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From: Pete French <petefrench@ticketswitch.com>
Date: Mon, 19 Jan 2009 16:20:12 +0000
Cc: dougb@freebsd.org, freebsd-stable@freebsd.org, kometen@gmail.com
Subject: Re: Big problems with 7.1 locking up :-(
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> There are significant changes in UDP locking between 7.0 and 7.1, so it could
> be that we're looking at a regression there.  If you're able to reproduce this
> reliably, it might well be worth doing a little search-and-replace in
> udp_usrreq.c along the following lines:
>
>    INP_RLOCK_ASSERT -> INP_WLOCK_ASSERT
>    INP_RLOCK -> INP_WLOCK
>    INP_RUNLOCK -> INP_WUNLOCK

Given that the latest lockup (see other email) has lots of locks in the UDP
code, would you like me to try this next ? The kernel which has just locked
is one using Dimtry's patch from 

	http://www.freebsd.org/cgi/query-pr.cgi?pr=130652

I am not sure why that would give me different traces during the lockup
though. I was doing a lot more TCP traffic this time, but that shouldnt
interfere with UDP should it ?

-pete.