From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <ian.campbell@citrix.com>
Subject: Re: Ongoing issue with libvirt-xen driver for Openstack
 Nova
Date: Thu, 16 Apr 2015 10:27:09 +0100
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To: Boris Derzhavets <bderzhavets@hotmail.com>
Cc: Anthony PERARD <anthony.perard@citrix.com>, "xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
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On Thu, 2015-04-16 at 05:14 -0400, Boris Derzhavets wrote:

Please can you not top post.

> Done
> 
> /var/log/xen/xen-hotplug.log:-
> 
> RTNETLINK answers: Device or resource busy
> 
> Thank you.

My usual technique for debugging these sorts of hotplug script issues is
to insert near the top of vif-bridge:
    exec >> /tmp/hotplug.log 2>&1
    echo `date` running vif-bridge $@
    set -x
I hope I recalled the syntax correctly. The "set -x" makes it quite
noisy but gives pretty good clues.

Ian.