From owner-freebsd-stable@FreeBSD.ORG Mon Oct 22 00:59:03 2012 Return-Path: Delivered-To: stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id AD7A8539; Mon, 22 Oct 2012 00:59:03 +0000 (UTC) (envelope-from david@catwhisker.org) Received: from albert.catwhisker.org (m209-73.dsl.rawbw.com [198.144.209.73]) by mx1.freebsd.org (Postfix) with ESMTP id F160E8FC0A; Mon, 22 Oct 2012 00:59:02 +0000 (UTC) Received: from albert.catwhisker.org (localhost [127.0.0.1]) by albert.catwhisker.org (8.14.5/8.14.5) with ESMTP id q9M0x2uK003691; Sun, 21 Oct 2012 17:59:02 -0700 (PDT) (envelope-from david@albert.catwhisker.org) Received: (from david@localhost) by albert.catwhisker.org (8.14.5/8.14.5/Submit) id q9M0x2G7003690; Sun, 21 Oct 2012 17:59:02 -0700 (PDT) (envelope-from david) Date: Sun, 21 Oct 2012 17:59:02 -0700 From: David Wolfskill To: Kevin Oberman Subject: Re: stable/9 @r241776 panic: REDZONE: Buffer underflow detected... Message-ID: <20121022005902.GF1609@albert.catwhisker.org> References: <20121021121356.GJ35915@deviant.kiev.zoral.com.ua> <20121021163322.GB1730@albert.catwhisker.org> <20121021164634.GC1730@albert.catwhisker.org> <20121021174054.GM35915@deviant.kiev.zoral.com.ua> <50843EB6.8030407@FreeBSD.org> <20121021202346.GB1609@albert.catwhisker.org> <5084713A.1050200@FreeBSD.org> <508477A8.2040609@FreeBSD.org> <20121021224648.GE1609@albert.catwhisker.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="HKEL+t8MFpg/ASTE" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Cc: Alexander Motin , stable@freebsd.org X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 22 Oct 2012 00:59:04 -0000 --HKEL+t8MFpg/ASTE Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Oct 21, 2012 at 05:28:49PM -0700, Kevin Oberman wrote: > ... > This is starting to smell a bit like it may be tied to hardware. If > you have two memory cards, you might want to try swapping them. If > not, maybe let memtest86 run overnight. There are 2 SODIMMS, yes. So I reverted mjg@'s sys/kern/subr_bus.c patch, rebuilt the kernel, and rebooted ... without issue: I was unable to reproduce the problem. Despite my inability to reproduce it, I went ahead & powered down, swapped the SODIMMs, and rebooted. Still no recurrence. > Yes, this is a total shot in the dark, but this one is really weird > and when I see really weird, I start too look at hardware, especially > memory and power supply. (And this really does not sound like power > supply to me.) > ... The machine is a Dell Precision M4400, and I have extended to hardware warranty. So if I can actually demonstrate a real hardware issue -- in a way that Dell will accept -- I should be able to get it fixed. (I've had a fair bit of practice at that, as the warranty includes accidental damage -- and the time I got flipped off my bicycle while the machine was in a (padded) rucksack qualified.) That said, overnight is when the machine updates its local private mirrors of the FreeBSD SVN repositories, so I can start my daily rebuilds of stable/9 & head fairly early in the morning. (I prefer to get those -- as well as the port-updating -- completed before I get in to work, as I use the laptop to access all of the other machines I use. And I exercise the just-built stable/9 for the rest of the day....) Peace, david --=20 David H. Wolfskill david@catwhisker.org Taliban: Evil men with guns afraid of truth from a 14-year old girl. See http://www.catwhisker.org/~david/publickey.gpg for my public key. --HKEL+t8MFpg/ASTE Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (FreeBSD) iEYEARECAAYFAlCEmlUACgkQmprOCmdXAD3M/ACeI/6T2k/UFDjraQDObwG5MmtB cm4AoIFG/oHqlzUafAyrAUKzuEj4NUa1 =5KRG -----END PGP SIGNATURE----- --HKEL+t8MFpg/ASTE--