RE: [Xen-users] Steps to upgrade Xen?

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Danilo Godec
> Sent: 20 June 2007 21:33
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-users] Steps to upgrade Xen?
> 
> Hi,
> 
> I'm currently using Xen 3.0 that's included in OpenSuSE 10.2. 
> The hosts
> (two of them) are 64-bit Intel based machines.
> 
> I'm running various Linux distributions as guests - most have been
> migrated from existing physical machines and most of them have been
> installed on 32-bit machines. Currently I just use the hosts kernel
> which works in most cases, but creates some problems that I would like
> to avoid.
> 
> Since 3.1 is supposed to support 32-bit guests on 64-bit host, I would
> like to upgrade my hosts to Xen 3.1. I have already managed to compile
> Xen, libs and tools. One of my hosts is running Xen 3.1:
> 
> >  Xen version 3.1.0_15040-13 (root@xxxxxxxxx) (gcc version 
> 4.1.2 20061115 (prerelease) (SUSE Linux)) Wed Jun 20 19:37:22 
> CEST 2007
> >  Latest ChangeSet: 15040
> 
> I've setup one of my guests to run it's own (Xen aware) 32-bit kernel,
> but it doesn't work.:
> 
> > VmError: (2, 'Invalid kernel', 'xc_dom_compat_check: guest 
> type xen-3.0-x86_32 not supported by xen kernel, sorry\n')

Yes, you need x86_32p - that is, the kernel needs to have PAE-mode (aka
64GB memory) enabled. This is due to the difference in page-table layout
in 32 and 32p - the latter is identical to 64-bit, the former is not. 

> 
> It is, however, the original kernel that came with the distro (SuSE
> Linux 10.0) with older Xen version.
> 
> Which kernel do I need to upgrade - Dom0, DomU or both?

DomU. 

> 
> BTW, Xen capabilites on this host are:
> 
> > xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p 
> hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64

Exactly, no xen-3.0-x86_32, only xen-3.0-x86_32p. 

--
Mats
> 
> 
>  Thanks, Danilo
> 
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> http://lists.xensource.com/xen-users
> 
> 
> 



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