linux-kernel - Re: [ 00/34] 3.4.59-stable review

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Date:	Mon, 19 Aug 2013 16:31:33 -0600
From:	Shuah Khan <shuah.kh@...sung.com>
To:	shuah.kh@...sung.com
Cc:	Stefan Lippers-Hollmann <s.L-H@....de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	shuahkhan@...il.com, Shuah Khan <shuah.kh@...sung.com>
Subject: Re: [ 00/34] 3.4.59-stable review

On 08/19/2013 04:22 PM, Shuah Khan wrote:
> On 08/19/2013 02:14 PM, Stefan Lippers-Hollmann wrote:
>> Hi
>>
>> On Monday 19 August 2013, Greg Kroah-Hartman wrote:
>>> On Mon, Aug 19, 2013 at 12:02:17PM -0600, Shuah Khan wrote:
>>>> On 08/18/2013 02:34 PM, Greg Kroah-Hartman wrote:
>> […]
>>>> and the following traces in dmesg:
>>>> [  124.802169] init: udevtrigger post-stop process (353) terminated
>>>> with status 1
>>>> [  243.439212] INFO: task crda:723 blocked for more than 120 seconds.
>>>
>>> What is "crda"?
>>>
>>> Any luck with bisection?  It should go fast as the majority of patches
>>> here are non-x86.
>>
>> crda is a userspace helper, invoked by udev events, which sets -and
>> intersects as needed- the regulatory domain settings for (modern,
>> cfg80211 based) wlan hardware based on the device's EEPROM regdom hint,
>> local configuration (country code) and eventual IEEE 802.11d hints
>> (country IEs) beaconed by access points nearby. It hooks into udev with
>> these udev rules (Debian/ 1.1.2-1):
>>
>> $ grep -v -e ^$ -e ^\# /lib/udev/rules.d/60-crda.rules
>> SUBSYSTEM=="ieee80211", ACTION=="add", RUN+="/lib/crda/setregdomain"
>>
>> $ grep -v -e ^$ -e ^\# /lib/udev/rules.d/85-regulatory.rules
>> KERNEL=="regulatory*", ACTION=="change", SUBSYSTEM=="platform",
>> RUN+="/sbin/crda"
>>
>> Full source is at [2], it should be installed on pretty much every
>> distro/ system released with wlan support for the last >>3 years.
>>
>> There are two iwl4965 patches in this series, which might be among the
>> first ones to check - /if/ you actually have that hardware, the second
>> one (iwl4965: reset firmware after rfkill off) might also indirectly
>> have an effect on blutetooth (via rfkill).
>>
>> Regards
>>     Stefan Lippers-Hollmann
>>
>> [1]    http://wireless.kernel.org/en/developers/Regulatory/CRDA
>> [2]    https://github.com/mcgrof/crda
>>
>
> Greg,
>
> git bisect shows the following patch as the problem:
>
> [ 26/34] genetlink: fix family dump race
>
>
> -- Shuah
>

Interesting. The same patch is in 3.10.8 as well, and I don't see this 
problem on this system on 3.10.8.

-- Shuah

-- 
Shuah Khan
Senior Linux Kernel Developer - Open Source Group
Samsung Research America(Silicon Valley)
shuah.kh@...sung.com | (970) 672-0658
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