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

[Michael S. Tsirkin]

On Wed, Aug 20, 2014 at 12:18:33PM +0200, Michael S. Tsirkin wrote:
> 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!


Or just post your jprobe script.

> > -- 
> > Best Wishes!
> > Zhang Jie