linux-kernel - Re: data corruption with nvidia chipsets and IDE/SATA drives // memory hole mapping related bug?!

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Message-ID: <20061213202925.GA3909@codepoet.org>
Date:	Wed, 13 Dec 2006 13:29:25 -0700
From:	Erik Andersen <andersen@...epoet.org>
To:	Karsten Weiss <K.Weiss@...ence-computing.de>
Cc:	Christoph Anton Mitterer <calestyo@...entia.net>,
	linux-kernel@...r.kernel.org, Chris Wedgwood <cw@...f.org>
Subject: Re: data corruption with nvidia chipsets and IDE/SATA drives // memory hole mapping related bug?!

On Mon Dec 11, 2006 at 10:24:02AM +0100, Karsten Weiss wrote:
> We could not reproduce the data corruption anymore if we boot
> the machines with the kernel parameter "iommu=soft" i.e. if we
> use software bounce buffering instead of the hw-iommu.

I just realized that booting with "iommu=soft" makes my pcHDTV
HD5500 DVB cards not work.  Time to go back to disabling the
memhole and losing 1 GB.  :-(

 -Erik

--
Erik B. Andersen             http://codepoet-consulting.com/
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