| From: |
| Nick Piggin <nickpiggin@yahoo.com.au> |
| To: |
| Andrew Morton <akpm@osdl.org> |
| Subject: |
| [PATCH 6/13] no aggressive idle balancing |
| Date: |
| Thu, 24 Feb 2005 18:21:40 +1100 |
| Cc: |
| linux-kernel@vger.kernel.org |
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@yahoo.com.au>
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;