path: root/init
diff options
authorSebastian Andrzej Siewior <>2016-11-02 17:30:02 +0100
committerPaul E. McKenney <>2017-01-16 16:56:39 -0800
commit7c6094db591b320332441e5f169156a4255b2180 (patch)
tree6dac53785ec6746f82e720f52ca327d6cea48753 /init
parent52d7e48b86fc108e45a656d8e53e4237993c481d (diff)
rcu: update: Make RCU_EXPEDITE_BOOT be the default
RCU_EXPEDITE_BOOT should speed up the boot process by enforcing synchronize_rcu_expedited() instead of synchronize_rcu() during the boot process. There should be no reason why one does not want this and there is no need worry about real time latency at this point. Therefore make it default. Note that users wishing to avoid expediting entirely, for example when bringing up new hardware possibly having flaky IPIs, can use the rcu_normal boot parameter to override boot-time expediting. Signed-off-by: Sebastian Andrzej Siewior <> [ paulmck: Reworded commit log. ] Signed-off-by: Paul E. McKenney <> Reviewed-by: Josh Triplett <>
Diffstat (limited to 'init')
1 files changed, 0 insertions, 13 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 223b734..96e6d56 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -781,19 +781,6 @@ config RCU_NOCB_CPU_ALL
- bool
- default n
- help
- This option enables expedited grace periods at boot time,
- as if rcu_expedite_gp() had been invoked early in boot.
- The corresponding rcu_unexpedite_gp() is invoked from
- rcu_end_inkernel_boot(), which is intended to be invoked
- at the end of the kernel-only boot sequence, just before
- init is exec'ed.
- Accept the default if unsure.
endmenu # "RCU Subsystem"
config BUILD_BIN2C