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From: Jung-uk Kim <jkim@FreeBSD.org>
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Date: Fri, 5 Aug 2011 11:41:47 -0400
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Cc: Ian FREISLICH <ianf@clue.co.za>
Subject: Re: fdescfs mount causes hard lock
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On Friday 05 August 2011 04:33 am, Ian FREISLICH wrote:
> Hi
>
> Since CURRENT Aug 2, my machine has hardlocked at boot time on
> "Mounting local filesystems".  I traced it this morning to
>
> fdesc          /dev/fd         fdescfs         rw      0       0
>
> Not mounting this stopped the hardlock.  I added it because one
> installed port requeried it, but I can't remember which port that
> was.
>
> Is this related to the panic recently reported by David Wolfskill?

Yes, reverting r224614 fixed the hang for me.  Alternatively, please 
try the last patch posted in the thread.

Jung-uk Kim