[    2.021599] ip (259) used greatest stack depth: 12392 bytes left
[    2.310351] ip (278) used greatest stack depth: 12360 bytes left
[    2.414773] ip (287) used greatest stack depth: 12344 bytes left
[   53.523184] netem: version 1.3
[  467.905199] ip (8647) used greatest stack depth: 12160 bytes left