Commit-ID: 78cae10b3a90438689f8cedb66241ce9cff9c214 Gitweb: http://git.kernel.org/tip/78cae10b3a90438689f8cedb66241ce9cff9c214 Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> AuthorDate: Mon, 20 Apr 2015 12:19:45 -0700 Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> CommitDate: Wed, 27 May 2015 12:59:04 -0700 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: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> Reviewed-by: Pranith Kumar <bobby.prani@xxxxxxxxx> --- init/Kconfig | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/init/Kconfig b/init/Kconfig index 0ec8236..7eb4c7b 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -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 -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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