On Tue, 18 Feb 2014, Preeti Murthy wrote:
> Hi Thomas,
>
> With regard to the patch: "tick: Clear broadcast pending bit when
> switching to oneshot"
> isn't BROADCAST_EXIT called atleast after initializing the high
> resolution timers while
> handling the broadcast IPI and before re-entering idle? This should
> clear the cpu bit
> in the pending mask right?
>
> idle()
> |__BROADCAST_ENTER
> |__halt()
> |__broadcast_ipi
> |__init_highres()->clear oneshot mask
> |__return from interrupt->BROADCAST_EXIT (clear pending mask)
Unfortunately not:
if (cpumask_test_and_clear_cpu(cpu, tick_broadcast_oneshot_mask)) {
clear pending mask;
}
> |__re-enter idle
Go figure :)
Thanks,
tglx
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