Subject: Re: kern/1265: Bizarre bug in NFS/mmap code
To: Chris G Demetriou <Chris_G_Demetriou@BALVENIE.PDL.CS.CMU.EDU>
From: David Brownlee <>
List: current-users
Date: 07/25/1995 12:22:34
On Mon, 24 Jul 1995, Chris G Demetriou wrote:

> > >Description:
> > 	I have a file NFS mounted from a SunOS 4.1.3u1 fileserver onto various
> > 	machines. One of which is a sun4 running NetBSD -current (muon)
> > 	It used to be       "abs culf dp myth norm nostra socrates tjfas tugs"
> > 	It was changed to   "abs culf dp myth norm nostra tjfas tugs"
> > 	'cat' on muon gives "abs culf dp myth norm nostra tjfas tugs"
> > 	'vi' on muon gives  "abs culf dp myth norm nostra socrates tj"
> > 
> > 	vi, cat, more, (other editor), on various other machines give the
> > 	correct result.
> this is a mmap vs. buffer cache problem.
> you'll note that the new file's length is correct (don't forget that
> trailing newline, which vi will add if there's not one in the
> file...), but that the data is correct.
	I guessed it was something like that :)
> the solution: merge the vm system and buffer cache.  weekend project,
> eh?  8-)
	Hmm - my weekends don't come in that shape :)
	Haven't the freebsd team already done this?
	Is anybody working on this for netbsd, and/or is it possible to
	take the work already done by the freebsd people?

		David (MIME) +44 171 477 8186  {post,host}master  (abs)
Network Analyst, UCS, City University, Northampton Square, London EC1V 0HB.
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