[ 1588.397304][ T5136] gre: GRE over IPv4 demultiplexor driver
[ 1588.417875][ T5136] ip_gre: GRE over IPv4 tunneling driver
[ 1588.668178][ T5141] ip (5141) used greatest stack depth: 23520 bytes left
[ 1591.703111][ T5167] ip (5167) used greatest stack depth: 23408 bytes left