[PATCH 6/13] no aggressive idle balancing

[Nick Piggin]

6/13

Remove the special casing for idle CPU balancing. Things like this are
hurting for example on SMT, where are single sibling being idle doesn't
really warrant a really aggressive pull over the NUMA domain, for example.

Signed-off-by: Nick Piggin <nickpiggin@xxxxxxxxxxxx>

Index: linux-2.6/kernel/sched.c
===================================================================
--- linux-2.6.orig/kernel/sched.c	2005-02-24 17:31:43.537742489 +1100
+++ linux-2.6/kernel/sched.c	2005-02-24 17:43:38.340504724 +1100
@@ -1875,15 +1875,9 @@
 
 	/* Get rid of the scaling factor, rounding down as we divide */
 	*imbalance = *imbalance / SCHED_LOAD_SCALE;
-
 	return busiest;
 
 out_balanced:
-	if (busiest && (idle == NEWLY_IDLE ||
-			(idle == SCHED_IDLE && max_load > SCHED_LOAD_SCALE)) ) {
-		*imbalance = 1;
-		return busiest;
-	}
 
 	*imbalance = 0;
 	return NULL;