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Date:      Tue, 9 Aug 2005 11:29:11 -0400
From:      Ed Maste <emaste@phaedrus.sandvine.ca>
To:        Robert Watson <rwatson@FreeBSD.org>
Cc:        freebsd-net@freebsd.org
Subject:   Re: Multicast locking LOR
Message-ID:  <20050809152911.GA72933@sandvine.com>
In-Reply-To: <20050808223106.P67598@fledge.watson.org>
References:  <20050808190024.GA4843@sandvine.com> <20050808223106.P67598@fledge.watson.org>

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On Mon, Aug 08, 2005 at 10:34:53PM +0100, Robert Watson wrote:

> Could you add a hard-coded entry to WITNESS to place the udpinp lock
> before the in_multi_mtx in the lock order, and let me know which path
> resulted in the opposite order from this one?

I hard-coded the correct order, but am now unable to reproduce the
problem.  I guess Murphy's Law at work.  I suspect you're right about
IGMP's packet getting back into ip_input.

I'll post another message if I can get it to happen again.

-ed



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