Since kernel 5.14: https://github.com/Tomas-M/iotop/issues/21 The ebuild should mention in pkg_postinst[1]: To enable the SWAPIN/IO columns Edit /etc/default/grub, adding \u201cdelayacct\u201d as an option to the GRUB_CMDLINE_LINUX_DEFAULT entry. If you hadn\u2019t already modified that line, it would go from GRUB_CMDLINE_LINUX_DEFAULT="" to GRUB_CMDLINE_LINUX_DEFAULT="delayacct" commit 9c49d594a5ddea14dcb30f0f2b7dc67018767295 Author: Paul Wise <pabs3@bonedaddy.net> Date: Tue Feb 1 11:31:15 2022 +0800 Automatically hide the SWAPIN/IO columns when they are unavailable Now that the Linux kernel can enable or disable data collection for them at runtime, showing the columns when collection is disabled is even less useful, since the previous data could still be present in the Linux kernel buffers. Preserve the behaviour of the batch mode though, so that programs parsing its output aren't broken by the changes to the Linux kernel, but they may still be broken when the output changes from ?unavailable? to real data. Since the current sorting keys code makes it hard to dynamically choose which columns are shown or hidden, when the two columns are hidden, just skip over displaying them or using them as sorting keys. Rewrite the data display code to be more flexible wrt column choice though. Suggested-by: Boian Bonev <bbonev@ipacct.com> [1] http://blog.brocktice.com/2012/05/23/delayacct-and-iotop-in-ubuntu-10-04-lucid-lynx/
I'm going to create a PR.
Upstream never does releases anymore but later revisions have ways to address this problem. I'm going to work in the original bug on it. *** This bug has been marked as a duplicate of bug 815151 ***
