[    2.581678] ip (234) used greatest stack depth: 12544 bytes left
[    2.604678] ip (243) used greatest stack depth: 12072 bytes left
[    4.363929] ip (724) used greatest stack depth: 12056 bytes left
[   52.061194] netem: version 1.3
[   83.491777] ip (4821) used greatest stack depth: 12024 bytes left
[  540.904327] pm_nl_ctl (24665) used greatest stack depth: 11856 bytes left