linux-kernel - Re: linux-next: Tree for Apr 9 [cpufreq: NULL pointer deref]

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Date:	Fri, 12 Apr 2013 18:27:24 +0200
From:	Sedat Dilek <sedat.dilek@...il.com>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	cpufreq@...r.kernel.org, Linux PM list <linux-pm@...r.kernel.org>,
	Lists linaro-kernel <linaro-kernel@...ts.linaro.org>,
	Nathan Zimmer <nzimmer@....com>
Subject: Re: linux-next: Tree for Apr 9 [cpufreq: NULL pointer deref]

On Fri, Apr 12, 2013 at 5:45 PM, Sedat Dilek <sedat.dilek@...il.com> wrote:
> On Fri, Apr 12, 2013 at 4:24 PM, Sedat Dilek <sedat.dilek@...il.com> wrote:
>> On Fri, Apr 12, 2013 at 10:23 AM, Viresh Kumar <viresh.kumar@...aro.org> wrote:
>>> On 10 April 2013 11:44, Sedat Dilek <sedat.dilek@...il.com> wrote:
>>>> I found this "[RFC PATCH] kbuild: Build linux-tools package with 'make
>>>> deb-pkg'" from February 2012.
>>>> Can't say what happened to it...
>>>
>>> Sedat,
>>>
>>> Sorry for being late. I am down with Fever and throat infection since few days.
>>> Still struggling with it..
>>>
>>> There are few things i tried. Firstly the tag: next-20130326 is bad as there are
>>> some bad commits in cpufreq core in it.
>>>
>>> I then tried latest linux-next/master on my Thinkpad (model name        : Intel(R)
>>> Core(TM) i7-2640M CPU @ 2.80GHz) and couldn't boot it up. My ubuntu
>>> just hanged.
>>>
>>> Then i tried Rafael's linux-next branch
>>>
>>> 079576f Merge branch 'pm-cpufreq-next' into linux-next
>>>
>>> And couldn't find any issues with it. I am easily able to remove/add cpus at
>>> runtime..
>>>
>>> Can you give this branch a try?
>>>
>>
>> OK, you seem to be well again, nice to hear.
>>
>> I was doing the whole week spring-cleaning in the apartment of my parents.
>> Now, I have some minutes for a compilation run.
>>
>> I guess "cpufreq: Call __cpufreq_governor() with correct policy->cpus
>> mask" could be the correct fix, but will try the GIT branch you have
>> mentioned.
>>
>> - Sedat -
>>
>> [1] http://git.kernel.org/cgit/linux/kernel/git/rafael/linux-pm.git/commit/?h=linux-next&id=e4969ebac83fdea78d89c779331396728a4e6199
>>
>
> Both BROKEN here, specific pm-next commitid and pulling
> pm.git#linux-next into next-20130411 (see attached files).
>
> Is "cpufreq: convert cpufreq_driver to using RCU" the root cause of this all?
>

[ CC Nathan ]

NO, wrong assumption.

2013-04-12 18:04 Sedat Dilek        o [revert-cpufreq-rcu] Revert
"cpufreq: convert cpufreq_driver to using RCU"
2013-04-12 18:04 Sedat Dilek        o Revert "cpufreq: Call
__cpufreq_governor() with correct policy->cpus mask"
2013-04-11 23:24 Rafael J. Wysocki  M─┐ [pm-next-079576f] Merge branch
'pm-cpufreq-next' into linux-next

- Sedat -


> - Sedat -
>
> [1] http://git.kernel.org/cgit/linux/kernel/git/rafael/linux-pm.git/commit/?h=linux-next&id=5800043b2488a1c4c6e859af860644d37419d58b
>
>>> --
>>> viresh

View attachment "dmesg_3.9.0-rc6-1-revertcpufreqrcu-small_BROKEN.txt" of type "text/plain" (58875 bytes)