Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751235AbXBUMTM (ORCPT ); Wed, 21 Feb 2007 07:19:12 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751237AbXBUMTM (ORCPT ); Wed, 21 Feb 2007 07:19:12 -0500 Received: from nf-out-0910.google.com ([64.233.182.190]:22775 "EHLO nf-out-0910.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751235AbXBUMTK (ORCPT ); Wed, 21 Feb 2007 07:19:10 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:user-agent:mime-version:to:cc:subject:references:in-reply-to:x-enigmail-version:content-type:content-transfer-encoding:from; b=fCzQmsmy9IuIL3Ke+yP4qAasGV0t8u7qU8WUhsIdrg98+SnsSLHE1T2cieFmfHmN7sMfBez1laiMiU5RVoMt2rV81FLNFMY+Uk+fYJIbKgiQy22rEJDyuKGPeueyjt2IFOz2+hFIvk7QHgZ0Dmo/KkSo2lVgB882/gQlejE+2uI= Message-ID: <45DC38B2.1000208@googlemail.com> Date: Wed, 21 Feb 2007 13:18:58 +0100 User-Agent: Thunderbird 1.5.0.9 (X11/20070212) MIME-Version: 1.0 To: Michal Piotrowski CC: Alex Riesen , Thomas Gleixner , Ingo Molnar , LKML , Andrew Morton Subject: Re: 2.6.20-git13 kernel BUG at /mnt/md0/devel/linux-git/kernel/time/tick-sched.c:168 References: <45D61632.1020105@googlemail.com> <1171660939.30834.102.camel@localhost.localdomain> <20070217144752.GA2503@steel.home> <1171725257.30834.120.camel@localhost.localdomain> <20070217164652.GA2579@steel.home> <6bffcb0e0702171441i6ac69ac0yb1c46dbf8f43dc2e@mail.gmail.com> In-Reply-To: <6bffcb0e0702171441i6ac69ac0yb1c46dbf8f43dc2e@mail.gmail.com> X-Enigmail-Version: 0.94.1.1 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Michal Piotrowski Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5137 Lines: 113 Michal Piotrowski napisał(a): > On 17/02/07, Alex Riesen wrote: >> Thomas Gleixner, Sat, Feb 17, 2007 16:14:17 +0100: >> > On Sat, 2007-02-17 at 15:47 +0100, Alex Riesen wrote: >> > > > > 164 if (need_resched()) >> > > > > 165 goto end; >> > > > > 166 >> > > > > 167 cpu = smp_processor_id(); >> > > > > 168 BUG_ON(local_softirq_pending()); >> > > > >> > > > Hmm, the BUG_ON is inside of an interrupt disabled region, so we >> should >> > > > have bailed out early in the need_resched() check above (because >> we are >> > > > in the idle task context according to the stack trace). >> > > > >> > > > Is this reproducible ? >> > > >> > > Seen this too (Ubuntu, P4/ht-SMT, SATA, typed from screen): >> > >> > Can you please apply the patch below, so we can at least see, which >> > softirq is pending. This should trigger independently of hrtimers and >> > dynticks. You can keep it compiled in and disable it at the kernel >> > commandline with "nohz=off" and / or "highres=off" >> >> It did, only one time: >> >> Idle: local softirq pending: 0020<6>USB Universal Host Controller >> Interface driver v3.0 >> > > sudo cat /var/log/messages | grep Idle > Feb 17 17:35:34 bitis-gabonica kernel: Idle: local softirq pending: > 0020<6>hdd: ATAPI 48X DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache, > UDMA(33) > Feb 17 19:20:01 bitis-gabonica kernel: Idle: local softirq pending: > 0020<3>Idle: local softirq pending: 0020<3>Idle: local softirq > pending: 0020<7>PM: Removing info for No Bus:vcs7 > > cat /proc/interrupts > CPU0 CPU1 > 0: 232838 0 IO-APIC-edge timer > 1: 401 0 IO-APIC-edge i8042 > 7: 0 0 IO-APIC-edge parport0 > 8: 1 0 IO-APIC-edge rtc > 9: 1 0 IO-APIC-fasteoi acpi > 12: 4 0 IO-APIC-edge i8042 > 14: 319 0 IO-APIC-edge ide0 > 15: 1612 0 IO-APIC-edge ide1 > 16: 16494 0 IO-APIC-fasteoi uhci_hcd:usb3, libata > 17: 4670 0 IO-APIC-fasteoi uhci_hcd:usb1, uhci_hcd:usb4 > 18: 0 0 IO-APIC-fasteoi uhci_hcd:usb2 > 19: 2 0 IO-APIC-fasteoi ehci_hcd:usb5 > 20: 2822 0 IO-APIC-fasteoi Intel ICH5 > 21: 2881 0 IO-APIC-fasteoi eth1 > 22: 58 0 IO-APIC-fasteoi eth0 > NMI: 0 0 > LOC: 232562 232846 > ERR: 0 > MIS: 0 > > I can confirm that this is ICH5 SATA controller problem. Here is something interesting cat /var/log/messages | tail -n 300 | grep NOHZ Feb 20 20:09:39 bitis-gabonica kernel: NOHZ: local_softirq_pending 20 Feb 20 20:09:39 bitis-gabonica kernel: NOHZ: local_softirq_pending 20 Feb 20 21:10:01 bitis-gabonica kernel: NOHZ: local_softirq_pending 20 Feb 20 23:20:01 bitis-gabonica kernel: NOHZ: local_softirq_pending 20 Feb 21 05:10:28 bitis-gabonica kernel: NOHZ: local_softirq_pending 02 Feb 21 05:10:46 bitis-gabonica kernel: NOHZ: local_softirq_pending 02 ^^^^^^^^^ Feb 21 05:10:57 bitis-gabonica kernel: NOHZ: local_softirq_pending 20 Feb 21 05:11:48 bitis-gabonica kernel: NOHZ: local_softirq_pending 02 Feb 21 05:12:02 bitis-gabonica kernel: NOHZ: local_softirq_pending 20 Feb 21 05:12:02 bitis-gabonica kernel: NOHZ: local_softirq_pending 20 Feb 21 05:12:23 bitis-gabonica kernel: NOHZ: local_softirq_pending 02 Feb 21 05:12:29 bitis-gabonica kernel: NOHZ: local_softirq_pending 20 Feb 21 05:13:27 bitis-gabonica kernel: NOHZ: local_softirq_pending 20 Feb 21 05:13:49 bitis-gabonica kernel: NOHZ: local_softirq_pending 02 Feb 21 05:13:54 bitis-gabonica kernel: NOHZ: local_softirq_pending 20 Feb 21 05:14:48 bitis-gabonica kernel: NOHZ: local_softirq_pending 02 Feb 21 05:15:11 bitis-gabonica kernel: NOHZ: local_softirq_pending 20 Feb 21 05:15:13 bitis-gabonica kernel: NOHZ: local_softirq_pending 20 Feb 21 05:15:16 bitis-gabonica kernel: NOHZ: local_softirq_pending 02 Feb 21 05:16:18 bitis-gabonica kernel: NOHZ: local_softirq_pending 20 Feb 21 05:16:31 bitis-gabonica kernel: NOHZ: local_softirq_pending 02 Feb 21 05:17:03 bitis-gabonica kernel: NOHZ: local_softirq_pending 02 Feb 21 05:17:06 bitis-gabonica kernel: NOHZ: local_softirq_pending 20 Feb 21 05:17:09 bitis-gabonica kernel: NOHZ: local_softirq_pending 20 Feb 21 05:17:12 bitis-gabonica kernel: NOHZ: local_softirq_pending 02 Feb 21 05:17:17 bitis-gabonica kernel: NOHZ: local_softirq_pending 20 Feb 21 05:17:18 bitis-gabonica kernel: NOHZ: local_softirq_pending 02 ^^^^^^^^ 23 times in 7 minutes. Regards, Michal -- Michal K. K. Piotrowski LTG - Linux Testers Group (PL) (http://www.stardust.webpages.pl/ltg/) LTG - Linux Testers Group (EN) (http://www.stardust.webpages.pl/linux_testers_group_en/) - 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/