From owner-freebsd-sparc64@FreeBSD.ORG Mon May 19 14:52:36 2014 Return-Path: Delivered-To: freebsd-sparc64@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 377B4C3C for ; Mon, 19 May 2014 14:52:36 +0000 (UTC) Received: from blaze.cs.jhu.edu (blaze.cs.jhu.edu [128.220.13.50]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.cs.jhu.edu", Issuer "InCommon Server CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id D15FA2420 for ; Mon, 19 May 2014 14:52:35 +0000 (UTC) Received: from gradx.cs.jhu.edu (gradx.cs.jhu.edu [128.220.13.52]) by blaze.cs.jhu.edu (8.14.4/8.14.4) with ESMTP id s4JEqMQR022674 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 19 May 2014 10:52:22 -0400 Received: from gradx.cs.jhu.edu (localhost [127.0.0.1]) by gradx.cs.jhu.edu (8.14.8/8.14.5) with ESMTP id s4JEqMSd026173; Mon, 19 May 2014 10:52:22 -0400 Received: (from nwf@localhost) by gradx.cs.jhu.edu (8.14.8/8.14.8/Submit) id s4JEqMAT026172; Mon, 19 May 2014 10:52:22 -0400 Date: Mon, 19 May 2014 10:52:22 -0400 From: Nathaniel W Filardo To: Chris Ross Subject: Re: FreeBSD 10-STABLE/sparc64 panic Message-ID: <20140519145222.GN24043@gradx.cs.jhu.edu> References: <20140518083413.GK24043@gradx.cs.jhu.edu> <751F7778-95CE-40FC-857F-222FB37737C0@distal.com> <20140518235853.GM24043@gradx.cs.jhu.edu> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="Ie5iOtK4e9kgqh2F" Content-Disposition: inline In-Reply-To: <20140518235853.GM24043@gradx.cs.jhu.edu> User-Agent: Mutt/1.5.23 (2014-03-12) Cc: freebsd-sparc64@freebsd.org X-BeenThere: freebsd-sparc64@freebsd.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Porting FreeBSD to the Sparc List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 May 2014 14:52:36 -0000 --Ie5iOtK4e9kgqh2F Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, May 18, 2014 at 07:58:53PM -0400, Nathaniel W Filardo wrote: > On Sun, May 18, 2014 at 01:06:41PM -0400, Chris Ross wrote: > > Nathaniel, I assume you saw Eric's email saying he'd narrowed it down= to > > r263478? If that's accurate, it links it to four revisions from head. = So, that > > is a big head start on the bisection... I'd think r262763 is the obvio= us candidate > > of the four mentioned, as it's the only big one. At that point we'll n= eed someone > > pretty familiar with the networking parts of the kernel and sparc64, an= d I'm > > certain I can't fill that role. >=20 > Indeed. After staring at the changes for a while and getting nowhere, on= a > whim, I removed everything of substance in that commit in a new build of = the > head of stable/10 branch (that is, I nuked all the counter_* calls and > renamed the counter entry so that I was sure I didn't miss any) and it st= ill > panic()d in the same way. Nothing else looks like it could possibly > manipulate spinlocks, so just to be sure I'm re-bisecting. If this > bisection yields the same result, I'll probably try diffing the generated > assembler, but I'm not sure what I expect to see from that. I am having trouble bisecting, and it's slow going, but I should report that a clean build of dbd9b17 (r262853), which is well before 03fdc293 (r263478) -- also exhibits this problem. I believe 04e37d68 also problematic, just in case anyone else is out there looking, but I may have flubbed testing that one. Will report back soon. --nwf; --Ie5iOtK4e9kgqh2F Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlN6GqUACgkQTeQabvr9Tc8NUQCfRJM+Gtpa0LfHSaUyML+AVZxN ISUAnRJlllYTBIbVLsreAXISaYGbFl1Y =52m5 -----END PGP SIGNATURE----- --Ie5iOtK4e9kgqh2F--