Re: [Xen-users] Attempt to apply xen-patches-2.6.34-4.tar.bz2 to 2.6.34.7 vanilla

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 On 10/10/2010 10:51 AM, Mike Viau wrote:
> > On Sun, 10 Oct 2010 07:35:55 -0700<bderzhavets@xxxxxxxxx>  wrote:
> >
> > Another way to disable this calls via include/linux/cpu.h , having
> > CONFIG_HOTPLUG_CPU=y is to change arch/x86/Kconfig :-
> >
> > --- arch/x86/Kconfig.orig 2010-10-10 18:29:24.490068330 +0400
> > +++ arch/x86/Kconfig 2010-10-10 17:50:22.383715068 +0400
> > @@ -254,8 +254,8 @@
> > def_bool X86_32
> >
> > config ARCH_CPU_PROBE_RELEASE
> > - def_bool y
> > - depends on HOTPLUG_CPU
> > + def_bool n
> > +# depends on HOTPLUG_CPU
> >
> > Boris
> What are the reciprocation of turning off the ability to HOTPLUG_CPU? Is this 
> feature ever used by XEN?
>
> Thanks.
>
> -M
>                                         
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Does it compile as is with CONFIG_HOTPLUG_CPU=n ?

I am curious about this myself. I run the base 2.6.34 kernel (xenified) 
right now.    
http://kerneltrap.org/mailarchive/git-commits-head/2008/10/12/3624204 
was created for being able to build without it set. 
http://lists.xensource.com/archives/cgi-bin/mesg.cgi?a=xen-devel&i=E2263E4A5B2284449EEBD0AAB751098418E5557549%40PDSMSX501.ccr.corp.intel.com 
shows work for physical CPU hot-add on the hypervisor.   This makes me 
think that you could not do any physical hot adding of CPU's but that 
other functionality would not be impacted.  Is it that simple?
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