From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764821AbXKUAWv (ORCPT ); Tue, 20 Nov 2007 19:22:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757866AbXKUAWo (ORCPT ); Tue, 20 Nov 2007 19:22:44 -0500 Received: from outpipe-village-512-1.bc.nu ([81.2.110.250]:36567 "EHLO the-village.bc.nu" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1757601AbXKUAWn (ORCPT ); Tue, 20 Nov 2007 19:22:43 -0500 Date: Wed, 21 Nov 2007 00:20:46 +0000 From: Alan Cox To: Helge Deller Cc: linux-kernel@vger.kernel.org Subject: Re: [PATCH] Time-based RFC 4122 UUID generator Message-ID: <20071121002046.2f95aac9@the-village.bc.nu> In-Reply-To: References: X-Mailer: Claws Mail 2.10.0 (GTK+ 2.10.14; i386-redhat-linux-gnu) Organization: Red Hat UK Cyf., Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, Y Deyrnas Gyfunol. Cofrestrwyd yng Nghymru a Lloegr o'r rhif cofrestru 3798903 Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 20 Nov 2007 23:58:38 +0100 Helge Deller wrote: > David Schwartz wrote: > > Any UUID generator that can produce duplicate UUIDs with probability > > significantly less than purely random UUIDs is so badly broken that it > > should not ever be used. Anyone who finds such a UUID generator should > > immediately either fix it or throw it on the junk heap. > > That's what my patch is about: Solve the problem at it's root. Time based is not neccessarily random, but the kernel one is also clearly not random either. Alan