[    1.771436] ip (251) used greatest stack depth: 12912 bytes left
[    1.838611] ip (256) used greatest stack depth: 12368 bytes left
[    2.128026] ip (281) used greatest stack depth: 12320 bytes left
[   21.885915] ip (1118) used greatest stack depth: 12160 bytes left
[   48.023263] netem: version 1.3
[  610.031163] ip (13872) used greatest stack depth: 12000 bytes left