linux-kernel - [PATCH v5 2/7] sched: remove SMP cover for runnable variables in cfs

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Date:	Mon,  6 May 2013 09:45:06 +0800
From:	Alex Shi <alex.shi@...el.com>
To:	mingo@...hat.com, peterz@...radead.org, tglx@...utronix.de,
	akpm@...ux-foundation.org, bp@...en8.de, pjt@...gle.com,
	namhyung@...nel.org, efault@....de, morten.rasmussen@....com
Cc:	vincent.guittot@...aro.org, preeti@...ux.vnet.ibm.com,
	viresh.kumar@...aro.org, linux-kernel@...r.kernel.org,
	alex.shi@...el.com, mgorman@...e.de, riel@...hat.com,
	wangyun@...ux.vnet.ibm.com
Subject: [PATCH v5 2/7] sched: remove SMP cover for runnable variables in cfs_rq

The following variables were covered under CONFIG_SMP in struct cfs_rq.
but similar runnable variables work for UP in struct rq and task_group.
like rq->avg, task_group->load_avg.
So move them out, they also can work with UP.

         u64 runnable_load_avg, blocked_load_avg;
         atomic64_t decay_counter, removed_load;
         u64 last_decay;

         u32 tg_runnable_contrib;
         u64 tg_load_contrib;

Signed-off-by: Alex Shi <alex.shi@...el.com>
---
 kernel/sched/sched.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 7f36024f..1a02b90 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -226,7 +226,6 @@ struct cfs_rq {
 	unsigned int nr_spread_over;
 #endif
 
-#ifdef CONFIG_SMP
 	/*
 	 * CFS Load tracking
 	 * Under CFS, load is tracked on a per-entity basis and aggregated up.
@@ -242,6 +241,7 @@ struct cfs_rq {
 	u64 tg_load_contrib;
 #endif /* CONFIG_FAIR_GROUP_SCHED */
 
+#ifdef CONFIG_SMP
 	/*
 	 *   h_load = weight * f(tg)
 	 *
-- 
1.7.12

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