From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 0/7] overlay filesystem: request for inclusion
Date: Wed, 8 Jun 2011 15:32:08 -0700
Message-ID: <20110608153208.dc705cda.akpm@linux-foundation.org>
References: <1306932380-10280-1-git-send-email-miklos@szeredi.hu>
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Cc: viro@ZenIV.linux.org.uk, torvalds@linux-foundation.org,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
	apw@canonical.com, nbd@openwrt.org, neilb@suse.de,
	hramrach@centrum.cz, jordipujolp@gmail.com, ezk@fsl.cs.sunysb.edu,
	mszeredi@suse.cz
To: Miklos Szeredi <miklos@szeredi.hu>
Return-path: <linux-fsdevel-owner@vger.kernel.org>
Received: from smtp1.linux-foundation.org ([140.211.169.13]:54384 "EHLO
	smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK)
	by vger.kernel.org with ESMTP id S1751895Ab1FHWdC (ORCPT
	<rfc822;linux-fsdevel@vger.kernel.org>);
	Wed, 8 Jun 2011 18:33:02 -0400
In-Reply-To: <1306932380-10280-1-git-send-email-miklos@szeredi.hu>
Sender: linux-fsdevel-owner@vger.kernel.org
List-ID: <linux-fsdevel.vger.kernel.org>

On Wed,  1 Jun 2011 14:46:13 +0200
Miklos Szeredi <miklos@szeredi.hu> wrote:

> I'd like to ask for overlayfs to be merged into 3.1.

Dumb questions:

I've never really understood the need for fs overlaying.  Who wants it?
What are the use-cases?

This sort of thing could be implemented in userspace and wired up via
fuse, I assume.  Has that been attempted and why is it inadequate?