From owner-freebsd-hackers  Thu Dec 13  0: 2:11 2001
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Date: Thu, 13 Dec 2001 00:00:37 -0800 (PST)
From: Matthew Dillon <dillon@apollo.backplane.com>
Message-Id: <200112130800.fBD80bb55582@apollo.backplane.com>
To: David Greenman <dg@root.com>
Cc: Jordan Hubbard <jkh@winston.freebsd.org>,
	Peter Wemm <peter@wemm.org>, Mike Smith <msmith@FreeBSD.ORG>,
	hackers@FreeBSD.ORG, msmith@mass.dis.org
Subject: Re: Found NFS data corruption bug... (was Re: NFS: How to make FreeBSD fall on its face in one easy step )
References: <58885.1008217148@winston.freebsd.org> <200112130608.fBD689K49906@apollo.backplane.com> <20011212224927.A73226@nexus.root.com>
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:
:   Very cool. Good job!
:
:-DG
:
:David Greenman
:Co-founder, The FreeBSD Project - http://www.freebsd.org

    Thanks!  I'm slowly whacking the bugs.  I just fixed another one...
    vtruncbuf() handles the buffers beyond the file EOF but doesn't handle
    the buffer straddling the truncation point, so I had to augment the
    NFS client's truncation code to deal with that.  With that fixed the
    tester program got to 34483 operations before finding a problem.  
    Hopefully I'm in the home stretch now :-)

    What I really love about this program is that the problems are so
    repeatable.  So far the same failure occurs at exactly the same place,
    every time.  It makes it unbelievably easy to track the bugs down.

    I think I can make it perfect.  I'll post another patch tomorrow.

					-Matt
					Matthew Dillon 
					<dillon@backplane.com>

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