linux-kernel - [PATCH] sched/core: fix sched_rt_global

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Date:	Fri, 31 Jan 2014 17:43:27 +0100
From:	Juri Lelli <juri.lelli@...il.com>
To:	peterz@...radead.org
Cc:	mingo@...hat.com, linux-kernel@...r.kernel.org,
	Juri Lelli <juri.lelli@...il.com>
Subject: [PATCH] sched/core: fix sched_rt_global_validate

Don't compare sysctl_sched_rt_runtime against sysctl_sched_rt_period if
the former is equal to RUNTIME_INF, otherwise disabling -rt bandwidth
management always fails.

Cc: Ingo Molnar <mingo@...hat.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Signed-off-by: Juri Lelli <juri.lelli@...il.com>
---
 kernel/sched/core.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 210a12a..5c0a304 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -7477,7 +7477,8 @@ static int sched_rt_global_validate(void)
 	if (sysctl_sched_rt_period <= 0)
 		return -EINVAL;
 
-	if (sysctl_sched_rt_runtime > sysctl_sched_rt_period)
+	if ((sysctl_sched_rt_runtime != RUNTIME_INF) &&
+		(sysctl_sched_rt_runtime > sysctl_sched_rt_period))
 		return -EINVAL;
 
 	return 0;
-- 
1.7.9.5

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