linux-kernel - Re: [BUG 2.6.27-rc1] find_busiest

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Message-ID: <1289644224.2084.521.camel@laptop>
Date:	Sat, 13 Nov 2010 11:30:24 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Wu Fengguang <fengguang.wu@...el.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Nikanth Karthikesan <knikanth@...e.de>,
	Yinghai Lu <yinghai@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	"Zheng, Shaohui" <shaohui.zheng@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-hotplug@...r.kernel.org
Subject: Re: [BUG 2.6.27-rc1] find_busiest_group() LOCKUP

On Sat, 2010-11-13 at 16:40 +0800, Wu Fengguang wrote:
> > Will try and figure out how the heck that's happening, Ingo any clue?
> 
> It's back to normal on 2.6.37-rc1 when reverting commit 50f2d7f682f9
> ("x86, numa: Assign CPUs to nodes in round-robin manner on fake NUMA").
> 
> The interesting part is, the commit was introduced in 
> 2.6.36-rc7..2.6.36, however 2.6.36 boots OK, while 2.6.37-rc1 panics.

Argh, that commit again..

Does this fix it: http://lkml.org/lkml/2010/11/12/8


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