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Date: Tue, 9 Apr 2013 16:22:13 -0700
From: Jacob Pan <jacob.jun.pan@linux.intel.com>
To: Joe Perches <joe@perches.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
        Platform Driver <platform-driver-x86@vger.kernel.org>,
        Matthew Garrett <matthew.garrett@nebula.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Zhang Rui <rui.zhang@intel.com>,
        Rafael Wysocki <rafael.j.wysocki@intel.com>,
        Len Brown <len.brown@intel.com>,
        Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
        Arjan van de Ven <arjan@linux.intel.com>
Subject: Re: [PATCH v3 1/1] Introduce Intel RAPL cooling device driver
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On Tue, 09 Apr 2013 09:00:37 -0700
Joe Perches <joe@perches.com> wrote:

> > +static int start_periodic_polling(void)
> > +{
> > +	if (polling_started)
> > +		goto out;
> > +	schedule_delayed_work(&rapl_polling_work, 0);
> > +	polling_started = true;  
> 
> Should polling_started be device specific (in struct rapl_data ?)
> instead of a single instance static?
hmmm, one of the future improvements is to add support for multi
package CPUs. I intend to use rapl_data for per package common data
across different domains but use a single polling thread to reduce
wakeups if we were to poll on multiple packages. So in that sense, I
want to keep the polling_started flag as a single instance within the
driver.

-- 
Thanks,

Jacob