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Message-ID: <48EB8035.7030004@redhat.com>
Date:	Tue, 07 Oct 2008 10:28:53 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	Peter Kukol <pkukol@...gle.com>
CC:	Theodore Tso <tytso@....edu>, linux-ext4@...r.kernel.org,
	Michael Rubin <mrubin@...gle.com>,
	Frank Mayhar <fmayhar@...gle.com>
Subject: Re: No-journal option for ext4

Peter Kukol wrote:
> Thanks for the great suggestions - they all make perfect sense. I did
> see the "journal present" flag, BTW, but figured that it might be
> safer not to change existing behavior - e.g. when someone accidentally
> says ext4 instead of ext2 when mounting an ext2 volume, right now they
> get an error. If folks are OK with this changing to a successful
> mount, I'm happy - less code/work is good ;-).

As long as we've purged all kernelspace flag updates it's probably ok to
"accidentally" mount ext2 (or ext3) as ext4 - as long as it's really
easy to go back.  It'd be worth one more look though in the long run.

Early on I had some nasty surprises with ext4 "assimilating" my ext3
RHEL5 root disk :)

-Eric

> I'll rework my patch and send out an update when it's ready.
> 
> Thanks again!
> 
> PeterK
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