linux-kernel - Re: [patch] x86, numa: Fix CONFIG_DEBUG_PER_CPU

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Date:	Thu, 6 Jan 2011 15:58:12 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Yinghai Lu <yinghai@...nel.org>
cc:	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: Re: [patch] x86, numa: Fix CONFIG_DEBUG_PER_CPU_MAPS without NUMA
 emulation

On Thu, 6 Jan 2011, Yinghai Lu wrote:

> >> "x86, numa: Fake node-to-cpumask for NUMA emulation" broke the build when
> >> CONFIG_DEBUG_PER_CPU_MAPS is set and CONFIG_NUMA_EMU is not.  This is
> >> because it is possible to map a cpu to multiple nodes when NUMA emulation
> >> is used; the patch required a physical node address table to find those
> >> nodes that was only available when CONFIG_NUMA_EMU was enabled.
> >>
> >> This extracts the common debug functionality to its own function for
> >> CONFIG_DEBUG_PER_CPU_MAPS and uses it regardless of whether
> >> CONFIG_NUMA_EMU is set or not.
> >>
> >> NUMA emulation will now iterate over the set of possible nodes for each
> >> cpu and call the new debug function whereas only the cpu's node will be
> >> used without NUMA emulation enabled.
> >>
> >> Reported-by: Ingo Molnar <mingo@...e.hu>
> >> Signed-off-by: David Rientjes <rientjes@...gle.com>
> > 
> > Ingo, do you know what the status of this fix is?  It's required for 
> > x86/numa to build and I'd hate to see all of this fixes miss .38 because 
> > of this failure.
> 
> If x86/numa would not be pushed to Linus. x86/apic-cleanups should be pushed at first.
> or Thomas will take care of it?
> 

x86/apic-cleanups was merged in x86/numa, so it can be pushed regardless 
of whether x86/numa will make it upstream in this cycle or not (Peter said 
it was on target for .38, but this patch has been dormant for a couple 
weeks).
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