[PATCH] sched: less aggressive idle balancing

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@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 0 insertions, 6 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index 8b035a8b3c30..f665de34ed82 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1877,15 +1877,9 @@ nextgroup:
 
         /* 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;