From owner-freebsd-bugs@FreeBSD.ORG Tue Sep 16 17:39:25 2008 Return-Path: Delivered-To: freebsd-bugs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6214B106566B; Tue, 16 Sep 2008 17:39:25 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from fallbackmx08.syd.optusnet.com.au (fallbackmx08.syd.optusnet.com.au [211.29.132.10]) by mx1.freebsd.org (Postfix) with ESMTP id CF1A08FC0A; Tue, 16 Sep 2008 17:39:24 +0000 (UTC) (envelope-from peterjeremy@optushome.com.au) Received: from mail15.syd.optusnet.com.au (mail15.syd.optusnet.com.au [211.29.132.196]) by fallbackmx08.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id m8G8Kmwr007509; Tue, 16 Sep 2008 18:20:48 +1000 Received: from server.vk2pj.dyndns.org (c122-106-215-175.belrs3.nsw.optusnet.com.au [122.106.215.175]) by mail15.syd.optusnet.com.au (8.13.1/8.13.1) with ESMTP id m8G8KegT013834 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 16 Sep 2008 18:20:41 +1000 X-Bogosity: Ham, spamicity=0.000000 Received: from server.vk2pj.dyndns.org (localhost.vk2pj.dyndns.org [127.0.0.1]) by server.vk2pj.dyndns.org (8.14.2/8.14.2) with ESMTP id m8G8Kee4045766; Tue, 16 Sep 2008 18:20:40 +1000 (EST) (envelope-from peter@server.vk2pj.dyndns.org) Received: (from peter@localhost) by server.vk2pj.dyndns.org (8.14.2/8.14.2/Submit) id m8G8KdiF045765; Tue, 16 Sep 2008 18:20:39 +1000 (EST) (envelope-from peter) Date: Tue, 16 Sep 2008 18:20:39 +1000 From: Peter Jeremy To: Chitti Nimmagadda Message-ID: <20080916082039.GX15376@server.vk2pj.dyndns.org> References: <200809160254.m8G2sGnk006774@freefall.freebsd.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="tuYRN1zEaS85jg/Y" Content-Disposition: inline In-Reply-To: <200809160254.m8G2sGnk006774@freefall.freebsd.org> X-PGP-Key: http://members.optusnet.com.au/peterjeremy/pubkey.asc User-Agent: Mutt/1.5.18 (2008-05-17) Cc: freebsd-bugs@freebsd.org, freebsd-amd64@freebsd.org Subject: Re: amd64/127397: [amd64] 32bit application on FreeBSD-6.3 amd64 gets SIGBUS X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Sep 2008 17:39:25 -0000 --tuYRN1zEaS85jg/Y Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable I can't quickly reproduce this on a roughly week old 6.4-PRERELEASE with a Turion64x2, though that system has been up for nearly 4 days. What else, if anything, is running on the system when it fails or doesn't fail? Does running lots of (especially large) processes before running your test reduce the likelihood of the failure occurring? Off the top of my head this looks like a race condition in the code that migrates i386 processes between CPUs - possibly a missing or misplaced memory barrier. Actually tracking this down is likely to be difficult. --=20 Peter Jeremy Please excuse any delays as the result of my ISP's inability to implement an MTA that is either RFC2821-compliant or matches their claimed behaviour. --tuYRN1zEaS85jg/Y Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (FreeBSD) iEYEARECAAYFAkjPbFcACgkQ/opHv/APuIdVtgCgwngCoUtqn0eo+eMwky6q2Xud 9IkAn2/CFsOf6j1cAe6QDIYD2Ch/X+ru =Jht8 -----END PGP SIGNATURE----- --tuYRN1zEaS85jg/Y--