RE: [Xen-users] Uname shows 64bits rather than 32 : yum problem. 32 bits on dom0 64 bits is it possible ?

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

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Pascal
> Sent: 17 June 2007 17:43
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-users] Uname shows 64bits rather than 32 : yum 
> problem. 32 bits on dom0 64 bits is it possible ?
> 
> Hello,
> 
> I have a centos5 xen 3.0.3
> 
> The dom0 is a 64bits.
> 
> Is it possile to install a 32bits guest ?

You can run 32-bit HVM guests with no problem, but only 64-bit
paravirtual guests. In 3.1 there is support to run 32-bit PAE guests,
but non-PAE is still not allowed. The non-PAE is more problematic to
implement due to page-table format issues. The PAE-guests use the same
page-table format as 64-bit [except for 64-bit having one more level of
page-table entries], which makes a lot of the code exactly the same.

> 
> I ask this becasue I have installed a 32bits guets but when I 
> do a uname -a on the guest i have this :
> Linux fqdn.domain.com 2.6.18-8.1.6.el5xen #1 SMP Thu Jun 14 
> 18:01:24 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
> 
> it looks like it shows exactly the same info than the dom0
> 
> It is a problem because yum, on the guest, looks for 64bits 
> packages rather than 386 ones
> 
> Si it normal ?
> How to tell to yum to look for i386 ?

As described above, you can't. 

However, with very few exceptions, 64-bit guests should be able to run
32-bit apps just fine. 

--
Mats
> 
> Thanks
> Pascal
> 
> 
> 
> 



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