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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-04-20 21:40:50 +0300
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-05-27 22:59:04 +0300
commita3dc2948cec80f20a89e9b646d0c01b121e48e02 (patch)
tree194400d72447cb60c050a7a572dc00f214934f43 /Documentation/kernel-parameters.txt
parent7fa270010e0ddd3693381431f373b3e3135b0695 (diff)
downloadlinux-a3dc2948cec80f20a89e9b646d0c01b121e48e02.tar.xz
rcu: Enable diagnostic dump of rcu_node combining tree
The purpose of this commit is to make it easier to verify that RCU's combining tree is set up correctly, which is useful to have when making changes in how that tree is initialized. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Pranith Kumar <bobby.prani@gmail.com> [ paulmck: Fold fix found by Fengguang's 0-day test robot. ]
Diffstat (limited to 'Documentation/kernel-parameters.txt')
-rw-r--r--Documentation/kernel-parameters.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index f5582dcdf80d..a1cb88d9864e 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2992,6 +2992,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
Set maximum number of finished RCU callbacks to
process in one batch.
+ rcutree.dump_tree= [KNL]
+ Dump the structure of the rcu_node combining tree
+ out at early boot. This is used for diagnostic
+ purposes, to verify correct tree setup.
+
rcutree.gp_cleanup_delay= [KNL]
Set the number of jiffies to delay each step of
RCU grace-period cleanup. This only has effect