From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: Dom0 crash with old style AMD NUMA detection
Date: Fri, 14 Sep 2012 14:58:22 -0400
Message-ID: <20120914185822.GA7495@phenom.dumpdata.com>
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	<20120803123628.GB10670@andromeda.dapyr.net>
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To: Konrad Rzeszutek Wilk <konrad@darnok.org>
Cc: Andre Przywara <andre.przywara@amd.com>, Jeremy Fitzhardinge <jeremy@goop.org>, xen-devel <xen-devel@lists.xen.org>
List-Id: xen-devel@lists.xenproject.org

> > > [    0.000000] Kernel panic - not syncing: Attempted to kill the idle task!
> > > (XEN) Domain 0 crashed: 'noreboot' set - not rebooting.
> > > 
> > > 
> > > 
> > > The obvious solution would be to explicitly deny northbridge scanning 
> > > when running as Dom0, though I am not sure how to implement this without 
> > > upsetting the other kernel folks about "that crappy Xen thing" again ;-)
> > 
> > Heh.
> > Is there a numa=0 option that could be used to override it to turn it
> > off?
> 
> Not compile tested.. but was thinking something like this:

ping?
> 
> diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
> index 43fd630..838cc1f 100644
> --- a/arch/x86/xen/setup.c
> +++ b/arch/x86/xen/setup.c
> @@ -17,6 +17,7 @@
>  #include <asm/e820.h>
>  #include <asm/setup.h>
>  #include <asm/acpi.h>
> +#include <asm/numa.h>
>  #include <asm/xen/hypervisor.h>
>  #include <asm/xen/hypercall.h>
>  
> @@ -528,4 +529,7 @@ void __init xen_arch_setup(void)
>  	disable_cpufreq();
>  	WARN_ON(set_pm_idle_to_default());
>  	fiddle_vdso();
> +#ifdef CONFIG_NUMA
> +	numa_off = 1;
> +#endif
>  }