[RFC PATCH 8/8] cgroup/cpuset: Update test_cpuset_prs.sh to handle cpuset.cpus.isolation_full

[Waiman Long]

Add a new "-F" option to cpuset.cpus.isolation_full to enable
cpuset.cpus.isolation_full for trying out the effect of enabling
full CPU isolation.

Signed-off-by: Waiman Long <longman@xxxxxxxxxx>
---
 .../selftests/cgroup/test_cpuset_prs.sh       | 23 ++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/cgroup/test_cpuset_prs.sh b/tools/testing/selftests/cgroup/test_cpuset_prs.sh
index b5eb1be2248c..2a8f0cb8d252 100755
--- a/tools/testing/selftests/cgroup/test_cpuset_prs.sh
+++ b/tools/testing/selftests/cgroup/test_cpuset_prs.sh
@@ -32,6 +32,7 @@ NR_CPUS=$(lscpu | grep "^CPU(s):" | sed -e "s/.*:[[:space:]]*//")
 PROG=$1
 VERBOSE=0
 DELAY_FACTOR=1
+ISOLATION_FULL=
 SCHED_DEBUG=
 while [[ "$1" = -* ]]
 do
@@ -44,7 +45,10 @@ do
 		-d) DELAY_FACTOR=$2
 		    shift
 		    ;;
-		*)  echo "Usage: $PROG [-v] [-d <delay-factor>"
+		-F) ISOLATION_FULL=1
+		    shift
+		    ;;
+		*)  echo "Usage: $PROG [-v] [-d <delay-factor>] [-F]"
 		    exit
 		    ;;
 	esac
@@ -108,6 +112,22 @@ console_msg()
 	pause 0.01
 }
 
+setup_isolation_full()
+{
+	ISOL_FULL=${CGROUP2}/cpuset.cpus.isolation_full
+	if [[ -n "$ISOLATION_FULL" ]]
+	then
+		echo 1 > $ISOL_FULL
+		set -- $(cat $ISOL_FULL)
+		ISOLATION_FLAGS=$2
+		[[ $VERBOSE -gt 0 ]] && {
+			echo "Full CPU isolation flags: $ISOLATION_FLAGS"
+		}
+	else
+		echo 0 > $ISOL_FULL
+	fi
+}
+
 test_partition()
 {
 	EXPECTED_VAL=$1
@@ -930,6 +950,7 @@ test_inotify()
 }
 
 trap cleanup 0 2 3 6
+setup_isolation_full
 run_state_test TEST_MATRIX
 test_isolated
 test_inotify
-- 
2.39.3