From: Thomas Gleixner Date: Sun, 28 Oct 2012 13:26:09 +0000 Subject: [PATCH 043/351] rcu: Disable RCU_FAST_NO_HZ on RT Origin: https://git.kernel.org/cgit/linux/kernel/git/rt/linux-stable-rt.git/commit?id=8079abf731bf56879717176964b971cbdf3f1007 This uses a timer_list timer from the irq disabled guts of the idle code. Disable it for now to prevent wreckage. Signed-off-by: Thomas Gleixner --- kernel/rcu/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/rcu/Kconfig b/kernel/rcu/Kconfig index 9210379c0353..644264be90f0 100644 --- a/kernel/rcu/Kconfig +++ b/kernel/rcu/Kconfig @@ -172,7 +172,7 @@ 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 && RCU_EXPERT + depends on NO_HZ_COMMON && SMP && RCU_EXPERT && !PREEMPT_RT_FULL default n help This option permits CPUs to enter dynticks-idle state even if