From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263128AbVGNTnf (ORCPT ); Thu, 14 Jul 2005 15:43:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263121AbVGNTn3 (ORCPT ); Thu, 14 Jul 2005 15:43:29 -0400 Received: from e33.co.us.ibm.com ([32.97.110.131]:29583 "EHLO e33.co.us.ibm.com") by vger.kernel.org with ESMTP id S263115AbVGNTmK (ORCPT ); Thu, 14 Jul 2005 15:42:10 -0400 Subject: Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt From: john stultz To: Arjan van de Ven Cc: Linus Torvalds , Vojtech Pavlik , Lee Revell , dean gaudet , Chris Wedgwood , Andrew Morton , Len Brown , dtor_core@ameritech.net, david.lang@digitalinsight.com, davidsen@tmr.com, kernel@kolivas.org, lkml , mbligh@mbligh.org, diegocg@gmail.com, azarah@nosferatu.za.org, christoph@lameter.com In-Reply-To: <1121360561.3967.55.camel@laptopd505.fenrus.org> References: <1121286258.4435.98.camel@mindpipe> <20050713134857.354e697c.akpm@osdl.org> <20050713211650.GA12127@taniwha.stupidest.org> <20050714005106.GA16085@taniwha.stupidest.org> <1121304825.4435.126.camel@mindpipe> <1121326938.3967.12.camel@laptopd505.fenrus.org> <20050714121340.GA1072@ucw.cz> <1121360561.3967.55.camel@laptopd505.fenrus.org> Content-Type: text/plain Date: Thu, 14 Jul 2005 12:42:02 -0700 Message-Id: <1121370122.7673.161.camel@cog.beaverton.ibm.com> Mime-Version: 1.0 X-Mailer: Evolution 2.0.4 (2.0.4-4) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2005-07-14 at 19:02 +0200, Arjan van de Ven wrote: > On Thu, 2005-07-14 at 09:37 -0700, Linus Torvalds wrote: > > just doesn't realize that the latter is a bit more complicated exactly > > because the latter is a hell of a lot more POWERFUL. Trying to get rid of > > jiffies for some religious reason is _stupid_. > > I have nothing religious against jiffies per se. My argument however is > that with a few simple, relative interfaces *in addition* to an absolute > interface, almost all drivers suddenly are isolated from jiffies and HZ > because they simply don't care. Because they really DON'T care about > absolute time. At all. We'll I'd probably put it as: "they do care about absolute time, but they do not care about ticks or timer interrupt frequency" thanks -john