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Date: Thu, 19 Apr 2012 07:24:17 -0400
From: Jim Rees <rees@umich.edu>
To: Harald Dunkel <harald.dunkel@aixigo.de>
Cc: linux-nfs@vger.kernel.org
Subject: Re: Howto temporarily disable delegation?
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Harald Dunkel wrote:

  Is there some way to temporarily disable file delegation
  on the NFSv4 server?

I think it's "echo 0 >/proc/sys/fs/leases-enable" and you have to do it
before you start the server.