On 2026-07-21, C.T.F. Jansen wrote: > iotop and iotop-c don't collect IO wait information anymore unless one "opts > in" by setting up the relevant variable in /etc/default/grub. This is the > wrong way round for running a server.
Which kernel version do you use ? Man page says "kernel.task_delayacct sysctl enabled". You can set it in /etc/sysctl.d/*. If you used /etc/sysctl.conf it could have been removed during procps upgrade.
