Merge branch 'torture.2025.08.14a' into HEAD

Torture-test updates:
* rcutorture: Fix jitter.sh spin time
* torture: Add --do-normal parameter to torture.sh help text
* torture: Announce kernel boot status at torture-test startup
* rcutorture: Suppress "Writer stall state" reports during boot
* rcutorture: Delay rcutorture readers and writers until boot completes
* torture: Delay CPU-hotplug operations until boot completes
* rcutorture: Delay forward-progress testing until boot completes
* rcutorture,refscale: Use kcalloc() instead of kzalloc()
* refperf: Remove redundant kfree() after torture_stop_kthread()
* refperf: Set reader_tasks to NULL after kfree()

2 files changed, 25 insertions, 3 deletions

diff --git a/tools/testing/selftests/rcutorture/bin/jitter.sh b/tools/testing/selftests/rcutorture/bin/jitter.sh
index fd1ffaa5a135..3c1e5d3f8805 100755
--- a/tools/testing/selftests/rcutorture/bin/jitter.sh
+++ b/tools/testing/selftests/rcutorture/bin/jitter.sh
@@ -39,6 +39,22 @@ do
 	fi
 done
 
+# Uses global variables startsecs, startns, endsecs, endns, and limit.
+# Exit code is success for time not yet elapsed and failure otherwise.
+function timecheck {
+	local done=`awk -v limit=$limit \
+			-v startsecs=$startsecs \
+			-v startns=$startns \
+			-v endsecs=$endsecs \
+			-v endns=$endns < /dev/null '
+		BEGIN {
+			delta = (endsecs - startsecs) * 1000 * 1000;
+			delta += int((endns - startns) / 1000);
+			print delta >= limit;
+		}'`
+	return $done
+}
+
 while :
 do
 	# Check for done.
@@ -85,15 +101,20 @@ do
 	n=$(($n+1))
 	sleep .$sleeptime
 
-	# Spin a random duration
+	# Spin a random duration, but with rather coarse granularity.
 	limit=`awk -v me=$me -v n=$n -v spinmax=$spinmax 'BEGIN {
 		srand(n + me + systime());
 		printf("%06d", int(rand() * spinmax));
 	}' < /dev/null`
 	n=$(($n+1))
-	for i in {1..$limit}
+	startsecs=`date +%s`
+	startns=`date +%N`
+	endsecs=$startns
+	endns=$endns
+	while timecheck
 	do
-		echo > /dev/null
+		endsecs=`date +%s`
+		endns=`date +%N`
 	done
 done
 
diff --git a/tools/testing/selftests/rcutorture/bin/torture.sh b/tools/testing/selftests/rcutorture/bin/torture.sh
index 611bc03a8dc7..a33ba109ef0b 100755
--- a/tools/testing/selftests/rcutorture/bin/torture.sh
+++ b/tools/testing/selftests/rcutorture/bin/torture.sh
@@ -94,6 +94,7 @@ usage () {
 	echo "       --do-kvfree / --do-no-kvfree / --no-kvfree"
 	echo "       --do-locktorture / --do-no-locktorture / --no-locktorture"
 	echo "       --do-none"
+	echo "       --do-normal / --do-no-normal / --no-normal"
 	echo "       --do-rcuscale / --do-no-rcuscale / --no-rcuscale"
 	echo "       --do-rcutasksflavors / --do-no-rcutasksflavors / --no-rcutasksflavors"
 	echo "       --do-rcutorture / --do-no-rcutorture / --no-rcutorture"