[libvirt-users] Nested KVM: L0 guest produces kernel BUG on wakeup from managed save (while a nested VM is running)

[Kashyap Chamarthy]

On Fri, Feb 09, 2018 at 12:02:25PM +0100, Florian Haas wrote:
> On Fri, Feb 9, 2018 at 11:48 AM, Kashyap Chamarthy <kchamart at redhat.com> wrote:

[...]

> > I've made some minor edits to clarify a bunch of bits, and a link to the
> > Kernel doc about Intel nVMX.  (Hope that looks fine.)
> 
> I'm sure they it does, but just so you know I currently don't see any
> edits from you on the Nested Guests page. Are you sure you
> saved/published your changes?

Thanks for catching that.  _Now_ it's updated.

    https://www.linux-kvm.org/page/Nested_Guests

(I also didn't have permissions to add external links; had to get that
sorted out with the admin.)

> > You wrote: "L2...which does no further virtualization".  Not quite true
> > — "under right circumstances" (read: sufficiently huge machine with tons
> > of RAM), L2 _can_ in turn L3. :-)
> 
> Insert "normally" between "which" and "does", then. :)

:-)

> > Last time I checked (this morning), Rich W.M. Jones had 4 levels of
> > nesting tested with the 'supernested' program[1] he wrote.  (Related
> > aside: This program is packaged it as part of 2016 QEMU Advent
> > Calendar[2] -- if you want to play around on a powerful test machine
> > with tons of free memory.)
> >
> > [1] http://git.annexia.org/?p=supernested.git;a=blob;f=README
> > [2] http://www.qemu-advent-calendar.org/2016/#day-13
> 
> Interesting, thanks for the pointer!
> 
> Cheers,
> Florian

-- 
/kashyap