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From: Stephan von Krawczynski <skraw@ithnet.com>
To: maney@pobox.com
Cc: marcelo@conectiva.com.br, linux-kernel@vger.kernel.org,
	Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: 2.4.22-rc2 ext2 filesystem corruption
Date: Wed, 13 Aug 2003 13:37:20 +0200	[thread overview]
Message-ID: <20030813133720.69f756d5.skraw@ithnet.com> (raw)
In-Reply-To: <1060774108.8008.16.camel@localhost.localdomain>

On 13 Aug 2003 12:28:31 +0100
Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:

> On Maw, 2003-08-12 at 22:36, Martin Maney wrote:
> > but that made no difference.  I popped a CMD648-based card in, disabled
> > the on-board Promise chip, and it booted right up and works fine with
> > 22-rc2.  So if the .id -> .present is the only change that affected the
> > Promise driver (I did some looking for obvious, but gave up after
> > realizing that unless the change actually had a /* borks Promise IDE
> > controllers*/ in it I wouldn't be likely to recognize it), then I guess
> > that's it.
> 
> That change simple turns
> 
> 		speed = random()?33:66 (but never > drive allows)
> 
> to
> 		speed = correct value
> 
> in the pdc202xx_old driver. There are many things it can trigger but I
> cannot conceive how it can be wrong itself. And not fixing it leaves it 
> definitely wrong

Maybe try another controller of same type to verify if it's a general problem
or linked to the specific piece. Could be an awful hw timing bug only showing
up at full DMA speed...

Regards,
Stephan


  reply	other threads:[~2003-08-13 11:37 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-08-12  3:58 2.4.22-rc2 ext2 filesystem corruption Martin Maney
2003-08-12 10:18 ` Stephan von Krawczynski
2003-08-12 13:12 ` Marcelo Tosatti
2003-08-12 13:42   ` Martin Maney
2003-08-12 14:10     ` Marcelo Tosatti
2003-08-12 15:14       ` Martin Maney
2003-08-12 16:58         ` Marcelo Tosatti
2003-08-12 17:11           ` Alan Cox
2003-08-12 16:56       ` Martin Maney
2003-08-12 17:09         ` Marcelo Tosatti
2003-08-12 21:36           ` Martin Maney
2003-08-13 11:28             ` Alan Cox
2003-08-13 11:37               ` Stephan von Krawczynski [this message]
2003-08-13 14:55             ` Marcelo Tosatti
2003-08-13 18:13               ` Martin Maney
2003-08-13 19:40                 ` Alan Cox
2003-08-16  6:35                   ` Martin Maney
2003-08-17  0:09                     ` Mike Fedyk
2003-08-13 22:58                 ` Nerijus Baliunas
2003-08-12  6:20 Alex Davis

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