disk, and notice starvation on others.
This give the user more hint about current infight io for scsi device.

Signed-off-by: Jack Wang <jinpu.wang@profitbricks.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>