linux-kernel - Re: [PATCH 2/4] nmi: add generic nmi tracking state

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Message-Id: <1233912891.4731.1.camel@laptop>
Date:	Fri, 06 Feb 2009 10:34:51 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Steven Rostedt <srostedt@...hat.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Subject: Re: [PATCH 2/4] nmi: add generic nmi tracking state

On Fri, 2009-02-06 at 01:53 -0500, Steven Rostedt wrote:

> This code adds an in_nmi() macro that uses the current tasks preempt count
> to track when it is in NMI context. Other parts of the kernel can
> use this to determine if the context is in NMI context or not.
> 
> This code was inspired by the -rt patch in_nmi version that was
> written by Peter Zijlstra.

Which in turn I borrowed from Mathieu.


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