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Re: [Xen-users] Problems upgrading to Xen 3.1
> try "*noreboot*" in your kernel-line (where xen.gz is) in grub.conf.
> Maybe this will give you a clue on what's going on.
Good plan. If any interesting stuff comes out you could just photograph it
with a digital camera. Or for long output (or if you lack regular physical
access) you can use a serial line to capture output from Xen.
> > I've upgraded my Xen system from Xen 3.0.4 to Xen 3.1 by installing a new
> > xen.gz, new xen-tools and new xen-libs for my SLES10 system (using RPMs
> > provided through Novell). However, now the system doesn't boot up any
> > more.
Out of interest, did you uninstall the old Xen? The userspace tools can get
mixed up and broken if you don't remove one version before installing a
different one. It doesn't sound like that's your current problem though, as
what you're seeing happens too early during boot.
> > Basically, it seems to boot the Xen hypervisor (I can see all the
> > (XEN) messages), but then suddenly reboots instead of booting the Dom0
> > kernel. When upgrading to 3.1, do I actually also need to upgrade the
> > Dom0 kernel somehow?
The Xen<->dom0 kernel interface didn't change, so in that respect you don't
need to update the kernel...
However, between 3.0.4 and 3.1 the default memory model changed from being
non-PAE to PAE. My guess is that your new Xen wants a PAE dom0 kernel,
whilst your older dom0 kernel is non-PAE.
The solution here is either to upgrade the kernel to the newer, PAE one that
presumably matches your new Xen packages? Or to try to get some non-PAE Xen
> > If yes then how can I do that?
I'd think there should be appropriate packages available from the same source
you got your other upgrade packages. Have you had any luck finding these?
> > I don't see any
> > errors in the boot logs, as the kernel doesn't even seem to start up at
> > all before the system suddenly reboots.
You'll probably find, once you've put noreboot on the Xen cmdline, that
there's a message saying something like "Xen and dom0 mismatched... Xen is
PAE ... Dom0 is non-PAE". not in exactly those words but something to that
> > Thanks,
> > Anna
> > _______________________________________________
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> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
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