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Subject: rcu: Disable RCU_FAST_NO_HZ on RT
From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 28 Oct 2012 13:26:09 +0000
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.0/older/patches-5.0.10-rt7.tar.xz
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 <tglx@linutronix.de>
---
kernel/rcu/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- 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
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