Re: [Qemu-devel] [PATCH 1/3] pseries: Increase maximum CPUs to 256

[David Gibson]

On Tue, Apr 19, 2011 at 05:02:21PM +0200, Alexander Graf wrote:
> On 04/19/2011 02:44 PM, David Gibson wrote:
> >On Tue, Apr 19, 2011 at 09:38:58AM +0200, Alexander Graf wrote:
> >>On 19.04.2011, at 03:54, David Gibson wrote:
> >>
> >>>From: Anton Blanchard<address@hidden>
> >>>
> >>>The original pSeries machine was limited to 32 CPUs, more or less
> >>>arbitrarily.  Particularly when we get SMT KVM guests it will be
> >>>pretty easy to exceed this.  Therefore, raise the max number of CPUs
> >>>in a pseries machine guest to 256.
> >>Are the 256 limited by technical limits or arbitrary as well? :)
> >Still arbitrary, just bigger.
> 
> Can't we set it to the real, technical limit then?

There is no clear real, technical limit.  It would depend on exactly
what generation of pSeries we're talking about, and be in the
thousands.

-- 
David Gibson                    | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au  | minimalist, thank you.  NOT _the_ _other_
                                | _way_ _around_!
http://www.ozlabs.org/~dgibson