Date: Tue, 27 May 2003 16:37:05 +0200
From: Willy Tarreau <willy@w.ods.org>
To: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Willy Tarreau <willy@w.ods.org>, Jason Papadopoulos <jasonp@boo.net>,
       linux-kernel@vger.kernel.org, marcelo@conectiva.com.br
Subject: Re: Linux 2.4.21-rc3 : IDE pb on Alpha
Message-ID: <20030527143705.GA27846@alpha.home.local>
References: <5.2.1.1.2.20030526232835.00a468e0@boo.net> <20030527045302.GA545@alpha.home.local> <20030527134017.B3408@jurassic.park.msu.ru> <20030527123152.GA24849@alpha.home.local> <20030527180403.A2292@jurassic.park.msu.ru>
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On Tue, May 27, 2003 at 06:04:03PM +0400, Ivan Kokshaysky wrote:
> On Tue, May 27, 2003 at 02:31:52PM +0200, Willy Tarreau wrote:
> > Sorry, I pasted the .config that I used just after, and which allowed me to
> > boot. Later I set CONFIG_BLK_DEV_ALI15X3 again and CONFIG_BLK_DEV_IDEDMA_PCI,
> > but I left CONFIG_IDEDMA_PCI_AUTO disabled. I now can boot and enable DMA
> > later. That's weird, but it works.
> 
> Perhaps not that weird. From my experience, ALi DMA is sensitive to
> some of "PIO timings". That is, if SRM hasn't initialized the chipset
> properly (on Nautilus it has, BTW), DMA won't work. When you boot with
> DMA disabled, driver has to set right PIO mode, so you can safely
> enable DMA later.
> 
> Can you (and Jason) try this patch with CONFIG_IDEDMA_PCI_AUTO=y?

Compilation in progress, but it will wait for me to get in touch with the
machine to reboot it (probably this evening).

Cheers,
Willy

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