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authorClark Williams <clark.williams@gmail.com>2014-09-13 06:21:09 +0400
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-10-29 20:19:41 +0300
commit21871d7eff2c96ae67e18e00adf59d56940e2fcc (patch)
treee1d6d5c5b7e1f3b70715451c1a04f591293fb474 /Documentation/kernel-parameters.txt
parente0775cefb5ede661dbdc0611d7bf3fcd4640005c (diff)
downloadlinux-21871d7eff2c96ae67e18e00adf59d56940e2fcc.tar.xz
rcu: Unify boost and kthread priorities
Rename CONFIG_RCU_BOOST_PRIO to CONFIG_RCU_KTHREAD_PRIO and use this value for both the per-CPU kthreads (rcuc/N) and the rcu boosting threads (rcub/n). Also, create the module_parameter rcutree.kthread_prio to be used on the kernel command line at boot to set a new value (rcutree.kthread_prio=N). Signed-off-by: Clark Williams <clark.williams@gmail.com> [ paulmck: Ported to rcu/dev, applied Paul Bolle and Peter Zijlstra feedback. ] Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'Documentation/kernel-parameters.txt')
-rw-r--r--Documentation/kernel-parameters.txt7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 7dbe5ec9d9cd..6608520e9fa2 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2922,6 +2922,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
quiescent states. Units are jiffies, minimum
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).
+
rcutree.rcu_nocb_leader_stride= [KNL]
Set the number of NOCB kthread groups, which
defaults to the square root of the number of