On Tue, Aug 2, 2016 at 3:22 AM, Steve Muckle <[email protected]> wrote: > On Mon, Aug 01, 2016 at 01:37:23AM +0200, Rafael J. Wysocki wrote: > ... >> For this purpose, define a new cpufreq_update_util() flag >> UUF_IO and modify enqueue_task_fair() to pass that flag to >> cpufreq_update_util() in the in_iowait case. That generally >> requires cpufreq_update_util() to be called directly from there, >> because update_load_avg() is not likely to be invoked in that >> case. > > I didn't follow why the cpufreq hook won't likely be called if > in_iowait is set? AFAICS update_load_avg() gets called in the second loop > and calls update_cfs_rq_load_avg (triggers the hook).
In practice it turns out that in the majority of cases when in_iowait is set the second loop will not run. Thanks, Rafael
