From: Mike Galbraith <efault@gmx.de>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ingo Molnar <mingo@elte.hu>, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [patch 7/12] sched: remove NORMALIZED_SLEEPER
Date: Thu, 11 Mar 2010 10:57:27 +0100 [thread overview]
Message-ID: <1268301447.6785.38.camel@marge.simson.net> (raw)
In-Reply-To: <1268300950.6785.27.camel@marge.simson.net>
sched: remove NORMALIZED_SLEEPER
This feature hasn't been enabled in a long time, remove effectively dead code.
Signed-off-by: Mike Galbraith <efault@gmx.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <new-submission>
---
kernel/sched_fair.c | 10 ----------
kernel/sched_features.h | 7 -------
2 files changed, 17 deletions(-)
Index: linux-2.6/kernel/sched_fair.c
===================================================================
--- linux-2.6.orig/kernel/sched_fair.c
+++ linux-2.6/kernel/sched_fair.c
@@ -741,16 +741,6 @@ place_entity(struct cfs_rq *cfs_rq, stru
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:
*/
Index: linux-2.6/kernel/sched_features.h
===================================================================
--- linux-2.6.orig/kernel/sched_features.h
+++ linux-2.6/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
*/
next prev parent reply other threads:[~2010-03-11 9:57 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-11 9:49 [patch 0/12] sched: fastpath cycle recovery Mike Galbraith
2010-03-11 9:50 ` [patch 1/12] sched: ratelimit nohz Mike Galbraith
2010-03-11 18:30 ` [tip:sched/core] sched: Rate-limit nohz tip-bot for Mike Galbraith
2010-03-11 9:51 ` [patch 2/12] sched: remove avg_wakeup Mike Galbraith
2010-03-11 18:30 ` [tip:sched/core] sched: Remove avg_wakeup tip-bot for Mike Galbraith
2010-03-11 9:52 ` [patch 3/12] sched: remove avg_overlap Mike Galbraith
2010-03-11 18:31 ` [tip:sched/core] sched: Remove avg_overlap tip-bot for Mike Galbraith
2010-03-11 9:53 ` [patch 4/12] sched: cleanup/optimize clock updates Mike Galbraith
2010-03-11 18:31 ` [tip:sched/core] sched: Cleanup/optimize " tip-bot for Mike Galbraith
2010-03-11 9:54 ` [patch 5/12] sched: tweak sched_latency and min_granularity Mike Galbraith
2010-03-11 18:31 ` [tip:sched/core] sched: Tweak " tip-bot for Mike Galbraith
2010-03-11 9:56 ` [patch 6/12] sched: fix select_idle_sibling() Mike Galbraith
2010-03-11 18:32 ` [tip:sched/core] sched: Fix select_idle_sibling() tip-bot for Mike Galbraith
2010-03-11 9:57 ` Mike Galbraith [this message]
2010-03-11 18:32 ` [tip:sched/core] sched: Remove NORMALIZED_SLEEPER tip-bot for Mike Galbraith
2010-03-11 9:58 ` [patch 8/12] sched: remove FAIR_SLEEPERS feature Mike Galbraith
2010-03-11 18:32 ` [tip:sched/core] sched: Remove " tip-bot for Mike Galbraith
2010-03-11 9:59 ` [patch 9/12] sched: remove WAKEUP_SYNC feature Mike Galbraith
2010-03-11 18:32 ` [tip:sched/core] sched: Remove " tip-bot for Mike Galbraith
2010-03-11 10:01 ` [patch 11/12] sched: remove ASYM_GRAN feature Mike Galbraith
2010-03-11 18:33 ` [tip:sched/core] sched: Remove " tip-bot for Mike Galbraith
2010-03-11 10:03 ` [patch 10/12] sched: remove SYNC_WAKEUPS feature Mike Galbraith
2010-03-11 18:33 ` [tip:sched/core] sched: Remove " tip-bot for Mike Galbraith
2010-03-11 10:04 ` [patch 12/12] sched: remove AFFINE_WAKEUPS feature Mike Galbraith
2010-03-11 18:33 ` [tip:sched/core] sched: Remove " tip-bot for Mike Galbraith
2010-03-12 3:23 ` Yong Zhang
2010-03-12 4:37 ` Mike Galbraith
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