Whenever there is at least one non-idle CPU, it is necessary to
periodically update timekeeping information. Before NO_HZ_FULL, this
updating was carried out by the scheduling-clock tick, which ran on
every non-idle CPU. With the advent of NO_HZ_FULL, it is possible
to have non-idle CPUs that
Whenever there is at least one non-idle CPU, it is necessary to
periodically update timekeeping information. Before NO_HZ_FULL, this
updating was carried out by the scheduling-clock tick, which ran on
every non-idle CPU. With the advent of NO_HZ_FULL, it is possible
to have non-idle CPUs that
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