From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Mon, 15 Oct 2007 15:00:14 +0000 (+0200)
Subject: sched: disable forced preemption by default
X-Git-Tag: v2.6.24-rc1~1289^2~30
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ce6c131131df442f0d49d064129ecc52d9fe8ca9;p=pandora-kernel.git

sched: disable forced preemption by default

Implement feature bit to disable forced preemption. This way
it can be checked whether a workload is overscheduling or not.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/kernel/sched.c b/kernel/sched.c
index b7dff36c7c8c..0bd8f2c0fb40 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -444,13 +444,15 @@ enum {
 	SCHED_FEAT_START_DEBIT		= 2,
 	SCHED_FEAT_TREE_AVG             = 4,
 	SCHED_FEAT_APPROX_AVG           = 8,
+	SCHED_FEAT_WAKEUP_PREEMPT	= 16,
 };
 
 const_debug unsigned int sysctl_sched_features =
 		SCHED_FEAT_NEW_FAIR_SLEEPERS	*1 |
 		SCHED_FEAT_START_DEBIT		*1 |
 		SCHED_FEAT_TREE_AVG		*0 |
-		SCHED_FEAT_APPROX_AVG		*0;
+		SCHED_FEAT_APPROX_AVG		*0 |
+		SCHED_FEAT_WAKEUP_PREEMPT	*1;
 
 #define sched_feat(x) (sysctl_sched_features & SCHED_FEAT_##x)
 
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