From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757800AbYFEPER (ORCPT ); Thu, 5 Jun 2008 11:04:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753247AbYFEPEF (ORCPT ); Thu, 5 Jun 2008 11:04:05 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:44528 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753223AbYFEPEE (ORCPT ); Thu, 5 Jun 2008 11:04:04 -0400 Date: Thu, 5 Jun 2008 17:03:27 +0200 From: Ingo Molnar To: "Maciej W. Rozycki" Cc: Thomas Gleixner , "H. Peter Anvin" , linux-kernel@vger.kernel.org, the arch/x86 maintainers Subject: Re: [PATCH 8/8] x86: I/O APIC: Timer through 8259A second-chance Message-ID: <20080605150327.GA22128@elte.hu> References: <20080531101832.GA15170@elte.hu> <20080605091949.GA2307@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Maciej W. Rozycki wrote: > It seems wrong to me to set timer_through_8259 in apic_{32,64}.c -- > can I get .config for this setup as well as the bootstrap log? Why is > the 8259A needed here to supply the timer interrupt? It shouldn't be > needed except as arranged in check_timer() -- elsewhere the > corresponding I/O APIC input is not set up correctly. > > Note I have chosen the default value of timer_through_8259 > deliberately to trigger dodgy cases like this ;) so that they can be > investigated. find them here: http://redhat.com/~mingo/misc/config-Thu_Jun__5_16_40_50_CEST_2008.bad http://redhat.com/~mingo/misc/log-Thu_Jun__5_16_40_50_CEST_2008.bad NOTE: you need to copy out and use the boot parameters from the boot log: [ 0.000000] Command line: root=/dev/sda6 console=ttyS0,115200 earlyprintk=se rial,ttyS0,115200 debug initcall_debug apic=verbose sysrq_always_enabled ignore _loglevel selinux=0 nmi_watchdog=1 profile=0 maxcpus=1 nosmp no_hz=off highres =0 noapic nolapic_timer hpet=disable idle=mwait as -tip testing occasionally randomizes boot parameters too. (to find regressions like this) Let me know if you cannot reproduce this. Ingo