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From: Adrenalin <adrenalinup@gmail.com>
Date: Mon, 22 Mar 2010 19:26:47 +0100
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To: Rick Macklem <rmacklem@uoguelph.ca>
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Cc: freebsd-current@freebsd.org, current@freebsd.org
Subject: Re: hang in rpccon from interrupting NFS operations (Re: pointyhat 
	panic)
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That's strange, after recompiling the lastest 8_0 that contain the patch (
http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/rpc/clnt_vc.c.diff?r1=1.8.2.2.2.1;r2=1.8.2.2.2.2)
after 5 days it stuck again with same symptoms, I've also got some in the
nfs state:

FreeBSD .. 8.0-RELEASE-p2 FreeBSD 8.0-RELEASE-p2 #0: Tue Mar 16 22:56:51 EET
2010     ..@..:/usr/obj/usr/src/sys/MYGEN  amd64

When attaching the debugger for an rpccon process, It stuck in here
#0  0x000000080124051c in stat () from /lib/libc.so.7

http://img705.imageshack.us/img705/741/10032219218.png

Can I do the online debug of the kernel, or how can I can help you to solve
the problem ?