The patch titled
sched: optimize activate_task for RT task
has been removed from the -mm tree. Its filename was
sched-optimize-activate_task-for-rt-task.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: sched: optimize activate_task for RT task
From: "Chen, Kenneth W" <kenneth.w.chen@xxxxxxxxx>
RT task does not participate in interactiveness priority and thus shouldn't
be bothered with timestamp and p->sleep_type manipulation when task is
being put on run queue. Bypass all of the them with a single if (rt_task)
test.
Signed-off-by: Ken Chen <kenneth.w.chen@xxxxxxxxx>
Acked-by: Ingo Molnar <mingo@xxxxxxx>
Cc: Nick Piggin <nickpiggin@xxxxxxxxxxxx>
Cc: "Siddha, Suresh B" <suresh.b.siddha@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
kernel/sched.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff -puN kernel/sched.c~sched-optimize-activate_task-for-rt-task kernel/sched.c
--- a/kernel/sched.c~sched-optimize-activate_task-for-rt-task
+++ a/kernel/sched.c
@@ -940,6 +940,9 @@ static void activate_task(struct task_st
{
unsigned long long now;
+ if (rt_task(p))
+ goto out;
+
now = sched_clock();
#ifdef CONFIG_SMP
if (!local) {
@@ -961,8 +964,7 @@ static void activate_task(struct task_st
(now - p->timestamp) >> 20);
}
- if (!rt_task(p))
- p->prio = recalc_task_prio(p, now);
+ p->prio = recalc_task_prio(p, now);
/*
* This checks to make sure it's not an uninterruptible task
@@ -987,7 +989,7 @@ static void activate_task(struct task_st
}
}
p->timestamp = now;
-
+out:
__activate_task(p, rq);
}
_
Patches currently in -mm which might be from kenneth.w.chen@xxxxxxxxx are
origin.patch
optimize-o_direct-on-block-device-v3.patch
optimize-o_direct-on-block-device-v3-tweak.patch
mm-only-sched-add-a-few-scheduler-event-counters.patch
-
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