tree 11625a25ba8a7c5cd4fe41b54d53506a7982433b
parent 025146e13b63483add912706c101fb0fb6f015cc
author Martin K. Petersen <martin.petersen@oracle.com> 1243027072 -0400
committer Jens Axboe <jens.axboe@oracle.com> 1243027375 +0200

block: Expose stacked device queues in sysfs

Currently stacking devices do not have a queue directory in sysfs.
However, many of the I/O characteristics like sector size, maximum
request size, etc. are queue properties.

This patch enables the queue directory for MD/DM devices.  The elevator
code has been modified to deal with queues that do not have an I/O
scheduler.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>