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Date: Wed, 5 Mar 2003 18:57:13 -0800
From: David Rees <dbr@greenhydrant.com>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Linux vs Windows temperature anomaly
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In-Reply-To: <p05210507ba8c20241329@[10.2.0.101]>; from linux@lundell-bros.com on Wed, Mar 05, 2003 at 01:52:16PM -0800
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On Wed, Mar 05, 2003 at 01:52:16PM -0800, Jonathan Lundell wrote:
> We've been seeing a curious phenomenon on some PIII/ServerWorks 
> CNB30-LE systems.
> 
> The systems fail at relatively low temperatures. While the failures 
> are not specifically memory related (ECC errors are never a factor), 
> we have a memory test that's pretty good at triggering them. Data is 
> apparently getting corrupted on the front-side bus.
> 
> Here's the curious thing: when we run the same memory test on a 
> Windows 2000 system (same hardware; we just swap the disk), we can 
> run the ambient temperature up to 60C with no problem at all; the 
> test will run for days. (It occurred to us to try Win2K because the 
> hardware vendor was using it to test systems at temperature without 
> seeing problems.)
> 
> Swap in the Linux disk, and at that temperature it'll barely run at 
> all. The memory test fails quickly at 40C ambient.
> 
> FWIW, CPU cooling is pretty good in this box.
> 
> So, the puzzle: what might account for temperature sensitivity, of 
> all things, under Linux 2.4.9-31 (RH 7.2), but not Win2K?

Since it doesn't sound like this is a memory error, but a chipset driver
error it could be a Linux driver bug.

You are running a very old kernel, at the least upgrade to the latest
errata (which is currently 2.4.18-26.7.  You are running the latest
security updates as well, right?

-Dave
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