Re: [Qemu-devel] [PATCH V3] vhost_net: start/stop guest notifiers properly

[Michael S. Tsirkin]

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.

Could you please clarify what do you mean by "notify tap" here?
Thanks!

> -- 
> Best Wishes!
> Zhang Jie