[    1.539078] ip (251) used greatest stack depth: 12368 bytes left
[    1.724806] ip (272) used greatest stack depth: 12320 bytes left
[    3.408502] ip (456) used greatest stack depth: 12144 bytes left
[   44.192531] netem: version 1.3
[  548.705883] tc (11917) used greatest stack depth: 11872 bytes left