[   14.253058][  T261] ip (261) used greatest stack depth: 24688 bytes left
[   15.113589][  T268] gre: GRE over IPv4 demultiplexer driver
[   15.131618][  T268] ip_gre: GRE over IPv4 tunneling driver
[   34.388265][  T509] ip (509) used greatest stack depth: 24664 bytes left
[   55.296477][  T762] ip6_gre: GRE over IPv6 tunneling driver