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-rw-r--r--Documentation/admin-guide/kernel-parameters.txt9
1 files changed, 8 insertions, 1 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index aa96e669bcb8..6153fb62abe1 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3595,7 +3595,14 @@
Set required age in jiffies for a
given grace period before RCU starts
soliciting quiescent-state help from
- rcu_note_context_switch().
+ rcu_note_context_switch(). If not specified, the
+ kernel will calculate a value based on the most
+ recent settings of rcutree.jiffies_till_first_fqs
+ and rcutree.jiffies_till_next_fqs.
+ This calculated value may be viewed in
+ rcutree.jiffies_to_sched_qs. Any attempt to
+ set rcutree.jiffies_to_sched_qs will be
+ cheerfully overwritten.
rcutree.jiffies_till_first_fqs= [KNL]
Set delay from grace-period initialization to