linux-kernel - Re: data corruption with nvidia chipsets and IDE/SATA drives // memory hole mapping related bug?!

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Message-ID: <458CA1DE.70804@scientia.net>
Date:	Sat, 23 Dec 2006 04:26:22 +0100
From:	Christoph Anton Mitterer <calestyo@...entia.net>
To:	John A Chaves <chaves@...puter.org>
CC:	Karsten Weiss <K.Weiss@...ence-computing.de>,
	Chris Wedgwood <cw@...f.org>, linux-kernel@...r.kernel.org,
	Erik Andersen <andersen@...epoet.org>, Andi Kleen <ak@...e.de>,
	muli@...ibm.com
Subject: Re: data corruption with nvidia chipsets and IDE/SATA drives // memory
 hole mapping related bug?!

John A Chaves wrote:
> I didn't need to run a specific test for this.  The normal workload of the
> machine approximates a continuous selftest for almost the last year.
>
> Large files (4-12GB is typical) are being continuously packed and unpacked
> with gzip and bzip2.  Statistical analysis of the datasets is followed by
> verification of the data, sometimes using diff, or md5sum, or python
> scripts using numarray to mmap 2GB chunks at a time.  The machine
> often goes for days with a load level of 20+ and 32GB RAM + another 32GB
> swap in use.  It would be very unlikely for data corruption to go unnoticed.
>
> When I first got the machine I did have some problems with disks being
> dropped from the RAID and occasional log messages implicating the IOMMU.
> But that was with kernel 2.6.16.?, Kernels since 2.6.17 haven't had any
> problem.
>   
Ah thanks for that info,.. as far as I can tell,.. this "testing
environment" should have found any corruptions I there had been any.

So I think we could take this as our first working system where the
issue don't occur although we would expect it...

Chris.

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