It isn't guaranteed a CPU will idle upon calling lpm_cpuidle_enter(),
since it could abort early at the need_resched() check. In this case,
it's possible for an IPI to be sent to this "idle" CPU needlessly, thus
wasting power. For the same reason, it's also wasteful to keep a CPU
marked idle even after it's woken up.
Reduce the window that CPUs are marked idle to as small as it can be in
order to improve power consumption.
Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>
Signed-off-by: Ruchit <ruchitmarathe@gmail.com>
Sultan Alsawaf