[   13.700764] ip (594) used greatest stack depth: 12392 bytes left
[   14.115914] ip (649) used greatest stack depth: 12376 bytes left
[   14.177997] gre: GRE over IPv4 demultiplexer driver
[   14.179363] ip_gre: GRE over IPv4 tunneling driver
[   14.430905] ip (696) used greatest stack depth: 12232 bytes left