Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761722AbXK2Kfu (ORCPT ); Thu, 29 Nov 2007 05:35:50 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752648AbXK2Kfl (ORCPT ); Thu, 29 Nov 2007 05:35:41 -0500 Received: from mx3.mail.elte.hu ([157.181.1.138]:42472 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752171AbXK2Kfk (ORCPT ); Thu, 29 Nov 2007 05:35:40 -0500 Date: Thu, 29 Nov 2007 11:35:11 +0100 From: Ingo Molnar To: Stefano Brivio Cc: "Rafael J. Wysocki" , linux-kernel@vger.kernel.org, Michael Buesch , Thomas Gleixner , Andrew Morton , Len Brown , Dave Jones Subject: Re: [BUG] jiffies counter leaps in 2.6.24-rc3 Message-ID: <20071129103511.GD10577@elte.hu> References: <20071124175112.58193424@morte> <200711241948.58881.rjw@sisk.pl> <20071124194635.58f5a44b@morte> <200711242031.26134.rjw@sisk.pl> <20071129095034.24b3fc59@morte> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20071129095034.24b3fc59@morte> User-Agent: Mutt/1.5.17 (2007-11-01) 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=3.1.7-deb -1.5 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 Content-Length: 1643 Lines: 48 * Stefano Brivio wrote: > Ok, I found out how to reliably reproduce this bug. The root session issue > was a bit weird, but I noticed I usually switch to root only when I need to > change the CPU frequency. And here's what happens: > > # cpuspeedy min > [after some time...] > Nov 29 09:42:31 morte [ 4408.722597] b43-phy0 ERROR: PHY transmission error > > # cpuspeedy max > Nov 29 09:42:41 morte [ 1177.238599] wmaster0: STA 00:14:c1:35:8d:eb Average rate: 540 (2160/4) > > It looks like jiffies get scaled exactly by a 3.75 factor, which is > / here. I use acpi-cpufreq and this is my > (only) CPU: > processor : 0 > vendor_id : GenuineIntel > cpu family : 6 > model : 13 > model name : Intel(R) Pentium(R) M processor 1.50GHz > stepping : 6 > cpu MHz : 1500.000 > cache size : 2048 KB > fdiv_bug : no > hlt_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 2 > wp : yes > flags : fpu vme de pse tsc msr mce cx8 sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss tm pbe bts est tm2 > bogomips : 2993.49 > clflush size : 64 > > Any hint? ah, the cpufreq/acpi/acpi-cpufreq angle is indeed a big clue. I've Cc:-ed various interested parties. Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/