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Re: Linux w/XFS on Athlon systems

To: Seth Mos <knuffie@xxxxxxxxx>, linux-xfs@xxxxxxxxxxx
Subject: Re: Linux w/XFS on Athlon systems
From: Jean Francois Martinez <jfm2@xxxxxxxxxxxxxxxx>
Date: Fri, 07 Dec 2001 01:41:28 +0100
References: <Pine.BSI.4.10.10112062034020.8606-100000@xxxxxxxxxxxxx> <4.3.2.7.2.20011206234949.023196a8@xxxxxxxxxxxxx>
Sender: owner-linux-xfs@xxxxxxxxxxx
Seth Mos wrote:
> 
> At 13:29 6-12-2001 -0800, Gabe E. Nydick wrote:
> >Seth,
> >
> >     The system we have works fine with 1000 simultaneous bonnie++ processes
> >running under a PIII kernel.  Do you think it could still be the memory?
> 
> I had one system with 64 MB of ram of which about 1 was faulty. Sometimes
> it booted. It died at various places. corrupted some files crashed some
> processes, some stuck in D state, hanging kupdate, oopses, panics. I had
> seen about every error known to man in about 2 hours untill I removed one
> of the dims and everything was well.
> 
> That was 4 months ago. The machine is still running to this date and has
> never crashed _once_ since that time or even give any form of trouble.
> 
> Bonnie excercises disk. The Bonnie proces stays in RAM and your disk cache
> might wander right over the bad piece of ram without crashing the kernel.
> You enable the Athlon option, it reorganizes some ways of reading and
> writing to the ram to speed it up and suddenly the kernel code is trying to
> use the faulty ram. Seems plausible to me.
> 
> Did you enable mtrr by any chance? I could make a Eicon Diva server card
> stop working by enabling or disabling mtrr. Because of remapping some
> buffers and PCI ports the driver was not the same spot where the driver
> thought it should have been.
> 

Xfree 4.x enable mtrr by default if kernel has been compiled with mtrr
support.


-- 
Jean Francois Martinez

Project Independence http://independence.seul.org
Because Linux should be for everyone


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