From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andi Kleen <ak@suse.de>
Subject: Re: 2.6.24-rc & SB600 AHCI no go on >=4GB of RAM II
Date: Tue, 20 Nov 2007 17:36:02 +0100
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To: Thomas Gleixner <tglx@linutronix.de>
Cc: Tejun Heo <htejun@gmail.com>, Srihari Vijayaraghavan <sriharivijayaraghavan@yahoo.com.au>, Ingo Molnar <mingo@elte.hu>, linux-ide@vger.kernel.org, Jens Axboe <jens.axboe@oracle.com>


> Which in turn enables the iommu_merge functionality in gart_map_sg().

> 	for_each_sg(sg, s, nents, i) {

Hmm, another thought. Maybe this code just has trouble with the new 
linked SG lists and it's not really a SB600 problem?

I did a quick test on two ATI machines with older chipset and iommu=force,merge
and it didn't show a problem though.

-Andi