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| author | Paul E. McKenney <paulmck@kernel.org> | 2022-05-11 11:49:35 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2022-05-11 11:49:35 -0700 |
| commit | ce13389053a347aa9f8ffbfda2238352536e15c9 (patch) | |
| tree | 1bdfa4c0aeb2038dcee1a7802d2d693359e8aeb4 /kernel/rcu/Kconfig | |
| parent | be05ee54378d451e1d60196921566d6087f3079f (diff) | |
| parent | 9621fbee44df940e2e1b94b0676460a538dffefa (diff) | |
| download | linux-ce13389053a347aa9f8ffbfda2238352536e15c9.tar.bz2 | |
Merge branch 'exp.2022.05.11a' into HEAD
exp.2022.05.11a: Expedited-grace-period latency-reduction updates.
Diffstat (limited to 'kernel/rcu/Kconfig')
| -rw-r--r-- | kernel/rcu/Kconfig | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/kernel/rcu/Kconfig b/kernel/rcu/Kconfig index 65d45c00fd1b..1c630e573548 100644 --- a/kernel/rcu/Kconfig +++ b/kernel/rcu/Kconfig @@ -220,6 +220,20 @@ config RCU_BOOST_DELAY Accept the default if unsure. +config RCU_EXP_KTHREAD + bool "Perform RCU expedited work in a real-time kthread" + depends on RCU_BOOST && RCU_EXPERT + default !PREEMPT_RT && NR_CPUS <= 32 + help + Use this option to further reduce the latencies of expedited + grace periods at the expense of being more disruptive. + + This option is disabled by default on PREEMPT_RT=y kernels which + disable expedited grace periods after boot by unconditionally + setting rcupdate.rcu_normal_after_boot=1. + + Accept the default if unsure. + config RCU_NOCB_CPU bool "Offload RCU callback processing from boot-selected CPUs" depends on TREE_RCU |