Re: [PATCH] scsi_lib.c: continue after MEDIUM_ERROR

[Mark Lord]

James Bottomley wrote:
> For the MD case, this is what REQ_FAILFAST is for.

I cannot find where SCSI honours that flag.  James?

And for that matter, even when I patch SCSI so that it *does* honour it,
I don't actually see the flag making it into the SCSI layer from above.

And I don't see where/how the block layer takes care when considering
merge FAILFAST/READA requests with non FAILFAST/READA requests.
To me, it looks perfectly happy to add non-FAILFAST/READA bios
to a FAILFAST request, risking data loss if a lower-layer decides
to honour the FAILFAST/READA flags.

So it's a pretty Good Thing(tm) that SCSI doesn't currently honour it. ;)


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