From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752187AbWCCIZE (ORCPT ); Fri, 3 Mar 2006 03:25:04 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752185AbWCCIZD (ORCPT ); Fri, 3 Mar 2006 03:25:03 -0500 Received: from fmmailgate04.web.de ([217.72.192.242]:54717 "EHLO fmmailgate04.web.de") by vger.kernel.org with ESMTP id S1752177AbWCCIZB (ORCPT ); Fri, 3 Mar 2006 03:25:01 -0500 Message-ID: <043101c63e9c$86e9d710$0200000a@aldipc> From: "roland" To: Subject: is there a COW inside the kernel ? Date: Fri, 3 Mar 2006 09:29:02 +0100 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org hello ! is there an equivalent of something like cowloop ( http://www.atconsultancy.nl/cowloop/total.html ) or md based cow device ( http://www.cl.cam.ac.uk/users/br260/doc/report.pdf ), i.e. a feature called "Copy On Write Blockdevice" inside the current or the near-future mainline kernel (besides UserModeLinux Arch)? i'm not sure - i think i remember having read that something like this can be probably done , but i don`t remember anymore what it was. i would find this useful for several purpose, but i don`t want to patch my system with 3rd party drivers or "non-standard" stuff - or even recompile the kernel. can someone help out with some information ? TIA roland k. system engineer