Subject: Re: [PATCH] virtio-net: put virtio net header inline with data

From: "Michael S. Tsirkin" <[email-masked]>
Date: Thu, 11 Jul 2013 16:00:07 +0300

On Tue, Jul 09, 2013 at 11:46:23AM +0930, Rusty Russell wrote:
> "Michael S. Tsirkin" <[email-masked]> writes:
> > For small packets we can simplify xmit processing
> > by linearizing buffers with the header:
> > most packets seem to have enough head room
> > we can use for this purpose.
> > Since existing hypervisors require that header
> > is the first s/g element, we need a feature bit
> > for this.
> >
> > Signed-off-by: Michael S. Tsirkin <[email-masked]>
> > ---
> >
> > Note: this needs to be applied on top of patch
> > defining VIRTIO_F_ANY_LAYOUT - bit to be
> > selected by Rusty.
> >
> > The following patch should work for any definition of
> > VIRTIO_F_ANY_LAYOUT - I used bit 31 for testing.
> > Rusty, could you please pick a valid bit for VIRTIO_F_ANY_LAYOUT
> > and squeeze this patch into 3.11?
> 
> Sorry, it's too late.
> 
> First, I've been a bit lax in sending patches via DaveM, and this is
> definitely his territory (ie. more net than virtio).
> 
> Secondly, it needs baking and testing time.
> 
> Cheers,
> Rusty.

Okay. But we can already commit the qemu change, right?
Also, can you submit the spec update please?