linux-kernel - Re: libata timeout, MCE and kernel panic

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Message-ID: <20080724002324.GK3930@cubit>
Date:	Thu, 24 Jul 2008 09:53:24 +0930
From:	Kevin Shanahan <kmshanah@...enchant.net>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: libata timeout, MCE and kernel panic

On Thu, Jul 24, 2008 at 12:49:28AM +0100, Alan Cox wrote:
> > recovery was required. It seems the journal recovery combined with the
> > md device reconstruction was enough to cause an ata command
> > timeout. After that I saw several MCEs and the kernel paniced.
> 
> An MCE is amachine check, and indicates the hardware detected a problem.
> Given the sequence of heavy I/O, followed by a timeout and the processors
> detecting inconsistencies - is your PSU sufficient ?

Hmm, you may be on to something there. This machine was designed with
two disksoriginally, but due to a hardware failure on another machine
it's actually running with 5 (off a 450W redundant PSU). I have bigger
replacement PSUs on the way, so here's hoping that resolves it. Thanks
for the reply.

Regards,
Kevin.
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