Re: CONFIG_NO_HZ + CONFIG_CPU_IDLE freeze the system (Was Re: [PATCH] acpi : remove power from acpi_processor_cx structure)

Daniel Lezcano
Tue, 11 Sep 2012 21:27:53 -0000

On 09/11/2012 02:18 AM, John Stultz wrote:
> On 09/10/2012 12:45 PM, Daniel Lezcano wrote:
>> On 09/10/2012 07:14 PM, John Stultz wrote:
>>> In the meantime, I'll try to reproduce on my T61. If you could
send me
>>> your .config, I'd appreciate it.
>> http://pastebin.com/qSxqfdDK
>>
>> The header of the config file shows for a v3.5-rc7 because it is the
>> result of the git-bisect. If you keep this config file for the latest
>> kernel that should reproduce the problem.
>>
>> Let me know if you were able to reproduce the problem.
> Great! With this I was able to quickly reproduce the problem and I think
> I have a fix.
>
> Would you mind testing the following patch? It seems to resolve the
> issue, but I've not yet run it through my test suite to make sure it
> didn't break anything else.
>
> If both your and my testing comes back ok, I'll submit it to Thomas.

Sounds like this solves the problem. Without enough background on timers
in general, I don't have an opinion about the patch itself but I can
confirm the issue is no longer occurring.

Thanks
  -- Daniel

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