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To: Jeff Roberson <jroberson@jroberson.net>
Date: Sat, 12 Apr 2008 10:03:28 -0700
From: Kirk McKusick <mckusick@mckusick.com>
Cc: arch@freebsd.org
Subject: Re: VOP_LEASE 
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> Date: Sat, 12 Apr 2008 02:13:15 -1000 (HST)
> From: Jeff Roberson <jroberson@jroberson.net>
> To: arch@freebsd.org
> Subject: VOP_LEASE
> 
> As far as I can tell this has never been used.  Unless someone can show me 
> otherwise I'm going to go ahead and remove it.
> 
> Thanks,
> Jeff

VOP_LEASE is used by NQNFS and NFSv4. It notifies them when a file
is modified locally so that they know to update any outstanding
leases (e.g., evict any write lease for the file and do callbacks
for any read leases for the file). Deleting VOP_LEASE would break
NFS big time.

	Kirk McKusick