panic: sleeping thread

Marc G. Fournier scrappy at hub.org
Tue Dec 12 13:45:12 PST 2006


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- --On Tuesday, December 12, 2006 16:12:50 -0500 John Baldwin <jhb at freebsd.org> 
wrote:

> On Tuesday 12 December 2006 15:47, Marc G. Fournier wrote:
>>
>> --On Monday, December 11, 2006 17:40:22 -0500 John Baldwin <jhb at freebsd.org>
>> wrote:
>>
>> > Maybe use ssh -e none?  You don't need to break into ddb though, when it
>> > panics it will print out more useful info on its own.
>>
>> Ah, like:
>>
>> Sleeping thread (tid 101409, pid 78573) owns a non-sleepable lock
>> sched_switch() at sched_switch+0x11f
>> mi_switch() at mi_switch+0x14c
>> sleepq_wait() at sleepq_wait+0x5b
>> cv_wait() at cv_wait+0xed
>> _sx_xlock() at _sx_xlock+0x51
>> vm_map_lookup() at vm_map_lookup+0x3c
>> vm_fault() at vm_fault+0xba
>> trap_pfault() at trap_pfault+0x127
>> trap() at trap+0x1bd
>> calltrap() at calltrap+0x5
>> --- trap 0xc, rip = 0xffffffff801f8c91, rsp = 0xffffffffb908a930, rbp =
>> 0xffffff
>> ffb908a970 ---
>> _mtx_trylock() at _mtx_trylock+0x1
>> unlock_and_deallocate() at unlock_and_deallocate+0x10e
>> vm_fault() at vm_fault+0x1ca0
>> trap_pfault() at trap_pfault+0x127
>> trap() at trap+0x3e6
>> calltrap() at calltrap+0x5
>> --- trap 0xc, rip = 0x8028d9bf7, rsp = 0x7fffffffe900, rbp =
> 0x7fffffffe900 ---
>> panic: sleeping thread
>> cpuid = 1
>
> Yeah.  The LOR is bogus though, it's a secondary effect.  The real problem is
> the fault in _mtx_trylock(), and that's probably due to a bug in the previous
> frame in unlock_and_deallocate().  If you can get a core dump that would be
> most helpful.

That woudl take being able to get into DDB from an SSH session ;)

I'll try the -e none the next time it crashes, unless someone else has another 
idea for doing it?  Actually, I'll try the -e none after its up again, instead 
of waiting ...


- ----
Marc G. Fournier           Hub.Org Networking Services (http://www.hub.org)
Email . scrappy at hub.org                              MSN . scrappy at hub.org
Yahoo . yscrappy               Skype: hub.org        ICQ . 7615664
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