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Date: Thu, 8 Jan 2004 23:07:03 +0100
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From: Florian Weimer <fw@deneb.enyo.de>
Subject: nullfs on 5.1
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I'm trying to use nullfs on FreeBSD 5.1, and run into deadlocks in quite
simple situations (chroot to tree that contains an alias mount, read
access to the mounted tree -- no recursive/loop mounts).  Processes get
stuck and hang forever in D state (holding a UFS log according to ps).

Is nullfs essentially unsuported, or is it just broken?  What's the
status of unionfs (the manpage is rather discouraging).