[    2.639277] ip (222) used greatest stack depth: 12216 bytes left
[    2.753041] ip (257) used greatest stack depth: 11976 bytes left
[    5.034771] ip (898) used greatest stack depth: 11960 bytes left
[   51.656874] netem: version 1.3
[  509.828041] tc (20917) used greatest stack depth: 11760 bytes left