From: Ingo Molnar <mingo@elte.hu>
Date: Mon, 15 Oct 2007 15:00:01 +0000 (+0200)
Subject: sched: fix sysctl_sched_child_runs_first flag
X-Git-Tag: v3.12-rc1~26303^2~139
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=44142fac3446d08c08c5d717ec11d50a737e8640;p=kernel%2Fkernel-generic.git

sched: fix sysctl_sched_child_runs_first flag

fix the sched_child_runs_first flag: always call into ->task_new()
if we are on the same CPU, as SCHED_OTHER tasks depend on it for
correct initial setup.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Mike Galbraith <efault@gmx.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
---

diff --git a/kernel/sched.c b/kernel/sched.c
index 6c10fa7..2054e55 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1688,10 +1688,8 @@ void fastcall wake_up_new_task(struct task_struct *p, unsigned long clone_flags)
 	else
 		p->sched_class = &fair_sched_class;
 
-	if (!p->sched_class->task_new || !sysctl_sched_child_runs_first ||
-			(clone_flags & CLONE_VM) || task_cpu(p) != this_cpu ||
-			!current->se.on_rq) {
-
+	if (task_cpu(p) != this_cpu || !p->sched_class->task_new ||
+							!current->se.on_rq) {
 		activate_task(rq, p, 0);
 	} else {
 		/*