From 4cd54518c3d8afadd11ebd6ad4f03b00859f5e85 Mon Sep 17 00:00:00 2001
From: "Paul E. McKenney" <paulmck@kernel.org>
Date: Thu, 11 Feb 2021 11:54:43 -0800
Subject: [PATCH] torture: Reverse jittering and duration parameters for
 jitter.sh

Remote rcutorture testing requires that jitter.sh continue to be
invoked from the generated script for local runs, but that it instead
be invoked on the remote system for distributed runs.  This argues
for common jitterstart and jitterstop scripts.  But it would be good
for jitterstart and jitterstop to control the name and location of the
"jittering" file, while continuing to have the duration controlled by
the caller of these new scripts.

This commit therefore reverses the order of the jittering and duration
parameters for jitter.sh, so that the jittering parameter precedes the
duration parameter.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
 tools/testing/selftests/rcutorture/bin/jitter.sh | 6 +++---
 tools/testing/selftests/rcutorture/bin/kvm.sh    | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/testing/selftests/rcutorture/bin/jitter.sh b/tools/testing/selftests/rcutorture/bin/jitter.sh
index ed0ea86ddf5d..ff1d3e468e53 100755
--- a/tools/testing/selftests/rcutorture/bin/jitter.sh
+++ b/tools/testing/selftests/rcutorture/bin/jitter.sh
@@ -5,7 +5,7 @@
 # of this script is to inflict random OS jitter on a concurrently running
 # test.
 #
-# Usage: jitter.sh me duration jittering-path [ sleepmax [ spinmax ] ]
+# Usage: jitter.sh me jittering-path duration [ sleepmax [ spinmax ] ]
 #
 # me: Random-number-generator seed salt.
 # duration: Time to run in seconds.
@@ -18,8 +18,8 @@
 # Authors: Paul E. McKenney <paulmck@linux.ibm.com>
 
 me=$(($1 * 1000))
-duration=$2
-jittering=$3
+jittering=$2
+duration=$3
 sleepmax=${4-1000000}
 spinmax=${5-1000}
 
diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh
index de93802c3d00..a2ee3f2fff3c 100755
--- a/tools/testing/selftests/rcutorture/bin/kvm.sh
+++ b/tools/testing/selftests/rcutorture/bin/kvm.sh
@@ -504,7 +504,7 @@ function dump(first, pastlast, batchnum)
 	print "\techo ---- Starting kernels. `date` | tee -a " rd "log";
 	print "\ttouch " rd "jittering"
 	for (j = 0; j < njitter; j++)
-		print "\tjitter.sh " j " " dur " " rd "jittering " ja[2] " " ja[3] "&"
+		print "\tjitter.sh " j " " rd "jittering " dur " " ja[2] " " ja[3] "&"
 	print "\twhile ls $runfiles > /dev/null 2>&1"
 	print "\tdo"
 	print "\t\t:"