RE: [Xen-users] 32bit or 64bit?

["Ulrich Windl" <ulrich.windl@xxxxxxxxxxxxxxxxxxxx>]

On 1 Mar 2007 at 15:11, Kraska, Joe A (US SSA) wrote:

> 
> PAE (which all modern x86 cpus have) will support up to 64GB physical.
> 
> Main restriction is that for an application to support more than 4GB
> of addressable memory on 32 bit PAE systems, they have to be compiled
> a special way. If you don't have any processes which want to address
> more than 4GB, 32 bit PAE will work fine for you.

Unaddressable physical memory is quite uninteresting: You can't mem-map a DVD 
image in 32bit mode, PAE or not.

> 
> I don't think 64bit xen is considered fully baked yet, although it
> certainly is workable for investigation purposes (from experience).

I run SLES10 x86_64 with less trouble than those trying to mess with PAE on 
this 
list it seems.

Regards,
Ulrich


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