Hi Shaohua,
You wrote:
> BTW: blkdev_issue_zeroout retries if we immediately find the device doesn't
> support zeroout, but it doesn't retry if submit_bio_wait returns -EOPNOTSUPP.
> Is this correct behavior?
I sent a patch for that yesterday, see "[PATCH] block: cope with WRITE
SAME failing in blkdev_issue_zeroout()" on linux-block. It checks for
-EREMOTEIO, because that's what I hit, but I wonder if it should check
for -EOPNOTSUPP from submit_bio_wait() as well. Can you think of
a case where, given bdev_write_zeroes_sectors() != 0, submit_bio_wait()
would fail with -EOPNOTSUPP and we would want to do explicit zeroing?
Please excuse broken threading.
Thanks,
Ilya
