v4.7_0472_test2 patch has been released, with the following changes
1. Revert "Immediately select preempt task in deactivate_choose_task().", which is reported introduce lag of mouse pointer moving when idle.
2. Adding quick path in pick_other_cpu_stick_task() when no preemptible rq/cpu or just one preemptible rq/cpu.
Enjoy this new release and feedback will be welcome. :)
It's nice to hear that -test2 fixed issues on -test1, now, base upon -test2, there are debug patches for testing, you can check them out at previous post "debug patches call for testing"