Re: kern/38246: another simple_lock deadlock in netbsd-4, possibly scheduler related (sa_switch(2073.2): no upcall data.)

[yamt%mwd.biglobe.ne.jp@localhost (YAMAMOTO Takashi)]

> [Sun Mar 16 11:39:33 2008]db{0}> trace
> [Sun Mar 16 11:39:36 2008]cpu_Debugger(d95456f4,1,ffff,c095b5c7,c041cfe0) at 
> netbsd:cpu_Debugger+0x4
> [Sun Mar 16 11:39:36 
> 2008]_simple_lock_assert_unlocked(c09de194,c093178f,c0989310,2fc,596) at 
> netbsd:_simple_lock_assert_unlocked+0x135
> [Sun Mar 16 11:39:36 2008]wakeup(c5e9ce6c,c09875cc,4eb,d9545780,0) at 
> netbsd:wakeup+0x32
> [Sun Mar 16 11:39:36 2008]knote_enqueue(c5e9de58,0,d95457cc,c03c87d9,c) at 
> netbsd:knote_enqueue+0x1ae
> [Sun Mar 16 11:39:36 2008]knote(c0a6dfd0,0,32373032,c,d9668018) at 
> netbsd:knote+0x42
> [Sun Mar 16 11:39:36 2008]logwakeup(c0988f88,5,0,0,d95457d0) at 
> netbsd:logwakeup+0x34
> [Sun Mar 16 11:39:36 2008]printf(c0988f88,819,2,3a7,c0a564d0) at 
> netbsd:printf+0xc5
> [Sun Mar 16 11:39:36 2008]sa_switch(d93f6208,0,2,238,d967aa84) at 
> netbsd:sa_switch+0x3eb

see PR/20536.

YAMAMOTO Takashi