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Commit 78cae10b authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcu: Create RCU_EXPERT Kconfig and hide booleans behind it 



This commit creates an RCU_EXPERT Kconfig and hides the independent
boolean RCU-related user-visible Kconfig parameters behind it, namely
RCU_FAST_NO_HZ and RCU_BOOST.  This prevents Kconfig from asking about
these parameters unless the user really wants to be asked.

Reported-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: default avatarPranith Kumar <bobby.prani@gmail.com>
parent a3dc2948

init/Kconfig

+17 −2
Original line number Diff line number Diff line
@@ -501,6 +501,21 @@ config TINY_RCU 


endchoice



config RCU_EXPERT

	bool "Make expert-level adjustments to RCU configuration"

	default n

	help

	  This option needs to be enabled if you wish to make

	  expert-level adjustments to RCU configuration.  By default,

	  no such adjustments can be made, which has the often-beneficial

	  side-effect of preventing "make oldconfig" from asking you all

	  sorts of detailed questions about how you would like numerous

	  obscure RCU options to be set up.



	  Say Y if you need to make expert-level adjustments to RCU.



	  Say N if you are unsure.



config SRCU

	bool

	help
@@ -613,7 +628,7 @@ config RCU_FANOUT_LEAF 


config RCU_FAST_NO_HZ

	bool "Accelerate last non-dyntick-idle CPU's grace periods"

	depends on NO_HZ_COMMON && SMP

	depends on NO_HZ_COMMON && SMP && RCU_EXPERT

	default n

	help

	  This option permits CPUs to enter dynticks-idle state even if
@@ -639,7 +654,7 @@ config TREE_RCU_TRACE 


config RCU_BOOST

	bool "Enable RCU priority boosting"

	depends on RT_MUTEXES && PREEMPT_RCU

	depends on RT_MUTEXES && PREEMPT_RCU && RCU_EXPERT

	default n

	help

	  This option boosts the priority of preempted RCU readers that