From owner-freebsd-net@FreeBSD.ORG  Mon Mar 19 18:52:35 2007
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Date: Mon, 19 Mar 2007 18:52:32 +0000
From: Bruce M Simpson <bms@incunabulum.net>
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Subject: [PATCH] Multicast refcounting in network stack
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Hi,

A patch against -CURRENT is now available:
    http://people.freebsd.org/~bms/dump/multi_refcounting.diff

This is a fairly sweeping architectural change which should resolve 
memory leaks and potential panics with the network stack as a whole, to 
better support interface detach at runtime.

I'd like to check it in as soon as possible as it fixes the root cause 
of the problems we have had with carp and pfsync in our stack. NetBSD 
has implemented refcounting like this for some time now, so it does not 
suffer from the same problems.

Regards,
BMS