Re: [Qemu-devel] Regression: virtio-pci: convert to ioeventfd callbacks

[Cornelia Huck]

On Wed, 29 Jun 2016 09:41:50 +0800
Jason Wang <address@hidden> wrote:
 
> On 2016年06月27日 17:44, Peter Lieven wrote:
> > Hi, with the above patch applied:
> >
> > commit 9f06e71a567ba5ee8b727e65a2d5347fd331d2aa
> > Author: Cornelia Huck <address@hidden>
> > Date:   Fri Jun 10 11:04:12 2016 +0200
> >
> >     virtio-pci: convert to ioeventfd callbacks
> >
> > a Ubuntu 14.04 VM freezes at startup when blk-mq is set up - even if 
> > there is only one queue.
> >
> > Peter
> >
> >
> 
> In fact, I notice vhost-net does not work for master, look like we are 
> trying to set host notifier without initialization which seems a bug

Yes, that's the problem: We switch handlers, but the notifier has not
yet been setup (that's different from the dataplane call sequence). I
think we need to setup the notifier without touching the handler for
that case. I'm working on a patch.