linux-kernel - Re: [PATCH] x86_64: remove never used nodenumer in pda

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Date:	Tue, 19 Feb 2008 13:37:55 -0800
From:	Mike Travis <travis@....com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Yinghai Lu <Yinghai.Lu@....COM>, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	lameter@....com
Subject: Re: [PATCH] x86_64: remove never used nodenumer in pda

Andi Kleen wrote:

>> (And of course the problem with cpus on nodes with no local memory
>> needs to be resolved as well.)
> 
> All CPUs get assigned to some node at boot.
> 
> And there should be always per cpu variables or pda to use.

Sorry, I was being vague.  Mel Gorman found a problem that appears
linked to the change to 16-bit apicids on an AMD box that has 4
nodes, but nodes 1-3 have no memory, and the system panics during
cpu_up() on the 2nd cpu which is on node 1.

I've not yet been able to replicate the problem.

Thanks,
Mike
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