From: Jeff Garzik <jgarzik@pobox.com>
To: Keith Owens <kaos@ocs.com.au>
Cc: linux-kernel@vger.kernel.org
Subject: Re: 2.6.18-rc2 Intermittent failures to detect sata disks
Date: Tue, 25 Jul 2006 01:57:08 -0400 [thread overview]
Message-ID: <44C5B2B4.4090300@pobox.com> (raw)
In-Reply-To: <9235.1153806649@kao2.melbourne.sgi.com>
Keith Owens wrote:
> Keith Owens (on Fri, 21 Jul 2006 16:18:47 +1000) wrote:
>> I am seeing an intermittent failures to detect sata disks on
>> 2.6.18-rc2. Dell SC1425, PIIX chipset, gcc 4.1.0 (opensuse 10.1).
>> Sometimes it will detect both disks, sometimes only one, sometimes none
>> at all. AFAICT it only occurs after a soft reboot, and possibly only
>> after an emergency reboot. Alas the problem is so intermittent that it
>> is hard to tell what conditions will trigger it.
>
> I applied the debug patch below, turn on prink timing and set
> initdefault to 6 so the machine was in a continual soft reboot cycle.
> After multiple cycles I got this trace. piix_sata_prereset() reads a
> zero config byte for almost 15 seconds then it changes to 0x11,
> followed by a hang. Why is the config byte initially zero, and what
> makes it change? The normal value for pcs is 0x33.
Can you try 2.6.18-rc2-git3?
Jeff
next prev parent reply other threads:[~2006-07-25 5:57 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-21 6:18 2.6.18-rc2 Intermittent failures to detect sata disks Keith Owens
2006-07-25 5:50 ` Keith Owens
2006-07-25 5:57 ` Jeff Garzik [this message]
2006-07-25 6:27 ` Keith Owens
2006-07-25 6:49 ` Keith Owens
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