From 7db21edfecb079b2257ced7a2cf2e32ae5e5d966 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Mon, 20 Apr 2015 06:17:15 -0700 Subject: [PATCH] rcu: Directly drive RCU_USER_QS from Kconfig Currently, Kconfig will ask the user whether RCU_USER_QS should be set. This is silly because Kconfig already has all the information that it needs to set this parameter. This commit therefore directly drives the value of RCU_USER_QS via NO_HZ_FULL's "select" statement. Reported-by: Ingo Molnar Signed-off-by: Paul E. McKenney Reviewed-by: Pranith Kumar Acked-by: Frederic Weisbecker --- init/Kconfig | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/init/Kconfig b/init/Kconfig index 73db30a76afa..927210810189 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -529,9 +529,7 @@ config CONTEXT_TRACKING bool config RCU_USER_QS - bool "Consider userspace as in RCU extended quiescent state" - depends on HAVE_CONTEXT_TRACKING && SMP - select CONTEXT_TRACKING + bool help This option sets hooks on kernel / userspace boundaries and puts RCU in extended quiescent state when the CPU runs in @@ -539,12 +537,6 @@ config RCU_USER_QS excluded from the global RCU state machine and thus doesn't try to keep the timer tick on for RCU. - Unless you want to hack and help the development of the full - dynticks mode, you shouldn't enable this option. It also - adds unnecessary overhead. - - If unsure say N - config CONTEXT_TRACKING_FORCE bool "Force context tracking" depends on CONTEXT_TRACKING -- 2.39.5