RE: How to Force PIO mode on sata promise (Linux 2.6.10)

["David Sanchez" <david.sanchez@lexbox.fr>]

Hi Chris,
It was a good idea but it doesn't resolve the problem...

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...

Another idea??

Thanks,

David

-----Message d'origine-----
De : linux-kernel-owner@vger.kernel.org [mailto:linux-kernel-owner@vger.kernel.org] De la part de Chris Wedgwood
Envoyé : jeudi 22 septembre 2005 05:00
À : David Sanchez
Cc : Jeff Garzik; linux-kernel@vger.kernel.org
Objet : Re: How to Force PIO mode on sata promise (Linux 2.6.10)

On Wed, Sep 21, 2005 at 02:28:02PM +0200, David Sanchez wrote:

> I'm using the linux kernel 2.6.10 and busybox on an AMD db AU1550
> with a hdd connected to the pata port of a PCI card (Promise
> PDC20579).

Disable prefetch in lib/memcpy.S and see if that helps.
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