From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753140AbXF3TJM (ORCPT ); Sat, 30 Jun 2007 15:09:12 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751210AbXF3TI6 (ORCPT ); Sat, 30 Jun 2007 15:08:58 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:54733 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751073AbXF3TI6 (ORCPT ); Sat, 30 Jun 2007 15:08:58 -0400 Date: Sat, 30 Jun 2007 21:08:45 +0200 From: Ingo Molnar To: Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= , Thomas Gleixner , linux-kernel@vger.kernel.org Subject: Re: Dynamic ticks make system jerking Message-ID: <20070630190844.GA1775@elte.hu> References: <20070626150015.GA20233@informatik.uni-freiburg.de> <1182872749.11854.27.camel@chaos> <20070627163529.GA12978@informatik.uni-freiburg.de> <20070629223303.GA26926@informatik.uni-freiburg.de> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20070629223303.GA26926@informatik.uni-freiburg.de> User-Agent: Mutt/1.5.14 (2007-02-12) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.1.7 -1.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Uwe Kleine-König wrote: > I found the problem, it had only indirectly to do with nohz. I didn't > acknowledge the serial interrupt but as the timer and the serial need > the same acknowledgement the serial irq got his ack always when the > timer triggerd. Up to now that delay didn't stick out as the delay > was < 10ms. yeah, that makes sense. Now you've probably got a better serial driver as a side-effect :-) Ingo