Suddenly I noticed that "iotop" fails to produce adequate information:

Total DISK READ :       0.00 B/s | Total DISK WRITE :      18.63 K/s
Actual DISK READ:       0.00 B/s | Actual DISK WRITE:      23.29 K/s
  TID  PRIO  USER     DISK READ  DISK WRITE  SWAPIN     IO>    COMMAND          
  653 be/3 root        0.00 B/s    2.33 K/s  ?unavailable?  [jbd2/nvme0n1p5-]
 1287 be/3 root        0.00 B/s    8.15 K/s  ?unavailable?  [jbd2/sdc5-8]
 8764 be/4 cer         0.00 B/s    3.49 K/s  ?unavailable?  firefox
--sm-client-id 29~dd20a571983d [Cache2 I/O]
 9660 be/4 cer         0.00 B/s    4.66 K/s  ?unavailable?  firefox
--sm-client-id 29~-dd20a571983d [LS Thread]


...


CONFIG_TASK_DELAY_ACCT not enabled in kernel, cannot determine SWAPIN and IO %


I am not sure what update produced this. I know that it worked with 15.3.

Bug ID	1207761
Summary	CONFIG_TASK_DELAY_ACCT not enabled in kernel, cannot determine SWAPIN and IO %
Classification	openSUSE
Product	openSUSE Distribution
Version	Leap 15.4
Hardware	Other
OS	Other
Status	NEW
Severity	Normal
Priority	P5 - None
Component	Kernel
Assignee	kernel-bugs@opensuse.org
Reporter	carlos.e.r@opensuse.org
QA Contact	qa-bugs@suse.de
Found By	---
Blocker	---