A colleague tried installing a later 4.4.0 kernel, 4.4.0-129 from http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.129/ (as below) on 16.04.4 LTS and we then don't see the iotop problem.
Linux version 4.4.129-0404129-generic (kernel@kathleen) (gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.9) ) #201804240833 SMP Tue Apr 24 08:35:28 UTC 2018 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1772671 Title: Kernel produces empty lines in /proc/PID/status To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/iotop/+bug/1772671/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
