[Bug 206053] kqueue support code of netmap causes panic

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=206053

--- Comment #2 from Konstantin Belousov <kib at FreeBSD.org> ---
(In reply to Sean Bruno from comment #1)
I think replacing 1 with 0 in the
sys/dev/netmap/netmap_freebsd.c:netmap_kqfilter(), the call to knlist_add()
would fix the issue at hand.

But the panic probably means that netmap authors never ever run the code with
INVARIANTS and WITNESS.

Also, there are other comments in the netmap_freebsd.c, esp. about 'not even
munmap() on close()' which are, together with conslusions made, at least
strange.

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