Looking at the linked reports, it sounds like either /dev/network_latency doesn't exist in those systems (which would differ from standard kernel behavior on Ubuntu), or there is a legitimate issue with injecting that device afterwards.
In either case, likely to be a kernel config change or a kernel regression.
Looking at the linked reports, it sounds like either /dev/network_ latency doesn't exist in those systems (which would differ from standard kernel behavior on Ubuntu), or there is a legitimate issue with injecting that device afterwards.
In either case, likely to be a kernel config change or a kernel regression.