Re: [RFC] libata new EH document

Luben Tuikov
2005-09-01T22:09:24Z

On 09/01/05 17:46, Jeff Garzik wrote:
>>>>libata is simply being lazy: while the SCSI core continues to support
>>>>kicking the EH thread when sense is missing, it's preferred for libata
>>>>to reuse that infrastructure.
>>>
>>>
>>>That makes the most sense ;-)
>>
>>
>>For libata it doesn't really matter, since it is _ATA_.
>
> It matters quite a bit. One of the main reasons libata uses the SCSI
> layer is for its infrastructure.

Hmm, maybe I should've been more clear.

> This is the same reason a couple RAID drivers use the SCSI layer. It
> has nothing to do with SCSI-as-defined-by-T10, and more to do with the
> fact that SCSI provides a robust queueing/EH/block interface infrastructure.

You must be kidding! "robust"? What are you comparing this to?

I think it's only because "it's there" and that it provides
a uniform access -- provided by SCSI, _not_ by that particular
SCSI implementation.

> My long term plans include moving some of this not-SCSI-related
> infrastructure from the SCSI layer to the block layer.

Which is that infrastructure?

Luben