diff options
Diffstat (limited to 'debian/patches-rt/0044-rcu-make-RCU_BOOST-default-on-RT.patch')
| -rw-r--r-- | debian/patches-rt/0044-rcu-make-RCU_BOOST-default-on-RT.patch | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/debian/patches-rt/0044-rcu-make-RCU_BOOST-default-on-RT.patch b/debian/patches-rt/0044-rcu-make-RCU_BOOST-default-on-RT.patch new file mode 100644 index 000000000..41c8f5cf1 --- /dev/null +++ b/debian/patches-rt/0044-rcu-make-RCU_BOOST-default-on-RT.patch @@ -0,0 +1,34 @@ +From 54dcdf587a5ea4e590122c0666760e151bb3f122 Mon Sep 17 00:00:00 2001 +From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +Date: Fri, 21 Mar 2014 20:19:05 +0100 +Subject: [PATCH 044/347] rcu: make RCU_BOOST default on RT +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz + +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> +--- + kernel/rcu/Kconfig | 4 ++-- + 1 file changed, 2 insertions(+), 2 deletions(-) + +diff --git a/kernel/rcu/Kconfig b/kernel/rcu/Kconfig +index 644264be90f0..a243a78ff38c 100644 +--- a/kernel/rcu/Kconfig ++++ b/kernel/rcu/Kconfig +@@ -190,8 +190,8 @@ config RCU_FAST_NO_HZ + + config RCU_BOOST + bool "Enable RCU priority boosting" +- depends on RT_MUTEXES && PREEMPT_RCU && RCU_EXPERT +- default n ++ depends on (RT_MUTEXES && PREEMPT_RCU && RCU_EXPERT) || PREEMPT_RT_FULL ++ default y if PREEMPT_RT_FULL + help + This option boosts the priority of preempted RCU readers that + block the current preemptible RCU grace period for too long. +-- +2.36.1 + |