[    2.178371] ip (406) used greatest stack depth: 12200 bytes left
[    2.201681] ip (415) used greatest stack depth: 12168 bytes left
[    2.762701] ip (558) used greatest stack depth: 11928 bytes left
[   52.180299] netem: version 1.3
[  527.496908] tc (20916) used greatest stack depth: 11704 bytes left