From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joerg Roedel <joro@8bytes.org>
Subject: Re: [PATCH 0/16] DMA-API debugging facility v2
Date: Thu, 12 Feb 2009 15:48:13 +0100
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On Thu, Feb 05, 2009 at 06:05:35PM -0800, Chris Wright wrote:

> (interesting hash_fn spread ;-)

Hmm, thats because all device addresses are 16kb aligned. The hashfn
uses bits 13 to 21 as the index for the hash. I can move this window up
to bits 18-26 if it improves the hash spread.

Joerg