linux-kernel - Re: kmemcheck: OS boot failed because NMI handlers access the memory tracked by kmemcheck

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Message-ID: <20140317101527.GB27965@twins.programming.kicks-ass.net>
Date:	Mon, 17 Mar 2014 11:15:27 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Xishi Qiu <qiuxishi@...wei.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	vegard.nossum@...cle.com, Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Vegard Nossum <vegard.nossum@...il.com>,
	Linux MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Li Zefan <lizefan@...wei.com>
Subject: Re: kmemcheck: OS boot failed because NMI handlers access the memory
 tracked by kmemcheck

On Mon, Mar 17, 2014 at 05:19:33PM +0800, Xishi Qiu wrote:
> Now we don't support page faults in NMI context is that we
> may already be handling an existing fault (or trap) when the NMI hits.
> So that would mess up kmemcheck's working state.

I think it was suggested earlier that kmemcheck could maybe have a stack
of states.
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