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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-01-20 23:54:59 -0800
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2015-02-26 11:57:27 -0800
commitd2af1ad73e7a22ed3e04374896fee0eb300c05c3 (patch)
treefdd9f18c37dc05750ceabf48c4f26eb0ca02479b /Documentation/kernel-parameters.txt
parentc517d838eb7d07bbe9507871fab3931deccff539 (diff)
documentation: Update rcutree.kthread_prio for grace-period kthread use
Now that the rcutree.kthread_prio kernel boot parameter also controls the priority of the grace-period kthreads, update the documentation to reflect this change. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
-rw-r--r--Documentation/kernel-parameters.txt14
1 files changed, 9 insertions, 5 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index bfcb1a62a7b4..d913e3b4bf0d 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2991,11 +2991,15 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
value is one, and maximum value is HZ.
rcutree.kthread_prio= [KNL,BOOT]
- Set the SCHED_FIFO priority of the RCU
- per-CPU kthreads (rcuc/N). This value is also
- used for the priority of the RCU boost threads
- (rcub/N). Valid values are 1-99 and the default
- is 1 (the least-favored priority).
+ Set the SCHED_FIFO priority of the RCU per-CPU
+ kthreads (rcuc/N). This value is also used for
+ the priority of the RCU boost threads (rcub/N)
+ and for the RCU grace-period kthreads (rcu_bh,
+ rcu_preempt, and rcu_sched). If RCU_BOOST is
+ set, valid values are 1-99 and the default is 1
+ (the least-favored priority). Otherwise, when
+ RCU_BOOST is not set, valid values are 0-99 and
+ the default is zero (non-realtime operation).
rcutree.rcu_nocb_leader_stride= [KNL]
Set the number of NOCB kthread groups, which