Re: [Qemu-devel] [PATCH] limit guest cpus for kvm enabled builds

[Anthony Liguori]

Paul Brook wrote:
> On Thursday 09 April 2009, Bruce Rogers wrote:
>   
> > The x86 kvm kernel module limits guest cpu count to 16, but the userspace
> > pc definition says 255 still.  When invoking qemu-kvm with -smp > 16, it
> > prints some error messages, then segfaults.   One of the mistakes is that
> > the error code from kvm_create_vcpu is ignored in ap_main_loop. 
> >     
>
> You should fix that bug then.
>   

I don't see the patch on the mailing list yet, but I'm pretty sure your 
patch is against kvm-userspace.git as ap_main_loop doesn't exist in 
upstream QEMU.

And FWIW, we do properly handle an unsupported -smp value in upstream 
QEMU when using KVM.

Regards,

Anthony Liguori