tree f41d7d469cb427550656f1d1d2c3b5215a9ea0aa
parent 4363ac7c13a9a4b763c6e8d9fdbfc2468f3b8ca4
author Martin K. Petersen <martin.petersen@oracle.com> 1347985168 -0400
committer Jens Axboe <axboe@kernel.dk> 1348144309 +0200

block: Make blkdev_issue_zeroout use WRITE SAME

If the device supports WRITE SAME, use that to optimize zeroing of
blocks. If the device does not support WRITE SAME or if the operation
fails, fall back to writing zeroes the old-fashioned way.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>