[   17.997303] ip (1709) used greatest stack depth: 12040 bytes left
[   29.834834] ip (2268) used greatest stack depth: 11968 bytes left
[   52.160046] netem: version 1.3
[   60.380658] ip (4484) used greatest stack depth: 11960 bytes left
[  520.371894] tc (21102) used greatest stack depth: 11784 bytes left