On Tue, 2002-09-03 at 23:02, James Bottomley wrote:
> > And what happens if one command gets some sort of check condition
> > (like medium error, or aborted command) that causes a retry? Will IO's
> > still be correctly ordered?
>
> Retries get eliminated. It should be up to the upper layers (sd or beyond) to
> say whether a retry is done. Since, as you point out, retries automatically
> violate any barrier, it is probably up to the block layer to judge what should
> be done about the problem.
Then we need to give the block layer a lot more information about what
kind of a problem occurred
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