[   39.037758][  T311] ip (311) used greatest stack depth: 23664 bytes left
[   39.371861][  T314] ip (314) used greatest stack depth: 23568 bytes left
[  194.296181][ T1176] ip (1176) used greatest stack depth: 23488 bytes left
[ 1339.197433][T10394] blackhole_netdev_xmit(): Dropping skb.
[ 1339.197830][T10394] blackhole_netdev_xmit(): Dropping skb.
[ 1339.198041][T10394] blackhole_netdev_xmit(): Dropping skb.
[ 1339.198257][T10394] blackhole_netdev_xmit(): Dropping skb.