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Date: Mon, 18 Feb 2013 11:54:23 +0100 (CET)
From: Thomas Gleixner <tglx@linutronix.de>
To: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
cc: Vincent Guittot <vincent.guittot@linaro.org>, paulmck@linux.vnet.ibm.com,
        Russell King - ARM Linux <linux@arm.linux.org.uk>,
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Subject: Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug
In-Reply-To: <512203B3.7090002@linux.vnet.ibm.com>
Message-ID: <alpine.LFD.2.02.1302181151040.22263@ionos>
References: <20130122073210.13822.50434.stgit@srivatsabhat.in.ibm.com> <510FBC01.2030405@linux.vnet.ibm.com> <87haloiwv0.fsf@rustcorp.com.au> <51134596.4080106@linux.vnet.ibm.com> <20130208154113.GV17833@n2100.arm.linux.org.uk> <51152B81.2050501@linux.vnet.ibm.com>
 <51153F72.1060005@linux.vnet.ibm.com> <CAKfTPtCe+cD7LLkb+D6pqG1SwG2V08ws=4XO3ttHEHV2qgmqPg@mail.gmail.com> <5118E2CD.90401@linux.vnet.ibm.com> <20130211190852.GA5695@linux.vnet.ibm.com> <5119BDFD.1000909@linux.vnet.ibm.com>
 <CAKfTPtAo2hQTfBKTVUuLKgsGJ2ZLD0UTR3fH9UFuJwyFt4n__w@mail.gmail.com> <511E8F3C.2010406@linux.vnet.ibm.com> <CAKfTPtD=2jn1AVjuhVP1ot7_8x9-W4==hNGZET5N9tRE7gtyMw@mail.gmail.com> <512203B3.7090002@linux.vnet.ibm.com>
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On Mon, 18 Feb 2013, Srivatsa S. Bhat wrote:
> Lockup observed while running this patchset, with CPU_IDLE and INTEL_IDLE turned
> on in the .config:
> 
>  smpboot: CPU 1 is now offline
> Kernel panic - not syncing: Watchdog detected hard LOCKUP on cpu 11
> Pid: 0, comm: swapper/11 Not tainted 3.8.0-rc7+stpmch13-1 #8
> Call Trace:
>  [<ffffffff812aba1e>] do_raw_spin_lock+0x7e/0x150
>  [<ffffffff815a64c1>] _raw_spin_lock_irqsave+0x61/0x70
>  [<ffffffff810c0758>] ? clockevents_notify+0x28/0x150
>  [<ffffffff815a6d37>] ? _raw_spin_unlock_irqrestore+0x77/0x80
>  [<ffffffff810c0758>] clockevents_notify+0x28/0x150
>  [<ffffffff8130459f>] intel_idle+0xaf/0xe0
>  [<ffffffff81472ee0>] ? disable_cpuidle+0x20/0x20
>  [<ffffffff81472ef9>] cpuidle_enter+0x19/0x20
>  [<ffffffff814734c1>] cpuidle_wrap_enter+0x41/0xa0
>  [<ffffffff81473530>] cpuidle_enter_tk+0x10/0x20
>  [<ffffffff81472f17>] cpuidle_enter_state+0x17/0x50
>  [<ffffffff81473899>] cpuidle_idle_call+0xd9/0x290
>  [<ffffffff810203d5>] cpu_idle+0xe5/0x140
>  [<ffffffff8159c603>] start_secondary+0xdd/0xdf

> BUG: spinlock lockup suspected on CPU#2, migration/2/19
>  lock: clockevents_lock+0x0/0x40, .magic: dead4ead, .owner: swapper/8/0, .owner_cpu: 8

Unfortunately there is no back trace for cpu8. That's probably caused
by the watchdog -> panic setting.

So we have no idea why cpu2 and 11 get stuck on the clockevents_lock
and without that information it's impossible to decode.

Thanks,

	tglx


From mboxrd@z Thu Jan  1 00:00:00 1970
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 for <linuxppc-dev@lists.ozlabs.org>; Mon, 18 Feb 2013 21:55:57 +1100 (EST)
Date: Mon, 18 Feb 2013 11:54:23 +0100 (CET)
From: Thomas Gleixner <tglx@linutronix.de>
To: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Subject: Re: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug
In-Reply-To: <512203B3.7090002@linux.vnet.ibm.com>
Message-ID: <alpine.LFD.2.02.1302181151040.22263@ionos>
References: <20130122073210.13822.50434.stgit@srivatsabhat.in.ibm.com>
 <510FBC01.2030405@linux.vnet.ibm.com> <87haloiwv0.fsf@rustcorp.com.au>
 <51134596.4080106@linux.vnet.ibm.com>
 <20130208154113.GV17833@n2100.arm.linux.org.uk>
 <51152B81.2050501@linux.vnet.ibm.com>
 <51153F72.1060005@linux.vnet.ibm.com>
 <CAKfTPtCe+cD7LLkb+D6pqG1SwG2V08ws=4XO3ttHEHV2qgmqPg@mail.gmail.com>
 <5118E2CD.90401@linux.vnet.ibm.com>
 <20130211190852.GA5695@linux.vnet.ibm.com>
 <5119BDFD.1000909@linux.vnet.ibm.com>
 <CAKfTPtAo2hQTfBKTVUuLKgsGJ2ZLD0UTR3fH9UFuJwyFt4n__w@mail.gmail.com>
 <511E8F3C.2010406@linux.vnet.ibm.com>
 <CAKfTPtD=2jn1AVjuhVP1ot7_8x9-W4==hNGZET5N9tRE7gtyMw@mail.gmail.com>
 <512203B3.7090002@linux.vnet.ibm.com>
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 linux-kernel@vger.kernel.org, walken@google.com, mingo@kernel.org,
 linux-arch@vger.kernel.org, Russell King - ARM Linux <linux@arm.linux.org.uk>,
 xiaoguangrong@linux.vnet.ibm.com, wangyun@linux.vnet.ibm.com,
 paulmck@linux.vnet.ibm.com, nikunj@linux.vnet.ibm.com,
 linux-pm@vger.kernel.org, Rusty Russell <rusty@rustcorp.com.au>,
 rostedt@goodmis.org, rjw@sisk.pl, namhyung@kernel.org,
 linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org, oleg@redhat.com,
 Vincent Guittot <vincent.guittot@linaro.org>, sbw@mit.edu, tj@kernel.org,
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On Mon, 18 Feb 2013, Srivatsa S. Bhat wrote:
> Lockup observed while running this patchset, with CPU_IDLE and INTEL_IDLE turned
> on in the .config:
> 
>  smpboot: CPU 1 is now offline
> Kernel panic - not syncing: Watchdog detected hard LOCKUP on cpu 11
> Pid: 0, comm: swapper/11 Not tainted 3.8.0-rc7+stpmch13-1 #8
> Call Trace:
>  [<ffffffff812aba1e>] do_raw_spin_lock+0x7e/0x150
>  [<ffffffff815a64c1>] _raw_spin_lock_irqsave+0x61/0x70
>  [<ffffffff810c0758>] ? clockevents_notify+0x28/0x150
>  [<ffffffff815a6d37>] ? _raw_spin_unlock_irqrestore+0x77/0x80
>  [<ffffffff810c0758>] clockevents_notify+0x28/0x150
>  [<ffffffff8130459f>] intel_idle+0xaf/0xe0
>  [<ffffffff81472ee0>] ? disable_cpuidle+0x20/0x20
>  [<ffffffff81472ef9>] cpuidle_enter+0x19/0x20
>  [<ffffffff814734c1>] cpuidle_wrap_enter+0x41/0xa0
>  [<ffffffff81473530>] cpuidle_enter_tk+0x10/0x20
>  [<ffffffff81472f17>] cpuidle_enter_state+0x17/0x50
>  [<ffffffff81473899>] cpuidle_idle_call+0xd9/0x290
>  [<ffffffff810203d5>] cpu_idle+0xe5/0x140
>  [<ffffffff8159c603>] start_secondary+0xdd/0xdf

> BUG: spinlock lockup suspected on CPU#2, migration/2/19
>  lock: clockevents_lock+0x0/0x40, .magic: dead4ead, .owner: swapper/8/0, .owner_cpu: 8

Unfortunately there is no back trace for cpu8. That's probably caused
by the watchdog -> panic setting.

So we have no idea why cpu2 and 11 get stuck on the clockevents_lock
and without that information it's impossible to decode.

Thanks,

	tglx

From mboxrd@z Thu Jan  1 00:00:00 1970
From: tglx@linutronix.de (Thomas Gleixner)
Date: Mon, 18 Feb 2013 11:54:23 +0100 (CET)
Subject: [PATCH v5 00/45] CPU hotplug: stop_machine()-free CPU hotplug
In-Reply-To: <512203B3.7090002@linux.vnet.ibm.com>
References: <20130122073210.13822.50434.stgit@srivatsabhat.in.ibm.com>
 <510FBC01.2030405@linux.vnet.ibm.com> <87haloiwv0.fsf@rustcorp.com.au>
 <51134596.4080106@linux.vnet.ibm.com>
 <20130208154113.GV17833@n2100.arm.linux.org.uk>
 <51152B81.2050501@linux.vnet.ibm.com>
 <51153F72.1060005@linux.vnet.ibm.com>
 <CAKfTPtCe+cD7LLkb+D6pqG1SwG2V08ws=4XO3ttHEHV2qgmqPg@mail.gmail.com>
 <5118E2CD.90401@linux.vnet.ibm.com>
 <20130211190852.GA5695@linux.vnet.ibm.com>
 <5119BDFD.1000909@linux.vnet.ibm.com>
 <CAKfTPtAo2hQTfBKTVUuLKgsGJ2ZLD0UTR3fH9UFuJwyFt4n__w@mail.gmail.com>
 <511E8F3C.2010406@linux.vnet.ibm.com>
 <CAKfTPtD=2jn1AVjuhVP1ot7_8x9-W4==hNGZET5N9tRE7gtyMw@mail.gmail.com>
 <512203B3.7090002@linux.vnet.ibm.com>
Message-ID: <alpine.LFD.2.02.1302181151040.22263@ionos>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Mon, 18 Feb 2013, Srivatsa S. Bhat wrote:
> Lockup observed while running this patchset, with CPU_IDLE and INTEL_IDLE turned
> on in the .config:
> 
>  smpboot: CPU 1 is now offline
> Kernel panic - not syncing: Watchdog detected hard LOCKUP on cpu 11
> Pid: 0, comm: swapper/11 Not tainted 3.8.0-rc7+stpmch13-1 #8
> Call Trace:
>  [<ffffffff812aba1e>] do_raw_spin_lock+0x7e/0x150
>  [<ffffffff815a64c1>] _raw_spin_lock_irqsave+0x61/0x70
>  [<ffffffff810c0758>] ? clockevents_notify+0x28/0x150
>  [<ffffffff815a6d37>] ? _raw_spin_unlock_irqrestore+0x77/0x80
>  [<ffffffff810c0758>] clockevents_notify+0x28/0x150
>  [<ffffffff8130459f>] intel_idle+0xaf/0xe0
>  [<ffffffff81472ee0>] ? disable_cpuidle+0x20/0x20
>  [<ffffffff81472ef9>] cpuidle_enter+0x19/0x20
>  [<ffffffff814734c1>] cpuidle_wrap_enter+0x41/0xa0
>  [<ffffffff81473530>] cpuidle_enter_tk+0x10/0x20
>  [<ffffffff81472f17>] cpuidle_enter_state+0x17/0x50
>  [<ffffffff81473899>] cpuidle_idle_call+0xd9/0x290
>  [<ffffffff810203d5>] cpu_idle+0xe5/0x140
>  [<ffffffff8159c603>] start_secondary+0xdd/0xdf

> BUG: spinlock lockup suspected on CPU#2, migration/2/19
>  lock: clockevents_lock+0x0/0x40, .magic: dead4ead, .owner: swapper/8/0, .owner_cpu: 8

Unfortunately there is no back trace for cpu8. That's probably caused
by the watchdog -> panic setting.

So we have no idea why cpu2 and 11 get stuck on the clockevents_lock
and without that information it's impossible to decode.

Thanks,

	tglx