make -C tools/testing/selftests TARGETS=net/forwarding TEST_PROGS=ipip_hieer_gre.sh TEST_GEN_PROGS="" run_tests
make: Entering directory '/home/virtme/testing-2/tools/testing/selftests'
make[1]: Entering directory '/home/virtme/testing-2/tools/testing/selftests/net/forwarding'
make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory '/home/virtme/testing-2/tools/testing/selftests/net/forwarding'
make[1]: Entering directory '/home/virtme/testing-2/tools/testing/selftests/net/forwarding'
TAP version 13
1..1
# timeout set to 0
# selftests: net/forwarding: ipip_hier_gre.sh
# TEST: ping gre hierarchical                                         [ OK ]
# TEST: ping gre packet size 1800 after MTU change                    [ OK ]
[ 1363.357485] ip (7188) used greatest stack depth: 11648 bytes left
ok 1 selftests: net/forwarding: ipip_hier_gre.sh
make[1]: Leaving directory '/home/virtme/testing-2/tools/testing/selftests/net/forwarding'
make: Leaving directory '/home/virtme/testing-2/tools/testing/selftests'
xx__-> echo $?
0
xx__->