From: Chris Wedgwood <cw@f00f.org>
To: David Sanchez <david.sanchez@lexbox.fr>
Cc: Jeff Garzik <jgarzik@pobox.com>, linux-kernel@vger.kernel.org
Subject: Re: How to Force PIO mode on sata promise (Linux 2.6.10)
Date: Thu, 22 Sep 2005 09:09:02 -0700 [thread overview]
Message-ID: <20050922160902.GA14098@taniwha.stupidest.org> (raw)
In-Reply-To: <17AB476A04B7C842887E0EB1F268111E026FBD@xpserver.intra.lexbox.org>
On Thu, Sep 22, 2005 at 10:03:10AM +0200, David Sanchez wrote:
> I add my card into the dma_black_list of the libata to force DMA
> disabled and the problem seems to no more appear...maybe PIO is so
> slow that the data has no time to be corrupted... But I can NOT
> affirm that the problem is the DMA.
> I try the linux kernel 2.4,2.6.11, 2.6.12 and 2.6.13. More I try 2
> different toolchains and the problem persists...
I doubt any of those will help. It sounds like a driver bug wrt to
non-coherent PCI. Presumably this will also hit sparc people if they
use this hardware and some PPC too.
Does the driver use the *dma_sync* API(s)? You might want to read
over Documentation/DMA-API.txt and see if the driver is doing the
right things.
next prev parent reply other threads:[~2005-09-22 16:46 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-22 8:03 David Sanchez
2005-09-22 16:09 ` Chris Wedgwood [this message]
2005-09-22 16:36 ` Bill Davidsen
-- strict thread matches above, loose matches on Subject: below --
2005-09-23 8:34 David Sanchez
2005-09-23 9:47 ` Clemens Koller
2005-09-21 14:48 David Sanchez
2005-09-22 9:04 ` Clemens Koller
2005-09-21 12:28 David Sanchez
2005-09-21 14:02 ` Clemens Koller
2005-09-22 3:01 ` Chris Wedgwood
2005-09-21 7:34 David Sanchez
2005-09-21 11:46 ` Jeff Garzik
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