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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2008-01-25 21:08:32 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-25 21:08:32 +0100
commit1020387f5f3b52929b387103cf976321981f8e26 (patch)
tree201f6c44cc09c57dc936cc804971d37178007687 /kernel/sched_rt.c
parent37bb6cb4097e29ffee970065b74499cbf10603a3 (diff)
downloadlwn-1020387f5f3b52929b387103cf976321981f8e26.tar.gz
lwn-1020387f5f3b52929b387103cf976321981f8e26.zip
sched: rt-group: reduce rescheduling
Only reschedule if the new group has a higher prio task. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched_rt.c')
-rw-r--r--kernel/sched_rt.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index 8bfdb3f8a52d..f1f215db3bd0 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -94,8 +94,11 @@ static void sched_rt_ratio_enqueue(struct rt_rq *rt_rq)
struct sched_rt_entity *rt_se = rt_rq->rt_se;
if (rt_se && !on_rt_rq(rt_se) && rt_rq->rt_nr_running) {
+ struct task_struct *curr = rq_of_rt_rq(rt_rq)->curr;
+
enqueue_rt_entity(rt_se);
- resched_task(rq_of_rt_rq(rt_rq)->curr);
+ if (rt_rq->highest_prio < curr->prio)
+ resched_task(curr);
}
}