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

Hi Grzegorz,

If you have another machine connected by network that you can install
and start netdumpd on, and; ipv4 configured on a supported network
device before the machine paniced; and a recent CURRENT; you should be
able to initiate a kernel dump over the network with 'netdump -s
server-ip' in DDB.  In more complicated situations you might also need
to specify '-g gateway-ip -c client-ip -i interface', but for servers
on the LAN or available via the default gateway route, the former
ought to work.

Best,
Conrad

On Sat, May 2, 2020 at 6:56 AM Grzegorz Junka <list1_at_gjunka.com> wrote:
>
>
> 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?
> >
> > _______________________________________________
> > freebsd-current_at_freebsd.org mailing list
> > https://lists.freebsd.org/mailman/listinfo/freebsd-current
> > To unsubscribe, send any mail to
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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
>
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