From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752545Ab1EXF7I (ORCPT ); Tue, 24 May 2011 01:59:08 -0400 Received: from mail-pv0-f174.google.com ([74.125.83.174]:62881 "EHLO mail-pv0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751763Ab1EXF7F (ORCPT ); Tue, 24 May 2011 01:59:05 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:subject :content-type:content-transfer-encoding; b=U5WLyzLT0B3Pvv2LBXot1zAYtcDBEttHRWcC9kvfkq4suAiYtiHkr4Rw8xnwxmfbBT sv6X2hRWsxdXzU4ZzyIB6NuXqkTLXgQs9Hj+Wdsz/o8lFEPXwYGJBekbHQot2mnfan0t nL6EEwBjPp8+OEMkfvrqqaGBB5nmB88IWT1gc= Message-ID: <4DDB491A.2070901@gmail.com> Date: Mon, 23 May 2011 22:58:50 -0700 From: "Justin P. Mattock" User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.17) Gecko/20110428 Fedora/3.1.10-1.fc15 Thunderbird/3.1.10 MIME-Version: 1.0 To: "linux-kernel@vger.kernel.org" Subject: INFO: suspicious rcu_dereference_check() usage. Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org seems this is just info, but probably should post this so you guys are aware..: [ 1308.117068] [ 1308.117072] =================================================== [ 1308.117080] [ INFO: suspicious rcu_dereference_check() usage. ] [ 1308.117085] --------------------------------------------------- [ 1308.117091] kernel/sched_rt.c:1266 invoked rcu_dereference_check() without protection! [ 1308.117096] [ 1308.117097] other info that might help us debug this: [ 1308.117099] [ 1308.117104] [ 1308.117106] rcu_scheduler_active = 1, debug_locks = 1 [ 1308.117112] 1 lock held by watchdog/1/16: [ 1308.117116] #0: (&rq->lock){-.-.-.}, at: [] post_schedule.part.25+0x14/0x4a [ 1308.117137] [ 1308.117139] stack backtrace: [ 1308.117146] Pid: 16, comm: watchdog/1 Not tainted 2.6.39-04906-g5e152b4-dirty #2 [ 1308.117151] Call Trace: [ 1308.117163] [] lockdep_rcu_dereference+0x9a/0xa2 [ 1308.117172] [] find_lowest_rq+0xfe/0x179 [ 1308.117182] [] push_rt_task.part.60+0x7b/0x1c8 [ 1308.117190] [] post_schedule_rt+0x20/0x28 [ 1308.117198] [] post_schedule.part.25+0x30/0x4a [ 1308.117209] [] schedule+0x725/0x773 [ 1308.117217] [] ? watchdog_enable+0x198/0x198 [ 1308.117226] [] ? cpu_clock+0x47/0x51 [ 1308.117234] [] ? watchdog_enable+0x198/0x198 [ 1308.117241] [] watchdog+0x6d/0xb0 [ 1308.117249] [] kthread+0xa8/0xb0 [ 1308.117259] [] kernel_thread_helper+0x4/0x10 [ 1308.117268] [] ? retint_restore_args+0x13/0x13 [ 1308.117276] [] ? __init_kthread_worker+0x5a/0x5a [ 1308.117283] [] ? gs_change+0x13/0x13 [ 1308.117675] [ 1308.117678] =================================================== [ 1308.117685] [ INFO: suspicious rcu_dereference_check() usage. ] [ 1308.117690] --------------------------------------------------- [ 1308.117695] kernel/sched.c:619 invoked rcu_dereference_check() without protection! [ 1308.117700] [ 1308.117701] other info that might help us debug this: [ 1308.117704] [ 1308.117708] [ 1308.117710] rcu_scheduler_active = 1, debug_locks = 1 [ 1308.117715] 2 locks held by rcuc0/7: [ 1308.117719] #0: (&rq->lock){-.-.-.}, at: [] schedule+0xe1/0x773 [ 1308.117736] #1: (&rq->lock/1){..-.-.}, at: [] double_lock_balance+0x6c/0x78 [ 1308.117753] [ 1308.117755] stack backtrace: [ 1308.117761] Pid: 7, comm: rcuc0 Not tainted 2.6.39-04906-g5e152b4-dirty #2 [ 1308.117766] Call Trace: [ 1308.117776] [] lockdep_rcu_dereference+0x9a/0xa2 [ 1308.117784] [] task_group+0x7f/0xbe [ 1308.117792] [] set_task_rq+0x17/0x70 [ 1308.117800] [] set_task_cpu+0xf7/0x14c [ 1308.117810] [] ? plist_check_head+0x9a/0x9e [ 1308.117818] [] ? plist_del+0x70/0x79 [ 1308.117825] [] ? dequeue_task_rt+0x38/0x3d [ 1308.117833] [] ? dequeue_task+0x87/0x8e [ 1308.117841] [] pull_rt_task+0x115/0x169 [ 1308.117849] [] pre_schedule_rt+0x1e/0x20 [ 1308.117857] [] schedule+0x2c9/0x773 [ 1308.117865] [] ? prepare_to_wait+0x6c/0x78 [ 1308.117875] [] rcu_cpu_kthread+0xeb/0x34d [ 1308.117883] [] ? __init_waitqueue_head+0x4b/0x4b [ 1308.117892] [] ? rcu_needs_cpu+0x1bd/0x1bd [ 1308.117899] [] kthread+0xa8/0xb0 [ 1308.117908] [] kernel_thread_helper+0x4/0x10 [ 1308.117916] [] ? retint_restore_args+0x13/0x13 [ 1308.117924] [] ? __init_kthread_worker+0x5a/0x5a [ 1308.117933] [] ? gs_change+0x13/0x13 full dmesg is here: http://fpaste.org/IqRy/ Justin P. Mattock