linux-kernel - Re: [PATCH] x86, perf_p4: block PMIs on init to prevent a stream of unkown NMIs

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Message-ID: <20140120083859.GD30183@twins.programming.kicks-ass.net>
Date:	Mon, 20 Jan 2014 09:38:59 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Don Zickus <dzickus@...hat.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Dave Young <dyoung@...hat.com>,
	Vivek Goyal <vgoyal@...hat.com>,
	Cyrill Gorcunov <gorcunov@...nvz.org>
Subject: Re: [PATCH] x86, perf_p4:  block PMIs on init to prevent a stream of
 unkown NMIs

On Fri, Jan 17, 2014 at 10:41:41AM -0500, Don Zickus wrote:
> I could have removed the ENABLE bit too, but was worried it would impact
> BIOS vendors secret ability to monitor cpu states.  I figured the ability to
> generate a PMI or not is not interesting to them and chose that route instead.


You worry about the wrong things, just clear the things.
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