The following reply was made to PR kern/34882; it has been noted by GNATS.

From: "Julio M. Merino Vidal" <jmmv84@gmail.com>
To: tech-kern <tech-kern@netbsd.org>, gnats-bugs@NetBSD.org
Cc: 
Subject: Re: Use vn_rdwr in vnd (Re: kern/34882)
Date: Fri, 10 Nov 2006 00:05:34 +0100

 On 11/9/06, David Laight <david@l8s.co.uk> wrote:
 > On Tue, Nov 07, 2006 at 02:57:06PM +0100, Julio M. Merino Vidal wrote:
 > >
 > > The attached patch makes vnd use the regular VOP_READ and VOP_WRITE
 > > operations iff bmap/strategy are _not_ available
 >
 > Would that let it work with sparse files ?
 
 I think it would, but I haven't tested.
 
 > If so a mount option might be useful.
 
 It should be a vnconfig option (dunno if that's what you wanted to
 say) because the setting is on the vnd device, not per-mount specific.
 
 -- 
 Julio M. Merino Vidal <jmmv84@gmail.com>
 The Julipedia - http://julipedia.blogspot.com/