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Date: 28 Jul 2001 16:37:00 +0200
From: kaih@khms.westfalen.de (Kai Henningsen)
To: linux-kernel@vger.kernel.org
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In-Reply-To: <E15QF5E-0006ZL-00@the-village.bc.nu>
Subject: Re: Strange remount behaviour with ext3-2.4-0.9.4
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alan@lxorguk.ukuu.org.uk (Alan Cox)  wrote on 27.07.01 in <E15QF5E-0006ZL-00@the-village.bc.nu>:

> > more-or-less need need a tree-based fs and reference counting for all
> > the magic bits).  In fact, doing it as the fs layer means you could
> > have r/w snapshots with COW semantics.
>
> You dont want r/w snapshots for archiving.

Not for archiving, but when you want to run something and then throw it  
away again, for example. You could do that by just holding onto a ro  
snapshot and then replacing the rw tree with it later, but by having two  
rw trees you don't need to stop your regular operations.

For this to really be useful, you'd want it as an inheritable per-process  
thing, similar to aviro's namespace thing.

MfG Kai
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