[patch] optimize activate_task()

[Chen, Kenneth W]

recalc_task_prio() is called from activate_task() to calculate
dynamic priority and interactive credit for the activating task.
For real-time scheduling process, all that dynamic calculation
is thrown away at the end because rt priority is fixed.  Patch
to optimize recalc_task_prio() away for rt processes.


Signed-off-by: Ken Chen <kenneth.w.chen@xxxxxxxxx>


--- ./kernel/sched.c.orig	2005-10-26 10:39:40.594015398 -0700
+++ ./kernel/sched.c	2005-10-26 18:43:12.187410006 -0700
@@ -833,7 +833,8 @@ static void activate_task(task_t *p, run
 	}
 #endif
 
-	p->prio = recalc_task_prio(p, now);
+	if (!rt_task(p))
+		p->prio = recalc_task_prio(p, now);
 
 	/*
 	 * This checks to make sure it's not an uninterruptible task

-
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