diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2019-06-24 18:29:13 +0200 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2019-07-23 14:57:13 -0400 |
| commit | f711db210b782335acc40e46a423b5533216c28c (patch) | |
| tree | b40e1b11ad12ec3f4c1c7753fadc65a0752073ce | |
| parent | b88b2863c36849e0defc0692816c34ceffeda384 (diff) | |
rcu: Don't allow to change rcu_normal_after_boot on RT
[ Upstream commit c6c058c10577815a2491ce661876cff00a4c3b15 ]
On RT rcu_normal_after_boot is enabled by default.
Don't allow to disable it on RT because the "expedited rcu" would
introduce latency spikes.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
| -rw-r--r-- | kernel/rcu/update.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c index 16d8dba23329..ed75addd3ccd 100644 --- a/kernel/rcu/update.c +++ b/kernel/rcu/update.c @@ -69,7 +69,9 @@ module_param(rcu_expedited, int, 0); extern int rcu_normal; /* from sysctl */ module_param(rcu_normal, int, 0); static int rcu_normal_after_boot = IS_ENABLED(CONFIG_PREEMPT_RT_FULL); +#ifndef CONFIG_PREEMPT_RT_FULL module_param(rcu_normal_after_boot, int, 0); +#endif #endif /* #ifndef CONFIG_TINY_RCU */ #ifdef CONFIG_DEBUG_LOCK_ALLOC |