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From: Hans Petter Selasky <hselasky@c2i.net>
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Date: Fri, 7 Nov 2008 17:07:44 +0100
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Cc: Jeremy Chadwick <koitsu@freebsd.org>
Subject: Re: Kernel panic when copying data to umass device (USB4BSD)
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On Friday 07 November 2008, Jeremy Chadwick wrote:
> http://www.malkavian.com/~jdc/usb2_da0_crash.jpg

Hi Jeremy,

This issue has already been reported. It has to do with busdma. I will try to 
verify the busdma path when bounching is enabled. I think I can simulate this 
on my system by lowering the physical DMA limit. I have not tested on systems 
with more than 4GB of ram.

--HPS