From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Luis Claudio R. Goncalves" Subject: 3.18.7-rt2: NOHZ_FULL warning at boot Date: Thu, 26 Feb 2015 17:05:47 -0300 Message-ID: <20150226200547.GL4111@uudg.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii To: linux-rt-users@vger.kernel.org Return-path: Received: from mail-qc0-f177.google.com ([209.85.216.177]:46296 "EHLO mail-qc0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753551AbbBZUFv (ORCPT ); Thu, 26 Feb 2015 15:05:51 -0500 Received: by qcxr5 with SMTP id r5so10408440qcx.13 for ; Thu, 26 Feb 2015 12:05:50 -0800 (PST) Received: from lclaudio.dyndns.org ([177.157.5.90]) by mx.google.com with ESMTPSA id 191sm1177431qht.13.2015.02.26.12.05.50 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 26 Feb 2015 12:05:50 -0800 (PST) Content-Disposition: inline Sender: linux-rt-users-owner@vger.kernel.org List-ID: Hello, I have been seeing the warning below at boot time on 3.18.7-rt2. Anybody else seeing it? [ 1.537207] ------------[ cut here ]------------ [ 1.537215] WARNING: CPU: 1 PID: 20 at /home/lclaudio/SANDBOX/kernel-rt/kernel/time/tick-sched.c:167 can_stop_full_tick+0x1ee/0x2b0() [ 1.537219] Modules linked in: efivarfs [ 1.537224] CPU: 1 PID: 20 Comm: ksoftirqd/1 Not tainted 3.18.7-rt2+ #2 [ 1.537225] Hardware name: Hewlett-Packard p7-1512/2ADA, BIOS 8.15 02/05/2013 [ 1.537227] 0000000000000000 000000005b4bc999 ffff880191503bb8 ffffffff8175a165 [ 1.537228] 0000000000000000 0000000000000000 ffff880191503bf8 ffffffff8107add1 [ 1.537229] ffff880191503be8 ffff880198fce280 ffff880198e00000 0000000000000000 [ 1.537229] Call Trace: [ 1.537233] [] dump_stack+0x4f/0x7c [ 1.537235] [] warn_slowpath_common+0x81/0xc0 [ 1.537237] [] warn_slowpath_null+0x1a/0x20 [ 1.537238] [] can_stop_full_tick+0x1ee/0x2b0 [ 1.537240] [] __tick_nohz_full_check+0x76/0xc0 [ 1.537241] [] nohz_full_kick_work_func+0xe/0x10 [ 1.537243] [] irq_work_run_list+0x3c/0x60 [ 1.537244] [] irq_work_tick+0x3e/0x90 [ 1.537246] [] run_timer_softirq+0x44/0x3b0 [ 1.537248] [] ? _raw_spin_unlock+0x35/0x60 [ 1.537250] [] ? vtime_account_system+0x99/0xb0 [ 1.537252] [] ? vtime_common_account_irq_enter+0x4b/0x80 [ 1.537254] [] do_current_softirqs.isra.11+0x274/0x550 [ 1.537255] [] run_ksoftirqd+0x26/0x50 [ 1.537257] [] smpboot_thread_fn+0x18d/0x2d0 [ 1.537259] [] ? SyS_setgroups+0x150/0x150 [ 1.537260] [] kthread+0xfd/0x120 [ 1.537262] [] ? wait_for_completion+0xe7/0x120 [ 1.537264] [] ? kthread_create_on_node+0x260/0x260 [ 1.537266] [] ret_from_fork+0x7c/0xb0 [ 1.537267] [] ? kthread_create_on_node+0x260/0x260 [ 1.537268] ---[ end trace 0000000000000002 ]--- >>From kernel/time/tick-sched.c line 167: static bool can_stop_full_tick(void) { WARN_ON_ONCE(!irqs_disabled()); The config in use, NO_HZ related is: CONFIG_NO_HZ_COMMON=y # CONFIG_NO_HZ_IDLE is not set CONFIG_NO_HZ_FULL=y CONFIG_NO_HZ_FULL_ALL=y CONFIG_NO_HZ_FULL_SYSIDLE=y CONFIG_NO_HZ_FULL_SYSIDLE_SMALL=8 CONFIG_NO_HZ=y CONFIG_HZ_1000=y CONFIG_HZ=1000 Cheers, Luis -- [ Luis Claudio R. Goncalves Bass - Gospel - RT ] [ Fingerprint: 4FDD B8C4 3C59 34BD 8BE9 2696 7203 D980 A448 C8F8 ]