From d2af1ad73e7a22ed3e04374896fee0eb300c05c3 Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Date: Tue, 20 Jan 2015 23:54:59 -0800 Subject: [PATCH] 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> --- 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 bfcb1a62a7b48..d913e3b4bf0d0 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 -- GitLab