kern/166851: Copying directory from the mounted UFS disk image hangs in DL+ vnread state (source and destination both on the same ZFS)

[Yuri]

The following reply was made to PR kern/166851; it has been noted by GNATS.

From: Yuri <yuri at rawbw.com>
To: bug-followup at FreeBSD.org
Cc:  
Subject: RE: kern/166851: Copying directory from the mounted UFS disk image
 hangs in DL+ vnread state (source and destination both on the same ZFS)
Date: Wed, 11 Apr 2012 11:16:07 -0700

 I just was able to reproduce the same problem after reboot. Need to 
 reboot again now.
 
 Since both source (UFS image) of 'cp' and destination directory are on 
 the same ZFS disk, vnread was probably waiting for ZFS lock that was 
 somehow incurred by ongoing writing on the same disk.