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Date: Wed, 27 Aug 2014 13:54:46 +0200
From: "Michael S. Tsirkin" <mst@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH V3] vhost_net: start/stop guest notifiers
	properly
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To: "Zhangjie (HZ)" <zhangjie14@huawei.com>
Cc: Jason Wang <jasowang@redhat.com>, qemu-devel@nongnu.org, William Dauchy <wdauchy@gmail.com>

On Wed, Aug 20, 2014 at 05:23:21PM +0800, Zhangjie (HZ) wrote:
> On 2014/8/19 12:56, Jason Wang wrote:
> > commit a9f98bb5ebe6fb1869321dcc58e72041ae626ad8 vhost: multiqueue
>  call it before setting
> > Zhang Jie, please test this patch to see if it fixes the issue.
> 
> > +static void vhost_net_set_vq_index(struct vhost_net *net, int vq_index)
> > +{
> > +    net->dev.vq_index = vq_index;
> > +}
>                           int vq_index)
> > ...
> Because of vhost_net_set_vq_index, VM can be start successfully.
> But, after about 80 times of migration under my environment, virtual nic became unreachable again.
> When I use jprobe to notify tap, the virtual nic becomes reachable again. This shows that interrupts missing causes
> the problem.

What about the patch
	net: Forbid dealing with packets when VM is not
does it help if you additionally apply that one?

> -- 
> Best Wishes!
> Zhang Jie