Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752019Ab3FDVUu (ORCPT ); Tue, 4 Jun 2013 17:20:50 -0400 Received: from cantor2.suse.de ([195.135.220.15]:50572 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751311Ab3FDVUs (ORCPT ); Tue, 4 Jun 2013 17:20:48 -0400 Date: Tue, 4 Jun 2013 23:20:42 +0200 (CEST) From: Jiri Kosina To: Borislav Petkov Cc: "Paul E. McKenney" , Frederic Weisbecker , Tony Luck , linux-kernel@vger.kernel.org, x86@kernel.org, Thomas Gleixner Subject: Re: NOHZ: WARNING: at arch/x86/kernel/smp.c:123 native_smp_send_reschedule, round 2 In-Reply-To: <20130517135641.GF23035@pd.tnic> Message-ID: References: <20130509125040.GF27333@pd.tnic> <20130509125859.GG27333@pd.tnic> <20130515184528.GO4442@linux.vnet.ibm.com> <20130515224358.GF11783@pd.tnic> <20130515235512.GT4442@linux.vnet.ibm.com> <20130517135641.GF23035@pd.tnic> User-Agent: Alpine 2.00 (LNX 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3390 Lines: 56 On Fri, 17 May 2013, Borislav Petkov wrote: > commit f7ea0fd639c2c48d3c61b6eec75362be290c6874 > Author: Thomas Gleixner > Date: Mon May 13 21:40:27 2013 +0200 > > tick: Don't invoke tick_nohz_stop_sched_tick() if the cpu is offline > > Now, when I halt the box, I see these splats originating from cpufreq's > od_dbs_timer adding a workqueue which does add_timer_on: > > > [ 49.338878] EXT4-fs (sda7): re-mounted. Opts: (null) > [ 51.502417] kvm: exiting hardware virtualization > [ 51.597330] ACPI: Preparing to enter system sleep state S5 > [ 51.603147] Disabling non-boot CPUs ... > [ 51.616759] ------------[ cut here ]------------ > [ 51.621460] WARNING: at arch/x86/kernel/smp.c:123 native_smp_send_reschedule+0x58/0x60() > [ 51.629638] Modules linked in: ext2 vfat fat loop snd_hda_codec_hdmi usbhid snd_hda_codec_realtek coretemp kvm_intel kvm snd_hda_intel snd_hda_codec crc32_pclmul crc32c_intel ghash_clmulni_intel snd_hwdep snd_pcm aesni_intel sb_edac aes_x86_64 ehci_pci snd_page_alloc glue_helper snd_timer xhci_hcd snd iTCO_wdt iTCO_vendor_support ehci_hcd edac_core lpc_ich acpi_cpufreq lrw gf128mul ablk_helper cryptd mperf usbcore usb_common soundcore mfd_core dcdbas evdev pcspkr processor i2c_i801 button microcode > [ 51.675581] CPU: 0 PID: 244 Comm: kworker/1:1 Tainted: G W 3.10.0-rc1+ #10 > [ 51.683407] Hardware name: Dell Inc. Precision T3600/0PTTT9, BIOS A08 01/24/2013 > [ 51.690901] Workqueue: events od_dbs_timer > [ 51.695069] 0000000000000009 ffff88043a2f5b68 ffffffff8161441c ffff88043a2f5ba8 > [ 51.702602] ffffffff8103e540 0000000000000033 0000000000000001 ffff88043d5f8000 > [ 51.710136] 00000000ffff0ce1 0000000000000001 ffff88044fc4fc08 ffff88043a2f5bb8 > [ 51.717691] Call Trace: > [ 51.720191] [] dump_stack+0x19/0x1b > [ 51.725396] [] warn_slowpath_common+0x70/0xa0 > [ 51.731473] [] warn_slowpath_null+0x1a/0x20 > [ 51.737378] [] native_smp_send_reschedule+0x58/0x60 > [ 51.744013] [] wake_up_nohz_cpu+0x2d/0xa0 > [ 51.749745] [] add_timer_on+0x8f/0x110 > [ 51.755214] [] __queue_delayed_work+0x16e/0x1a0 > [ 51.761470] [] ? try_to_grab_pending+0xd1/0x1a0 > [ 51.767724] [] mod_delayed_work_on+0x5a/0xa0 > [ 51.773719] [] gov_queue_work+0x4d/0xc0 > [ 51.779271] [] od_dbs_timer+0xcb/0x170 > [ 51.784734] [] process_one_work+0x1fd/0x540 > [ 51.790634] [] ? process_one_work+0x192/0x540 > [ 51.796711] [] worker_thread+0x122/0x380 > [ 51.802350] [] ? rescuer_thread+0x320/0x320 > [ 51.808264] [] kthread+0xea/0xf0 > [ 51.813200] [] ? flush_kthread_worker+0x150/0x150 > [ 51.819644] [] ret_from_fork+0x7c/0xb0 Just to not let this thread sleep -- I am seeing this as well, even with current Linus' tree (git HEAD == aa4f608). -- Jiri Kosina SUSE Labs -- 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/