linux-kernel - Re: NMI between switch_mm and switch

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Message-ID: <87vdldgnzd.fsf@basil.nowhere.org>
Date:	Tue, 28 Jul 2009 11:23:34 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
	linux-kernel@...r.kernel.org
Subject: Re: NMI between switch_mm and switch_to

Peter Zijlstra <a.p.zijlstra@...llo.nl> writes:

> We could use preempt notifiers (or put in our own hooks) to disable
> callchains during the context switch I suppose.

You can simply check if cr3 matches the current->mm page tables
and not dump if they are not.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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