From 8bc6767acb3236e0345e99cf198168e60e7ae456 Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 9 Nov 2007 22:39:39 +0100
Subject: [PATCH] sched: wakeup preemption fix
wakeup preemption fix: do not make it dependent on p->prio.
Preemption purely depends on ->vruntime.
This improves preemption in mixed-nice-level workloads.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
kernel/sched_fair.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index fbcb426029d0..a3badf52bba2 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -863,10 +863,8 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p)
if (unlikely(se->load.weight != NICE_0_LOAD))
gran = calc_delta_fair(gran, &se->load);
- if (delta > gran) {
- if (p->prio < curr->prio)
- resched_task(curr);
- }
+ if (delta > gran)
+ resched_task(curr);
}
}
--
GitLab