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Subject: [BUG] perf and kmemcheck : fatal combination
From: Eric Dumazet <eric.dumazet@gmail.com>
To: Ingo Molnar <mingo@elte.hu>, Arnaldo Carvalho de Melo <acme@infradead.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Paul Mackerras <paulus@samba.org>, Pekka Enberg <penberg@kernel.org>,
        Vegard Nossum <vegardno@ifi.uio.no>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
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Date: Mon, 25 Apr 2011 18:08:51 +0200
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Hi guys

Just got a panic on a kmemcheck kernel, latest linux-2.6 tree.

I forgot I had kmemcheck enabled, and started "perf top" just because my
machine was damn slow... Oh well...

Crash in do_nmi -> nmi_enter() -> BUG_ON(in_nmi());

Thanks