VM hanging with nested Virt

[Joe Giordano]

I am currently utilizing the following nested solution and seeing my VMs 
hanging on OS Installation, Looks like I am hitting 
https://bugzilla.redhat.com/show_bug.cgi?id=922075 -

L0 - Lenovo Laptop T530i -
F19 - 3.11.3-201.fc19.x86_64
libvirt-1.0.5.6-2.fc19.x86_64
qemu-kvm-1.4.2-11.fc19.x86_64

L1 -
1) mgr -  rhevm-3.1.0-43.el6ev.noarch / RHEL 6.4 - 2.6.32-358.el6.x86_64
2) rhev-h 6.4-20130815.0.el6_4 (actual VM is using VMX and is a KVM based vm not a qemu)

I am wondering if there is any work around or others experience.

-Joe

[Kashyap Chamarthy]

On 10/16/2013 06:17 PM, Joe Giordano wrote:
> I am currently utilizing the following nested solution and seeing my VMs hanging on OS
> Installation, Looks like I am hitting https://bugzilla.redhat.com/show_bug.cgi?id=922075 -
>
> L0 - Lenovo Laptop T530i -
> F19 - 3.11.3-201.fc19.x86_64
> libvirt-1.0.5.6-2.fc19.x86_64
> qemu-kvm-1.4.2-11.fc19.x86_64
>
> L1 -
> mgr -  rhevm-3.1.0-43.el6ev.noarch / RHEL 6.4 - 2.6.32-358.el6.x86_64
> rhev-h 6.4-20130815.0.el6_4 (actual VM is using VMX and is a KVM based vm not a qemu)

FWIW, without RHEV-M, and no graphics, I'm able to run a multiple L2 guests in parallel
without the guests being crashed. Of-course, my hardware is different (using latest Intel
Haswell). And I'm using latest KVM from git.

(That's one of the things with nested virt - too many test combinations to try.)
> I am wondering if there is any work around or others experience.
>
> -Joe
>
> virt mailing list
> [e-mail]
> https://admin.fedoraproject.org/mailman/listinfo/virt

[Cole Robinson]

On 10/29/2013 12:17 PM, Kashyap Chamarthy wrote:
> On 10/16/2013 06:17 PM, Joe Giordano wrote:
> > I am currently utilizing the following nested solution and seeing my VMs hanging on OS
> > Installation, Looks like I am hitting https://bugzilla.redhat.com/show_bug.cgi?id=922075 -
> >
> > L0 - Lenovo Laptop T530i -
> > F19 - 3.11.3-201.fc19.x86_64
> > libvirt-1.0.5.6-2.fc19.x86_64
> > qemu-kvm-1.4.2-11.fc19.x86_64
> >
> > L1 -
> > mgr -  rhevm-3.1.0-43.el6ev.noarch / RHEL 6.4 - 2.6.32-358.el6.x86_64
> > rhev-h 6.4-20130815.0.el6_4 (actual VM is using VMX and is a KVM based vm not a qemu)
>
> FWIW, without RHEV-M, and no graphics, I'm able to run a multiple L2 guests in parallel
> without the guests being crashed. Of-course, my hardware is different (using latest Intel
> Haswell). And I'm using latest KVM from git.
>
> (That's one of the things with nested virt - too many test combinations to try.)

Apparently kernel 3.12 is in much better shape for nested vmx, so if anyone is
hitting issues I'd recommend updating to that kernel.

- Cole