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Re: [Qemu-devel] virtio scsi host draft specification, v3
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] virtio scsi host draft specification, v3 |
Date: |
Wed, 29 Jun 2011 13:31:39 +0300 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Wed, Jun 29, 2011 at 12:06:29PM +0200, Paolo Bonzini wrote:
> 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
Then let's make it explicit in the spec?
--
MST
- Re: [Qemu-devel] virtio scsi host draft specification, v3, (continued)
Re: [Qemu-devel] virtio scsi host draft specification, v3, Michael S. Tsirkin, 2011/06/12
Re: [Qemu-devel] virtio scsi host draft specification, v3, Paolo Bonzini, 2011/06/29
Re: [Qemu-devel] virtio scsi host draft specification, v3, Michael S. Tsirkin, 2011/06/29
Re: [Qemu-devel] virtio scsi host draft specification, v3, Christoph Hellwig, 2011/06/29
Re: [Qemu-devel] virtio scsi host draft specification, v3, Paolo Bonzini, 2011/06/29
Re: [Qemu-devel] virtio scsi host draft specification, v3,
Michael S. Tsirkin <=
Re: [Qemu-devel] virtio scsi host draft specification, v3, Paolo Bonzini, 2011/06/29
Re: [Qemu-devel] virtio scsi host draft specification, v3, Christoph Hellwig, 2011/06/29