linux-kernel - Re: [PATCH 1/1] Add force of use MMCONFIG [try #1]

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Message-ID: <p73k6605rvn.fsf@verdi.suse.de>
Date:	26 Jul 2006 17:05:00 +0200
From:	Andi Kleen <ak@...e.de>
To:	Linus Torvalds <torvalds@...l.org>
Cc:	Edgar Hucek <hostmaster@...soft.at>, ebiederm@...ssion.com,
	hpa@...or.com, linux-kernel@...r.kernel.org, gregkh@...e.de,
	akpm@...l.org
Subject: Re: [PATCH 1/1] Add force of use MMCONFIG [try #1]

Linus Torvalds <torvalds@...l.org> writes:

> On Mon, 24 Jul 2006, Andrew Morton wrote:
> > 
> > Why do we want to do this?  Are the ACPI-provided tables incorrect?  If so,
> > what problems are caused by this?
> 
> The ACPI-provided tables are apparently correct, but we sanity-check them 
> by _also_ requiring that the mmconfig base address is marked "reserved" in 
> the e820 tables.
> 
> The EFI memory maps apparently don't do that "reserved" marking.

We were planning to remove that heuristic anyways because it produced
far too many false positivies. In fact I think Greg has already 
done it. Then that patch should be obsolete.

-Andi
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