> >
> > Okay. How would I find what modules are missing ?
> > I don't see any such error in the bootup logs. Any other suggestions
> ?
>
> Start with the boot log. It usually shows you what block devices are
> detected, etc.
> The basic ones for domU (2.6.18 kernel) are xenblk (domU block device)
> and ext3 (or whatever file system you use). For dom0 kernel, it's
> easier to see the output of "lsmod" from your working installation.
I tried lsmod on the Base CentOS 5.3 installation and saw these :
<lsmod>
dm_raid45 66509 0
dm_message 6977 1 dm_raid45
dm_region_hash 15681 1 dm_raid45
dm_log 14529 3 dm_mirror,dm_raid45,dm_region_hash
dm_mod 62201 4 dm_mirror,dm_multipath,dm_raid45,dm_log
dm_mem_cache 9537 1 dm_raid45
ata_piix 23621 0
libata 156933 1 ata_piix
cciss 63813 3
sd_mod 25153 0
scsi_mod 141589 6 scsi_dh,sr_mod,sg,libata,cciss,sd_mod
ext3 124233 1
jbd 56937 1 ext3
<lsmod>
I could not see the dm_raid45, dm_region_hash in the
/lib/modules/2.6.18.8-xen/kernel
Directory. Hence I copied these from /lib/modules/2.6.18-128.el5PAE/.
After this I ran mkinitrd again. I still see the kernel panic, Also I
see a few error
message during bootup : "dm-raid45: disagrees about version of
symbol..."...
Looks like I cant just copy over the modules...
I will try your other suggestions...
-Madhu
>
> >
> >>
> >> - Install RHEL's Xen. This should be pretty straightforward, you'd
> end
> >> up with Xen 3.1+ and a working grub.conf stanza for Xen with RHEL's
> >> kernel-xen
> >> - Install Xen package from gitco (http://www.gitco.de/repo/). You
> can
> >> get Xen 3.4.1 (currently in testing) but still using RHEL's kernel-
> xen
> >> - If that works, you can simply compile another xen kernel as you
> >> like, using either 2.6.18 or later pv_ops kernel. If using 2.6.18,
> you
> >> can use RHEL's kernel-xen config as a base.
> >
> > I didn't want to take this approach. We have standardized on the
> > approach
> > to take with the existing XEN installations and kernel to use.
>
> Standard is fine, if it works. What I'm saying is if you want to find
> out what's wrong (is it Xen userland? kernel version? kernel config?)
> the steps above can help.
>
> > It is
> > confusing
> > that am the only one seeing this issue while it works just fine on
> other
> > Machines. This makes it clear that it is machine specific and am
> missing
> > Some drivers for them. But am clueless on what is that am missing
and
> > how
> > To include them in initrd. Any suggestions ?
>
> For starters, copy RHEL's kernel-xen config to the kernel from xen.org
> (like
http://bits.xensource.com/oss-xen/release/3.4.0/linux-2.6.18-xen-
> 3.4.0.tar.gz).
> That should provide similar set of modules.
>
> Then try running mkinitrd WITHOUT --allow-missing. It should show you
> what modules it thinks you should have but currently missing.
>
> --
> Fajar
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