From owner-freebsd-current@FreeBSD.ORG Fri Apr 17 19:29:46 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 8DFCE1065672 for ; Fri, 17 Apr 2009 19:29:46 +0000 (UTC) (envelope-from rnoland@FreeBSD.org) Received: from gizmo.2hip.net (gizmo.2hip.net [64.74.207.195]) by mx1.freebsd.org (Postfix) with ESMTP id 4E9358FC22 for ; Fri, 17 Apr 2009 19:29:45 +0000 (UTC) (envelope-from rnoland@FreeBSD.org) Received: from [192.168.1.156] (adsl-156-16-27.bna.bellsouth.net [70.156.16.27]) (authenticated bits=0) by gizmo.2hip.net (8.14.3/8.14.3) with ESMTP id n3HJTe8c035688 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 17 Apr 2009 15:29:40 -0400 (EDT) (envelope-from rnoland@FreeBSD.org) From: Robert Noland To: deeptech71@gmail.com In-Reply-To: <49E7FED0.9090708@gmail.com> References: <49E6ACEE.6080301@gmail.com> <200904161116.58094.jhb@freebsd.org> <1239913234.1991.1.camel@balrog.2hip.net> <49E7FED0.9090708@gmail.com> Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-P92RlnQWBqcFZVDCj7++" Organization: FreeBSD Date: Fri, 17 Apr 2009 14:28:37 -0500 Message-Id: <1239996517.24514.1.camel@balrog.2hip.net> Mime-Version: 1.0 X-Mailer: Evolution 2.26.0 FreeBSD GNOME Team Port X-Spam-Status: No, score=-3.2 required=5.0 tests=AWL,BAYES_00,RDNS_DYNAMIC autolearn=no version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on gizmo.2hip.net Cc: freebsd-current@freebsd.org Subject: Re: diagnosing freezes (DRI?) 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, 17 Apr 2009 19:29:47 -0000 --=-P92RlnQWBqcFZVDCj7++ Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Fri, 2009-04-17 at 06:00 +0200, deeptech71@gmail.com wrote: > Robert Noland wrote: > > On Thu, 2009-04-16 at 11:16 -0400, John Baldwin wrote: > >> On Wednesday 15 April 2009 11:58:38 pm deeptech71@gmail.com wrote: > >>> I can reliably (~40%) reproduce a freeze, which I think is related. > >>> > >>> Using the GENERIC debug kernel built from SVN HEAD: > >>> > >>> # cd /usr/obj/usr/src/sys/GENERIC/ > >>> # kgdb kernel.debug /var/crash/vmcore.0 > >>> GNU gdb 6.1.1 [FreeBSD] > >>> Copyright 2004 Free Software Foundation, Inc. > >>> GDB is free software, covered by the GNU General Public License, and = you are > >>> welcome to change it and/or distribute copies of it under certain=20 > >>> conditions. > >>> Type "show copying" to see the conditions.=20 > >>> > >>> There is absolutely no warranty for GDB. Type "show warranty" for=20 > >>> details. > >>> This GDB was configured as "i386-marcel-freebsd"...=20 > >> [ snipped lots of stuff ] > >> > >>> Kernel page fault with the following non-sleepable locks held:=20 > >>> > >>> exclusive sleep mutex drmdev (drmdev) r =3D 0 (0xc373f860) locked @=20 > >>> /usr/src/sys/modules/drm/drm/../../../dev/drm/drm_drv.c:777=20 > >>> > >>> KDB: stack backtrace:=20 > >>> > >>> calltrap() at calltrap+0x6=20 > >>> > >>> --- trap 0xc, eip =3D 0xc0b611b6, esp =3D 0xd67d4a98, ebp =3D 0xd67d4= b48 ---=20 > >>> > >>> slow_copyin(c373f800,c4103300,c42e64e0,d67d4b64,0,...) at=20 > >>> slow_copyin+0x6 > >>> radeon_cp_texture(c373f800,c42e64e0,c4103300,309,c0c26218,...) at=20 > >>> radeon_cp_texture+0x199=20 > >>> > >>> drm_ioctl(c39d4e00,c018644e,c42e64e0,3,c40afaf0,...) at drm_ioctl+0x3= 56=20 > >>> > >> The drm code is doing a copyin() while holding a mutex (which is not a= llowed). > >=20 > > Ok, the quick and dirty fix for this is > > http://people.freebsd.org/~rnoland/drm_radeon_state-copyin-fix.patch > >=20 > > I think there may be other places of concern though and a more proper > > fix is needed. >=20 > I still get the same lockup :( It can't be the same backtrace though... I'll get a more complete patch put together shortly. robert. > _______________________________________________ > freebsd-current@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org= " --=20 Robert Noland FreeBSD --=-P92RlnQWBqcFZVDCj7++ Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.11 (FreeBSD) iEYEABECAAYFAkno2GUACgkQM4TrQ4qfROOWwQCbBicVAG6Pv2ahD9t9/DtsK4un atMAnAlnIYGTFJWePfLfNyk15a0UU49F =RHSV -----END PGP SIGNATURE----- --=-P92RlnQWBqcFZVDCj7++--