Re: [Xen-users] Error during guided partitioning

[Mark Pryor <tlviewer@xxxxxxxxx>]

for completeness see below
--- On Wed, 8/25/10, Mark Pryor <tlviewer@xxxxxxxxx> wrote:

> From: Mark Pryor <tlviewer@xxxxxxxxx>
> Subject: Re: [Xen-users] Error during guided partitioning
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Date: Wednesday, August 25, 2010, 3:14 PM
> 
> 
> --- On Wed, 8/25/10, Ryan Chan <ryanchan404@xxxxxxxxx>
> wrote:
> 
> > From: Ryan Chan <ryanchan404@xxxxxxxxx>
> > Subject: [Xen-users] Error during guided partitioning
> > To: xen-users@xxxxxxxxxxxxxxxxxxx
> > Date: Wednesday, August 25, 2010, 8:36 AM
> > I am installing Ubuntu 10.04 in
> > CentOS 5.4 (dom0), everything ok until
> > it tell me to create a partition.
> > 
> > (I am using LVM)
> > 
> > 
> > Error message:
> > 
> > 
> >  Error informing the kernel about modifications
> to
> > partition
> >  /dev/xvda1p1 -- Invalid argument.  This means
> Linux
> > won't know about
> >  any changes you made to /dev/xvda1p1 until you
> reboot --
> > so you
> >  shouldn't mount it or use it in any way before
> rebooting.
> > 
> > 
> 
> Ext4 filesystem is default in 10.04. You will have some
> trouble with pygrub from C5.4 xen.
> 
> Change all lucid filesystems to Ext3 are see what happens.
> 

In your 5.4 dom0, do
#cat /proc/filesystems | grep -i ext

odds are ext4 is absent. Even if you have a custom kernel which supports ext4, 
there is still the question of pygrub ext4 support.

Before posting I checked the gitco xen 3.4.2 libs
pygrub ext4 support is provided by
/usr/lib64/libfsimage.so.1.0.0

------------ snip ----------
# rpm -ql xen-libs | grep -i libfsimage
/usr/lib64/libfsimage.so.1.0
/usr/lib64/libfsimage.so.1.0.0
---------------- cut ---------

The only rough way to tell if there is ext4 support in this lib is by size. In 
3.4.2 the size is

# ls -al /usr/lib64/libfsimage.so.1.0.0
-rwxr-xr-x 1 root root 12448 Nov 11  2009 /usr/lib64/libfsimage.so.1.0.0

suse 11.3 xen 4.0 does have ext4 support in pygrub there the size is 14k+

I have pointed 3.4.2 pygrub at an ext4 /boot and it fails.

-- 
Mark



 

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