panic on reboot w. 9.0-BETA1

[Garrett Cooper]

On Thu, Aug 4, 2011 at 1:34 PM, kirk russell <kirk at ba23.org> wrote:
> I tried out the i386 9 Beta this week.  I get a panic when I reboot.

...

> You have new mail.
> kleenex# uname -a
> FreeBSD kleenex 9.0-BETA1 FreeBSD 9.0-BETA1 #0: Thu Jul 28 16:34:16
> UTC 2011     root at obrian.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC
> i386
> kleenex# reboot
> Aug  4 21:27:46 kleenex reboot: rebooted by root
> Aug  4 21:27:46 kleenex syslogd: exiting on signal 15
> Waiting (max 60 seconds) for system process `vnlru' to stop...done
> Waiting (max 60 seconds) for system process `bufdaemon' to stop...done
> Waiting (max 60 seconds) for system process `syncer' to stop...
> Syncing disks, vnodes remaining...2 0 0 done
> All buffers synced.
> lock order reversal:
>  1st 0xc50979e8 ufs (ufs) @ /usr/src/sys/kern/vfs_mount.c:1194
>  2nd 0xc5097e28 devfs (devfs) @ /usr/src/sys/kern/vfs_subr.c:2134
> KDB: stack backtrace:
> db_trace_self_wrapper(c0ef3bfa,75735f73,632e7262,3331323a,ee000a34,...)
> at db_trace_self_wrapper+0x26
> kdb_backtrace(c0a3d38b,c0ef7543,c4d3ebe8,c4d3eb18,ece479bc,...) at
> kdb_backtrace+0x2a
> _witness_debugger(c0ef7543,c5097e28,c0ede88b,c4d3eb18,c0eff221,...) at
> _witness_debugger+0x25
> witness_checkorder(c5097e28,9,c0eff221,856,0,...) at witness_checkorder+0x839
> __lockmgr_args(c5097e28,80500,c5097e48,0,0,...) atstray irq7
>  __lockmgr_args+0x804
> vop_stdlock(ece47adc,c0a4ebbb,c0edebb7,80500,c5097dd0,...) at vop_stdlock+0x62
> VOP_LOCK1_APV(c1012d00,ece47adc,c53580b0,c104d720,c5097dd0,...) at
> VOP_LOCK1_APV+0xb5
> _vn_lock(c5097dd0,80500,c0eff221,856,8,...) at _vn_lock+0x5e
> vget(c5097dd0,80500,c5358000,197,c5358000,...) at vget+0xb9
> devfs_allocv(c4ee2080,c522f000,80000,ece47b74,d8stray irq7
> 8,...) at devfs_allocv+0x105
> devfs_root(c522f000,80000,ece47bc0,4ef,ece47bf0,...) at devfs_root+0x52
> dounmount(c522f000,80000,c5358000,c4965c2c,0,...) at dounmount+0x421
> vfs_unmountall(c0eefb51,0,c0eefa9f,131,c5358000,...) at vfs_unmountall+0x4e
> kern_reboot(0,0,c0eefa9f,b2,c5450b00,...) at kern_reboot+0x450
> reboot(c5358000,ece47cec,ece47d80,ece47c88,0,...) at reboot+0x6c
> syscallenter(c5358000,ece47ce4,c0d34586,3,c1096ac0,...) at syscallenter+0x263
> syscall(ece47d28) at syscall+0x34
> Xint0x80_syscall() at Xint0x80_syscall+0x21
> --- syscall (55, FreeBSD ELF32, reboot), eip = 0x280b8f4b, esp =
> 0xbfbfeb5c, ebp = 0xbfbfeca8 ---
> Uptime: 1m10s
> Rebooting...

This is a well documented WITNESS LOR.
Thanks,
-Garrett