From owner-freebsd-hackers Wed Dec 17 07:40:51 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id HAA19102 for hackers-outgoing; Wed, 17 Dec 1997 07:40:51 -0800 (PST) (envelope-from owner-freebsd-hackers) Received: from elvis.vnet.net (elvis.vnet.net [166.82.1.5]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id HAA19091 for ; Wed, 17 Dec 1997 07:40:42 -0800 (PST) (envelope-from rivers@dignus.com) Received: from ponds.dignus.com (ponds.vnet.net [166.82.177.48]) by elvis.vnet.net (8.8.8/8.8.4) with ESMTP id KAA25287; Wed, 17 Dec 1997 10:40:11 -0500 (EST) Received: from lakes.dignus.com (lakes [10.0.0.3]) by ponds.dignus.com (8.8.5/8.8.5) with ESMTP id LAA20906; Wed, 17 Dec 1997 11:03:04 -0500 (EST) Received: (from rivers@localhost) by lakes.dignus.com (8.8.7/8.6.9) id KAA17178; Wed, 17 Dec 1997 10:45:50 -0500 (EST) Date: Wed, 17 Dec 1997 10:45:50 -0500 (EST) From: Thomas David Rivers Message-Id: <199712171545.KAA17178@lakes.dignus.com> To: mike@smith.net.au, sclawson@bottles.cs.utah.edu Subject: Re: panic: blkfree: freeling free block/frag Cc: freebsd-hackers@FreeBSD.ORG, ivt@gamma.ru, tlambert@primenet.com Sender: owner-freebsd-hackers@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk > > Mike Smith uttered: > > Single-bit memory error, perhaps? Still, keep an eye on it... > > Probably. The only real culprit for parity problems right now is > the L2 cache of the processor, since we've got the version of the > Pentium II that dosen't do ECC on it's L2 cache, and the memory in the > machine is 36bit (yes, parity checking was/is enabled). Unfortunately > when we were buying the machine we didn't know there were two > different versions of the chip. While I wouldn't discount such a possibility - I'd point out that I've been able to reproduce this problem on three machines. It seems unlikely that all three had the same parity errors (each has parity ram, and would thus, presumably, get NMIs for any RAM problems.) - Dave Rivers -