From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758157Ab1FIN6A (ORCPT ); Thu, 9 Jun 2011 09:58:00 -0400 Received: from adelie.canonical.com ([91.189.90.139]:48859 "EHLO adelie.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758138Ab1FIN56 (ORCPT ); Thu, 9 Jun 2011 09:57:58 -0400 Date: Thu, 9 Jun 2011 14:57:51 +0100 From: Andy Whitcroft To: Andrew Morton Cc: NeilBrown , Miklos Szeredi , viro@ZenIV.linux.org.uk, torvalds@linux-foundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, nbd@openwrt.org, hramrach@centrum.cz, jordipujolp@gmail.com, ezk@fsl.cs.sunysb.edu, mszeredi@suse.cz Subject: Re: [PATCH 0/7] overlay filesystem: request for inclusion Message-ID: <20110609135751.GE13242@shadowen.org> References: <1306932380-10280-1-git-send-email-miklos@szeredi.hu> <20110608153208.dc705cda.akpm@linux-foundation.org> <20110609115934.3c53f78f@notabene.brown> <20110608205233.ebfedc4d.akpm@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110608205233.ebfedc4d.akpm@linux-foundation.org> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 08, 2011 at 08:52:33PM -0700, Andrew Morton wrote: > Another issue: there have been numerous attempts at Linux overlay > filesystems from numerous parties. Does (or will) this implementation > satisfy all their requirements? > > Because if not, we're in a situation where the in-kernel code is > unfixably inadequate so we end up merging another similar-looking > thing, or the presence of this driver makes it harder for them to get > other drivers merged and the other parties' requirements remain > unsatisfied. >>From what I have seen the main advantage of the overlayfs implementation is its simplicity. It allows you to layer exactly two things. That said, in testing overlayfs seems perfectly happy to take its own mounts and further union them providing the flexibility that other union mounts implmentations provide. -apw