From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756906AbXKYVnR (ORCPT ); Sun, 25 Nov 2007 16:43:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753186AbXKYVnB (ORCPT ); Sun, 25 Nov 2007 16:43:01 -0500 Received: from www.tglx.de ([62.245.132.106]:37578 "EHLO www.tglx.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754773AbXKYVnA (ORCPT ); Sun, 25 Nov 2007 16:43:00 -0500 Date: Sun, 25 Nov 2007 22:42:28 +0100 (CET) From: Thomas Gleixner To: Pavel Machek cc: Ingo Molnar , kernel list Subject: Re: [patch] Re: nohz and strange sleep latencies In-Reply-To: <20071125202557.GB7739@elf.ucw.cz> Message-ID: References: <20071119203152.GA1772@elf.ucw.cz> <20071119205555.GA28696@elte.hu> <20071119211142.GA1857@elf.ucw.cz> <20071120085704.GA19950@elte.hu> <20071120105458.GA1597@elf.ucw.cz> <20071120205454.GD10008@elte.hu> <20071120225246.GA24380@elte.hu> <20071122185238.GA1821@elf.ucw.cz> <20071125202557.GB7739@elf.ucw.cz> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 25 Nov 2007, Pavel Machek wrote: > Hi! > > Okay, so the problem seems to be we are using unreliable lapic > timer... which is stopped in C3 (and in C2 on broken machines). > > I do not see any mechanism to disable lapic; there seems to be some > mechanism to work around stopped lapic timer is used (in > acpi/processor_idle.c) but it does not seem to work. So what about > this? nolapic_timer on 32bit noapictimer on 64bit Sigh, I know that sucks, but it's the history of the diverged trees. tglx