From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757802AbXI1PK2 (ORCPT ); Fri, 28 Sep 2007 11:10:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752477AbXI1PKU (ORCPT ); Fri, 28 Sep 2007 11:10:20 -0400 Received: from www.osadl.org ([213.239.205.134]:51073 "EHLO mail.tglx.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752188AbXI1PKT (ORCPT ); Fri, 28 Sep 2007 11:10:19 -0400 Subject: Re: [REGRESSION from 2.6.23-rc8] From: Thomas Gleixner To: Chuck Ebbert Cc: Linus Torvalds , "Rafael J. Wysocki" , Andi Kleen , Andrew Morton , LKML , Ingo Molnar In-Reply-To: <46FD18A5.9020907@redhat.com> 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> <46FD18A5.9020907@redhat.com> Content-Type: text/plain Date: Fri, 28 Sep 2007 17:10:16 +0200 Message-Id: <1190992216.18681.42.camel@chaos> Mime-Version: 1.0 X-Mailer: Evolution 2.12.0 (2.12.0-3.fc8) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2007-09-28 at 11:07 -0400, Chuck Ebbert wrote: > 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"? No, thats a different problem. The wreckage is a stuck local apic timer interrupt. tglx