[Xen-users] Best way to change kernel in DomU

[Thomas Olschewski <to@xxxxxxxxxx>]

Hello,

my situation:

Distribution: openSuse 10.3
xen 3.1
1x Dom0: kernel 2.6.22.19
2x DomU: kernel 2.6.22.19

Now I want to create a third DomU containing an openSuse 11.2. This 
distributuon is equipped with a PAE-enabled kernel only, while the 
existing Dom0 and DomUs use kernel without PAE. This leads to a error
xc_dom_compat_check: guest type xen-3.0-x86_32 not supported by xen kernel

Because the 11.2 openSuse is not equipped with non-PAE kernel, I'd like 
to change the existing Dom0 and DomUs to PAE-enabled kernels as well.
Changing Dom0 was easy. Of course I get now the xc_dom_compat_check 
errors when trying to start the existing DomUs.
I wonder what the best way is to change the kernel of the DomUs? 2 
solutions I am thinking about are:
1. In the config files used for creation of DomUs the loaded kernel is 
named "vmlinuz-xen" and the initrd "initrd-xen". I could rename 
filenames of PAE-enabled kernel and initrd to that names in the 
filesystem of the DomU.
2. I could change the config-files and create new vms.

I'm sure there are better ways for the change of a kernel used in the 
DomUs. Or should I use one of the two above?

Thomas

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