[fedora-virt] 3.13 - Nested KVM (vmx) totally broken?

[Richard W.M. Jones]

On Tue, Mar 04, 2014 at 09:13:40AM +0100, Paolo Bonzini wrote:
> Il 04/03/2014 03:40, Ian Pilcher ha scritto:
> >Is this a known problem?  I just tried using nested vmx for the first
> >time since upgrading my system from F19 (3.12.?? at the time) to F20,
> >and I cannot start any L2 guests.  The L2 guest appears to hang almost
> >immediately after starting, consuming 100% of one of the L1 guest's
> >VCPUs.
> >
> >If I reboot with kernel-3.12.10-300.fc20.x86_64, the problem does not
> >occur.
> >
> >Any known workaround?  (Other than using 3.12.10?)
> 
> There is a fix on the way to the 3.13 kernel.
> 
> You can open a Fedora bug and ask them to include
> http://article.gmane.org/gmane.linux.kernel.stable/82043/raw in the
> kernel.

Thanks for fixing this.  It affects a lot of libguestfs users too.

I opened this bug:

https://bugzilla.redhat.com/show_bug.cgi?id=1073663

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-top is 'top' for virtual machines.  Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://people.redhat.com/~rjones/virt-top