From: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Date: Mon, 8 Dec 2008 15:22:49 +0000 (+0530)
Subject: sched: idle_balance() does not call load_balance_newidle()
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=efbe027e95dc13ac343b6130948418d7ead7ddf1;p=deliverable%2Flinux.git

sched: idle_balance() does not call load_balance_newidle()

Impact: fix SD_BALANCE_NEWIDLEand broaden its use

load_balance_newidle() does not get called if SD_BALANCE_NEWIDLE is
set at higher level domain (3-CPU) and not in low level domain (2-MC).

pulled_task is initialised to -1 and checked for non-zero which is
always true if the lowest level sched_domain does not have
SD_BALANCE_NEWIDLE flag set.

Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/kernel/sched.c b/kernel/sched.c
index 74498c840f93..bb9c6384d077 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3685,7 +3685,7 @@ out_balanced:
 static void idle_balance(int this_cpu, struct rq *this_rq)
 {
 	struct sched_domain *sd;
-	int pulled_task = -1;
+	int pulled_task = 0;
 	unsigned long next_balance = jiffies + HZ;
 	cpumask_t tmpmask;