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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1772671 Title: Kernel produces empty lines in /proc/PID/status Status in iotop package in Ubuntu: Confirmed Status in linux package in Ubuntu: Incomplete Status in iotop source package in Xenial: Confirmed Status in linux source package in Xenial: Incomplete Bug description: Hello, after running updates today to linux- image-4.4.0-127-generic_4.4.0-127.153 and rebooting i noticed that iotop is not working any more. Reason are empty lines in /proc/PID/status, which confuse iotop (and me) In new view there is an empy line between Seccomp and Speculation_Store_Bypass: #### Seccomp: 0 Speculation_Store_Bypass: vulnerable #### Speculation_Store_Bypass seems to be new in /proc/PID/status, may be a relation to spectre/meltdown patches. iotop is first application which is failing here, but iam afraid of more. Thanks To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/iotop/+bug/1772671/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
