Re: [Xen-users] Kernel panics and blank /var/log/messages?

[Yoav Felberbaum <mailinglists@xxxxxxxxxx>]

On 24 Oct 2006, at 16:19, Muli Ben-Yehuda wrote:

> On Tue, Oct 24, 2006 at 02:14:54PM +0100, Yoav Felberbaum wrote:
> > Hello,
> >
> > My Xen-ified kernel (3.0.3) on a dedicated host seems to be kernel-
> > panicing upon boot. Since IPMI/SOL seems to be nonfunctional in the
> > Xen kernel, I cannot tell what is causing the kernel to panic.
> SOL works (for SOL definitions of works...) fine for me on an IBM
> x366. What are your Xen and Linux command line options? do you have
> SOL working with a stock Linux kernel?
Yes - it works on a default RHEL kernel. I've tried several times to  
fix it to no luck...
---
default 4
timeout=10
#splashimage=(hd0,0)/grub/splash.xpm.gz
#hiddenmenu
serial --unit=1 --speed=19200 --word=8 --parity=no --stop=1
terminal --timeout=10 console serial
<SNIP>
title Red Hat Enterprise Linux ES (2.6.9-42.0.3.ELsmp)
        root (hd0,0)
        kernel /vmlinuz-2.6.9-42.0.3.ELsmp ro root=LABEL=/  
console=tty0 console=ttyS1,19200n8
        initrd /initrd-2.6.9-42.0.3.ELsmp.img
<SNIP>
title Xen 3.0 / XenLinux 2.6
        root (hd0,0)
        kernel /xen-3.0.gz dom0_mem=192M
        module /vmlinuz-2.6.16-xen ro root=LABEL=/ console=tty0  
console=ttyS1,19200n8
        module /initrd-2.6.16.29-xen.img
----

> > So I thought I'd check /var/log/messages. But to my surprise, that
> > also seems to have no output for any messages generated by the Xen
> > kernel. Why? (The default RHEL4.4 kernels seems to log to this file
> > just fine, and I've checked syslog.conf which looks fine).
> If you panic before mounting the root file system, there's no file
> system to write the log output to.
D'oh, good point. *Sighs* Guess I'm up a creek without a paddle.

Y.

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