The function nohz_kick_needed modifies NOHZ_IDLE flag that is used to update
the nr_busy_cpus of the sched_group.
When the sched_domain are updated (during the boot or because of the unplug of
a CPUs as an example) a null_domain is attached to CPUs. We have to test
likely(!on_null_domain(cpu)
The function nohz_kick_needed modifies NOHZ_IDLE flag that is used to update
the nr_busy_cpus of the sched_group.
When the sched_domain are updated (during the boot or because of the unplug of
a CPUs as an example) a null_domain is attached to CPUs. We have to test
likely(!on_null_domain(cpu)
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