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From: Andriy Gapon <avg@FreeBSD.org>
Subject: Re: kern/172952: 9.1 hangs on reboot after all buffers synced
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The following reply was made to PR kern/172952; it has been noted by GNATS.

From: Andriy Gapon <avg@FreeBSD.org>
To: Travis Mikalson <bofh@terranova.net>
Cc: bug-followup@FreeBSD.org
Subject: Re: kern/172952: 9.1 hangs on reboot after all buffers synced
Date: Tue, 23 Oct 2012 22:43:27 +0300

 on 23/10/2012 11:05 Travis Mikalson said the following:
 > Andriy Gapon wrote:
 >> on 22/10/2012 13:18 Travis Mikalson said the following:
 >>> Screen shot of issue: http://tog.net/reboothang-freebsd91.jpg
 >>
 >> Is there any additional useful information if you set sysctl debug.bootverbose=1
 >> before reboot?
 > 
 > I'm afraid not. There is actually zero additional verbosity in the
 > shutdown kernel messages after setting sysctl debug.bootverbose=1.
 > 
 > I increased all other forms of additional verbosity and absolutely
 > nothing additional is shown during shutdown, sorry.
 > 
 
 Do you have DDB in your kernel?  Are you able to break to it using the keyboard
 combination?
 If yes, could you please execute 'ps' command in DDB and somehow capture its output?
 
 Also,
 http://people.freebsd.org/~jhb/papers/bsdcan/2008/article/node3.html
 http://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug-online-ddb.html
 -- 
 Andriy Gapon