Re: [PATCH 07/41] cpuset: Set up interface for nohz flag

[Frederic Weisbecker]

2012/5/7 Christoph Lameter <cl@xxxxxxxxx>:
> On Tue, 1 May 2012, Frederic Weisbecker wrote:
>
>> Prepare the interface to implement the nohz cpuset flag.
>> This flag, once set, will tell the system to try to
>> shutdown the periodic timer tick when possible.
>>
>> We use here a per cpu refcounter. As long as a CPU
>> is contained into at least one cpuset that has the
>> nohz flag set, it is part of the set of CPUs that
>> run into adaptive nohz mode.
>
> As I have said before: It would be much simpler if one could specify the
> set of nohz cpus independently of cpusets. Having a flag f.e. as a file in
>
>        /sys/devices/system/cpu/cpuX/nohz

I don't know if it would be simpler. It's just a different interface
to set a per-CPU property.
Cpusets of sysfs, I don't mind either way.

What is the usual policy on where to put which kind of CPU property?
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