From 7c6094db591b320332441e5f169156a4255b2180 Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Wed, 2 Nov 2016 17:30:02 +0100 Subject: 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 --- init/Kconfig | 13 ------------- 1 file changed, 13 deletions(-) (limited to 'init/Kconfig') diff --git a/init/Kconfig b/init/Kconfig index 223b734abccd..96e6d56acd50 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -781,19 +781,6 @@ config RCU_NOCB_CPU_ALL endchoice -config RCU_EXPEDITE_BOOT - 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 -- cgit v1.2.3