linux-kernel - Re: [PATCH] x86-64: disable the GART before allocate aperture

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Message-id: <467C53C4.4060004@sun.com>
Date:	Fri, 22 Jun 2007 15:57:08 -0700
From:	Yinghai Lu <Yinghai.Lu@....COM>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Muli Ben-Yehuda <muli@...ibm.com>, Andi Kleen <ak@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Vivek Goyal <vgoyal@...ibm.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86-64: disable the GART before allocate aperture

Alan Cox wrote:

> Don't disable it, just don't touch it or any of its mappings. Leave it
> *alone*, and use swiotlb. That'll maximise the ability to recover stuff
> from the kexec kernel (since for one you may want to dump the gart when a
> 3d app goes kerblam)

How about LinuxBIOS + Kernel ===> Final kernel path?
someday EFI(PEI) + Kernel ===> Final kernel path need that too.

or the normal kexec path still could have clean shutdown.

YH
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