documentation: Bring rcutorture parameters up to date

This commit changes the documentation of the rcutorture parameters to
better match reality.

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

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 1d6f0459cd7bbe531b7acc2d85722ff62185729e..01b5b68a237a8b7b77f8614a73639963f6ba167f 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -3135,22 +3135,35 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        in a given burst of a callback-flood test.
 
        rcutorture.fqs_duration= [KNL]
-                       Set duration of force_quiescent_state bursts.
+                       Set duration of force_quiescent_state bursts
+                       in microseconds.
 
        rcutorture.fqs_holdoff= [KNL]
-                       Set holdoff time within force_quiescent_state bursts.
+                       Set holdoff time within force_quiescent_state bursts
+                       in microseconds.
 
        rcutorture.fqs_stutter= [KNL]
-                       Set wait time between force_quiescent_state bursts.
+                       Set wait time between force_quiescent_state bursts
+                       in seconds.
+
+       rcutorture.gp_cond= [KNL]
+                       Use conditional/asynchronous update-side
+                       primitives, if available.
 
        rcutorture.gp_exp= [KNL]
-                       Use expedited update-side primitives.
+                       Use expedited update-side primitives, if available.
 
        rcutorture.gp_normal= [KNL]
-                       Use normal (non-expedited) update-side primitives.
-                       If both gp_exp and gp_normal are set, do both.
-                       If neither gp_exp nor gp_normal are set, still
-                       do both.
+                       Use normal (non-expedited) asynchronous
+                       update-side primitives, if available.
+
+       rcutorture.gp_sync= [KNL]
+                       Use normal (non-expedited) synchronous
+                       update-side primitives, if available.  If all
+                       of rcutorture.gp_cond=, rcutorture.gp_exp=,
+                       rcutorture.gp_normal=, and rcutorture.gp_sync=
+                       are zero, rcutorture acts as if is interpreted
+                       they are all non-zero.
 
        rcutorture.n_barrier_cbs= [KNL]
                        Set callbacks/threads for rcu_barrier() testing.
@@ -3177,9 +3190,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        Set time (s) between CPU-hotplug operations, or
                        zero to disable CPU-hotplug testing.
 
-       rcutorture.torture_runnable= [BOOT]
-                       Start rcutorture running at boot time.
-
        rcutorture.shuffle_interval= [KNL]
                        Set task-shuffle interval (s).  Shuffling tasks
                        allows some CPUs to go into dyntick-idle mode
@@ -3220,6 +3230,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        Test RCU's dyntick-idle handling.  See also the
                        rcutorture.shuffle_interval parameter.
 
+       rcutorture.torture_runnable= [BOOT]
+                       Start rcutorture running at boot time.
+
        rcutorture.torture_type= [KNL]
                        Specify the RCU implementation to test.