From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755331AbYDNDER (ORCPT ); Sun, 13 Apr 2008 23:04:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752595AbYDNDEG (ORCPT ); Sun, 13 Apr 2008 23:04:06 -0400 Received: from wa-out-1112.google.com ([209.85.146.177]:40721 "EHLO wa-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751359AbYDNDED (ORCPT ); Sun, 13 Apr 2008 23:04:03 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=j3sXRokgRlboPmbQbRcrouPVhf6zfLc8PNt6oQPNW7ylXPgKbiaSBSPo7rBws+JIZtX51flmmyLamhFcZBQ2XtXdA3GqjO14Tcyw11FZppbZTMICNIOQzkAIOkjav+TwZcPDkMb5AU+wuc1tS3oLawQ7aCwzjn2fVLOrZnNLvxU= Message-ID: Date: Sun, 13 Apr 2008 23:04:02 -0400 From: "Miles Lane" To: LKML Subject: 2.6.25-rc9 -- INFO: possible circular locking dependency detected MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [ 3217.586003] [ INFO: possible circular locking dependency detected ] [ 3217.586006] 2.6.25-rc9 #1 [ 3217.586008] ------------------------------------------------------- [ 3217.586011] pm-suspend/7421 is trying to acquire lock: [ 3217.586013] (&per_cpu(cpu_policy_rwsem, cpu)){----}, at: [] lock_policy_rwsem_write+0x33/0x5a [ 3217.586023] [ 3217.586024] but task is already holding lock: [ 3217.586026] (&cpu_hotplug.lock){--..}, at: [] cpu_hotplug_begin+0x2f/0x89 [ 3217.586033] [ 3217.586033] which lock already depends on the new lock. [ 3217.586035] [ 3217.586036] [ 3217.586037] the existing dependency chain (in reverse order) is: [ 3217.586039] [ 3217.586040] -> #3 (&cpu_hotplug.lock){--..}: [ 3217.586044] [] __lock_acquire+0xa02/0xbaf [ 3217.586052] [] lock_acquire+0x76/0x9d [ 3217.586058] [] mutex_lock_nested+0xd5/0x274 [ 3217.586066] [] get_online_cpus+0x2c/0x3e [ 3217.586072] [] sched_getaffinity+0xe/0x4d [ 3217.586079] [] __synchronize_sched+0x11/0x5f [ 3217.586087] [] synchronize_srcu+0x22/0x5b [ 3217.586093] [] srcu_notifier_chain_unregister+0x45/0x4c [ 3217.586100] [] cpufreq_unregister_notifier+0x1f/0x2f [ 3217.586107] [] cpufreq_governor_dbs+0x1e9/0x242 [cpufreq_conservative] [ 3217.586117] [] __cpufreq_governor+0xb2/0xe9 [ 3217.586124] [] __cpufreq_set_policy+0x13f/0x1c3 [ 3217.586130] [] store_scaling_governor+0x150/0x17f [ 3217.586137] [] store+0x42/0x5b [ 3217.586143] [] sysfs_write_file+0xb8/0xe3 [ 3217.586151] [] vfs_write+0x8c/0x108 [ 3217.586158] [] sys_write+0x3b/0x60 [ 3217.586165] [] sysenter_past_esp+0x6d/0xc5 [ 3217.586172] [] 0xffffffff [ 3217.586184] [ 3217.586185] -> #2 (&sp->mutex){--..}: [ 3217.586188] [] __lock_acquire+0xa02/0xbaf [ 3217.586195] [] lock_acquire+0x76/0x9d [ 3217.586201] [] mutex_lock_nested+0xd5/0x274 [ 3217.586208] [] synchronize_srcu+0x16/0x5b [ 3217.586214] [] srcu_notifier_chain_unregister+0x45/0x4c [ 3217.586220] [] cpufreq_unregister_notifier+0x1f/0x2f [ 3217.586227] [] cpufreq_governor_dbs+0x1e9/0x242 [cpufreq_conservative] [ 3217.586235] [] __cpufreq_governor+0xb2/0xe9 [ 3217.586242] [] __cpufreq_set_policy+0x13f/0x1c3 [ 3217.586248] [] store_scaling_governor+0x150/0x17f [ 3217.586255] [] store+0x42/0x5b [ 3217.586261] [] sysfs_write_file+0xb8/0xe3 [ 3217.586268] [] vfs_write+0x8c/0x108 [ 3217.586274] [] sys_write+0x3b/0x60 [ 3217.586280] [] sysenter_past_esp+0x6d/0xc5 [ 3217.586287] [] 0xffffffff [ 3217.586297] [ 3217.586298] -> #1 (dbs_mutex#2){--..}: [ 3217.586302] [] __lock_acquire+0xa02/0xbaf [ 3217.586309] [] lock_acquire+0x76/0x9d [ 3217.586315] [] mutex_lock_nested+0xd5/0x274 [ 3217.586322] [] cpufreq_governor_dbs+0x6e/0x242 [cpufreq_conservative] [ 3217.586330] [] __cpufreq_governor+0xb2/0xe9 [ 3217.586336] [] __cpufreq_set_policy+0x155/0x1c3 [ 3217.586343] [] store_scaling_governor+0x150/0x17f [ 3217.586349] [] store+0x42/0x5b [ 3217.586355] [] sysfs_write_file+0xb8/0xe3 [ 3217.586362] [] vfs_write+0x8c/0x108 [ 3217.586369] [] sys_write+0x3b/0x60 [ 3217.586375] [] sysenter_past_esp+0x6d/0xc5 [ 3217.586381] [] 0xffffffff [ 3217.586451] [ 3217.586452] -> #0 (&per_cpu(cpu_policy_rwsem, cpu)){----}: [ 3217.586456] [] __lock_acquire+0x929/0xbaf [ 3217.586463] [] lock_acquire+0x76/0x9d [ 3217.586469] [] down_write+0x28/0x44 [ 3217.586475] [] lock_policy_rwsem_write+0x33/0x5a [ 3217.586482] [] cpufreq_cpu_callback+0x43/0x66 [ 3217.586489] [] notifier_call_chain+0x2b/0x4a [ 3217.586495] [] __raw_notifier_call_chain+0xe/0x10 [ 3217.586501] [] _cpu_down+0x71/0x1f8 [ 3217.586507] [] disable_nonboot_cpus+0x4a/0xc6 [ 3217.586513] [] suspend_devices_and_enter+0x6c/0x101 [ 3217.586521] [] enter_state+0xc4/0x119 [ 3217.586527] [] state_store+0x96/0xac [ 3217.586533] [] kobj_attr_store+0x1a/0x22 [ 3217.586541] [] sysfs_write_file+0xb8/0xe3 [ 3217.586547] [] vfs_write+0x8c/0x108 [ 3217.586554] [] sys_write+0x3b/0x60 [ 3217.586560] [] sysenter_past_esp+0x6d/0xc5 [ 3217.586567] [] 0xffffffff [ 3217.586578] [ 3217.586578] other info that might help us debug this: [ 3217.586580] [ 3217.586582] 5 locks held by pm-suspend/7421: [ 3217.586584] #0: (&buffer->mutex){--..}, at: [] sysfs_write_file+0x25/0xe3 [ 3217.586590] #1: (pm_mutex){--..}, at: [] enter_state+0x103/0x119 [ 3217.586596] #2: (pm_sleep_rwsem){--..}, at: [] device_suspend+0x25/0x1ad [ 3217.586604] #3: (cpu_add_remove_lock){--..}, at: [] cpu_maps_update_begin+0xf/0x11 [ 3217.586610] #4: (&cpu_hotplug.lock){--..}, at: [] cpu_hotplug_begin+0x2f/0x89 [ 3217.586616] [ 3217.586617] stack backtrace: [ 3217.586620] Pid: 7421, comm: pm-suspend Not tainted 2.6.25-rc9 #1 [ 3217.586627] [] print_circular_bug_tail+0x5b/0x66 [ 3217.586634] [] ? print_circular_bug_entry+0x39/0x43 [ 3217.586643] [] __lock_acquire+0x929/0xbaf [ 3217.586656] [] lock_acquire+0x76/0x9d [ 3217.586661] [] ? lock_policy_rwsem_write+0x33/0x5a [ 3217.586668] [] down_write+0x28/0x44 [ 3217.586673] [] ? lock_policy_rwsem_write+0x33/0x5a [ 3217.586678] [] lock_policy_rwsem_write+0x33/0x5a [ 3217.586684] [] cpufreq_cpu_callback+0x43/0x66 [ 3217.586689] [] notifier_call_chain+0x2b/0x4a [ 3217.586696] [] __raw_notifier_call_chain+0xe/0x10 [ 3217.586701] [] _cpu_down+0x71/0x1f8 [ 3217.586710] [] disable_nonboot_cpus+0x4a/0xc6 [ 3217.586716] [] suspend_devices_and_enter+0x6c/0x101 [ 3217.586721] [] enter_state+0xc4/0x119 [ 3217.586726] [] state_store+0x96/0xac [ 3217.586731] [] ? state_store+0x0/0xac [ 3217.586736] [] kobj_attr_store+0x1a/0x22 [ 3217.586742] [] sysfs_write_file+0xb8/0xe3 [ 3217.586750] [] ? sysfs_write_file+0x0/0xe3 [ 3217.586755] [] vfs_write+0x8c/0x108 [ 3217.586762] [] sys_write+0x3b/0x60 [ 3217.586769] [] sysenter_past_esp+0x6d/0xc5 [ 3217.586780] ======================= [ 3217.588064] Breaking affinity for irq 16