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Date: Fri, 06 Jun 2003 00:08:48 -0700 (PDT)
Message-Id: <20030606.000848.38709837.davem@redhat.com>
To: davidm@hpl.hp.com, davidm@napali.hpl.hp.com
Cc: manfred@colorfullife.com, axboe@suse.de, linux-kernel@vger.kernel.org
Subject: Re: problem with blk_queue_bounce_limit()
From: "David S. Miller" <davem@redhat.com>
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   From: David Mosberger <davidm@napali.hpl.hp.com>
   Date: Thu, 5 Jun 2003 23:54:50 -0700

   >>>>> On Thu, 05 Jun 2003 23:45:26 -0700 (PDT), "David S. Miller" <davem@redhat.com> said:

     > David, what is blk_max_low_pfn set to on your ia64 systems?
   
   max_low_pfn, which is going to be the pfn of some page > 4GB (for
   machines with a sufficient amount of memory).

Right, but see my other email, you need to see PCI_DMA_BUS_IS_PHYS
properly.  This tells the block layer if you're IOMMU or not.