Xen users - Jan 2011 - CentOS 5.5 x86_64 - XEN DomU LVM ext4 partition support

Hello,

I''m on CentOS 5.5 x86_64 with kernel version 2.6.18-194.32.1.el5xen.  
I''m
trying to setup a DomU on a LVM EXT4 partition for /root.  While launching
the DomU, I can see that the EXT4 kernel module is loaded, but I''m
getting
the following error:

  [code]
Creating root device.
Mounting root filesystem.
EXT3-fs: sda1: couldn''t mount because of unsupported optional features
(240).
mount: error mounting /dev/root on /sysroot as ext3: Invalid argument
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: No such file or directory
setuproot: error mounting /sys: 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!
[/code]

Here''s my DomU config:

[code]
kernel = "/boot/xen-kernel/vmlinuz-2.6.18-194.32.1.el5xen"
ramdisk
"/boot/xen-ramdisk/initrd_centos-ramdisk_2.6.18-194.32.1.el5xen.img"
name = "server12.dev.xen.com"
memory = "1024"
disk = [''phy:VG_DATASTORE/LV_XEN_1,sda1,w'',
''phy:VG_DATASTORE/LV_SWAP_1,sda2,w'']
root = ''/dev/sda1 ro''
vif = [''bridge=xenbr0'', '''']
vcpus = 1
#on_reboot = ''destroy''
#on_crash = ''destroy''
[/code]

Can someone help with this issue?


Thanks


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On Fri, Jan 14, 2011 at 2:46 AM, Aidan Wong <awong@xen.com>
wrote:
> I can see that the EXT4 kernel module is loaded
where does it say that?
>, but I''m getting
> the following error:
>   [code]
> Creating root device.
> Mounting root filesystem.
> EXT3-fs: sda1: couldn''t mount because of unsupported optional
features
> (240).
That shows ext3 module is being used, not ext4.
Try rebuilding initrd using --preload ext4 (or something like that).
Also make sure your fstab has ext4 for "/" instead of auto.

-- 
Fajar

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Hi,

While booting DomU.  I built another LVM EXT3 partition, booted the same
image and that booted fine.  Issue seems to be only with using an LVM EXT4
partition.


Thanks for replying

On Thu, Jan 13, 2011 at 2:09 PM, Fajar A. Nugraha <list@fajar.net> wrote:
> On Fri, Jan 14, 2011 at 2:46 AM, Aidan Wong <awong@xen.com> wrote:
> > I can see that the EXT4 kernel module is loaded
>
> where does it say that?
>
> >, but I''m getting
> > the following error:
> >   [code]
> > Creating root device.
> > Mounting root filesystem.
> > EXT3-fs: sda1: couldn''t mount because of unsupported optional
features
> > (240).
>
> That shows ext3 module is being used, not ext4.
> Try rebuilding initrd using --preload ext4 (or something like that).
> Also make sure your fstab has ext4 for "/" instead of auto.
>
> --
> Fajar
>

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