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Message-Id: <20070601134607.ce4a37bd.akpm@linux-foundation.org>
Date: Fri, 1 Jun 2007 13:46:07 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Geller Sandor <wildy@...ra.hos.u-szeged.hu>
Cc: linux-kernel@...r.kernel.org,
Sergei Shtylyov <sshtylyov@...mvista.com>,
linux-ide@...r.kernel.org
Subject: Re: HPT374 IDE problem with 2.6.21.* kernels
On Wed, 30 May 2007 11:30:00 +0200 (CEST)
Geller Sandor <wildy@...ra.hos.u-szeged.hu> wrote:
> Hi,
>
> I saw a similar report yesterday with '2.6.21.1 - 97% wait time on IDE
> operations' subject.
>
> After upgrading from 2.6.20.7 kernel to 2.6.21.1 my system started to
> reset infrequenly the IDE bus. In the syslog DMA timeout, resetting IDE
> bus messages appeared. I've changed the two disks attached to the HPT374
> controller, and always the first disk had problems. I've replaced cables,
> plugged the disks into other IDE ports, but it was only a matter of time
> to experience an IDE reset. When I upgraded to 2.6.21.3 the resets became
> much more frequent, this time even DMA was disabled too on the first disk.
> I turned DMA back Manually with hdparm, and a few seconds of intense IO
> activity resulted in another IDE reset.
>
> Reverting back to 2.6.20.12 the problem seems to be gone. BTW I'm using
> the PATA driver for the HTP374, not the libata one.
>
> Is this a known problem/ is there a way I can help locating the cause of
> the problem?
>
(cc's added)
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