Re: acpi_idle and max_cpus

[Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>]

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.
> 
> I am wondering is it a bug or an expected behavior ?

Any thoughts on that ?

Thanks
  -- Daniel


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