diff options
Diffstat (limited to 'debian/patches-rt/0268-rcu-Don-t-allow-to-change-rcu_normal_after_boot-on-R.patch')
| -rw-r--r-- | debian/patches-rt/0268-rcu-Don-t-allow-to-change-rcu_normal_after_boot-on-R.patch | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/debian/patches-rt/0268-rcu-Don-t-allow-to-change-rcu_normal_after_boot-on-R.patch b/debian/patches-rt/0268-rcu-Don-t-allow-to-change-rcu_normal_after_boot-on-R.patch new file mode 100644 index 000000000..3e9b760d5 --- /dev/null +++ b/debian/patches-rt/0268-rcu-Don-t-allow-to-change-rcu_normal_after_boot-on-R.patch @@ -0,0 +1,36 @@ +From c06c2524bbfc1d9e9531a571fb86a03cd7965bd3 Mon Sep 17 00:00:00 2001 +From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +Date: Mon, 24 Jun 2019 18:29:13 +0200 +Subject: [PATCH 268/347] rcu: Don't allow to change rcu_normal_after_boot on + RT +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz + +[ 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> +--- + kernel/rcu/update.c | 2 ++ + 1 file changed, 2 insertions(+) + +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 +-- +2.36.1 + |