From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Fri, 27 Jun 2008 11:41:33 +0000 (+0200)
Subject: sched: disable source/target_load bias
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=93b75217df39e6d75889cc6f8050343286aff4a5;p=linux-beck.git

sched: disable source/target_load bias

The bias given by source/target_load functions can be very large, disable
it by default to get faster convergence.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Cc: Mike Galbraith <efault@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/kernel/sched.c b/kernel/sched.c
index 10d43f5bf0fc..6c5eb3bc37e0 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2000,7 +2000,7 @@ static unsigned long source_load(int cpu, int type)
 	struct rq *rq = cpu_rq(cpu);
 	unsigned long total = weighted_cpuload(cpu);
 
-	if (type == 0)
+	if (type == 0 || !sched_feat(LB_BIAS))
 		return total;
 
 	return min(rq->cpu_load[type-1], total);
@@ -2015,7 +2015,7 @@ static unsigned long target_load(int cpu, int type)
 	struct rq *rq = cpu_rq(cpu);
 	unsigned long total = weighted_cpuload(cpu);
 
-	if (type == 0)
+	if (type == 0 || !sched_feat(LB_BIAS))
 		return total;
 
 	return max(rq->cpu_load[type-1], total);
diff --git a/kernel/sched_features.h b/kernel/sched_features.h
index 04123af2e678..d56e3053e746 100644
--- a/kernel/sched_features.h
+++ b/kernel/sched_features.h
@@ -8,3 +8,4 @@ SCHED_FEAT(SYNC_WAKEUPS, 1)
 SCHED_FEAT(HRTICK, 1)
 SCHED_FEAT(DOUBLE_TICK, 0)
 SCHED_FEAT(ASYM_GRAN, 1)
+SCHED_FEAT(LB_BIAS, 0)
\ No newline at end of file