panic: mutex em1 not owned at /usr/src/sys/dev/em/if_em.c:1608

[Daniel M. Eischen]

Jun Kuriyama wrote:
> With today's current.
> 
> I got an panic when playing with net/freevrrpd.  I forgot to specify
> $dumpdev in /etc/rc.conf on this new test box, so I cannot get kernel
> core at this time...

Try removing line 771 of dev/em/if_em.c.  The call to em_stop() requires
the mutex to be locked, but it's not necessary because em_init() calls
em_stop() with the mutex held.

-- 
Dan Eischen