From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?iso-8859-1?Q?J=F6rn?= Engel Subject: Re: [RFC] VFS: FS CoW using redirection Date: Sun, 27 Aug 2006 19:15:10 +0200 Message-ID: <20060827171510.GA3502@wohnheim.fh-wedel.de> References: <200607082041.54489.a1426z@gawab.com> <20060823172402.GC15851@wohnheim.fh-wedel.de> <20060823180552.GC28873@filer.fsl.cs.sunysb.edu> <200608262205.21397.a1426z@gawab.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Josef Sipek , Eric Van Hensbergen , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Return-path: Received: from wohnheim.fh-wedel.de ([213.39.233.138]:40916 "EHLO wohnheim.fh-wedel.de") by vger.kernel.org with ESMTP id S932188AbWH0RPV (ORCPT ); Sun, 27 Aug 2006 13:15:21 -0400 To: Al Boldi Content-Disposition: inline In-Reply-To: <200608262205.21397.a1426z@gawab.com> Sender: linux-fsdevel-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org On Sat, 26 August 2006 22:05:21 +0300, Al Boldi wrote: >=20 > So what was the rejecting theme? I don't believe there was one. Jan simply didn't push much, so noone was forced to resist him. And noone else needed union mount enough to push Jan. > > Or you can give Unionfs a try: http://www.unionfs.org >=20 > UnionFS is great, but it incurs additional overhead, as it lives belo= w the=20 > real VFS. What could be really great, is to move some basic function= ality=20 > abstractions from UnionFS into VFS proper. Welcome to Jan's work. :) If you want to make this vision happen, one of the missing pieces is a method for copyup, an in-kernel copying routine. Unionfs needs is just the same as Jan's patches do and in the past Linus didn't like my approach of using sendfile for it. You could take a stab at the splice code and see how that can be used for copyup. J=F6rn --=20 Write programs that do one thing and do it well. Write programs to work together. Write programs to handle text streams, because that is a universal interface. -- Doug MacIlroy - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel= " in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html