From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755437Ab2CRPgb (ORCPT ); Sun, 18 Mar 2012 11:36:31 -0400 Received: from mail-ob0-f174.google.com ([209.85.214.174]:36703 "EHLO mail-ob0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754849Ab2CRPg3 (ORCPT ); Sun, 18 Mar 2012 11:36:29 -0400 Message-ID: <4F6600FA.7050005@gmail.com> Date: Sun, 18 Mar 2012 08:36:26 -0700 From: "Justin P. Mattock" User-Agent: Mozilla/5.0 (X11; Linux i686; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: INFO: suspicious RCU usage. on 3.3.0-rc7-next-20120316 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 with the current linux-next I am seeing this in dmesg..: [ 3.643089] isapnp: No Plug & Play device found [ 3.643690] Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled [ 3.673061] [ 3.699307] =============================== [ 3.725757] [ INFO: suspicious RCU usage. ] [ 3.752134] 3.3.0-rc7-next-20120316 #1 Not tainted [ 3.778508] ------------------------------- [ 3.778510] kernel/cgroup.c:1719 suspicious rcu_dereference_check() usage! [ 3.778512] [ 3.778512] other info that might help us debug this: [ 3.778513] [ 3.778515] [ 3.778515] rcu_scheduler_active = 1, debug_locks = 1 [ 3.778517] no locks held by swapper/0/1. [ 3.778517] [ 3.778518] stack backtrace: [ 3.778519] Pid: 1, comm: swapper/0 Not tainted 3.3.0-rc7-next-20120316 #1 [ 3.778521] Call Trace: [ 3.778528] [] ? printk+0x1d/0x1f [ 3.778534] [] lockdep_rcu_suspicious+0xca/0x100 [ 3.778536] [] cgroup_path+0x17a/0x1c0 [ 3.778540] [] ? __raw_spin_lock_init+0x32/0x60 [ 3.778545] [] blkg_lookup_create+0x1aa/0x430 [ 3.778548] [] ? _raw_spin_lock_irq+0x55/0x60 [ 3.778550] [] blk_throtl_init+0x11b/0x210 [ 3.778552] [] ? blk_throtl_init+0x3a/0x210 [ 3.778554] [] blkcg_init_queue+0x30/0x80 [ 3.778558] [] blk_alloc_queue_node+0x1e7/0x220 [ 3.778560] [] blk_alloc_queue+0x12/0x20 [ 3.778563] [] brd_alloc+0x69/0x180 [ 3.778566] [] ? device_pm_init+0x65/0x90 [ 3.778569] [] brd_init+0xb0/0x185 [ 3.778574] [] ? device_register+0x17/0x20 [ 3.778577] [] do_one_initcall+0x34/0x170 [ 3.778578] [] ? regmap_initcall+0xc/0xc [ 3.778582] [] kernel_init+0x103/0x198 [ 3.778584] [] ? rdinit_setup+0x22/0x22 [ 3.778586] [] ? start_kernel+0x38b/0x38b [ 3.778589] [] kernel_thread_helper+0x6/0x10 [ 3.778592] [] ? tty_change_softcar+0x29/0xe0 [ 3.780902] brd: module loaded [ 3.782352] loop: module loaded [ 3.782641] ahci 0000:00:1f.2: version 3. dmesg here: http://fpaste.org/CpBD/ from what I remember I was doing a git pull and ran out of memory then ran git pull again and everything seemed alright, so I proceeded with building and running this kernel on reboot this showed up. Justin P. Mattock