[    1.519689] ip (247) used greatest stack depth: 12072 bytes left
[    3.543009] ip (736) used greatest stack depth: 11944 bytes left
[   17.544382] ip (1717) used greatest stack depth: 11896 bytes left
[   52.707710] netem: version 1.3
[  520.986253] tc (20916) used greatest stack depth: 11680 bytes left