[Query]: tick-sched: can idle_active be false in tick_nohz_idle_exit()?

Hi Guys,

File: kernel/time/tick-sched.c function: tick_nohz_idle_exit()

We are checking here if idle_active is true or not and then do some stuff. But is it possible that idle_active be false here?

The sequence as far as I understood is: idle-loop:

tick_nohz_idle_enter(), i.e. idle_active = true; local_irq_disable()

IDLE . .

wake up due to IPI ??

local_irq_enable() tick_nohz_irq_enter(), i.e. idle_active = false; tick_nohz_irq_exit(), i.e. idle_active = true;

tick_nohz_idle_exit()

How can idle_active be false here?

-- viresh