From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755305AbdCGLM6 (ORCPT ); Tue, 7 Mar 2017 06:12:58 -0500 Received: from Galois.linutronix.de ([146.0.238.70]:39780 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754576AbdCGLMO (ORCPT ); Tue, 7 Mar 2017 06:12:14 -0500 Date: Tue, 7 Mar 2017 10:30:00 +0100 (CET) From: Thomas Gleixner To: Bart Van Assche cc: "torvalds@linux-foundation.org" , "mingo@kernel.org" , "linux-kernel@vger.kernel.org" , "hpa@zytor.com" , "akpm@linux-foundation.org" Subject: Re: [GIT pull] CPU hotplug updates for 4.9 In-Reply-To: <1488851515.6858.2.camel@sandisk.com> Message-ID: References: <1488851515.6858.2.camel@sandisk.com> User-Agent: Alpine 2.20 (DEB 67 2015-01-07) 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 On Tue, 7 Mar 2017, Bart Van Assche wrote: > On Mon, 2016-10-03 at 19:37 +0200, Thomas Gleixner wrote: > > Yet another batch of cpu hotplug core updates and conversions: > > Hello Thomas, > > Although I'm not sure this behavior has been introduced by the changes in this > pull request, since I started testing v4.11-rc[01] I ran several times into a > cpuhp_issue_call() hang: ... > INFO: task systemd-udevd:837 blocked for more than 480 seconds. > Tainted: G I 4.11.0-rc1-dbg+ #1 > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > systemd-udevd D 0 837 542 0x00000104 > Call Trace: > __schedule+0x302/0xc30 > schedule+0x38/0x90 > schedule_timeout+0x255/0x490 > wait_for_completion+0x103/0x170 > cpuhp_issue_call+0xb9/0xe0 > __cpuhp_setup_state+0xf6/0x180 > pkg_temp_thermal_init+0x76/0x1000 [x86_pkg_temp_thermal] > do_one_initcall+0x3e/0x170 > do_init_module+0x5a/0x1ed > load_module+0x2339/0x2a40 > SYSC_finit_module+0xbc/0xf0 > SyS_finit_module+0x9/0x10 > do_syscall_64+0x57/0x140 > entry_SYSCALL64_slow_path+0x25/0x25 > > Kernel v4.10 runs fine on the same system. From the dmidecode output: That's odd. There was no change related to the hotplug stuff post 4.10 neither in the core nor in that particular driver. I have no immediate clue what to look for aside of asking you whether you could do a bisect between 4.10 and 4.11-rc1. Thanks, tglx