On 05/06/2011 02:31 PM, Stefan Hajnoczi wrote:
Okay, this explains how you plan to handle targets appearing - you
want to set a maximum number of targets. I was wondering how we would
add virtqueues dynamically (and why the control vqs are placed last at
n,n+1 instead of 0,1).
You don't, it's
On Thu, May 5, 2011 at 3:50 PM, Paolo Bonzini wrote:
> On 05/05/2011 04:29 PM, Hannes Reinecke wrote:
>>>
>>> I chose 1 requestq per target so that, with MSI-X support, each
>>> target can be associated to one MSI-X vector.
>>>
>>> If you want a large number of units, you can subdivide targets int
On 05/05/2011 04:29 PM, Hannes Reinecke wrote:
I chose 1 requestq per target so that, with MSI-X support, each
target can be associated to one MSI-X vector.
If you want a large number of units, you can subdivide targets into
logical units, or use multiple adapters if you prefer. We can have
20-o
Hi all,
On 05/05/2011 02:49 PM, Paolo Bonzini wrote:
Virtqueues
0..n-1:one requestq per target
n:control transmitq
n+1:control receiveq
1 requestq per target makes it harder to support large numbers or
dynamic targets.
I chose 1 requestq per target so that, with MSI-X support, each
target ca
On 05/05/2011 02:50 PM, Christoph Hellwig wrote:
Please don't repeat the barrier mistake done in the Xen and virtio-blk/lguest
protocols. It really doesn't make sense to put this kind of strict odering
in. If we really want ordering let's do it using SCSI ordered tags at least
to use a standard
> #define VIRTIO_SCSI_T_BARRIER 0x8000
>
> The type identifies the remaining fields. The value
> VIRTIO_SCSI_T_BARRIER can be ORed in the type as well. This bit
> indicates that this request acts as a barrier and that all preceding
> requests must be complete befo
Virtqueues
0..n-1:one requestq per target
n:control transmitq
n+1:control receiveq
1 requestq per target makes it harder to support large numbers or
dynamic targets.
I chose 1 requestq per target so that, with MSI-X support, each target
can be associated to one MSI-X vector.
On Thu, May 05, 2011 at 12:28:31AM +0200, Paolo Bonzini wrote:
> Virtio SCSI Controller Device Spec
> ==
>
> The virtio controller device groups together one or more simple virtual
> devices (ie. disk), and allows communicating to these devices using the
> SCSI prot
Here it is at last...
It might be overengineered, I'm waiting for the SCSI experts to tell me
about that. :)
Paolo
Virtio SCSI Controller Device Spec
==
The virtio controller device groups together one or more simple virtual
devices (ie. disk), and allows commu
