[PATCH] sched,numa: move processes with load difference

[Rik van Riel <riel@redhat.com>]

Currently the numa balancing code refuses to move a task from a
heavily loaded node to a much less heavily loaded node, if the
difference in load between them is large enough.

If the source load is larger than the destination load after the
swap, moving the task is fine. Chances are the load balancer would
move tasks in the same direction, anyway.

Signed-off-by: Rik van Riel <riel@redhat.com>
---
 kernel/sched/fair.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 6d9474c..98a018f 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -1224,10 +1224,6 @@ static void task_numa_compare(struct task_numa_env *env,
 		src_load += load;
 	}
 
-	/* make src_load the smaller */
-	if (dst_load < src_load)
-		swap(dst_load, src_load);
-
 	if (src_load * env->imbalance_pct < dst_load * 100)
 		goto unlock;