Message-Id: <200808210457.AA00214@capsicum.lab.ntt.co.jp>
From: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Date: Thu, 21 Aug 2008 13:57:23 +0900
To: Andi Kleen <andi@firstfloor.org>
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH RFC] nilfs2: continuous snapshotting file system
In-Reply-To: <87iqtwyq55.fsf@basil.nowhere.org>
References: <87iqtwyq55.fsf@basil.nowhere.org>
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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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