Re: [Xen-users] Xen 3.1 SEGV when running old binaries in FC1

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

What kernel are you running in the domU?

Cheers,
Mark

On Friday 08 June 2007, Nick Craig-Wood wrote:
> On Thu, Jun 07, 2007 at 07:05:21PM +0100, Mark Williamson wrote:
> > On Thursday 07 June 2007, Nick Craig-Wood wrote:
> > > I've just built Xen 3.1 x86 32 bit with PAE from source.
> > >
> > > It runs most of my domUs just fine, windows etc, but it doesn't run a
> > > Fedora Core 1 image.  It hangs at 100% cpu usage just after it frees
> > > kernel memory.
> > >
> > > If I mount the FC1 image on dom0 and chroot into it I get
> > >
> > >   # chroot . /bin/bash
> > >   Segmentation fault
> > >
> > > I can chroot into it using ash.static indicating it is something to do
> > > with shared libraries.  I suspect something to do with the mapping of
> > > linux-gate.so.1 which the FC1 binaries need.
> > >
> > > I can run this domain just fine off Xen 3.0.4.
> >
> > FC1 did have some crazy stuff going on (e.g. a 2.4 kernel with NPTL), so
> > I guess it's possible HVM mode isn't handling that right for some reason.
>
> It is a paravirt domain not HVM...
>
> > Is the Xen version the only thing you've changed between the two
> > installs?  If so I guess it could be a regression that'll need bugfixing.
>
> I changed the xen hypervisor and the dom0 and domU kernels.  The I see
> the same SEGV with the dom0 and domU kernels.
>
> Everything else remained the same.
>
> I've put a small ext2 filing system here which demonstrates the problem
>
>   http://www.craig-wood.com/nick/pub/fedora_demo.gz
>
> If mount it and attempt to chroot into it under Xen 3.1 then I get a
> SEGV.  Chrooting into it from Xen 3.0.3 , Xen 3.0.4 and Debian testing
> works fine.



-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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