panic: thread's turnstile has pending threads

7.0-CURRENT FreeBSD 7.0-CURRENT #6: Fri Mar 30 07:14:23 PDT 2007 

Has anyone seen this?   This machine has dual CPUs plus two shared interrupt
8 port serial I/O cards under uart/puc.

db> where
Tracing pid 46 tid 100042 td 0xc404d000
kdb_enter(c0a4b308,1,c0a4f1b1,e4430bd0,c404d000,...) at kdb_enter+0x30
panic(c0a4f1b1,1,c0a4ef7e,24d,c0b56860,...) at panic+0x13b
turnstile_wait(c0b4f810,c4411d80,0,18b,c4411d82,...) at turnstile_wait+0x188
_mtx_lock_sleep(c0b4f810,c404d000,0,c0a4a388,95,...) at
_mtx_lock_sleep+0x18a
_mtx_lock_flags(c0b4f810,0,c0a4a388,95,e4430c94,...) at _mtx_lock_flags+0xef
lock_mtx(c0b4f810,0,c0a46e22,88,0,...) at lock_mtx+0x29
_cv_wait(c0b4fdf8,c0b4f810,c0a4cdd2,17a,0,...) at _cv_wait+0x2d3
_sx_slock(c0b4fde0,c0a4cdd2,17a,e4430cec,85,...) at _sx_slock+0xa2
schedcpu(c0a43646,3e8,e4430d24,c0738241,0,...) at schedcpu+0x45
schedcpu_thread(0,e4430d38,c0a48243,326,c4288000,...) at
schedcpu_thread+0x15
fork_exit(c076eee0,0,e4430d38) at fork_exit+0xd1
fork_trampoline() at fork_trampoline+0x8
--- trap 0, eip = 0, esp = 0xe4430d70, ebp = 0 ---
db> show alllocks
Process 41048 (sh) thread 0xc4411d80 (100072)
exclusive sleep mutex process lock r = 0 (0xc44104e0) locked
_at_ /usr/src/sys/ker7
exclusive sleep mutex process lock r = 0 (0xc72442a0) locked
_at_ /usr/src/sys/ker6
Process 13 (swi4: clock sio) thread 0xc3ee9a20 (100003)
exclusive sleep mutex Giant r = 0 (0xc0b4fd08) locked
_at_ /usr/src/sys/kern/kern_0
db> call doadump
Physical memory: 1011 MB
Dumping 173 MB: 158 142 126 110 94 78 62 46 30 14
Dump complete
= 0xf
db> reset
cpu_reset: Restarting BSP
cpu_reset_proxy: Stopped CPU 1
[...]
Checking for core dump on /dev/da0s1b...
savecore: reboot after panic: thread's turnstile has pending threads
savecore: writing core to vmcore.7


---
Mark Atkinson
atkin901_at_yahoo.com
(!wired)?(coffee++):(wired);