From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753072AbaJ0Ntx (ORCPT ); Mon, 27 Oct 2014 09:49:53 -0400 Received: from mga11.intel.com ([192.55.52.93]:27402 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752781AbaJ0Ntv (ORCPT ); Mon, 27 Oct 2014 09:49:51 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.04,796,1406617200"; d="scan'208";a="621367204" Date: Mon, 27 Oct 2014 21:49:48 +0800 From: Fengguang Wu To: Peter Zijlstra Cc: Peter Hurley , Marcel Holtmann , LKP , linux-kernel@vger.kernel.org, Richard Guy Briggs , Eric Paris Subject: Re: [rfcomm_run] WARNING: CPU: 0 PID: 95 at kernel/sched/core.c:7312 __might_sleep() Message-ID: <20141027134948.GA8977@wfg-t540p.sh.intel.com> References: <20141027130621.GA6336@wfg-t540p.sh.intel.com> <20141027133627.GH3337@twins.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20141027133627.GH3337@twins.programming.kicks-ass.net> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Oct 27, 2014 at 02:36:27PM +0100, Peter Zijlstra wrote: > On Mon, Oct 27, 2014 at 09:06:21PM +0800, Fengguang Wu wrote: > > Hi Peter, > > > > FYI, this bug seems still there on v3.18-rc2. > > Oh, right, I commented out that patch and the audit one because I was > waiting for some feedback. Lemme go prod people. audit? I do hit an kauditd_thread warning recently: [ 89.102903] ------------[ cut here ]------------ [ 89.107650] WARNING: CPU: 6 PID: 3175 at /kbuild/src/lkp/kernel/sched/core.c:7310 __might_sleep+0x8e/0xc0() [ 89.117606] do not call blocking ops when !TASK_RUNNING; state=1 set at [] kauditd_thread+0x168/0x220 [ 89.128588] Modules linked in: btrfs raid456 async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq ipmi_watchdog ipmi_msghandler ses enclosure sg s d_mod ata_generic pata_acpi floppy parport_pc parport snd_pcm snd_timer snd ata_piix soundcore i2c_i801 serio_raw mptsas libata pcspkr i5400_edac shpchp mptscsih edac_core mptbase i5k_amb tpm_infineon scsi_transport_sas [ 89.165503] CPU: 6 PID: 3175 Comm: kauditd Tainted: G W 3.18.0-rc2-g8696cce #1 [ 89.173988] Hardware name: Supermicro X7DW3/X7DWN, BIOS 6.00 09/28/2007 [ 89.180735] 0000000000000009 ffff880229d8bd78 ffffffff81876101 ffff88022fd90478 [ 89.188596] ffff880229d8bdc8 ffff880229d8bdb8 ffffffff8106a421 ffff880229d8bda8 [ 89.196483] ffffffff81b345f0 0000000000000038 0000000000000000 ffff8800bd0fd850 [ 89.204364] Call Trace: [ 89.206945] [] dump_stack+0x4e/0x68 [ 89.212209] [] warn_slowpath_common+0x81/0xa0 [ 89.218362] [] warn_slowpath_fmt+0x46/0x50 [ 89.224257] [] ? kauditd_thread+0x168/0x220 [ 89.230216] [] ? kauditd_thread+0x168/0x220 [ 89.236201] [] __might_sleep+0x8e/0xc0 [ 89.241746] [] kauditd_thread+0x1eb/0x220 [ 89.247536] [] ? wake_up_state+0x20/0x20 [ 89.253247] [] ? audit_printk_skb+0x70/0x70 [ 89.259237] [] kthread+0xef/0x110 [ 89.264330] [] ? kthread_create_on_node+0x180/0x180 [ 89.271010] [] ret_from_fork+0x7c/0xb0 [ 89.276543] [] ? kthread_create_on_node+0x180/0x180 [ 89.283205] ---[ end trace 4692477bd4539c42 ]--- However I'm not sure if it's a bug in 3.18-rc2, or one of the following trees introduced that warning. amirv/driver_updates arm-platforms/irq/irqchip_state arm-platforms/irq/priority_drop asoc/for-linus asoc/for-next asoc/topic/sgtl5000 bluetooth/master chanwoo-extcon/extcon-next drm-intel/drm-intel-next-queued drm-intel/drm-intel-nightly hwmon/poweroff-handler ipsec-next/master ipsec-next/testing jiangliu/ioapic/hotplug_v7 kees/lsm/modpin.old kvm/queue m68k/for-3.19 m68k/for-linus m68k/for-next m68k/m68k-queue mips-john/mips-for-linux-next net/master net-next/master peterz-queue/locking/urgent peterz-queue/perf/core peterz-queue/perf/urgent peterz-queue/sched/urgent peterz-queue/sched/wait peterz-queue/timers/urgent regulator/for-next renesas/cleanup-for-v3.19 renesas/devel renesas/dt-clocksource-for-v3.19 renesas/dt-du-for-v3.19 renesas/dt-for-v3.19 renesas/next renesas/soc-for-v3.19 sound/for-linus spi/for-linus spi/for-next staging/staging-testing tip/locking/urgent usb/usb-linus Thanks, Fengguang