Messages in this thread Patch in this message | | | Date | Sat, 15 Jan 2005 15:43:02 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH] [request for inclusion] Realtime LSM |
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* Jack O'Quin <joq@io.com> wrote:
> --- kernel/sched.c~ Fri Dec 24 15:35:24 2004 > +++ kernel/sched.c Wed Jan 12 23:48:49 2005 > @@ -95,7 +95,7 @@ > #define MAX_BONUS (MAX_USER_PRIO * PRIO_BONUS_RATIO / 100) > #define INTERACTIVE_DELTA 2 > #define MAX_SLEEP_AVG (DEF_TIMESLICE * MAX_BONUS) > -#define STARVATION_LIMIT (MAX_SLEEP_AVG) > +#define STARVATION_LIMIT 0 > #define NS_MAX_SLEEP_AVG (JIFFIES_TO_NS(MAX_SLEEP_AVG)) > #define CREDIT_LIMIT 100
could you try the patch below? The above patch wasnt enough. With the patch below we turn off the starvation limits for nice --20 tasks only. This is still a hack only. If we cannot make nice --20 perform like RT-prio-1 then there's some problem with SCHED_OTHER scheduling.
Ingo
--- linux/kernel/sched.c.orig +++ linux/kernel/sched.c @@ -2245,10 +2245,10 @@ EXPORT_PER_CPU_SYMBOL(kstat); * if a better static_prio task has expired: */ #define EXPIRED_STARVING(rq) \ - ((STARVATION_LIMIT && ((rq)->expired_timestamp && \ + ((task_nice(current) > -20) && ((STARVATION_LIMIT && ((rq)->expired_timestamp && \ (jiffies - (rq)->expired_timestamp >= \ STARVATION_LIMIT * ((rq)->nr_running) + 1))) || \ - ((rq)->curr->static_prio > (rq)->best_expired_prio)) + ((rq)->curr->static_prio > (rq)->best_expired_prio))) /* * Do the virtual cpu time signal calculations. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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