panic: Assertion lock == sq->sq_lock failed at /usr/src-13/sys/kern/subr_sleepqueue.c:371

[Grzegorz Junka]

On 02/05/2020 14:15, Grzegorz Junka wrote:
> cpuid = 3
>
> time = 1588422616
>
> KDB: stack backtrace:
>
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 
> 0xfffffe00b27e86b0
>
> vpanic() at vpanic+0x182/frame 0xfffffe00b27e8700
>
> panic() at panic+0x43/frame ...
>
> sleepq_add()
>
> ...
>
> I see
>
> db>
>
> in the terminal. I tried "dump" but it says, Cannot dump: no dump 
> device specified.
>
> Is there a guide how to deal wit those, i.e. to gather information 
> required to investigate issues?
>
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OK, I found this handbook 
https://www.freebsd.org/doc/en/books/developers-handbook/book.html#kerneldebug

Obviously something must have been misconfigured that I can't dump the 
core now. Is there anything I can fetch from the system while I am in 
db> or I should just forget and restart?

GrzegorzJ