38 lines
1.5 KiB
Diff
38 lines
1.5 KiB
Diff
From 4f6896ee6bf4db91d7fc81932bf1ca231229040b Mon Sep 17 00:00:00 2001
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Message-Id: <4f6896ee6bf4db91d7fc81932bf1ca231229040b.1601675151.git.zanussi@kernel.org>
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In-Reply-To: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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References: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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Date: Fri, 21 Mar 2014 20:19:05 +0100
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Subject: [PATCH 044/333] rcu: make RCU_BOOST default on RT
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.148-rt64.tar.xz
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Since it is no longer invoked from the softirq people run into OOM more
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often if the priority of the RCU thread is too low. Making boosting
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default on RT should help in those case and it can be switched off if
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someone knows better.
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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kernel/rcu/Kconfig | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/kernel/rcu/Kconfig b/kernel/rcu/Kconfig
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index 644264be90f0..a243a78ff38c 100644
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--- a/kernel/rcu/Kconfig
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+++ b/kernel/rcu/Kconfig
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@@ -190,8 +190,8 @@ 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_FULL
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+ default y if PREEMPT_RT_FULL
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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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--
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2.17.1
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