From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 11 May 2001 03:05:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 11 May 2001 03:05:35 -0400 Received: from cisco7500-mainGW.gts.cz ([194.213.32.131]:3332 "EHLO bug.ucw.cz") by vger.kernel.org with ESMTP id ; Fri, 11 May 2001 03:05:18 -0400 Date: Mon, 7 May 2001 19:04:39 +0000 From: Pavel Machek To: Keith Owens Cc: Kai Henningsen , linux-kernel@vger.kernel.org Subject: Re: X15 alpha release: as fast as TUX but in user space (fwd) Message-ID: <20010507190437.B45@(none)> In-Reply-To: <80BTbB7Hw-B@khms.westfalen.de> <13656.988875876@kao2.melbourne.sgi.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0.1i In-Reply-To: <13656.988875876@kao2.melbourne.sgi.com>; from kaos@ocs.com.au on Thu, May 03, 2001 at 05:44:36PM +1000 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi! > On 03 May 2001 09:13:00 +0200, > kaih@khms.westfalen.de (Kai Henningsen) wrote: > >pavel@suse.cz (Pavel Machek) wrote on 30.04.01 in <20010430104231.C3294@bug.ucw.cz>: > > > >> PS: Hmm, how do you do timewarp for just one userland appliation with > >> this installed? > > > >1. What on earth for? > > Y10K testing :) > > >2. How do you do it today, and why wouldn't that work? > > LD_PRELOAD on a library that overrides gettimeofday(). I can see no > reason why that would not continue to work. What would stop working > are timewarp modules that intercepted the syscall at the kernel level > instead of user space level. ...and would break ptrace too. -- Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt, details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.