Frederic Weisbecker <frede...@kernel.org> writes:
>
> Since recalculating the next_expiry isn't a free operation, especially
> when we must climb up the last wheel level to find out that no timer
> has

I'm climbing stairs or mountains :)

> been enqueued at all, lets reuse the next expiry cache when it is
> known

lets? Come on, the changelog is about facts not what we might do.

>       unsigned long           clk;
>       unsigned long           next_expiry;
> +     bool                    next_expiry_recalc;
>       unsigned int            cpu;
>       bool                    is_idle;

Care to stare at the output of

     pahole -C timer_base kernel/time/timer.o

before and after?

Thanks,

        tglx

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