The membarrier check is no longer done by the logmonitor.

rootfs/startapp.sh

@@ -5,5 +5,27 @@ set -u # Treat unset variables as an error.
 
 export HOME=/config
 
+PIDS=
+
+notify() {
+    for N in $(ls /etc/logmonitor/targets.d/*/send)
+    do
+       "$N" "$1" "$2" "$3" &
+       PIDS="$PIDS $!"
+    done
+}
+
+# Verify support for membarrier.
+if ! /usr/bin/membarrier_check 2>/dev/null; then
+   notify "$APP_NAME requires the membarrier system call." "$APP_NAME is likely to crash because it requires the membarrier system call.  See the documentation of this Docker container to find out how this system call can be allowed." "WARNING"
+fi
+
+# Wait for all PIDs to terminate.
+set +e
+for PID in "$PIDS"; do
+   wait $PID
+done
+set -e
+
 /usr/bin/firefox --version
 exec /usr/bin/firefox "$@" >> /config/log/firefox/output.log 2>> /config/log/firefox/error.log