Date: Wed, 05 Nov 1997 17:28:11 -0800 From: David Greenman <dg@root.com> To: "John W. DeBoskey" <jwd@unx.sas.com> Cc: freebsd-current@FreeBSD.ORG Subject: Re: fxp0 causes machine lockup Message-ID: <199711060128.RAA04958@implode.root.com> In-Reply-To: Your message of "Wed, 05 Nov 1997 17:09:45 EST." <199711052209.AA29928@iluvatar.unx.sas.com>
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> In looking through the archives I found this message which appears >to be similar, though with different hardware: > >>From: "Mike Durian" <durian@plutotech.com> >>Date: Wed, 01 Oct 1997 12:45:27 -0600 >>Subject: strange interaction with Pentium and fxp ... That turned out to be caused by some local kernel changes that they had made - they had a SCSI card's EEPROM responding to physical addresses that were in the area of system RAM. This caused the DMA to hang; it wasn't bug in FreeBSD or the hardware and it went away when they fixed their code. I don't have any idea why your machine is hanging. Very odd and your's is the only report I've gotten of a problem like that. The first thing to do would be to figure out if it is a DMA or interrupt problem by adding printf's all over the place inside the driver, and then see where it dies. -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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