Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1752778AbbBYQcS (ORCPT <rfc822;w@1wt.eu>);
	Wed, 25 Feb 2015 11:32:18 -0500
Received: from userp1040.oracle.com ([156.151.31.81]:44212 "EHLO
	userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1752120AbbBYQcQ (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Wed, 25 Feb 2015 11:32:16 -0500
Message-ID: <54EDF8FC.8060204@oracle.com>
Date: Wed, 25 Feb 2015 08:31:56 -0800
From: santosh shilimkar <santosh.shilimkar@oracle.com>
Organization: Oracle Corporation
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.1.2
MIME-Version: 1.0
To: Ethan Zhao <ethan.kernel@gmail.com>,
        viresh kumar <viresh.kumar@linaro.org>
CC: ethan zhao <ethan.zhao@oracle.com>, Rafael Wysocki <rjw@rjwysocki.net>,
        Linaro Kernel Mailman List <linaro-kernel@lists.linaro.org>,
        "linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>, guangyu.sun@oracle.com,
        "sriharsha.devdas@oracle.com" <sriharsha.devdas@oracle.com>
Subject: Re: [PATCH Resend] cpufreq: Set cpufreq_cpu_data to NULL before putting
 kobject
References: <ed8fd187687cb4ea9afd0bc32107ca5abf03e679.1422663249.git.viresh.kumar@linaro.org>	<54CEECF7.7020504@oracle.com>	<CAKohpon10=xemOZkvqMTV2JbdTMXPDiW+-v52Qzm8SsNymN-Kg@mail.gmail.com>	<54CEF123.5050106@oracle.com>	<CAKohponOvEnG2Tt5sFPLAHA_bHckHboR7t35-7ey5b_cCKfvKg@mail.gmail.com>	<54CEF574.6040404@oracle.com>	<CAKohpom589bFL4-eyR1=qrc6uoRtjck_z_SBHS3XU8dJSc4yFg@mail.gmail.com>	<54CEF7AA.80401@oracle.com>	<CAKohponfkJVYFTsj6ijy0iY3t-R=zN=M0ZkoDmYa-WYTzPuvmw@mail.gmail.com>	<54CEFA23.7040705@oracle.com>	<CAKohpomBcBVXLW-RW1VXAtkTw-BKd7tHmeFJgmf9CM3vi1Ki-Q@mail.gmail.com>	<54CF0106.5050601@oracle.com>	<CAKohpomYpEAeQeaB7HVT0cBT5H_P8QQ-e+FQ5OqUoOvfz2ZnOQ@mail.gmail.com>	<54CF9209.1050403@oracle.com>	<CABawtvPtd2Ln6ghYRHhPy5SbUZqe2yncyeOta2CLt7fV1=504A@mail.gmail.com>	<54ED50F5.5080603@linaro.org> <CABawtvPQNY91jS7gUWVVUZ87SG9zjtXDmTYsi0Q7hLbH_dPYng@mail.gmail.com>
In-Reply-To: <CABawtvPQNY91jS7gUWVVUZ87SG9zjtXDmTYsi0Q7hLbH_dPYng@mail.gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Source-IP: aserv0022.oracle.com [141.146.126.234]
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org
Content-Length: 3628
Lines: 75

On 2/24/2015 9:47 PM, Ethan Zhao wrote:
> Viresh,
>
>      Will do that when I get the test box.
>
Thanks Ethan.

>
> On Wed, Feb 25, 2015 at 12:35 PM, viresh kumar <viresh.kumar@linaro.org> wrote:
>> On Wednesday 25 February 2015 08:54 AM, Ethan Zhao wrote:
>>> Viresh,
>>>    With this patch applied, still got the following warning and panic,
>>> seems it needs more care.
>>>
>>>       54.474618] ------------[ cut here ]------------
>>> [   54.545816] WARNING: CPU: 0 PID: 213 at include/linux/kref.h:47
>>> kobject_get+0x41/0x50()
>>> [   54.642595] Modules linked in: i2c_i801(+) mfd_core shpchp(+)
>>> acpi_cpufreq(+) edac_core ioatdma(+) xfs libcrc32c ast syscopyarea ixgbe
>>> sysfillrect sysimgblt sr_mod sd_mod drm_kms_helper igb mdio cdrom e1000e ahci
>>> dca ttm libahci uas drm i2c_algo_bit ptp megaraid_sas libata usb_storage
>>> i2c_core pps_core dm_mirror dm_region_hash dm_log dm_mod
>>> [   55.007264] CPU: 0 PID: 213 Comm: kworker/0:2 Not tainted
>>> 3.18.5
>>> [   55.099970] Hardware name: Oracle Corporation SUN FIRE X4170 M2 SERVER
>>>     /ASSY,MOTHERBOARD,X4170, BIOS 08120104 05/08/2012
>>> [   55.239736] Workqueue: kacpi_notify acpi_os_execute_deferred
>>> [   55.308598]  0000000000000000 00000000bd730b61 ffff88046742baf8
>>> ffffffff816b7edb
>>> [   55.398305]  0000000000000000 0000000000000000 ffff88046742bb38
>>> ffffffff81078ae1
>>> [   55.488040]  ffff88046742bbd8 ffff8806706b3000 0000000000000292
>>> 0000000000000000
>>> [   55.577776] Call Trace:
>>> [   55.608228]  [<ffffffff816b7edb>] dump_stack+0x46/0x58
>>> [   55.670895]  [<ffffffff81078ae1>] warn_slowpath_common+0x81/0xa0
>>> [   55.743952]  [<ffffffff81078bfa>] warn_slowpath_null+0x1a/0x20
>>> [   55.814929]  [<ffffffff8130d0d1>] kobject_get+0x41/0x50
>>> [   55.878654]  [<ffffffff8153e955>] cpufreq_cpu_get+0x75/0xc0
>>> [   55.946528]  [<ffffffff8153f37e>] cpufreq_update_policy+0x2e/0x1f0
>>> [   56.021682]  [<ffffffff810bf9d2>] ? up+0x32/0x50
>>> [   56.078126]  [<ffffffff813ab975>] ? acpi_ns_get_node+0xcb/0xf2
>>> [   56.148974]  [<ffffffff813abdc9>] ? acpi_evaluate_object+0x22c/0x252
>>> [   56.226066]  [<ffffffff813ac3c2>] ? acpi_get_handle+0x95/0xc0
>>> [   56.295871]  [<ffffffff8138a7fb>] ? acpi_has_method+0x25/0x40
>>> [   56.365661]  [<ffffffff813bbcd4>] acpi_processor_ppc_has_changed+0x77/0x82
>>> [   56.448956]  [<ffffffff8108f726>] ? move_linked_works+0x66/0x90
>>> [   56.520842]  [<ffffffff813b87b9>] acpi_processor_notify+0x58/0xe7
>>> [   56.594807]  [<ffffffff8139dfd8>] acpi_ev_notify_dispatch+0x44/0x5c
>>> [   56.670859]  [<ffffffff81388fe3>] acpi_os_execute_deferred+0x15/0x22
>>> [   56.747936]  [<ffffffff8109268e>] process_one_work+0x14e/0x3f0
>>> [   56.818766]  [<ffffffff81092d9b>] worker_thread+0x11b/0x4d0
>>> [   56.886486]  [<ffffffff81092c80>] ? rescuer_thread+0x350/0x350
>>> [   56.957316]  [<ffffffff810984f1>] kthread+0xe1/0x100
>>> [   57.017742]  [<ffffffff81098410>] ? kthread_create_on_node+0x1b0/0x1b0
>>> [   57.096903]  [<ffffffff816bfe7c>] ret_from_fork+0x7c/0xb0
>>> [   57.162534]  [<ffffffff81098410>] ? kthread_create_on_node+0x1b0/0x1b0
>>> [   57.241680] ---[ end trace dce06bb76f547de5 ]---
>>>
>>>
>>> Any idea ?
>>
>> No. Santosh reported this to me few days back, I asked him to perform some
>> testing but don't know what happened after that..
>>
I didn't get time to re-look into it so far.

Regards,
Santosh

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/