Re: [Xen-users] tap device not created during live migration

["Michael A. Collins" <mike.a.collins@xxxxxxxxxxx>]

-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Michael A.
Collins
Sent: Thursday, November 24, 2011 8:32 AM
To: 'xen-users'
Subject: [Xen-users] tap device not created during live migration

I have not done my due diligence in troubleshooting this issue, since it
only happened last night.  I'm posting here after a little searching with no
results.  I have two linux 3.1.10 dom0 running Xen 4.2-unstable and I am
trying to live migrate a Windows HVM domU.  The live migration works and the
domU is running as expected.  The issue I find is that the cooresponding vif
gets created and add to my bridge, but the tap does not.  I don't know
enough about how the migrate process works, so can anyone give me some
pointers on what scripts I need to be worried about and whether the qemu
logs on both dom0's would be of any help?  I'm really hoping that it's an
easy fix.  Thanks Mike P.S. - Happy Turkey Day!!!!


Ok, I have dug a little deeper and found out that if I disable the network
device in the domU, then reenable it I can pass traffic.  Is this something
to do with GPLPV drivers not resuming correctly after the migration?  Also,
why is it that when I create the domU I see that tap interface created, but
when I live migrate I don't?  I wonder if the tap even needs to be created
since I'm using GPLPV drivers...
Mike


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