Tom might be correct, I checked my system. Using rpm -qa, I did not find Xen, but found libvirt.
At 2012-09-25 21:38:23,"Tom Bryan (tombry)" <tombry_at_[hidden]> wrote:
>On 9/25/12 9:10 AM, "Jeff Squyres (jsquyres)" <jsquyres_at_[hidden]> wrote:
>>>problem, so i fixed it using "--mca btl_tcp_if_include bond0" because I
>>>know this is the high speed network interface I should use on each node.
>>Glad it works for you!
>>If you're not using those interfaces (they might be related to Xen, or
>>something like that?), you might want to disable them.
>YMMV, but on our RHEL machines, I believe that the virbr0 interface is
>coming from the libvirt package.
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