Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262931AbUC2MnD (ORCPT ); Mon, 29 Mar 2004 07:43:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262923AbUC2MmH (ORCPT ); Mon, 29 Mar 2004 07:42:07 -0500 Received: from mail.shareable.org ([81.29.64.88]:21139 "EHLO mail.shareable.org") by vger.kernel.org with ESMTP id S262909AbUC2Mkc (ORCPT ); Mon, 29 Mar 2004 07:40:32 -0500 Date: Mon, 29 Mar 2004 13:40:15 +0100 From: Jamie Lokier To: Pavel Machek Cc: "Eric W. Biederman" , =?iso-8859-1?Q?J=F6rn?= Engel , Davide Libenzi , "Patrick J. LoPresti" , Linux Kernel Mailing List Subject: Re: [PATCH] cowlinks v2 Message-ID: <20040329124015.GB4984@mail.shareable.org> References: <20040321181430.GB29440@wohnheim.fh-wedel.de> <20040325174942.GC11236@mail.shareable.org> <20040325194303.GE11236@mail.shareable.org> <20040327102828.GA21884@mail.shareable.org> <20040327214238.GA23893@mail.shareable.org> <20040329092835.GD1453@openzaurus.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040329092835.GD1453@openzaurus.ucw.cz> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 749 Lines: 18 Pavel Machek wrote: > Actually, there's 4th strategy, too. You could implement sharing at block level. > Block free bitmap would become bigger, but you could do some tricks to keep it > at ~8 bits per block... For sharing source trees and such, and even for COW overlays of /usr/lib and /usr/bin, that would have no benefit: you never write to just part of a source or object file. For databases (including things like the RPM database), and snapshots of filesystems, it would be more useful. -- Jamie - 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/