[Libguestfs] Double fault panic in L2 upon v2v conversion

Richard W.M. Jones rjones at redhat.com
Thu Jan 16 15:23:41 UTC 2014


On Wed, Jan 15, 2014 at 04:35:29PM +0200, Rom Freiman wrote:
> Hi everybody,
> 
> Wanted to hear your opinion and to receive a smart advice.
> 
> I'm trying to use virt-v2v in order to convert ova image (exported from
> vcenter) to run on libvirt/kvm - all this inside a VM of fedora.
> The converted image is also a fedora.
> During the conversion process, in some point of libguestfs activity, I get
> double fault panic from L2 (printed as part of libguest output) and the
> conversion process fails - no errors appear neither in L0 not in L1 message
> logs.

Are you using nested KVM?

Kashyap (CC'd) has done a lot of testing on nested KVM on *Intel*,
never with satisfactory results.  It just doesn't work very well.

On AMD is a different story -- nested KVM just works.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Fedora Windows cross-compiler. Compile Windows programs, test, and
build Windows installers. Over 100 libraries supported.
http://fedoraproject.org/wiki/MinGW




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