On Fri, May 06, 2016 at 02:58:43PM +0200, Rafael J. Wysocki wrote: > From: Rafael J. Wysocki <rafael.j.wyso...@intel.com> > > Commit 34e2c555f3e1 (cpufreq: Add mechanism for registering utilization > update callbacks) overlooked the fact that update_load_avg(), where > CFS invokes cpufreq utilization update hooks, becomes an empty stub for > CONFIG_SMP unset. In consequence, if CONFIG_SMP is not set, cpufreq > governors are never invoked from CFS and they do not have a chance to > evaluate CPU performace levels and update them often enough. Needless > to say, things don't work as expected then. > > Fix the problem by making the !CONFIG_SMP stub of update_load_avg() > invoke cpufreq update hooks too. > > Fixes: 34e2c555f3e1 (cpufreq: Add mechanism for registering utilization > update callbacks) > Reported-by: Steve Muckle <steve.muc...@linaro.org> > Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Rafael; feel free to push this through the pm tree. Acked-by: Peter Zijlstra (Intel) <pet...@infradead.org>
