linux-kernel - [tip:sched/core] sched: Remove NORMALIZED

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Message-ID: <tip-6bc6cf2b61336ed0c55a615eb4c0c8ed5daf3f08@git.kernel.org>
Date:	Thu, 11 Mar 2010 18:32:17 GMT
From:	tip-bot for Mike Galbraith <efault@....de>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	a.p.zijlstra@...llo.nl, efault@....de, tglx@...utronix.de,
	mingo@...e.hu
Subject: [tip:sched/core] sched: Remove NORMALIZED_SLEEPER

Commit-ID:  6bc6cf2b61336ed0c55a615eb4c0c8ed5daf3f08
Gitweb:     http://git.kernel.org/tip/6bc6cf2b61336ed0c55a615eb4c0c8ed5daf3f08
Author:     Mike Galbraith <efault@....de>
AuthorDate: Thu, 11 Mar 2010 17:17:17 +0100
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Thu, 11 Mar 2010 18:32:52 +0100

sched: Remove NORMALIZED_SLEEPER

This feature hasn't been enabled in a long time, remove effectively dead code.

Signed-off-by: Mike Galbraith <efault@....de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
LKML-Reference: <1268301447.6785.38.camel@...ge.simson.net>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 kernel/sched_fair.c     |   10 ----------
 kernel/sched_features.h |    7 -------
 2 files changed, 0 insertions(+), 17 deletions(-)

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 0008cc4..de98e2e 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -742,16 +742,6 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
 		unsigned long thresh = sysctl_sched_latency;
 
 		/*
-		 * Convert the sleeper threshold into virtual time.
-		 * SCHED_IDLE is a special sub-class.  We care about
-		 * fairness only relative to other SCHED_IDLE tasks,
-		 * all of which have the same weight.
-		 */
-		if (sched_feat(NORMALIZED_SLEEPER) && (!entity_is_task(se) ||
-				 task_of(se)->policy != SCHED_IDLE))
-			thresh = calc_delta_fair(thresh, se);
-
-		/*
 		 * Halve their sleep time's effect, to allow
 		 * for a gentler effect of sleepers:
 		 */
diff --git a/kernel/sched_features.h b/kernel/sched_features.h
index c545e04..4042883 100644
--- a/kernel/sched_features.h
+++ b/kernel/sched_features.h
@@ -13,13 +13,6 @@ SCHED_FEAT(FAIR_SLEEPERS, 1)
 SCHED_FEAT(GENTLE_FAIR_SLEEPERS, 1)
 
 /*
- * By not normalizing the sleep time, heavy tasks get an effective
- * longer period, and lighter task an effective shorter period they
- * are considered running.
- */
-SCHED_FEAT(NORMALIZED_SLEEPER, 0)
-
-/*
  * Place new tasks ahead so that they do not starve already running
  * tasks
  */
--
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