On Tue, 2006-02-28 at 16:05 +0100, Martin Andersson wrote:
> >On Tue, 2006-02-28 at 11:33 +0100, Martin Andersson wrote:
> >>The appended patch fixes the problem mentioned in
> >>http://lkml.org/lkml/2006/2/27/104
> >>regarding wrong truncations in the calculation of task interactivity
> >>when the nice value is negative. The problem causes the interactivity to
> >>scale nonlinearly and differ from examples in the code.
>
> Hi Mike,
>
> Point taken. Is it correct now?
Looks perfect to me.
-Mike
>
> /Martin
>
> Signed-off-by: Martin Andersson <[email protected]>
>
> diff -uprN linux-2.6.15.4.orig/kernel/sched.c linux-2.6.15.4/kernel/sched.c
> --- linux-2.6.15.4.orig/kernel/sched.c 2006-02-10 08:22:48.000000000 +0100
> +++ linux-2.6.15.4/kernel/sched.c 2006-02-28 15:49:12.000000000 +0100
> @@ -142,7 +142,8 @@
> (v1) * (v2_max) / (v1_max)
>
> #define DELTA(p) \
> - (SCALE(TASK_NICE(p), 40, MAX_BONUS) + INTERACTIVE_DELTA)
> + (SCALE(TASK_NICE(p) + 20, 40, MAX_BONUS) - 20 * MAX_BONUS / 40 + \
> + INTERACTIVE_DELTA)
>
> #define TASK_INTERACTIVE(p) \
> ((p)->prio <= (p)->static_prio - DELTA(p))
>
-
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