[Bug 143622] [pfil] [patch] unlock pfil lock while calling firewall hooks

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=143622

Kristof Provost <kp at freebsd.org> changed:

           What    |Removed                     |Added
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                 CC|                            |kp at freebsd.org

--- Comment #5 from Kristof Provost <kp at freebsd.org> ---
(In reply to Max Laier from comment #2)
While rmlocks are relatively lightweight there is still a non-zero overhead.
For the purposes of a test the lock can simply be removed, and without it I see
~2% more packets per second in pf than with it.
I've been thinking about replacing it with a CK_LIST and epoch based cleanup,
but I stopped working on it when I spotted that ipfw relies on the lock. It
should be possible to move that into ipfw, but I'm not sure the 2% is worth
that work.

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