From owner-freebsd-current@FreeBSD.ORG Fri May 25 18:09:46 2007 Return-Path: X-Original-To: Current@freebsd.org Delivered-To: freebsd-current@FreeBSD.ORG Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id BA3E416A468; Fri, 25 May 2007 18:09:46 +0000 (UTC) (envelope-from marcus@marcuscom.com) Received: from creme-brulee.marcuscom.com (creme-brulee.marcuscom.com [24.172.16.118]) by mx1.freebsd.org (Postfix) with ESMTP id 58BAF13C455; Fri, 25 May 2007 18:09:46 +0000 (UTC) (envelope-from marcus@marcuscom.com) Received: from [10.2.1.101] (vpn-client-101.marcuscom.com [10.2.1.101]) by creme-brulee.marcuscom.com (8.14.1/8.14.1) with ESMTP id l4PI9u9A087267; Fri, 25 May 2007 14:09:57 -0400 (EDT) (envelope-from marcus@marcuscom.com) Message-ID: <4657267C.2070306@marcuscom.com> Date: Fri, 25 May 2007 14:10:04 -0400 From: Joe Marcus Clarke Organization: MarcusCom, Inc. User-Agent: Thunderbird 2.0.0.0 (Macintosh/20070326) MIME-Version: 1.0 To: Attilio Rao References: <1179962663.75721.6.camel@shumai.marcuscom.com> <20070523165051.G9443@10.0.0.1> <4655D5C1.2010905@FreeBSD.org> <1180022919.10757.24.camel@shumai.marcuscom.com> <3bbf2fe10705240930o10f37febt9fb5f0a46bd193c3@mail.gmail.com> In-Reply-To: <3bbf2fe10705240930o10f37febt9fb5f0a46bd193c3@mail.gmail.com> X-Enigmail-Version: 0.95.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-4.4 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.1.8 X-Spam-Checker-Version: SpamAssassin 3.1.8 (2007-02-13) on creme-brulee.marcuscom.com Cc: Jeff Roberson , Current@freebsd.org Subject: Re: Panic on -CURRENT after LDT changes X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 25 May 2007 18:09:46 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Attilio Rao wrote: > 2007/5/24, Joe Marcus Clarke : >> On Thu, 2007-05-24 at 20:13 +0200, Attilio Rao wrote: >> > Jeff Roberson wrote: >> > > Thanks, Attilio and I will look at this right away. >> > > >> > > Jeff >> > > >> > > On Wed, 23 May 2007, Joe Marcus Clarke wrote: >> > > >> > >> On a -CURRENT build today with Jeff's LDT locking changes, I get an >> > >> instant, reproducible panic by doing: >> > >> >> > >> # cd /usr/src >> > >> # make -DNO_CLEAN buildworld >> > >> >> > >> Backing out the LDT changes to /sys/i386/i386/*machdep* corrects the >> > >> problem. Here is a dmesg and backtrace. In frame 6, it appears >> mdp is >> > >> NULL (i.e. td->td_proc->p_md = 0x0). >> > >> > Did you enable WITNESS/INVARIANTS/INVARIANT_SUPPORT? >> >> No, this kernel does not have WITNESS or INVARIANTS. I can enable those >> tomorrow if that would give you more useful information. > > It would be very appreciated, since I've been unable to reproduce your > panic on a centrino dual core. I'm stopped in the debugger now with WITNESS and friends enabled. Same backtrace as before. I did a "show locks" and I see: exclusive spin mutex descriptor tables r = 0 (0xc08369f8) locked @ /usr/src/sys/i386/i386/sys_machdep.c:629 Please let me know what else you'd like to see while I'm at the debugger. FYI: this is a Pentium 4 with "options SMP" disabled. Joe - -- PGP Key : http://www.marcuscom.com/pgp.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFGVyZ8b2iPiv4Uz4cRAmMEAJwK6LoqXTtiA/XxD/IhsWxgIaJLNgCgj0iI wRRxfWOA+k3VV678FIJ4Vxs= =rvhj -----END PGP SIGNATURE-----