From mboxrd@z Thu Jan 1 00:00:00 1970 From: Carsten Emde Subject: [OSADL QA 3.18.7-rt2 #1] WARNING at kernel/time/tick-sched.c:167 can_stop_full_tick+0x2d/0xcd() Date: Wed, 04 Mar 2015 22:24:31 +0100 Message-ID: <54F7780F.50109@osadl.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Cc: rt-users To: Sebastian Andrzej Siewior Return-path: Received: from toro.web-alm.net ([62.245.132.31]:32789 "EHLO toro.web-alm.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751764AbbCDVaL (ORCPT ); Wed, 4 Mar 2015 16:30:11 -0500 Sender: linux-rt-users-owner@vger.kernel.org List-ID: Some x86-based systems with CONFIG_NO_HZ_FULL=y run into this WARN_ON_ONCE during boot static bool can_stop_full_tick(void) { WARN_ON_ONCE(!irqs_disabled()); Thanks, Carsten. [ 22.706429] WARNING: CPU: 2 PID: 33 at kernel/time/tick-sched.c:167 can_stop_full_tick+0x2d/0xcd() [ 22.706700] Modules linked in: ppdev parport_pc parport cpufreq_stats eeprom lockd 8021q garp w83627ehf stp grace llc hwmon_vid coretemp ip6table_filter ip6_tables snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep microcode snd_seq iTCO_wdt iTCO_vendor_support snd_seq_device snd_pcm serio_raw pcspkr snd_timer snd r8169 lpc_ich soundcore mfd_core mii i2c_i801 acpi_cpufreq uinput sunrpc ipv6 i915 drm_kms_helper drm video i2c_algo_bit i2c_core [ 22.708082] CPU: 2 PID: 33 Comm: ksoftirqd/2 Not tainted 3.18.7-rt2 #7 [ 22.708083] Hardware name: System manufacturer System Product Name/P8H67-I DELUXE, BIOS 0502 02/11/2011 [ 22.708085] 00000000000000a7 ffff8802353b7c78 ffffffff814f36db 0000000000000001 [ 22.708086] 0000000000000000 ffff8802353b7cb8 ffffffff8103b011 ffff8802353b7cb8 [ 22.708087] ffffffff81098771 ffff880236e0d0f0 ffff880236e00000 000000000000000a [ 22.708087] Call Trace: [ 22.708091] [] dump_stack+0x4f/0x7c [ 22.708092] [] warn_slowpath_common+0x81/0x9c [ 22.708094] [] ? can_stop_full_tick+0x2d/0xcd [ 22.708095] [] warn_slowpath_null+0x1a/0x1c [ 22.708096] [] can_stop_full_tick+0x2d/0xcd [ 22.708098] [] __tick_nohz_full_check+0x52/0x93 [ 22.708099] [] nohz_full_kick_work_func+0xe/0x10 [ 22.708101] [] irq_work_run_list+0x36/0x57 [ 22.708102] [] irq_work_tick+0x42/0x66 [ 22.708103] [] run_timer_softirq+0x35/0x223 [ 22.708106] [] ? check_preemption_disabled+0x9b/0x132 [ 22.708108] [] ? vtime_common_account_irq_enter+0x5b/0x60 [ 22.708110] [] do_current_softirqs+0x18b/0x2d5 [ 22.708111] [] run_ksoftirqd+0x29/0x3d [ 22.708113] [] smpboot_thread_fn+0x201/0x206 [ 22.708114] [] ? smpboot_unregister_percpu_thread+0x67/0x67 [ 22.708116] [] kthread+0xc4/0xcc [ 22.708118] [] ? __init_kthread_worker+0x50/0x50 [ 22.708120] [] ret_from_fork+0x7c/0xb0 [ 22.708121] [] ? __init_kthread_worker+0x50/0x50