On Fri, 2009-04-17 at 06:00 +0200, deeptech71_at_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_at_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 > >>> conditions. > >>> Type "show copying" to see the conditions. > >>> > >>> There is absolutely no warranty for GDB. Type "show warranty" for > >>> details. > >>> This GDB was configured as "i386-marcel-freebsd"... > >> [ snipped lots of stuff ] > >> > >>> Kernel page fault with the following non-sleepable locks held: > >>> > >>> exclusive sleep mutex drmdev (drmdev) r = 0 (0xc373f860) locked _at_ > >>> /usr/src/sys/modules/drm/drm/../../../dev/drm/drm_drv.c:777 > >>> > >>> KDB: stack backtrace: > >>> > >>> calltrap() at calltrap+0x6 > >>> > >>> --- trap 0xc, eip = 0xc0b611b6, esp = 0xd67d4a98, ebp = 0xd67d4b48 --- > >>> > >>> slow_copyin(c373f800,c4103300,c42e64e0,d67d4b64,0,...) at > >>> slow_copyin+0x6 > >>> radeon_cp_texture(c373f800,c42e64e0,c4103300,309,c0c26218,...) at > >>> radeon_cp_texture+0x199 > >>> > >>> drm_ioctl(c39d4e00,c018644e,c42e64e0,3,c40afaf0,...) at drm_ioctl+0x356 > >>> > >> The drm code is doing a copyin() while holding a mutex (which is not allowed). > > > > Ok, the quick and dirty fix for this is > > http://people.freebsd.org/~rnoland/drm_radeon_state-copyin-fix.patch > > > > I think there may be other places of concern though and a more proper > > fix is needed. > > 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_at_freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org" -- Robert Noland <rnoland_at_FreeBSD.org> FreeBSD
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