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Date: Wed, 30 Apr 2008 00:09:53 +0200
From: Ingo Molnar <mingo@elte.hu>
To: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
       Andrew Morton <akpm@linux-foundation.org>,
       "H. Peter Anvin" <hpa@zytor.com>, Thomas Gleixner <tglx@linutronix.de>,
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       "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
       Mika Fischer <mika.fischer@zoopnet.de>
Subject: Re: [PATCH] x86: mtrr cleanup for converting continuous to
	discrete layout v5
Message-ID: <20080429220953.GI2302@elte.hu>
References: <200804272337.40130.yhlu.kernel@gmail.com> <200804281244.56938.yhlu.kernel@gmail.com> <200804281316.14168.yhlu.kernel@gmail.com> <200804281505.05764.yhlu.kernel@gmail.com> <m1wsmg32qk.fsf@frodo.ebiederm.org> <86802c440804291304r7ff169f6k9132f98761ecef42@mail.gmail.com> <m1abjcz9ow.fsf@frodo.ebiederm.org> <86802c440804291457k79099d84w53110fabf59e9e37@mail.gmail.com>
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* Yinghai Lu <yhlu.kernel@gmail.com> wrote:

> agreed. so that feature is compiled in but disable by default.
> 
> BTW: is any chance for OS to disable SMI etc? to verify is the 
> unstatbility is caused by SMI?

i dont think there's any documented way for that. SMI might be the 
mechanism that ensures blue-smoke type of system reliability (CPU fan, 
temperature, etc.) so it would be extremely dangerous to mess with it.

	Ingo