Re: Fedora 11 Alpha on KVM-84

[Mark McLoughlin <markmc@redhat.com>]

On Sun, 2009-02-22 at 16:35 -0300, Marcelo Tosatti wrote:
> On Sat, Feb 21, 2009 at 08:59:49PM +0100, Fabian Deutsch wrote:
> > Hey,
> > 
> > Am Samstag, den 21.02.2009, 14:53 -0500 schrieb Mark Bidewell:
> > > I tried installing Fedora 11 Alpha in KVM-84 however Anaconda hard
> > > crashes when installing packages.

Mark, can you confirm that this is the same as either of the issues
reported by Fabian? Was this a LiveCD install or ... ?

> > > Installing F10 and updating to Rawhide in KVM yields guest kernel 
> > > errors.  

Could you post the errors you see?

> > > I had similar problems in
> > > the F9 to F10 step.  I was wondering if anyone else had seen this or
> > > what I could do to debug it?

The best way to debug such issues is to use a serial console - if you're
using libvirt, that should already be available to the guest and you
just need to add "console=ttyS0" to the kernel command line.

> > Yes. I recognized this problem.
> > You might have a look at :
> > 
> > https://bugzilla.redhat.com/show_bug.cgi?id=476433

Your report has an identical anaconda stack trace to a previous
bare-metal F10 bug ... I don't think it's KVM specific.

> > and
> > 
> > https://bugzilla.redhat.com/show_bug.cgi?id=484721

We need some more detail on this one, I think - e.g. where does anaconda
hang? Can you get an strace of anaconda?

> > I've also tried those setups with kvm master.
> 
> This errors are probably caused by a paravirt mmu bug which is fixed in
> linux-2.6.git.

Hmm, I'm not sure why you think that ... the pvmmu issue had a very
specific kernel oops signature, right?

  https://bugzilla.redhat.com/480822

> Mark, is the fix part of recent FC11 kernels?

If you mean the flush_lazy_mmu_mode() fix, then yep it first appeared in
v2.6.29-rc5-git1:

  http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=4f06b0436b

Cheers,
Mark.