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

[Paolo Bonzini]

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.

Paolo