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Date: Sat, 10 Jun 2006 16:07:14 +0200
From: Olivier Galibert <galibert@pobox.com>
To: Theodore Tso <tytso@mit.edu>, Sven-Haegar Koch <haegar@sdinet.de>,
       Michael Poole <mdpoole@troilus.org>, Jeff Garzik <jeff@garzik.org>,
       Andrew Morton <akpm@osdl.org>, Christoph Hellwig <hch@infradead.org>,
       cmm@us.ibm.com, linux-kernel@vger.kernel.org,
       ext2-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org
Subject: Re: [RFC 0/13] extents and 48bit ext3
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	Theodore Tso <tytso@mit.edu>, Sven-Haegar Koch <haegar@sdinet.de>,
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On Fri, Jun 09, 2006 at 09:06:51PM -0400, Theodore Tso wrote:
> On Sat, Jun 10, 2006 at 02:49:32AM +0200, Sven-Haegar Koch wrote:
> > I see a different problem with "ext3 + extends is not ext3 anymore" when 
> > the feature goes mainstream:
> > - user with old distri, no extends in use, no kernel support for them
> > - user has some kind of problem
> > - uses new rescue disk (aka knoppix at the time of problem) - that then
> >   is current stuff, and certainly uses extents - fixes problem on disk
> >   (may be a simple as running lilo/grub from chroot, happens often for me)
> > - tries to boot back into his distri -> *boom* he lost
> 
> Incorrect, because unless you explicitly enable the use of extents,
> the mere act of using a new kernel such as might be found on knoppix
> will not result in the filesystem utilizing the extent feature.

And how shall the rescue/live CD know whether to use the feature?

  OG.