From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965116AbVHJOEp (ORCPT ); Wed, 10 Aug 2005 10:04:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965117AbVHJOEp (ORCPT ); Wed, 10 Aug 2005 10:04:45 -0400 Received: from e2.ny.us.ibm.com ([32.97.182.142]:45492 "EHLO e2.ny.us.ibm.com") by vger.kernel.org with ESMTP id S965116AbVHJOEo (ORCPT ); Wed, 10 Aug 2005 10:04:44 -0400 Date: Wed, 10 Aug 2005 19:35:28 +0530 From: Srivatsa Vaddagiri To: George Anzinger Cc: Con Kolivas , Adrian Bunk , linux-kernel@vger.kernel.org, ck@vds.kolivas.org, tony@atomide.com, tuukka.tikkanen@elektrobit.com, Andrew Morton Subject: Re: [PATCH] i386 No-Idle-Hz aka Dynamic-Ticks 5 Message-ID: <20050810140528.GA20893@in.ibm.com> Reply-To: vatsa@in.ibm.com References: <200508031559.24704.kernel@kolivas.org> <200508060239.41646.kernel@kolivas.org> <20050806174739.GU4029@stusta.de> <200508071512.22668.kernel@kolivas.org> <20050807165833.GA13918@in.ibm.com> <42F905DA.4070308@mvista.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <42F905DA.4070308@mvista.com> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 09, 2005 at 12:36:58PM -0700, George Anzinger wrote: > IMNOHO, this is the ONLY way to keep proper time. As soon as you > reprogram the PIT you have lost track of the time. George, Can't TSC (or equivalent) serve as a backup while PIT is disabled, especially considering that we disable PIT only for short duration in practice (few seconds maybe) _and_ that we don't have HRT support yet? -- Thanks and Regards, Srivatsa Vaddagiri, Linux Technology Center, IBM Software Labs, Bangalore, INDIA - 560017