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Date: Tue, 3 Mar 2015 08:37:35 -0800
From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To: linux-kernel@...r.kernel.org
Cc: mingo@...nel.org, laijs@...fujitsu.com, dipankar@...ibm.com,
akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
dvhart@...ux.intel.com, fweisbec@...il.com, oleg@...hat.com,
bobby.prani@...il.com,
"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: [PATCH tip/core/rcu 1/6] documentation: Update rcutree.kthread_prio for grace-period kthread use
From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
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@...ux.vnet.ibm.com>
---
Documentation/kernel-parameters.txt | 14 +++++++++-----
1 file 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
--
1.8.1.5
--
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