diff --git a/scripts/check_format.sh b/scripts/check_format.sh
index eb7eec120..788c560c7 100755
--- a/scripts/check_format.sh
+++ b/scripts/check_format.sh
@@ -241,7 +241,7 @@ if hash shellcheck 2>/dev/null; then
 	# Error descriptions can also be found at: https://github.com/koalaman/shellcheck/wiki
 	SHCK_EXCLUDE="SC1001,SC1003,SC1004,SC1010,\
 SC1083,SC1090,SC1091,SC1113,SC2001,SC2002,SC2003,SC2004,SC2005,\
-SC2009,SC2010,SC2012,SC2013,SC2015,SC2016,SC2018,SC2019,SC2022,\
+SC2010,SC2012,SC2013,SC2015,SC2016,SC2018,SC2019,SC2022,\
 SC2027,SC2030,SC2031,SC2034,SC2035,SC2039,SC2043,SC2044,SC2045,SC2046,\
 SC2059,SC2068,SC2074,SC2086,SC2088,SC2089,SC2090,SC2091,SC2094,\
 SC2097,SC2098,SC2103,SC2115,SC2116,SC2119,SC2120,SC2121,SC2124,SC2126,SC2128,\
diff --git a/test/vhost/perf_bench/vhost_perf.sh b/test/vhost/perf_bench/vhost_perf.sh
index abe2e677c..2671f1bb5 100755
--- a/test/vhost/perf_bench/vhost_perf.sh
+++ b/test/vhost/perf_bench/vhost_perf.sh
@@ -312,7 +312,7 @@ if [[ -n "$kernel_cpus" ]]; then
 	echo "$kernel_mask" >> /sys/fs/cgroup/cpuset/spdk/cpuset.cpus
 	echo "0-1" >> /sys/fs/cgroup/cpuset/spdk/cpuset.mems
 
-	kernel_vhost_pids=$(ps aux | grep -Po "^root\s+\K(\d+)(?=.*\[vhost-\d+\])")
+	kernel_vhost_pids=$(pgrep "vhost" -U root)
 	for kpid in $kernel_vhost_pids; do
 		echo "Limiting kernel vhost pid ${kpid}"
 		echo "${kpid}" >> /sys/fs/cgroup/cpuset/spdk/tasks