RE: [Xen-users] How do I find out why Dom0 crashes on guest startup?

["Schober Walter" <Walter.Schober@xxxxxxxxx>]

I have something to confess: I installed qemu (qemu-0.9.0-i386.tar.gz),
too. Needed that qemu-img to convert an raw to a qcow.

Removed all the files from the package now, rebooted then, but still
Dom0 crashes.
The guest crashing the Dom0 is not using that qcow image.

br
Walter

-----Original Message-----
From: Nico Kadel-Garcia [mailto:nkadel@xxxxxxxxx] 
Sent: Friday, May 18, 2007 12:47 PM
To: Schober Walter
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] How do I find out why Dom0 crashes on guest
startup?

Schober Walter wrote:
>
> Before Wednesday all run fine. Then I must have done something - I 
> tried to get rid of those IPMI error messages on starting hpasm, 
> installed the latest RPMs from HP website - but can't tell exactly 
> when it started that the DomU startup crashed my Dom0.
>
> Anyway ... How can I find out now, what exactly causes my Dom0 to
crash? 
> Which logs would tell me that?
>
> /var/log/messages: Sometimes xenbr changes into forwarding of tap0 
> before, sometimes not.
> /var/log/xen/xend.log: The only thing that sounds strange:
> [2007-05-18 11:56:58 xend 3475] DEBUG (XendDomain:153) number of vcpus

> to use is 0
>
> Meanwhile: hp-OpenIMPI, hpasm, hprsm, cmanic removed, OpenIPMI
removed.
>
> Still, the Dom0 crashed (just reboots, no output on Display, SSH 
> connection interrupted) on starting a DomU.
>
> System: Centos 5 x86_64 @ HP DL360G5, latest yum update done.
>
> Will attach more info on config, when needed.
>
> Many thanks!
> Walter
>
RHEL 5, and thus CentOS 5, both have auto-updates turned on by default 
with yum-updatesd. I consider this *insane*, since it will patch things 
without a chance to say "hmm, I'm busy today, let's not do that Xen 
kernel patch right now!".

Can you bring up the machine without Xen and check /var/log/rpmpkgs, 
created by /etc/cron.daily/rpm, to check the software you've installed?

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