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

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

> -----Original Message-----
> From: Schober Walter [mailto:Walter.Schober@xxxxxxxxx] 
> Sent: 18 May 2007 11:35
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Cc: Petersson, Mats
> Subject: RE: [Xen-users] How do I find out why Dom0 crashes 
> on guest startup?
> 
> Thanks Mats! I can do a remote serial console via iLO2 on com2: but
> cannot cut&paste from it (Hello HP!) - so I have screenshots only (can
> send them on request) ...
> 
> Finally it tells me
> Panic on CPU 2:
> CPU2 FATAL PAGE FAULT
> [error_code=0000]
> Faulting linear address: 000000000000000
> 
> It happens on the 
> (XEN) (GUEST: 1) Starting emulated 16-bit real-mode: ip=0600:000
> 
> Stack Trace can be sent on request as JPG.

I think a stack-trace would be useful here. I suspect its' someplace in
the HVM/VMX (or SVM) code, but it's much easier to tell what's going on
from a stack-trace. 

--
Mats
> 
> br
> Walter
> 
> -----Original Message-----
> From: Petersson, Mats [mailto:Mats.Petersson@xxxxxxx] 
> Sent: Friday, May 18, 2007 12:12 PM
> To: Schober Walter; xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: RE: [Xen-users] How do I find out why Dom0 crashes on guest
> startup?
> 
>  
> 
> > -----Original Message-----
> > From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> > [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> > Schober Walter
> > Sent: 18 May 2007 11:08
> > To: xen-users@xxxxxxxxxxxxxxxxxxx
> > Subject: [Xen-users] How do I find out why Dom0 crashes on 
> > guest startup?
> > 
> > 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. 
> 
> Are you able to get serial output from the server to another machine? 
> 
> If so, set xen to use "console=com1 com1=115200,8n1".
> 
> If not, try adding "noreboot". 
> 
> [Both of these are arguments on the "xen.gz" line in your
> /boot/grub/grub.conf]
> 
> --
> Mats
> > 
> > System: Centos 5 x86_64 @ HP DL360G5, latest yum update done. 
> > 
> > Will attach more info on config, when needed. 
> > 
> > Many thanks! 
> > Walter 
> > 
> > 
> > 
> 
> 
> 
> 
> 



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