[    1.506748] ip (258) used greatest stack depth: 12168 bytes left
[    3.395596] ip (738) used greatest stack depth: 12088 bytes left
[   17.281984] ip (1708) used greatest stack depth: 12008 bytes left
[   52.370990] netem: version 1.3
[  524.421544] tc (20917) used greatest stack depth: 11704 bytes left