https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200319

--- Comment #16 from Kristof Provost <k...@freebsd.org> ---
Thanks Oleg,

The demo script nvass attached also worked for me to trigger the problem. I've
not yet tried your setup, but I'm confident it'll also work.

I think I understand the problem in general terms (but I need to look at
details for the full story). Basically, carp and bridge deadlock against each
other because carp calls into bridge which calls into carp (or vice versa).

I believe the patch in D3133 is not correct. (See also ae@'s comment there.) It
removes locking protection where it should be present, and this is what seems
to fix the problem.

This issue is still on my todo list, but I can't promise when I'll get the time
to look into it.

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