Re: kern/42455: tstile hang with nfs

["Christoph Egger" <Christoph_Egger%gmx.de@localhost>]

I reproduced it again:

db> ps /w
PID   LID          COMMAND     EMUL  PRI WAIT-MSG    WAIT-CHANNEL
619   732          qemu-dm   netbsd   43              0
619     2          qemu-dm   netbsd   43 netio        ffffa00001310a88
619     1          qemu-dm   netbsd   34 genput       ffffa00000415d40

db> show lock 0xffffa00001310a88
lock address : 0xffffa00001310a88 type     :               spin
initialized  : 0xffffffff806449e3 interlock: 0xffffa000260da780

'initialized' points to sys/kern/uipc_socket2.c:326

db> show lock 0xffffa000260da780
lock address : 0xffffa000260da780 type     :     sleep/adaptive
initialized  : 0xffffffff80405e28
shared holds :                  0 exclusive:                  0
shares wanted:                  0 exclusive:                  0
current cpu  :                  0 last held:                  0
current lwp  : 0xffffa0002320ec00 last held: 000000000000000000
last locked  : 0xffffffff8064238e unlocked : 0xffffffff803ef060
owner field  : 000000000000000000 wait/spin:                0/0

Turnstile chain at 0xffffffff80c385c0.
=> No active turnstile for this lock.

'initialized' points to sys/kern/kern_mutex_obj.c:92 ,
'last locked' points to sys/sys/socketvar.h:475
and 'unlocked' points to sys/kern/kern_condvar.c:154