On 06/03/2013 11:35 AM, Martin K. Petersen wrote:

quoted

quoted

quoted

quoted

quoted

"hpa" == H Peter Anvin [off-list ref] writes:

hpa> OK, so the device here says don't do this again, but fails the
hpa> request anyway expecting the block device to pick up the slack.

Yes, the block layer function will resort to writing out zeroes directly
in this case.

MD should not consider a rejected WRITE SAME a failure.

Presumably MD should do the same thing that SCSI does: disable
write_same and kick the failure upstack?

	-hpa