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Date:      Fri, 14 Mar 1997 16:37:18 +1100
From:      Bruce Evans <bde@zeta.org.au>
To:        bde@zeta.org.au, toor@dyson.iquest.net
Cc:        current@freebsd.org
Subject:   Re: union mounts seem to work
Message-ID:  <199703140537.QAA11761@godzilla.zeta.org.au>

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>> I had few problems building part of the tree using union mounts:
>> 
>It is probably close to working.  The VM object is NOT connected
>properly to the upper level filesystem however.  I am goint to hack
>on nullfs tonight to get the technique working.

Yes, unlink() of a file on a union fs reliably panics with a self-lock
in vn_object_terminate().  More interestingly, ^C sometimes causes a
pagefault for a bad pointer in the locking code.

Bruce



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