[Xen-devel] Re: max vcpus in dom0

[Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>]

On Tue, 27 Apr 2010 09:23:19 +0100
"Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

> >>> Mukesh Rathor  04/27/10 4:20 AM >>>
> >Looking at a bug where dom0 is crashing coming up with more than 32
> >vcpus, the problem happens trying to initialize 32nd vcpu. I see
> >the shared info is limited to 32vcpus, implying we'd have a hard
> >limit of 32 vcpus in dom0, correct? 
> 
> That's the legacy limit, yes. Any attempt to go beyond 32 CPUs
> requires the kernel to use the per-vCPU-info-placement hypercall
> prior to bringing up those vCPU-s.
> 
> Jan

Hi Jan,

Yes, I found your patch searching xen-devel implementing
VCPUOP_register_vcpu_info after I posted my msg. However, I don't find
any kernel using this other than pv-ops kernel. So I assume this is
work in progress. If you already have a patch for 2.6.18-xxx, please let
me know, if not, I'll work on it.


thanks,
Mukesh

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