From: Tejun Heo <htejun@gmail.com>
To: "Jean-François Stenuit" <jfs@keytradebank.com>
Cc: Keith Mannthey <kmannth@gmail.com>, "0602@eq.cz" <0602@eq.cz>,
Linux-ide <linux-ide@vger.kernel.org>,
Jeff Garzik <jgarzik@pobox.com>
Subject: Re: totally random "VFS: Cannot open root device"
Date: Thu, 01 Dec 2005 22:29:09 +0900 [thread overview]
Message-ID: <438EFAA5.3070901@gmail.com> (raw)
In-Reply-To: <438EF3B6.7020007@keytradebank.com>
Jean-François Stenuit wrote:
> Hi Tejun,
>
> Thanks for taking the time to check.
>
> Output of your trace with ata_piix.override_PCS=0
> 1st boot : success : combined=0 orig_mask=0x11
> 2nd boot : success : combined=0 orig_mask=0x11
> 3rd boot : failure : combined=0 orig_mask=0x0
> 4th boot : failure : combined=0 orig_mask=0x0
> 5th boot : failure : combined=0 orig_mask=0x0
> 6th boot : failure : combined=0 orig_mask=0x0
> 7th boot : success : combined=0 orig_mask=0x11
> Output of your trace with ata_piix.override_PCS=1
> 1st boot : success : combined=0 orig_mask=0x0
> 2nd boot : success : combined=0 orig_mask=0x0
> 3rd boot : success : combined=0 orig_mask=0x0
> 4th boot : success : combined=0 orig_mask=0x0
> 5th boot : success : combined=0 orig_mask=0x0
> 6th boot : success : combined=0 orig_mask=0x0
> 7th boot : success : combined=0 orig_mask=0x0
> 8th boot : success : combined=0 orig_mask=0x0
>
> Looks like you have found a fix/workaround for this bug (but it still
> does not give the reason why it's failing).
>
It probably is a BIOS issue. The weird thing though is that the port
works fine with its corresponding ENABLED bit cleared. Anyways, if it
works by ignoring the ENABLED bit, ignoring should just be fine.
0602, can you verify this workaround works on your machine too?
Jeff (Hi!), if 0602 also confirms that this workaround works, I'll
submit a patch to make ata_piix ignore PCS values on ICH5's. How does
that sound to you?
--
tejun
next prev parent reply other threads:[~2005-12-01 13:29 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <438B6E05.8070009@eq.cz>
2005-11-30 4:35 ` totally random "VFS: Cannot open root device" Tejun Heo
2005-11-30 9:05 ` Jean-François Stenuit
2005-11-30 16:30 ` Randy.Dunlap
2005-12-01 9:42 ` Jean-François Stenuit
2005-12-01 11:20 ` Jean-François Stenuit
2005-11-30 13:07 ` 0602
2005-11-30 22:05 ` Keith Mannthey
2005-12-01 9:40 ` Jean-François Stenuit
2005-12-01 11:20 ` Tejun Heo
2005-12-01 12:59 ` Jean-François Stenuit
2005-12-01 13:29 ` Tejun Heo [this message]
2005-12-01 15:34 ` 0602
2005-12-02 1:53 ` Jeff Garzik
2005-12-02 3:00 ` Tejun Heo
2005-12-02 3:26 ` [PATCH] ata_piix: ignore all zero PCS value on ICH5's Tejun Heo
2005-12-02 12:40 ` 0602
2005-12-05 10:07 ` Jean-François Stenuit
2005-12-05 10:17 ` Tejun Heo
2006-01-29 5:22 ` Jeff Garzik
2006-02-01 2:01 ` Tejun Heo
2006-02-09 9:23 ` Jeff Garzik
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