From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932318AbVHaLRZ (ORCPT ); Wed, 31 Aug 2005 07:17:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932396AbVHaLRZ (ORCPT ); Wed, 31 Aug 2005 07:17:25 -0400 Received: from e1.ny.us.ibm.com ([32.97.182.141]:145 "EHLO e1.ny.us.ibm.com") by vger.kernel.org with ESMTP id S932318AbVHaLRY (ORCPT ); Wed, 31 Aug 2005 07:17:24 -0400 Date: Wed, 31 Aug 2005 16:47:05 +0530 From: Srivatsa Vaddagiri To: Arjan van de Ven Cc: Tony Lindgren , Alistair John Strachan , Con Kolivas , "Theodore Ts'o" , Christopher Friesen , Lee Revell , linux-kernel , Thomas Renninger Subject: Re: Dynamic tick for 2.6.14 - what's the plan? Message-ID: <20050831111705.GC10307@in.ibm.com> Reply-To: vatsa@in.ibm.com References: <1125354385.4598.79.camel@mindpipe> <200508301348.59357.kernel@kolivas.org> <20050830123132.GH6055@atomide.com> <200508301701.49228.s0348365@sms.ed.ac.uk> <20050831074419.GA1029@atomide.com> <1125477566.3213.6.camel@laptopd505.fenrus.org> <20050831103402.GA6496@atomide.com> <1125486186.3213.8.camel@laptopd505.fenrus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1125486186.3213.8.camel@laptopd505.fenrus.org> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Aug 31, 2005 at 01:03:05PM +0200, Arjan van de Ven wrote: > that sounds like a fundamental issue that really needs to be fixed > first! It should be fixed by the patch here: http://marc.theaimsgroup.com/?l=linux-kernel&m=111556608901657&w=2 Tony, I don't see any slow bootups on x86 because of dyn-tick. If you still see them in your env, can you test with the patch above? Recovering time after sleep is the single biggest problem that I seem to have, even while using ACPI PM timer (forget TSC). Time can drift by couple of seconds after few hours. I have made some changes to the lost tick calculation in timer_pm.c after which it seems to be stable on some machines, but I cant repeat that on other (maybe newer) machines. Will post out all the changes I have pretty soon. -- Thanks and Regards, Srivatsa Vaddagiri, Linux Technology Center, IBM Software Labs, Bangalore, INDIA - 560017