From owner-freebsd-hackers  Fri Oct  8  9:22: 1 1999
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Date: Fri, 08 Oct 1999 09:22:52 -0700
From: Stevan Arychuk <sa-list@avantgo.com>
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Organization: AvantGo Inc.
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To: dg@root.com
Cc: FreeBSD-hackers@FreeBSD.ORG, FreeBSD-stable@FreeBSD.ORG
Subject: Re: SMP + fxp0 wierdness
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Thanks for your response David.

Do you think the problem is isolated to just the onboard devices?  Would
a PCI NIC help or is it the entire N440BX board?

Regards,

Stevan Arychuk
AvantGo Inc.
stevan@avantgo.com

David Greenman wrote:
> 
> >We're running 3.3-REL on dual processor PII-450's, with a N440BX
> >motherboard, using the onboard EtherExpress Pro (fxp) NIC and 512MB RAM.
> >
> >These machines are running custom software that excercises the disk, CPU
> >and network quite heavily.  The SMP machines seem to have both "fxp0:
> >device timeout" problems, and spontaneous reboots.  We were uable to get
> >a working savecore until now, and have traced the reboots back to the
> >fxp driver as well.  Here are the debug outputs, and any custom changes
> >to our kernel config.
> >
> >Could this be a problem with SMP + fxp combination?  Any other thoughts
> >or ideas?
> >
> >We've serached, and read, and searched all the FAQ's for both of these
> >problems, and have pretty well come up empty.  Suggestions for the next
> >course of action?
> >
> >Thanks in advance for anyones help.
> 
>    There is some kind of hardware problem with the Intel N440BX motherboard
> that is causing memory corruption during the DMA. This is the third nearly
> identical report I've gotten about it. It does not appear to be a FreeBSD
> bug and so far only occurs when using the N440BX. You might try messing with
> the BIOS options and see if changing any of the DMA related settings will
> make the problem go away...I'd be very interested in the results.
> 
> -DG
> 
> David Greenman
> Co-founder/Principal Architect, The FreeBSD Project - http://www.freebsd.org
> Creator of high-performance Internet servers - http://www.terasolutions.com
> Pave the road of life with opportunities.
> 
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