From: Con Kolivas <kernel@kolivas.org>
A heck of a lot fairer on disk only tasks; lets them earn sleep avg up to just
interactive state so they stay on the active array.
kernel/sched.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
diff -puN kernel/sched.c~o13.1int kernel/sched.c
--- 25/kernel/sched.c~o13.1int 2003-08-04 17:17:10.000000000 -0700
+++ 25-akpm/kernel/sched.c 2003-08-04 17:17:10.000000000 -0700
@@ -584,13 +584,16 @@ repeat_lock_task:
goto repeat_lock_task;
}
if (old_state == TASK_UNINTERRUPTIBLE){
+ rq->nr_uninterruptible--;
/*
* Tasks on involuntary sleep don't earn
- * sleep_avg
+ * sleep_avg beyond just interactive state.
*/
- rq->nr_uninterruptible--;
- p->timestamp = sched_clock();
- p->activated = -1;
+ if (NS_TO_JIFFIES(p->sleep_avg) >=
+ JUST_INTERACTIVE_SLEEP(p)){
+ p->timestamp = sched_clock();
+ p->activated = -1;
+ }
}
if (sync)
__activate_task(p, rq);
_