linux-kernel - Re: Question about iommu on x86

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Date:	Tue, 24 May 2011 22:33:08 +0100
From:	Daniel Haid <d.haid@...i.tv>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc:	<linux-kernel@...r.kernel.org>
Subject: Re: Question about iommu on x86_64 and radeon driver.

> Not bug per say. I've been working on making the TTM use the DMA API
> so that those pages are allocated at startup and you don't end up
> with having to sync the pages .. but I broke PowerPC and ARM during 
> 2.6.39
> so I need to redo it.

 If this is not a bug, shouldn't there be a message like
 "radeon currently does not work with SWIOTLB, disabling..."
 instead of
 "ring test failed, disabling..."?
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