rcu: make RCU_BOOST default on RT
Since it is no longer invoked from the softirq people run into OOM more often if the priority of the RCU thread is too low. Making boosting default on RT should help in those case and it can be switched off if someone knows better. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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@ -161,8 +161,8 @@ config RCU_FAST_NO_HZ
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config RCU_BOOST
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bool "Enable RCU priority boosting"
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depends on RT_MUTEXES && PREEMPT_RCU && RCU_EXPERT
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default n
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depends on (RT_MUTEXES && PREEMPT_RCU && RCU_EXPERT) || PREEMPT_RT
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default y if PREEMPT_RT
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help
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This option boosts the priority of preempted RCU readers that
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block the current preemptible RCU grace period for too long.
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