Re: virtio scsi host draft specification, v3

Paolo Bonzini
2011-06-29T10:07:03Z

On 06/29/2011 12:03 PM, Christoph Hellwig wrote:
> > I agree here, in fact I misread Hannes's comment as "if a driver
> > uses more than one queue it is responsibility of the driver to
> > ensure strict request ordering". If you send requests to different
> > queues, you know that those requests are independent. I don't think
> > anything else is feasible in the virtio framework.
>
> That doesn't really fit very well with the SAM model. If we want
> to use multiple queues for a single LUN it has to be transparent to
> the SCSI command stream. Then again I don't quite see the use for
> that anyway.

Agreed, I see a use for multiple queues (MSI-X), but not for multiple
queues shared by a single LUN.

Paolo