Date: Wed, 21 Sep 2011 12:55:13 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: Andriy Gapon <avg@freebsd.org> Cc: Lawrence Stewart <lstewart@freebsd.org>, freebsd-x11@freebsd.org Subject: Re: Deterministic panic 9.0-BETA2 with X + drm/radeon Message-ID: <20110921095513.GI1511@deviant.kiev.zoral.com.ua> In-Reply-To: <4E79AF56.2040703@FreeBSD.org> References: <4E798E66.1020603@freebsd.org> <4E79AF56.2040703@FreeBSD.org>
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--SUygiN5FMnIY1JbD Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Sep 21, 2011 at 12:33:10PM +0300, Andriy Gapon wrote: > on 21/09/2011 10:12 Lawrence Stewart said the following: > > Kernel page fault with the following non-sleepable locks held: > > exclusive sleep mutex drmdev (drmdev) r =3D 0 (0xfffffe000f831ca0) lock= ed @ > > /usr/src/sys/modules/drm/drm/../../../dev/drm/drm_drv.c:791 >=20 > I think that this is a well-known but not yet fixed issue. > I think that it should already be addressed in the general drm part of ki= b's > Intel GEM code. > Please see this thread for some earlier history: > http://lists.freebsd.org/pipermail/freebsd-current/2010-November/020914.h= tml >=20 It is, but only for Intel driver. The approach cannot be applied to the old dri1 drm drivers, because they need the drm device lock held in the interrupt handler. > I personally keep using a patch from that thread which turns the panic in= to a LOR. >=20 > > KDB: stack backtrace: > > db_trace_self_wrapper() at db_trace_self_wrapper+0x2a > > kdb_backtrace() at kdb_backtrace+0x37 > > _witness_debugger() at _witness_debugger+0x2e > > witness_warn() at witness_warn+0x2c4 > > trap() at trap+0x2fe > > calltrap() at calltrap+0x8 > > --- trap 0xc, rip =3D 0xffffffff80b09af3, rsp =3D 0xffffff834d687950, r= bp =3D > > 0xffffff834d6879a0 --- > > copyout() at copyout+0x43 > > drm_ioctl() at drm_ioctl+0x2f2 > > devfs_ioctl_f() at devfs_ioctl_f+0x7a > > kern_ioctl() at kern_ioctl+0xcd > > ioctl() at ioctl+0xfd > > amd64_syscall() at amd64_syscall+0x3ba > > Xfast_syscall() at Xfast_syscall+0xf7 > > --- syscall (54, FreeBSD ELF64, ioctl), rip =3D 0x802ca437c, rsp =3D 0x= 7fffffffd968, > > rbp =3D 0x7fffffffd9b0 --- >=20 >=20 > --=20 > Andriy Gapon > _______________________________________________ > freebsd-x11@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-x11 > To unsubscribe, send any mail to "freebsd-x11-unsubscribe@freebsd.org" --SUygiN5FMnIY1JbD Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (FreeBSD) iEYEARECAAYFAk55tIEACgkQC3+MBN1Mb4jUcQCfRr3w94QvjkrZiVrhjynVRXeT WKgAoIsmh3j3oV1JkDyUXR/fpdwTfmIW =tng1 -----END PGP SIGNATURE----- --SUygiN5FMnIY1JbD--
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