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authorClark Williams <clark.williams@gmail.com>2014-09-12 22:21:09 -0400
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2014-10-29 13:19:41 -0400
commit21871d7eff2c96ae67e18e00adf59d56940e2fcc (patch)
treee1d6d5c5b7e1f3b70715451c1a04f591293fb474 /Documentation
parente0775cefb5ede661dbdc0611d7bf3fcd4640005c (diff)
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')
-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.
2922 quiescent states. Units are jiffies, minimum 2922 quiescent states. Units are jiffies, minimum
2923 value is one, and maximum value is HZ. 2923 value is one, and maximum value is HZ.
2924 2924
2925 rcutree.kthread_prio= [KNL,BOOT]
2926 Set the SCHED_FIFO priority of the RCU
2927 per-CPU kthreads (rcuc/N). This value is also
2928 used for the priority of the RCU boost threads
2929 (rcub/N). Valid values are 1-99 and the default
2930 is 1 (the least-favored priority).
2931
2925 rcutree.rcu_nocb_leader_stride= [KNL] 2932 rcutree.rcu_nocb_leader_stride= [KNL]
2926 Set the number of NOCB kthread groups, which 2933 Set the number of NOCB kthread groups, which
2927 defaults to the square root of the number of 2934 defaults to the square root of the number of