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From: John Baldwin <jhb@freebsd.org>
To: freebsd-stable@freebsd.org
Subject: Re: locks under printf(9) and WITNESS = panic?
Date: Thu, 11 Jul 2013 16:21:41 -0400
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 (bigwig.baldwin.cx); Thu, 11 Jul 2013 17:37:42 -0400 (EDT)
Cc: stable@freebsd.org, Steven Hartland <steven@multiplay.co.uk>
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On Saturday, June 29, 2013 9:19:24 pm Steven Hartland wrote:
> when booting stable/9 under a debug kernel with WITNESS
> enabled and verbose I get the following panic..
> 
> It seems very much like the discussion from a year back on
> current: http://lists.freebsd.org/pipermail/freebsd-current/2012-
January/031375.html
> 
> Any ideas?

Yeah, that lock needs to be MTX_RECURSE (the cnputs_mtx).  However, it
only recurses under witness.  *sigh*

-- 
John Baldwin