[Fedora-xen] fc6xen kernel panic after yum update

[Tauren Mills]

Hello,

I used yum update on a newly installed dual cpu i386 FC6 system a
couple days ago. My system was updated from Fedora Core
2.6.18-1.2798.fc6xen to 2.6.20-1.2948.fc6xen. The update went fine.
After reboot, I got the following kernel panic:

Scanning logical volumes
  Reading all physical volumes. This may take a while...
  No volume groups found
Activating logical volumnes
  Volume group "vg0" not found
Creating root device.
Mounting root filesystem.
mount: could not fine filesystem '/dev/root'
Setting up other filesystems
Setting up new root fs
setuproot: moving /dev failed: No such file or directory
no fstab.sys, mounting internal defaults
setuproot: error mounting /proc failed: No such file or directory
setuproot: error mounting /sys failed: No such file or directory
Switching to new root and running init.
unmounting old /dev
unmounting old /proc
unmounting old /sys
switchroot: mount failed: No such file or directory
Kernel panic - not syncing: Attempted to kill init!

If I'd boot into the original kernel, it booted just fine.

So, today I took a spare system and installed FC6 fresh from
installation disks. The very first thing I did after the installation
was completed was do a yum update. After reboot, the exact same
problem. Both systems don't work with the latest XEN kernel.

For reference, the only packages installed from the graphical
installer were these:

Applications/Editors:
	vim-enhanced

Applications/Text-based Internet:
	lynx

Base System/Base:
	finger
	gnupg
	man-pages
	mdadm
	mlocate
	nfs-utils
	openssh-clients
	oopenssh-server
	rsync
	sudo
	telnet
	wget
	which
	yum
Base System/Virtualization:
	virt-manager	

Since the errors indicate LVM problems, here's info about my disk
layout. I'm configured using two 72GB scsi disks using raid1, then lvm
on top. Disk partitioning:

/dev/sda (72GB)
	/dev/sda1 (102MB)
	/dev/sda2 (69.9GB)
/dev/sdb (72GB)
	/dev/sdb1 (102MB)
	/dev/sdb2 (69.9GB)

/dev/sda1 & /dev/sdb1 are mirrored to /dev/md0
	used by /boot partition (102MB)

/dev/sda2 & /dev/sdb2 are mirrored to physical volume /dev/md1
	used in VolGroup00

/dev/md1 is LVM VolGroup00 and contains these logical volumes
	/dev/VolGroup00/lvdom0 (root)		3GB
	/dev/VolGroup00/lvswap0 (swap)		4GB

The rest of the space was left empty for xen guest partitions.

I've edited grub.conf to use /dev/mapper vs /dev/VolGroup00, but
nothing has booted with the new kernel.

Is there a problem with the new kernel? Where should I go for a
solution? Should I just run the old kernel for now? If I'm not in the
best forum for this, where should I go for help?

Any help would be appreciated!

Thanks!