[   30.210480][  T254] ip (254) used greatest stack depth: 24048 bytes left
[   32.900385][  T280] ip (280) used greatest stack depth: 23872 bytes left
[   60.488142][  T516] netdevsim netdevsim1337: Failed to register fib notifier
[   69.366789][  T603] ip (603) used greatest stack depth: 23680 bytes left
[  113.654372][  T970] netdevsim netdevsim1337: Failed to register fib notifier
[  145.539369][ T1245] netdevsim netdevsim1337: Failed to register fib notifier
[  199.081192][ T1699] netdevsim netdevsim1337: Failed to register fib notifier