linux-kernel - Re: [PATCH RFC] nilfs2: continuous snapshotting file system

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Message-Id: <200808210457.AA00214@capsicum.lab.ntt.co.jp>
Date:	Thu, 21 Aug 2008 13:57:23 +0900
From:	Ryusuke Konishi <konishi.ryusuke@....ntt.co.jp>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC] nilfs2: continuous snapshotting file system

On Wed, 20 Aug 2008 11:47:18 +0200 Andi Kleen wrote:
>> It has many TODO items:
>
>How stable is the on-disk format?

It's almost stable.
Hopefully I don't want to make any major change on the on-disk
format which affects the compatibility.

Some unsupported features like atime, EA, and ACLs should be
carefully confirmed before merging to the mainline though
I believe they don't lead to the major change.

>If the file system makes mainline
>your user base would likely increase significantly. Users then tend
>to have a reasonable exception that they can still mount old file systems
>later on newer kernels (although not necessarily the other way round)

Yes I know.  Thank you for the important advice.
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