Re: Restoring saved guest causes guest to reboot

[Avi Kivity <avi@redhat.com>]

On 05/24/2011 04:02 PM, Joerg Roedel wrote:
> On Tue, May 24, 2011 at 01:42:23PM +0200, Markus Schade wrote:
> >  Hi,
> >
> >  On Tue, 24 May 2011, Joerg Roedel wrote:
> >
> >>>  I could try to also confirm this on AMD X2, but it will take me a little
> >>>  to setup a machine.
> >>
> >>  Your description points to some problem in the kernel. Would be good if
> >>  you could try the same on your AMD X2 to find out if the problem is in
> >>  generic kvm code or in the vmx part.
> >
> >  Okay, it seems to be an Intel-specific bug. I have tested multiple qemu-kvm
> >  (0.13, 0.14 and 0.14.1) and kernel versions (2.6.37.6, 2.6.38.6 and
> >  2.6.39) on an AMD X2 6000+. Neither of them causes the guest to reboot.
> >  Everything works as expected.
>
> Hmm, only 19 patches between .37 and .38 touch vmx.c. Avi, any idea which
> of those patches could cause this?

Might be several.

Markus, can you try a bisect?

The command

  $ git bisect start v2.6.38 v2.6.37 arch/x86/kvm

will generate test kernels for you to compile and run.  There will be 
7-8 tests needed, and most of the compiles should be short (esp. if you 
install ccache).

-- 
error compiling committee.c: too many arguments to function