Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964843AbWHWRYF (ORCPT ); Wed, 23 Aug 2006 13:24:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932457AbWHWRYF (ORCPT ); Wed, 23 Aug 2006 13:24:05 -0400 Received: from wohnheim.fh-wedel.de ([213.39.233.138]:15562 "EHLO wohnheim.fh-wedel.de") by vger.kernel.org with ESMTP id S932324AbWHWRYC (ORCPT ); Wed, 23 Aug 2006 13:24:02 -0400 Date: Wed, 23 Aug 2006 19:24:02 +0200 From: =?iso-8859-1?Q?J=F6rn?= Engel To: Al Boldi Cc: Eric Van Hensbergen , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC] VFS: FS CoW using redirection Message-ID: <20060823172402.GC15851@wohnheim.fh-wedel.de> References: <200607082041.54489.a1426z@gawab.com> <200607091550.36407.a1426z@gawab.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <200607091550.36407.a1426z@gawab.com> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 748 Lines: 22 On Sun, 9 July 2006 15:50:36 +0300, Al Boldi wrote: > > Consider something simple like this: > > VFS - anyFS1 (r/w) used normally, unless ENotFound, then redirect read to > \ anyFS2, or CoW from anyFS2 to anyFS1. > anyFS2 (r/o) used normally. That concept is known as union mount. Jan Blunck did some patches in that direction, you might be able to find them in the archives. If not, just send him a mail. J?rn -- ...one more straw can't possibly matter... -- Kirby Bakken - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/