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Date: Thu, 12 Dec 2013 15:23:01 +0000
From: Wei Liu <wei.liu2@citrix.com>
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Subject: Re: [Qemu-devel] [Spice-devel] Vdagent not working on xen linux hvm
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To: Fabio Fantoni <fabio.fantoni@m2r.biz>
Cc: Alon Levy <alevy@redhat.com>, xen-devel <xen-devel@lists.xensource.com>, Wei Liu <wei.liu2@citrix.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, spice-devel@lists.freedesktop.org

On Thu, Dec 12, 2013 at 02:10:23PM +0100, Fabio Fantoni wrote:
[...]
> I did some other tests, I narrowed down the commit range to the one between:
> 
> commit c9fea5d701f8fd33f0843728ec264d95cee3ed37 Mon, 22 Jul 2013
> 15:14:18 (Merge remote-tracking branch 'bonzini/iommu-for-anthony')
> where there is virtio net regression with xen
> 
> and
> 
> commit    962b03fcf509db25c847aa67c4eff574c240dcfe Thu, 4 Jul 2013
> 15:42:43 +0000 (xen: Mark fixed platform I/O as unaligned)
> where virtio net is working
> 
> I also tested:
> commit 2562becfc126ed7678c662ee23b7c1fe135d8966 Mon, 15 Jul 2013
> 19:02:41 +0000
> and
> commit dcb117bfda5af6f6ceb7231778d36d8bce4aee93 Thu, 4 Jul 2013
> 15:42:46 +0000
> but qemu crashes on xl create for another error and I haven't found
> which is the commit to apply with git cherry-pick so that I can
> check if the virtio net regression is present.
> 
> Can someone help me please?
> 
> I added also qemu-devel to cc.
> 

I did a quick test with Xen's QEMU, currently at

commit 1c514a7734b7f98625a0d18d5e8ee7581f26e50c
Merge: 79c097d 35bdc13
Author: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Date:   Tue Jun 25 11:34:24 2013 +0000

    Merge remote branch 'perard/cpu-hotplug-port-v2' into xen-staging-master-7

from git://xenbits.xen.org/qemu-upstream-unstable.git

My guest is Squeeze with stock kernel 2.6.32.

vif=['model=virtio-net-pci,bridge=xenbr0']

No pci=nomsi in guest kernel command line.

Everything worked fine. And /proc/interrupts shows that it's indeed
using MSI for virtio PCI.

I'm kind of confused. (And in the long run of this thread I probably
didn't remember everything.)

Wei.

> Thanks for any reply.