linux-kernel - [PATCH 17/19] smart: disable RT runtime sharing

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Date:	Thu,  4 Sep 2014 20:31:03 +0400
From:	klamm@...dex-team.ru
To:	peterz@...radead.org, mingo@...hat.com,
	linux-kernel@...r.kernel.org
Cc:	stfomichev@...dex-team.ru, Roman Gushchin <klamm@...dex-team.ru>
Subject: [PATCH 17/19] smart: disable RT runtime sharing

From: Roman Gushchin <klamm@...dex-team.ru>

This patch disables runtime sharing for rt tasks (RT_RUNTIME_SHARE).
It's necessary to guarantee that CFS tasks (including system threads
like rcu workers) will get time slice regularly on each cpu even when
system is heavily loaded with rt tasks.

Signed-off-by: Roman Gushchin <klamm@...dex-team.ru>
---
 kernel/sched/features.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/features.h b/kernel/sched/features.h
index 99399f8..0945d38 100644
--- a/kernel/sched/features.h
+++ b/kernel/sched/features.h
@@ -57,7 +57,7 @@ SCHED_FEAT(NONTASK_POWER, true)
 SCHED_FEAT(TTWU_QUEUE, true)
 
 SCHED_FEAT(FORCE_SD_OVERLAP, false)
-SCHED_FEAT(RT_RUNTIME_SHARE, true)
+SCHED_FEAT(RT_RUNTIME_SHARE, false)
 SCHED_FEAT(LB_MIN, false)
 
 /*
-- 
1.9.3

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