[zfs][hardware] Reproducible kernel panic in 8.0-STABLE

[Andriy Gapon]

on 02/02/2010 16:03 Stephane LAPIE said the following:
> Andriy Gapon wrote:
>> on 02/02/2010 15:32 Stephane LAPIE said the following:
>>> I have a case of kernel panic that can be consistently reproduced, and
>>> which I guess is related to the hardware I'm using (Marvell controllers,
>>> check my pciconf -lv output below).
>>>
>>> The kernel panic message is always, consistently, the following :
>>>
>>> Sleeping thread (tid 100021, pid 0) owns a non-sleepable lock
>>
>> I probably won't be able to help you, but to kickstart debugging could
>> you please
>> run 'procstat -t 0' and determine what kernel thread has tid 100021 on
>> your system?
> 
> Thanks for the tip. I will keep that one in mind, as I was wondering how
> you looked up individual threads.
> 
> # procstat -t 0 | grep 100021
>     0 100021 kernel           thread taskq       1   92 sleep   -
> 
> Is that the "kernel task queue" handler ?

This taskqueue "taskqueue_thread" which is used to schedule tasks in many places.
I would guess that one of those tasks leaked a lock.
Probably it's best to configure system for crashdumps to a reliable storage and
then try to examine a dump with kgdb to see what lock we have here.

-- 
Andriy Gapon