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 (with CONFIG_RT_GROUP_SCHED=n) fails.

Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Juri Lelli <juri.lelli@gmail.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1392107067-19907-2-git-send-email-juri.lelli@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 2491448..98d33c1 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -7475,7 +7475,8 @@ 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;