Re: [Xen-users] Upgrading xen from CentOS 5.0 to 5.2

[Sadique Puthen <sputhenp@xxxxxxxxxx>]

Alain Barthe wrote:
> Hi,
>
> We are planning to upgrade our dom0s from CentOS5.0 to CentOS 5.2, 
> using the xen version shipped with the OS : the RPM versions are 
> respectively 3.0.3-25.el5 and 3.0.3-64.el5_2.1, I don't know exactly 
> to which version of Xen it corresponds (but it should be further than 
> 3.0.3, right ?).
Hypervisor is at 3.1.2. Don't believe the numbers in the rpms.

> Kernel versions are resp. 2.6.18-8.el5xen and 2.6.18-92.el5xen.
>
> As we want to avoid any interruption of service, domUs must be live 
> migrated from the old version to the newer one, and also back if 
> something wrong happens.
> Live migration from 5.0 to 5.2 is OK, but not 5.2 to 5.0. In this 
> case, all looks like fine on the from dom0, but the domU never appears 
> on the target dom0, with the following error in the logs:
> [2008-08-20 09:40:57 xend 23799] INFO (XendCheckpoint:239) Reloading 
> memory pages:   0%
> [2008-08-20 09:41:02 xend 23799] INFO (XendCheckpoint:239) Error when 
> reading region pfn types: 14
> [2008-08-20 09:41:02 xend 23799] INFO (XendCheckpoint:239) Restore 
> exit with rc=1
> (...)
>
> I tried with a CentOS5.0 domU and a CentOS5.2 one : same result.
>
> My question is: is it normal, or do I miss something ? Is there a way 
> to make this working ?
> Thanks for your replies.
>
> Alain.
>
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