Xen users - Jul 2006 - Kernel panic with kernel 2.6.16-xen3_86.1 in a Dell PE 1850

Hi,

I''m getting a kernel panic when booting a Dell PowerEdge 1850 with
kernel 2.6.16-xen3_86.1 which I installed from the
xen-3.0-x86_32-rhel4.1.bin.tar package I got from XenSource.

My /boot/grub/grub.conf configuration is this:

	title Xen (2.6.16-xen3_86.1)
	        root (hd0,0)
	        kernel /xen-3.gz com1=115200,8n1 noreboot
	        module /vmlinuz-2.6.16-xen3_86.1_rhel4.1 root=/dev/VolGroup00/LogVol00
ro maxcpus=1 console=tty1 console=ttyS0,115200n8 dom0_mem=1G
	        module /initrd-2.6.16-xen3_86.1_rhel4.1.img

The boot messages just before the kernel panic are the following.
(I''ve written them down by hand because I don''t have a serial
connection to the server.)

	scsi[0]: scanning scsi channel 1 [virtual] for logical drives
	  Vendor: MegaRAID  <...>
	  Type:   Direct-Access  <...>
	SCSI device sda: 143114240 512-byte hdwr sectors (73274 MB)
	sda: Write Protect is off
	sda: asking for cache data failed
	sda: assuming drive cache: write through
	SCSI device sda: 143114240 512-byte hdwr sectors (73274 MB)
	sda: Write Protect is off
	sda: asking for cache data failed
	sda: assuming drive cache: write through
	 sda: sda1 sda2 sda3
	sd 0:1:0:0: Attached scsi disk sda
	Kernel panic - not syncing: Attempred to kill init!

Just for reference I''m attaching the /var/log/dmesg file after I
rebooted the machine using the original Red Hat Enterprise Linux AS
(2.6.9-5.ELsmp) kernel.  The messages are almost the same until the
''kernel panic'' one.

I''m thinking about building the kernel from scratch instead of relying
on the binaries provided.  But I''m afraid that the pristine 2.6.16
kernel that will be used isn''t the most apropriate for this server.
Perhaps I should try to use the RHEL4 source package and apply the xen
patch to it... 

I''m not sure about what to do first now...

Thank you for any suggestion.

-- 
Gustavo Leite de Mendonça Chaves
CPqD - Gerência de Tecnologia da Informação
Tel.: +55 19 3705-7003 / Fax: +55 19 3705-6113
gustavo@cpqd.com.br
www.cpqd.com.br


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> Hi,
  > I''m getting a kernel panic when booting a Dell PowerEdge 1850
with
  > kernel 2.6.16-xen3_86.1 which I installed from the
  > xen-3.0-x86_32-rhel4.1.bin.tar package I got from XenSource.

  > <...>

  > I''m thinking about building the kernel from scratch instead of
relying
  > on the binaries provided.  But I''m afraid that the pristine
2.6.16
  > kernel that will be used isn''t the most apropriate for this
server.

I just tried it and I got exactly the same result, i.e., a kernel
panic with the same messages in the console.

  > Perhaps I should try to use the RHEL4 source package and apply the
  > xen patch to it...

I want to try this, but since the RHEL4 default kernel is 2.6.9 and
the one I build for xen is 2.6.16 I''m not sure if I should just use
the /boot/config-2.6.9-5.ELsmp before building the 2.6.16 kernel
again... I guess there may be too many different options... Has
anybody tried this before?

Thanks.

Gustavo.


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On Wed, 2006-26-07 at 17:31 -0300, Gustavo Chaves wrote:
>   > Perhaps I should try to use the RHEL4 source package and apply the
>   > xen patch to it...
> 
> I want to try this, but since the RHEL4 default kernel is 2.6.9 and
> the one I build for xen is 2.6.16 I''m not sure if I should just
use
> the /boot/config-2.6.9-5.ELsmp before building the 2.6.16 kernel
> again... I guess there may be too many different options... Has
> anybody tried this before?
I''ve tried that, and it worked (some small errors), but it
wasn''t a
straight drop in.  I had to compare the .configs for the RHEL 4 kernel
to the xen kernel, and add some missing options to the RHEL 4 kernel.  I
eventually got rid of this and went back to the xen default kernels.

Regards,

Ranbir

-- 
Kanwar Ranbir Sandhu
Linux 2.6.17-1.2141_FC4 i686 GNU/Linux 
10:31:54 up 4:01, 2 users, load average: 0.57, 0.26, 0.22 



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