From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759287AbXI1PIV (ORCPT ); Fri, 28 Sep 2007 11:08:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753992AbXI1PIN (ORCPT ); Fri, 28 Sep 2007 11:08:13 -0400 Received: from mx1.redhat.com ([66.187.233.31]:40058 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753790AbXI1PIM (ORCPT ); Fri, 28 Sep 2007 11:08:12 -0400 Message-ID: <46FD18A5.9020907@redhat.com> Date: Fri, 28 Sep 2007 11:07:17 -0400 From: Chuck Ebbert Organization: Red Hat User-Agent: Thunderbird 1.5.0.12 (X11/20070719) MIME-Version: 1.0 To: Thomas Gleixner CC: Linus Torvalds , "Rafael J. Wysocki" , Andi Kleen , Andrew Morton , LKML , Ingo Molnar Subject: Re: [REGRESSION from 2.6.23-rc8] References: <200709231257.12213.rjw@sisk.pl> <1190832665.23376.38.camel@chaos> <200709262149.54732.rjw@sisk.pl> <200709262300.28336.rjw@sisk.pl> <1190842476.23376.57.camel@chaos> <1190846101.23376.64.camel@chaos> In-Reply-To: <1190846101.23376.64.camel@chaos> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On 09/26/2007 06:35 PM, Thomas Gleixner wrote: > It's even worse than I thought on the first check: > > "noapictimer" on the command line of an SMP box prevents _ONLY_ the boot > CPU apic timer from being used. But the secondary CPU is still > unconditionally setting up the APIC timer and uses the non calibrated > variable calibration_result, which is of course 0, to setup the APIC > timer. Wreckage guaranteed. > Is this why I get 1000 spurious interrupts/second on IRQ7 when booting x86_64 with "noapic"?