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Subject[PATCH tip/core/rcu 02/22] rcu: Four-level hierarchy is no longer experimental
From: "Paul E. McKenney" <>

Time to make the four-level-hierarchy setting less scary, so this
commit removes "Experimental" from the boot-time message. Leave the
message in order to get a heads-up on any possible need to expand to
a five-level hierarchy.

Signed-off-by: Paul E. McKenney <>
kernel/rcutree_plugin.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index 1f27554..61aab6f 100644
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -68,7 +68,7 @@ static void __init rcu_bootup_announce_oddness(void)
printk(KERN_INFO "\tAdditional per-CPU info printed with stalls.\n");
#if NUM_RCU_LVL_4 != 0
- printk(KERN_INFO "\tExperimental four-level hierarchy is enabled.\n");
+ printk(KERN_INFO "\tFour-level hierarchy is enabled.\n");
if (rcu_fanout_leaf != CONFIG_RCU_FANOUT_LEAF)
printk(KERN_INFO "\tExperimental boot-time adjustment of leaf fanout to %d.\n", rcu_fanout_leaf);

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