[   49.556641] netem: version 1.3
[  510.304552] ip (13483) used greatest stack depth: 12232 bytes left
[  633.469639] tc (21366) used greatest stack depth: 11952 bytes left
[  689.218945] pm_nl_ctl (24503) used greatest stack depth: 11872 bytes left
[  693.333189] kworker/0:0 (8) used greatest stack depth: 11784 bytes left