[    2.209483] ip (270) used greatest stack depth: 12368 bytes left
[    4.969170] ip (472) used greatest stack depth: 12352 bytes left
[   30.782186] ip (1207) used greatest stack depth: 12168 bytes left
[   53.652695] netem: version 1.3
[  542.185944] ip (10473) used greatest stack depth: 12072 bytes left