From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753596AbdCGCPM (ORCPT ); Mon, 6 Mar 2017 21:15:12 -0500 Received: from esa4.hgst.iphmx.com ([216.71.154.42]:31180 "EHLO esa4.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752815AbdCGCPD (ORCPT ); Mon, 6 Mar 2017 21:15:03 -0500 X-IronPort-AV: E=Sophos;i="5.35,256,1483977600"; d="scan'208";a="1149285" Authentication-Results: spf=pass (sender IP is 74.221.232.55) smtp.mailfrom=sandisk.com; vger.kernel.org; dkim=none (message not signed) header.d=none;vger.kernel.org; dmarc=bestguesspass action=none header.from=sandisk.com; X-AuditID: ac1c2134-82bff70000005688-45-58be12e34788 From: Bart Van Assche To: "tglx@linutronix.de" , "torvalds@linux-foundation.org" CC: "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 Thread-Topic: [GIT pull] 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Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mail.home.local id v272FLcO014910 On Mon, 2016-10-03 at 19:37 +0200, Thomas Gleixner wrote: > Yet another batch of cpu hotplug core updates and conversions: > > - Provide core infrastructure for multi instance drivers so the drivers > do not have to keep custom lists. > > - Convert custom lists to the new infrastructure. The block-mq custom > list conversion comes through the block tree and makes the diffstat > tip over to more lines removed than added. > > - Handle unbalanced hotplug enable/disable calls more gracefully. > > - Remove the obsolete CPU_STARTING/DYING notifier support. > > - Convert another batch of notifier users. > > The relayfs changes which conflicted with the conversion have been > shipped to me by Andrew. > > The remaining lot is targeted for 4.10 so that we finally can remove > the rest of the notifiers. 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: # ./system-log | grep -a cpuhp_issue_call Mar  3 11:32:49 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  3 12:04:38 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  3 12:12:50 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  3 12:21:02 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  3 12:29:13 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  3 12:37:25 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  3 12:45:36 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  3 12:53:48 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  3 16:59:52 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  3 17:08:04 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  3 17:16:15 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  3 17:24:27 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  3 17:32:39 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  3 17:40:50 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  3 17:49:02 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  3 17:57:13 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  3 18:05:25 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  3 18:13:36 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  6 16:34:17 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  6 16:42:29 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  6 16:50:40 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  6 16:58:52 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  6 17:07:04 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  6 17:15:15 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  6 17:23:27 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  6 17:31:38 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  6 17:39:50 kernel:  cpuhp_issue_call+0xb9/0xe0 Mar  6 17:48:01 kernel:  cpuhp_issue_call+0xb9/0xe0 The latest complaint is as follows: 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: Handle 0x0400, DMI type 4, 42 bytes Processor Information        Socket Designation: CPU1        Type: Central Processor        Family: Xeon        Manufacturer: Intel        ID: F2 06 03 00 FF FB EB BF        Signature: Type 0, Family 6, Model 63, Stepping 2 Please let me know if you need more information. Thanks, Bart.