Commit 99b61ccf authored Jun 25, 2005 by Nick Piggin Committed by Linus Torvalds Jun 25, 2005

[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>

parent db935dbd

kernel/sched.c

+0 −6

Original line number	Diff line number	Diff line
		@@ -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;