[tip: core/rcu] torture: Make torture.sh refuse to do zero-length runs

[tip-bot2 for Paul E. McKenney]

The following commit has been merged into the core/rcu branch of tip:

Commit-ID:     c679d90b21b76319b4a6c719442b6a1ff124b88d
Gitweb:        https://git.kernel.org/tip/c679d90b21b76319b4a6c719442b6a1ff124b88d
Author:        Paul E. McKenney <paulmck@xxxxxxxxxx>
AuthorDate:    Thu, 26 Nov 2020 13:29:24 -08:00
Committer:     Paul E. McKenney <paulmck@xxxxxxxxxx>
CommitterDate: Wed, 06 Jan 2021 17:03:44 -08:00

torture: Make torture.sh refuse to do zero-length runs

This commit causes torture.sh to check for zero-length runs and to take
the cowardly option of refusing to run them, logging its cowardice for
later inspection.

Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
---
 tools/testing/selftests/rcutorture/bin/torture.sh | 25 ++++++++++----
 1 file changed, 19 insertions(+), 6 deletions(-)

diff --git a/tools/testing/selftests/rcutorture/bin/torture.sh b/tools/testing/selftests/rcutorture/bin/torture.sh
index f2f9140..43ef2c0 100755
--- a/tools/testing/selftests/rcutorture/bin/torture.sh
+++ b/tools/testing/selftests/rcutorture/bin/torture.sh
@@ -151,16 +151,29 @@ do
 	shift
 done
 
-duration_rcutorture=$((duration_base*duration_rcutorture_frac/10))
-# Need to sum remaining weights, and if duration weights to zero,
-# set do_no_rcutorture. @@@
-duration_locktorture=$((duration_base*duration_locktorture_frac/10))
-duration_scftorture=$((duration_base*duration_scftorture_frac/10))
-
 T=/tmp/torture.sh.$$
 trap 'rm -rf $T' 0 2
 mkdir $T
 
+duration_rcutorture=$((duration_base*duration_rcutorture_frac/10))
+if test "$duration_rcutorture" -eq 0
+then
+	echo " --- Zero time for rcutorture, disabling" | tee -a $T/log
+	do_rcutorture=no
+fi
+duration_locktorture=$((duration_base*duration_locktorture_frac/10))
+if test "$duration_locktorture" -eq 0
+then
+	echo " --- Zero time for locktorture, disabling" | tee -a $T/log
+	do_locktorture=no
+fi
+duration_scftorture=$((duration_base*duration_scftorture_frac/10))
+if test "$duration_scftorture" -eq 0
+then
+	echo " --- Zero time for scftorture, disabling" | tee -a $T/log
+	do_scftorture=no
+fi
+
 touch $T/failures
 touch $T/successes