From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263600AbTL2P02 (ORCPT ); Mon, 29 Dec 2003 10:26:28 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263606AbTL2P02 (ORCPT ); Mon, 29 Dec 2003 10:26:28 -0500 Received: from imf17aec.mail.bellsouth.net ([205.152.59.65]:20613 "EHLO imf17aec.mail.bellsouth.net") by vger.kernel.org with ESMTP id S263600AbTL2P00 (ORCPT ); Mon, 29 Dec 2003 10:26:26 -0500 Subject: Re: 2.4.23 can run with HZ==0! From: Rob Love To: Frank van Maarseveen Cc: Arjan van de Ven , linux-kernel@vger.kernel.org In-Reply-To: <20031229125240.GA4055@janus> References: <20031228230522.GA1876@janus> <1072691126.5223.5.camel@laptop.fenrus.com> <20031229125240.GA4055@janus> Content-Type: text/plain Message-Id: <1072711585.4294.8.camel@fur> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.5 (1.4.5-8) Date: Mon, 29 Dec 2003 10:26:25 -0500 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2003-12-29 at 07:52, Frank van Maarseveen wrote: > Can you give me an example? Sure, as this has already been done: http://www.kernel.org/pub/linux/kernel/people/rml/variable-HZ/v2.4/ As you see, that has a ton of fixups, primarily to ensure that user-space is always exported jiffies in terms of USER_HZ==100. > The uptime will be rather limited with 32 bits jiffies ;-) but I can live with that. There is a patch at that same place that adds 64-bit jiffies. Rob Love