rcu: Document kernel command-line parameters

Bring RCU's kernel command-line parameter documentation up to date.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

1 files changed, 85 insertions, 3 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index c1601e5a8b71..ab84a01c8d68 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -2330,18 +2330,100 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
         ramdisk_size=   [RAM] Sizes of RAM disks in kilobytes
                         See Documentation/blockdev/ramdisk.txt.
 
-        rcupdate.blimit=        [KNL,BOOT]
+        rcutree.blimit= [KNL,BOOT]
                         Set maximum number of finished RCU callbacks to process
                         in one batch.
 
-        rcupdate.qhimark=       [KNL,BOOT]
+        rcutree.qhimark=        [KNL,BOOT]
                         Set threshold of queued
                         RCU callbacks over which batch limiting is disabled.
 
-        rcupdate.qlowmark=      [KNL,BOOT]
+        rcutree.qlowmark=       [KNL,BOOT]
                         Set threshold of queued RCU callbacks below which
                         batch limiting is re-enabled.
 
+        rcutree.rcu_cpu_stall_suppress= [KNL,BOOT]
+                        Suppress RCU CPU stall warning messages.
+
+        rcutree.rcu_cpu_stall_timeout= [KNL,BOOT]
+                        Set timeout for RCU CPU stall warning messages.
+
+        rcutorture.fqs_duration= [KNL,BOOT]
+                        Set duration of force_quiescent_state bursts.
+
+        rcutorture.fqs_holdoff= [KNL,BOOT]
+                        Set holdoff time within force_quiescent_state bursts.
+
+        rcutorture.fqs_stutter= [KNL,BOOT]
+                        Set wait time between force_quiescent_state bursts.
+
+        rcutorture.irqreader= [KNL,BOOT]
+                        Test RCU readers from irq handlers.
+
+        rcutorture.n_barrier_cbs= [KNL,BOOT]
+                        Set callbacks/threads for rcu_barrier() testing.
+
+        rcutorture.nfakewriters= [KNL,BOOT]
+                        Set number of concurrent RCU writers.  These just
+                        stress RCU, they don't participate in the actual
+                        test, hence the "fake".
+
+        rcutorture.nreaders= [KNL,BOOT]
+                        Set number of RCU readers.
+
+        rcutorture.onoff_holdoff= [KNL,BOOT]
+                        Set time (s) after boot for CPU-hotplug testing.
+
+        rcutorture.onoff_interval= [KNL,BOOT]
+                        Set time (s) between CPU-hotplug operations, or
+                        zero to disable CPU-hotplug testing.
+
+        rcutorture.shuffle_interval= [KNL,BOOT]
+                        Set task-shuffle interval (s).  Shuffling tasks
+                        allows some CPUs to go into dyntick-idle mode
+                        during the rcutorture test.
+
+        rcutorture.shutdown_secs= [KNL,BOOT]
+                        Set time (s) after boot system shutdown.  This
+                        is useful for hands-off automated testing.
+
+        rcutorture.stall_cpu= [KNL,BOOT]
+                        Duration of CPU stall (s) to test RCU CPU stall
+                        warnings, zero to disable.
+
+        rcutorture.stall_cpu_holdoff= [KNL,BOOT]
+                        Time to wait (s) after boot before inducing stall.
+
+        rcutorture.stat_interval= [KNL,BOOT]
+                        Time (s) between statistics printk()s.
+
+        rcutorture.stutter= [KNL,BOOT]
+                        Time (s) to stutter testing, for example, specifying
+                        five seconds causes the test to run for five seconds,
+                        wait for five seconds, and so on.  This tests RCU's
+                        ability to transition abruptly to and from idle.
+
+        rcutorture.test_boost= [KNL,BOOT]
+                        Test RCU priority boosting?  0=no, 1=maybe, 2=yes.
+                        "Maybe" means test if the RCU implementation
+                        under test support RCU priority boosting.
+
+        rcutorture.test_boost_duration= [KNL,BOOT]
+                        Duration (s) of each individual boost test.
+
+        rcutorture.test_boost_interval= [KNL,BOOT]
+                        Interval (s) between each boost test.
+
+        rcutorture.test_no_idle_hz= [KNL,BOOT]
+                        Test RCU's dyntick-idle handling.  See also the
+                        rcutorture.shuffle_interval parameter.
+
+        rcutorture.torture_type= [KNL,BOOT]
+                        Specify the RCU implementation to test.
+
+        rcutorture.verbose= [KNL,BOOT]
+                        Enable additional printk() statements.
+
         rdinit=         [KNL]
                         Format: <full_path>
                         Run specified binary instead of /init from the ramdisk,