Re: acpi_idle and max_cpus

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Hi Daniel,

On 06/18/2012 01:48 AM, Daniel Lezcano wrote:

> On 06/15/2012 05:28 PM, Daniel Lezcano wrote:
>>
>> Hi all,
>>
>> I have a dual core Intel T9500.
>>
>> I boot the cpu with the acpi_idle driver and intel_idle enabled in the
>> config.
>>
>> The kernel is booted with maxcpus=1.
>>
>> After the system has boot, I put cpu1 online via sysfs.
>>
>> But I don't see any 'cpuidle' directory in the cpu's sysfs entry:
>>
>> /sys/devices/system/cpu/cpu1/cpuidle (?)
>>
>> When I look at the code I see the notifier is present for hotplug in
>> processor_driver.c and the cpuidle intel init routine should be called
>> there.
>>


Yes, we have a hotplug notifier.
Commit 99b72508  by Thomas Renninger fixed this issue.

Please let me know which kernel version you are running and what is idle
driver registered ?

>> I am wondering is it a bug or an expected behavior ?
> 
> Any thoughts on that ?
> 
> Thanks
>   -- Daniel
> 
> 


Cheers
Deepthi



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