Date: Fri, 17 Apr 2009 14:28:37 -0500 From: Robert Noland <rnoland@FreeBSD.org> To: deeptech71@gmail.com Cc: freebsd-current@freebsd.org Subject: Re: diagnosing freezes (DRI?) Message-ID: <1239996517.24514.1.camel@balrog.2hip.net> 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>
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--=-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 <rnoland@FreeBSD.org> 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++--
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