Re: [PATCH v5 3/4] sched, psi: Don't account irq time if sched_clock_irqtime is disabled

[Michal Koutný]

On Fri, Nov 08, 2024 at 09:29:03PM GMT, Yafang Shao <laoar.shao@xxxxxxxxx> wrote:
> sched_clock_irqtime may be disabled due to the clock source. When disabled,
> irq_time_read() won't change over time, so there is nothing to account. We
> can save iterating the whole hierarchy on every tick and context switch.
> 
> Signed-off-by: Yafang Shao <laoar.shao@xxxxxxxxx>
> Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
> ---
>  kernel/sched/psi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Reviewed-by: Michal Koutný <mkoutny@xxxxxxxx>

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