From owner-freebsd-sparc64@FreeBSD.ORG Sun May 18 23:59:14 2014 Return-Path: Delivered-To: freebsd-sparc64@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id C78D2516 for ; Sun, 18 May 2014 23:59:14 +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 891BA2850 for ; Sun, 18 May 2014 23:59:14 +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 s4INwsgd006208 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Sun, 18 May 2014 19:58:54 -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 s4INwsDU035810; Sun, 18 May 2014 19:58:54 -0400 Received: (from nwf@localhost) by gradx.cs.jhu.edu (8.14.8/8.14.8/Submit) id s4INwrFs035809; Sun, 18 May 2014 19:58:53 -0400 Date: Sun, 18 May 2014 19:58:53 -0400 From: Nathaniel W Filardo To: Chris Ross Subject: Re: FreeBSD 10-STABLE/sparc64 panic Message-ID: <20140518235853.GM24043@gradx.cs.jhu.edu> References: <20140518083413.GK24043@gradx.cs.jhu.edu> <751F7778-95CE-40FC-857F-222FB37737C0@distal.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="wAI/bQb0EMvlZCHl" Content-Disposition: inline In-Reply-To: <751F7778-95CE-40FC-857F-222FB37737C0@distal.com> 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: Sun, 18 May 2014 23:59:14 -0000 --wAI/bQb0EMvlZCHl Content-Type: text/plain; charset=us-ascii Content-Disposition: inline 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 obvious candidate > of the four mentioned, as it's the only big one. At that point we'll need someone > pretty familiar with the networking parts of the kernel and sparc64, and I'm > certain I can't fill that role. 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 still 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. Cheers, --nwf; --wAI/bQb0EMvlZCHl Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlN5ST0ACgkQTeQabvr9Tc/5DQCeNwbP8miAhfWvLgrgatTPslnI MOEAniH5OfvhIi9Qabg0B6VdLYXFCkrO =BZ3I -----END PGP SIGNATURE----- --wAI/bQb0EMvlZCHl--