linux-kernel - Re: Attansic L1 page corruption

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Date:	Mon, 25 Jun 2007 07:42:44 -0500
From:	Jay Cliburn <jacliburn@...lsouth.net>
To:	"Jay L. T. Cornwall" <jay@...na.co.uk>
CC:	linux-kernel@...r.kernel.org, kronos.it@...il.com,
	Chris Snook <csnook@...hat.com>
Subject: Re: Attansic L1 page corruption

Jay L. T. Cornwall wrote:
> Jay Cliburn wrote:
> 
>> For reasons not yet clear to me, it appears the L1 driver has a bug or
>> the device itself has trouble with DMA in high memory.  This patch,
>> drafted by Luca Tettamanti, is being explored as a workaround.  I'd be
>> interested to know if it fixes your problem.
> 
> Yes, it certainly seems to. Now running with this patch and 4GB active,
> I've transferred about 15GB with no problem so far. It usually oopses
> after a GB or two.
> 
> I guess it's not an ideal solution, architecturally speaking, but it's a
> good deal better than an unstable driver. If there's any other patches
> you'd like me to test or traces to capture, I'm happy to help out.
> Otherwise I'll run with this one for now since it does the job!

Okay Jay, thanks.

Luca, would you please submit your patch to Jeff Garzik and netdev?

Jay

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