Date: Sun, 29 Jan 2006 22:21:41 +0100 From: Erik Winge <erik.winge@gmail.com> To: freebsd-current@freebsd.org Subject: lor in drm_drv/vm_glue? Message-ID: <4cf221cc0601291321i586012dbnb7125e4973bce1bd@mail.gmail.com>
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Hi all, I got the following LOR with -current from yesterday. lock order reversal: (sleepable after non-sleepable) 1st 0xc2f304d4 drm device (drm device) @ /usr/src/sys/modules/drm/drm/../../../dev/drm/drm_drv.c:904 2nd 0xc332d464 user map (user map) @ /usr/src/sys/vm/vm_glue.c:182 KDB: stack backtrace: witness_checkorder(c332d464,9,c0636c35,b6,c0626c4b) at witness_checkorder+0= x67a _sx_xlock(c332d464,c0636c35,b6,c0677d14,1000008) at _sx_xlock+0x5c useracc(aa6e600,8,1,c04cfcd3,c33c3012) at useracc+0x66 i915_batchbuffer(c3330400,80186443,c345f8c0,3,c3417d00) at i915_batchbuffer+0x358 drm_ioctl(c3330400,80186443,c345f8c0,3,c3417d00) at drm_ioctl+0x1af giant_ioctl(c3330400,80186443,c345f8c0,3,c3417d00) at giant_ioctl+0x56 devfs_ioctl_f(c337f4c8,80186443,c345f8c0,c346aa80,c3417d00) at devfs_ioctl_f+0x66 ioctl(c3417d00,d63bed04,c,d63bec9c,3) at ioctl+0x118 syscall(3b,2862003b,bfbf003b,af89c10,10) at syscall+0x164 Xint0x80_syscall() at Xint0x80_syscall+0x1f --- syscall (54, FreeBSD ELF32, ioctl), eip =3D 0x28602123, esp =3D 0xbfbfe3ec, ebp=3D 0xbfbfe408 --- Erik
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