On Wed, May 26, 2010 at 12:01 PM, David DEMELIER
<demelier.david@gmail.com> wrote:
> 2010/5/26 Giovanni Trematerra <giovanni.trematerra@gmail.com>:
>> On Wed, May 26, 2010 at 11:14 AM, David DEMELIER
>> <demelier.david@gmail.com> wrote:
>>> 2010/5/25 Giovanni Trematerra <giovanni.trematerra@gmail.com>:
>>>> On Tue, May 25, 2010 at 5:52 PM, David DEMELIER
>>>> <demelier.david@gmail.com> wrote:
>>>>> 2010/5/25 Giovanni Trematerra <giovanni.trematerra@gmail.com>:
>>>>>> On Mon, May 24, 2010 at 9:43 PM, David DEMELIER
>>>>>> <demelier.david@gmail.com> wrote:
>>>>>>> 2010/5/12 Giovanni Trematerra <giovanni.trematerra@gmail.com>:
>>>>>>>> On Fri, May 7, 2010 at 8:33 PM, Demelier David <demelier.david@gma=
il.com> wrote:
>>>>>>>>> Le Vendredi 07 mai 2010 =E0 18:22 +0200, Giovanni Trematerra a =
=E9crit :
>>>>>>>>>> On Fri, May 7, 2010 at 2:08 PM, Demelier David <demelier.david@g=
mail.com> wrote:
>>>>>>>>>> > Hi,
>>>>>>>>>> > =A0 =A0 =A0 =A0I noticed that pluggin the AC adaptor when I bo=
ot without it does not
>>>>>>>>>> > =A0 =A0 =A0 =A0panic. It only panic when removing it.
>>>>>>>>>> >
>>>>>>>>>> > =A0 =A0 =A0 =A0Maybe that could help ?
>>>>>>>>>> >
>>>>>>>>>>
>>>>>>>>>> Good to know. The problem lies somewhere when performance state =
change.
>>>>>>>>>> In your case it happens when you remove AC adaptor. Let's hope s=
omeone on
>>>>>>>>>> acpi@ ml comes up with a good idea.
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Okay so for the moment no change, I'll wait for someone with an i=
dea
>>>>>>>>> that could solve my problem. For me because the panic only happen=
s when
>>>>>>>>> changing profile from ac plugged -> ac unplugged (and not the rev=
erse) I
>>>>>>>>> would think it's a cpu related acpi issue.
>>>>>>>>>
>>>>>>>>
>>>>>>>> I looked deeper and it seems to me that when you unplug the AC
>>>>>>>> adapter, acpi_cpu_notify calls acpi_cpu_cx_cst that try to allocat=
e a
>>>>>>>> new cx_ptr->p_lvlx =A0via acpi_PkgGas.
>>>>>>>> If acpi_PkgGas set cx_ptr->p_lvlx to NULL for any reasons you'll h=
ave
>>>>>>>> the panic that you reported.
>>>>>>>> A solution would be to set acpi_cpu_hook to NULL so acpi_cpu_idle =
won't call it.
>>>>>>>> I need some time to have a patch because of the possible race betw=
een
>>>>>>>> acpi_cpu_notify and
>>>>>>>> acpi_cpu_idle during set acpi_cpu_hook to NULL.
>>>>>>>> if you have time and want panic your system you could try the atta=
ched
>>>>>>>> patch, just to be
>>>>>>>> sure that we catch it.
>>>>>>>>
>>>>>>>
>>>>>>> Hi, it paniced today ! I don't know why it randomly panic but it di=
d,
>>>>>>> the backtrace didn't change. There is a picture about the panic :
>>>>>>>
>>>>>>> http://img541.imageshack.us/img541/2773/dsc00388xa.jpg
>>>>>>
>>>>>> What was you trying? acpi_idle5.diff.txt patch?
>>>>>> How did it panic? Unplugging AC adapter?
>>>>>>
>>>>>
>>>>> Hi, I tried this one : lvlx.diff.txt. Yes by unplugging the AC adapte=
r.
>>>>>
>>>>
>>>> This is an old one. Could you try acpi_idle5.diff.txt? I kept you in
>>>> Cc when I sent to
>>>> the list. If you have problems, let me know, I'll resend to you =A0the=
patch.
>>>>
>>>> Thank you.
>>>>
>>>
>>> Hi, it panic'ed with the same backtrace.
>>>
>>
>> Can you please post your dmesg?
>>
>
> Sent !
As your PC is in a good mood to make test, :)
could you try this patch?
Thank you
--
Gianni
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