From owner-freebsd-hackers@FreeBSD.ORG Thu Aug 25 21:53:52 2011 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DE88B1065675 for ; Thu, 25 Aug 2011 21:53:52 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from mail.zoral.com.ua (mx0.zoral.com.ua [91.193.166.200]) by mx1.freebsd.org (Postfix) with ESMTP id 5DC538FC0A for ; Thu, 25 Aug 2011 21:53:51 +0000 (UTC) Received: from deviant.kiev.zoral.com.ua (root@deviant.kiev.zoral.com.ua [10.1.1.148]) by mail.zoral.com.ua (8.14.2/8.14.2) with ESMTP id p7PLrncu008211 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 26 Aug 2011 00:53:49 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: from deviant.kiev.zoral.com.ua (kostik@localhost [127.0.0.1]) by deviant.kiev.zoral.com.ua (8.14.4/8.14.4) with ESMTP id p7PLrnSY050262; Fri, 26 Aug 2011 00:53:49 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: (from kostik@localhost) by deviant.kiev.zoral.com.ua (8.14.4/8.14.4/Submit) id p7PLrnuP050261; Fri, 26 Aug 2011 00:53:49 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: deviant.kiev.zoral.com.ua: kostik set sender to kostikbel@gmail.com using -f Date: Fri, 26 Aug 2011 00:53:49 +0300 From: Kostik Belousov To: Charlie Martin Message-ID: <20110825215348.GW17489@deviant.kiev.zoral.com.ua> References: <4E56BB99.6030706@sgi.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="QWHkWXETW2F1vgkC" Content-Disposition: inline In-Reply-To: <4E56BB99.6030706@sgi.com> User-Agent: Mutt/1.4.2.3i X-Virus-Scanned: clamav-milter 0.95.2 at skuns.kiev.zoral.com.ua X-Virus-Status: Clean X-Spam-Status: No, score=-3.3 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00, DNS_FROM_OPENWHOIS autolearn=no version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on skuns.kiev.zoral.com.ua Cc: freebsd-hackers@freebsd.org Subject: Re: Where to ask about a 7.2 bug, and debugging sys/queue.h errors X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Aug 2011 21:53:52 -0000 --QWHkWXETW2F1vgkC Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Aug 25, 2011 at 03:16:09PM -0600, Charlie Martin wrote: > We're having a crash in some internal code running on FreeBSD 7.2=20 > (specifically 7.2-PRERELEASE FreeBSD 7.2-PRERELEASE and yeah, I know=20 > it's quite a bit behind) in which after 18-30 hours of running load=20 > tests, the code panics with: >=20 > panic: Bad link elm 0xffffff0044c09600 next->prev !=3D elm > cpuid =3D 0 > KDB: stack backtrace: > db_trace_self_wrapper() at 0xffffffff8019119a =3D db_trace_self_wrapper+0= x2a > panic() at 0xffffffff80307c72 =3D panic+0x182 > devfs_populate_loop() at 0xffffffff802a43a8 =3D devfs_populate_loop+0x548 >=20 >=20 > First question: where's the most appropriate place to ask about this=20 > kind of bug on a back version. It is fine to ask there. >=20 > Second: does this remind anyone of any bugs? Googling came up with a=20 > few somewhat similar things but hasn't provided much insight so far. In 99% of the cases, it means that you forgot to dev_ref() some cdev. --QWHkWXETW2F1vgkC Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (FreeBSD) iEYEARECAAYFAk5WxGwACgkQC3+MBN1Mb4iOvgCg5v6t/Xmr7axl/G6cCBPFTD9k IzgAoKbFdo3Nj5cNcJP9XnX/wnQTbnNW =1nG/ -----END PGP SIGNATURE----- --QWHkWXETW2F1vgkC--