LOR during boot

Hi,

I'm getting the following LOR on each boot, system works fine nevertheless:

...
Timecounters tick every 10.000 msec
ipfw2 initialized, divert disabled, rule-based forwarding enabled, 
default to deny, logging disabled
DUMMYNET initialized (011031)
IPv6 packet filtering initialized, logging disabled
IPsec: Initialized Security Association Processing.

lock order reversal
  1st 0xc03718e0 callout_dont_sleep (callout_dont_sleep) _at_ 
/usr/src/sys/kern/kern_timeout.c:223
  2nd 0xc0370c80 allproc (allproc) _at_ /usr/src/sys/kern/sched_4bsd.c:254
Stack backtrace:
backtrace(c032000b,c0370c80,c031c789,c031c789,c031e2e3) at backtrace+0x17
witness_lock(c0370c80,0,c031e2e3,fe,c06ec345) at witness_lock+0x686
_sx_slock(c0370c80,c031e2e3,fe,c03718e0,8) at _sx_slock+0xaa
schedcpu(0,0,c031dfd6,df,60b) at schedcpu+0x3f
softclock(0,0,c031acea,230,c21b03c8) at softclock+0x1ec
ithread_loop(c2198d00,df0e0d48,c031ab89,312,c21b2d10) at ithread_loop+0x167
fork_exit(c019a4ba,c2198d00,df0e0d48) at fork_exit+0xc3
fork_trampoline() at fork_trampoline+0x1a
--- trap 0x1, eip = 0, esp = 0xdf0e0d7c, ebp = 0 ---
Debugger("witness_lock")
Stopped at      Debugger+0x4f:  xchgl   %ebx,in_Debugger.0
db> c

Expensive timeout(9) function: 0xc01be517(0) 0.231687267 s
ata1-slave: timeout waiting for interrupt
ata1-slave: ATA identify failed
ad0: 78167MB <Maxtor 4D080H4> [158816/16/63] at ata0-master UDMA100
acd0: CD-RW <PHILIPS DVD+RW-D28> at ata1-master UDMA33
...

Lars
-- 
Lars Eggert <larse_at_isi.edu>           USC Information Sciences Institute