linux-kernel - Re: [tip:sched/core] sched: Remove AFFINE

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Message-ID: <20100312032333.GA13021@windriver.com>
Date:	Fri, 12 Mar 2010 11:23:33 +0800
From:	Yong Zhang <yong.zhang@...driver.com>
To:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	a.p.zijlstra@...llo.nl, efault@....de, tglx@...utronix.de,
	mingo@...e.hu
Cc:	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:sched/core] sched: Remove AFFINE_WAKEUPS feature

On Thu, Mar 11, 2010 at 06:33:38PM +0000, tip-bot for Mike Galbraith wrote:
> Commit-ID:  beac4c7e4a1cc6d57801f690e5e82fa2c9c245c8
> Gitweb:     http://git.kernel.org/tip/beac4c7e4a1cc6d57801f690e5e82fa2c9c245c8
> Author:     Mike Galbraith <efault@....de>
> AuthorDate: Thu, 11 Mar 2010 17:17:20 +0100
> Committer:  Ingo Molnar <mingo@...e.hu>
> CommitDate: Thu, 11 Mar 2010 18:32:53 +0100
> 
> sched: Remove AFFINE_WAKEUPS feature
> 
> Disabling affine wakeups is too horrible to contemplate.  Remove the feature flag.

AFFINE_WAKEUPS is still left in sched_feature.h

From: Yong Zhang <yong.zhang@...driver.com>
Date: Fri, 12 Mar 2010 11:14:26 +0800
Subject: [PATCH] sched: clean AFFINE_WAKEUPS feature

complementary work to commit beac4c7e4a1cc6d57801f690e5e82fa2c9c245c8

Signed-off-by: Yong Zhang <yong.zhang@...driver.com>
---
 kernel/sched_features.h |    8 --------
 1 files changed, 0 insertions(+), 8 deletions(-)

diff --git a/kernel/sched_features.h b/kernel/sched_features.h
index 83c66e8..2137ac0 100644
--- a/kernel/sched_features.h
+++ b/kernel/sched_features.h
@@ -17,14 +17,6 @@ SCHED_FEAT(START_DEBIT, 1)
 SCHED_FEAT(WAKEUP_PREEMPT, 1)
 
 /*
- * Based on load and program behaviour, see if it makes sense to place
- * a newly woken task on the same cpu as the task that woke it --
- * improve cache locality. Typically used with SYNC wakeups as
- * generated by pipes and the like, see also SYNC_WAKEUPS.
- */
-SCHED_FEAT(AFFINE_WAKEUPS, 1)
-
-/*
  * Prefer to schedule the task we woke last (assuming it failed
  * wakeup-preemption), since its likely going to consume data we
  * touched, increases cache locality.
-- 
1.6.3.3


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