* chen Shang <[email protected]> wrote:
> I minimized my patch and against to 2.6.12-rc4 this time, see below.
looks good - i've done some small style/whitespace cleanups and renamed
prio to old_prio, patch against -rc4 below.
Ingo
From: Chen Shang <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
--- linux/kernel/sched.c.orig
+++ linux/kernel/sched.c
@@ -2613,7 +2613,7 @@ asmlinkage void __sched schedule(void)
struct list_head *queue;
unsigned long long now;
unsigned long run_time;
- int cpu, idx;
+ int cpu, idx, old_prio;
/*
* Test if we are atomic. Since do_exit() needs to call into
@@ -2735,9 +2735,15 @@ go_idle:
delta = delta * (ON_RUNQUEUE_WEIGHT * 128 / 100) / 128;
array = next->array;
- dequeue_task(next, array);
+ old_prio = next->prio;
+
recalc_task_prio(next, next->timestamp + delta);
- enqueue_task(next, array);
+
+ if (unlikely(old_prio != next->prio)) {
+ dequeue_task(next, array);
+ enqueue_task(next, array);
+ } else
+ requeue_task(next, array);
}
next->activated = 0;
switch_tasks:
-
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