[RFC PATCH 08/13] sched: Some miscallaneous changes in load_balance

[Preeti U Murthy]

Modify certain decisions in load_balance to use the imbalance
amount as calculated by the PJT's metric.

Signed-off-by: Preeti U Murthy <preeti at linux.vnet.ibm.com>
---
 kernel/sched/fair.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index bd7b69d..68a6b1d 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5284,7 +5284,10 @@ more_balance:
 		 * moreover subsequent load balance cycles should correct the
 		 * excess load moved.
 		 */
-		if ((env.flags & LBF_SOME_PINNED) && env.imbalance > 0 &&
+		/*
+		 * The following decision based on PJT's metric
+ 		 */
+		if ((env.flags & LBF_SOME_PINNED) && env.load_imbalance > 0 &&
 				lb_iterations++ < max_lb_iterations) {
 
 			env.dst_rq	 = cpu_rq(env.new_dst_cpu);