| From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> |
| Date: Fri, 21 Mar 2014 20:19:05 +0100 |
| Subject: rcu: make RCU_BOOST default on RT |
| |
| Since it is no longer invoked from the softirq people run into OOM more |
| often if the priority of the RCU thread is too low. Making boosting |
| default on RT should help in those case and it can be switched off if |
| someone knows better. |
| |
| Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> |
| --- |
| init/Kconfig | 4 ++-- |
| 1 file changed, 2 insertions(+), 2 deletions(-) |
| |
| --- a/init/Kconfig |
| +++ b/init/Kconfig |
| @@ -506,7 +506,7 @@ config TINY_RCU |
| |
| config RCU_EXPERT |
| bool "Make expert-level adjustments to RCU configuration" |
| - default n |
| + default y if PREEMPT_RT_FULL |
| help |
| This option needs to be enabled if you wish to make |
| expert-level adjustments to RCU configuration. By default, |
| @@ -649,7 +649,7 @@ config TREE_RCU_TRACE |
| config RCU_BOOST |
| bool "Enable RCU priority boosting" |
| depends on RT_MUTEXES && PREEMPT_RCU && RCU_EXPERT |
| - default n |
| + default y if PREEMPT_RT_FULL |
| help |
| This option boosts the priority of preempted RCU readers that |
| block the current preemptible RCU grace period for too long. |
