From owner-freebsd-current@FreeBSD.ORG Wed Feb 8 00:55:45 2006 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 53AF116A420 for ; Wed, 8 Feb 2006 00:55:45 +0000 (GMT) (envelope-from dwhite@gumbysoft.com) Received: from carver.gumbysoft.com (carver.gumbysoft.com [66.220.23.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9A84743D49 for ; Wed, 8 Feb 2006 00:55:43 +0000 (GMT) (envelope-from dwhite@gumbysoft.com) Received: by carver.gumbysoft.com (Postfix, from userid 1000) id 681D472DD9; Tue, 7 Feb 2006 16:55:43 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by carver.gumbysoft.com (Postfix) with ESMTP id 6350A72DCB; Tue, 7 Feb 2006 16:55:43 -0800 (PST) Date: Tue, 7 Feb 2006 16:55:43 -0800 (PST) From: Doug White To: Steve Kargl In-Reply-To: <20060205061556.GA4551@troutmask.apl.washington.edu> Message-ID: <20060207165504.X84226@carver.gumbysoft.com> References: <20060131212209.GA870@troutmask.apl.washington.edu> <20060201010157.GA604@troutmask.apl.washington.edu> <20060201042122.GA27796@troutmask.apl.washington.edu> <20060204214535.S45494@carver.gumbysoft.com> <20060205061556.GA4551@troutmask.apl.washington.edu> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Cc: freebsd-current@freebsd.org Subject: Re: panic: Memory modified after free X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 08 Feb 2006 00:55:45 -0000 On Sat, 4 Feb 2006, Steve Kargl wrote: > On Sat, Feb 04, 2006 at 09:51:32PM -0800, Doug White wrote: > > Sorry for the late response on this, but I just debugged similar issues on > > a Tyan S2892. The problem there was that the system would panic in unusual > > places under load. The root cause was that the BIOS was not down-clocking > > the DIMM speeds under high-load situations (e.g, all DIMM slots > > populated), which caused random memory corruption. Updating to BIOS v2.00 > > fixed the problem. > > > > Make sure you are running BIOS v3.04 or later on your S2882. The BIOS > > download for that motherboard is: > > > > http://www.tyan.com/support/html/b_s2882.html > > > > The other option is to remove DIMMs from the system. > > > > Updating the bios is the first thing I did. IIRC, I'm at 3.05. > The "Memory modified after free" is a real problem somewhere > deep inside devfs. See cognet's last commit to tty_pty.c. > > However, I'll look into the DIMM timing issues because I have > been experiencing some lock-ups (not panics) when my system > is under heavy load. I've tested the memory with memtest86+ > more than once, and it appears to be good. ok, if its reproducible, then I'll butt out. I wasted a week tracking the bad memory timing issue, so tyan opteron problem nails are getting a whack with my upgrade-BIOS hammer. :) -- Doug White | FreeBSD: The Power to Serve dwhite@gumbysoft.com | www.FreeBSD.org