From: Gregory Haskins <ghaskins@novell.com>
Date: Fri, 27 Jun 2008 20:29:55 +0000 (-0600)
Subject: sched: terminate newidle balancing once at least one task has moved over
X-Git-Tag: v2.6.27-rc1~1105^2~6
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c4acb2c0669c5c5c9b28e9d02a34b5c67edf7092;p=linux-2.6

sched: terminate newidle balancing once at least one task has moved over

Inspired by Peter Zijlstra.

Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Cc: npiggin@suse.de
Cc: rostedt@goodmis.org
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/kernel/sched.c b/kernel/sched.c
index 677c80b9a6..d99aeabeb7 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3013,6 +3013,10 @@ static int move_tasks(struct rq *this_rq, int this_cpu, struct rq *busiest,
 				max_load_move - total_load_moved,
 				sd, idle, all_pinned, &this_best_prio);
 		class = class->next;
+
+		if (idle == CPU_NEWLY_IDLE && this_rq->nr_running)
+			break;
+
 	} while (class && max_load_move > total_load_moved);
 
 	return total_load_moved > 0;