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From: "David S. Miller" <davem@redhat.com>
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Date: Thu, 7 Jun 2001 18:30:05 -0700 (PDT)
To: Richard Henderson <rth@redhat.com>
Cc: Linus Torvalds <torvalds@transmeta.com>, Jens Axboe <axboe@suse.de>,
        Patrick Mochel <mochel@transmeta.com>, Alan Cox <alan@redhat.com>,
        MOLNAR Ingo <mingo@chiara.elte.hu>,
        Kanoj Sarcar <kanoj@google.engr.sgi.com>,
        Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [patch] 32-bit dma memory zone
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Richard Henderson writes:
 > On most alphas we use only one zone -- ZONE_DMA.  The iommu makes it
 > possible to do 32-bit pci to the entire memory space.
 > 
 > For those alphas without an iommu, we also set up ZONE_NORMAL.

And on sparc64 since all machines have an iommu, we use just ZONE_DMA
for everything.

Later,
David S. Miller
davem@redhat.com