Hi,

Nice! I've been looking forward to these patches. Should help keep power
consumption down on machines with powersavings support for idle.

On Fri, Sep 07, 2007 at 12:44:46AM +1000, Paul Mackerras wrote:

> @@ -749,6 +805,8 @@ void __init clocksource_init(void)
>       printk(KERN_INFO "clocksource: %s mult[%x] shift[%d] registered\n",
>              clocksource_timebase.name,
>              clocksource_timebase.mult, clocksource_timebase.shift);
> +
> +     init_decrementer_clockevent();
>  }
>  
>  /* This function is only called on the boot processor */
> @@ -874,8 +932,7 @@ void __init time_init(void)
>       /* Register the clocksource */
>       clocksource_init();
>  
> -     /* Not exact, but the timer interrupt takes care of this */
> -     set_dec(tb_ticks_per_jiffy);
> +     set_dec(DECREMENTER_MAX);
>  }

I don't think that set_dec() is needed any more. I get a very long
delay during "Calibrating delay loop..." with it there.

Looks like decrementer_set_next_event() already sets a reasonable
decementer value, it's called through the notify chain set off
from register_decrementer_clockevent() -> ... -> tick_notify() ->
tick_setup_periodic() -> clockevents_program_event().


-Olof
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