linux-kernel - Re: Intel's response Linux/MTRR/8GB Memory Support / Why doesn't the kernel realize the BIOS has problems and re-map appropriately?

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Message-ID: <20070605094623.GA23274@one.firstfloor.org>
Date:	Tue, 5 Jun 2007 11:46:23 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Yinghai Lu <yhlu.kernel@...il.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Justin Piszcz <jpiszcz@...idpixels.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org
Subject: Re: Intel's response Linux/MTRR/8GB Memory Support / Why doesn't the kernel realize the BIOS has problems and re-map appropriately?

> So the only safe thing we can do is not use memory that is not
> write-back cached.  That we can positively detect and is a
> conservative action so if anything will work that will.

Jesse wrote such a patch (or rather it limitted end_pfn), but it broke
the X server for so far unknown reasons.

-Andi
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