diff -up iotop-0.6/iotop.8.gitdd4fcc71 iotop-0.6/iotop.8
--- iotop-0.6/iotop.8.gitdd4fcc71	2013-05-27 00:44:18.000000000 +0200
+++ iotop-0.6/iotop.8	2022-02-15 21:48:24.738610077 +0100
@@ -10,7 +10,8 @@ iotop watches I/O usage information outp
 2.6.20 or later) and displays a table of current I/O usage by processes
 or threads on the system. At least the CONFIG_TASK_DELAY_ACCT,
 CONFIG_TASK_IO_ACCOUNTING, CONFIG_TASKSTATS and CONFIG_VM_EVENT_COUNTERS
-options need to be enabled in your Linux kernel build configuration.
+options need to be enabled in your Linux kernel build configuration and
+since Linux kernel 5.14, the kernel.task_delayacct sysctl enabled.
 .PP
 iotop displays columns for the I/O bandwidth read and written by each
 process/thread during the sampling period. It also displays the percentage
diff -up iotop-0.6/iotop/data.py.gitdd4fcc71 iotop-0.6/iotop/data.py
--- iotop-0.6/iotop/data.py.gitdd4fcc71	2013-05-27 00:44:18.000000000 +0200
+++ iotop-0.6/iotop/data.py	2022-02-15 21:48:24.738610077 +0100
@@ -49,7 +49,7 @@ if not ioaccounting or not vm_event_coun
     if not ioaccounting:
         print('  - I/O accounting support ' \
           '(CONFIG_TASKSTATS, CONFIG_TASK_DELAY_ACCT, ' \
-          'CONFIG_TASK_IO_ACCOUNTING)')
+          'CONFIG_TASK_IO_ACCOUNTING, kernel.task_delayacct sysctl)')
     if not vm_event_counters:
         print('  - VM event counters (CONFIG_VM_EVENT_COUNTERS)')
     sys.exit(1)
diff -up iotop-0.6/iotop/ui.py.gitdd4fcc71 iotop-0.6/iotop/ui.py
--- iotop-0.6/iotop/ui.py.gitdd4fcc71	2022-02-15 21:48:24.738610077 +0100
+++ iotop-0.6/iotop/ui.py	2022-02-15 21:50:55.382602220 +0100
@@ -467,7 +467,9 @@ class IOTopUI(object):
             if Stats.has_blkio_delay_total:
                 status_msg = None
             else:
-                status_msg = ('CONFIG_TASK_DELAY_ACCT not enabled in kernel, '
+                status_msg = ('CONFIG_TASK_DELAY_ACCT '
+                              'and kernel.task_delayacct sysctl '
+                              'not enabled in kernel, '
                               'cannot determine SWAPIN and IO %')
             num_lines = min(len(lines), self.height - 2 - int(bool(status_msg)))
             for i in range(num_lines):
diff -up iotop-0.6/README.gitdd4fcc71 iotop-0.6/README
--- iotop-0.6/README.gitdd4fcc71	2013-05-27 00:44:18.000000000 +0200
+++ iotop-0.6/README	2022-02-15 21:48:24.738610077 +0100
@@ -1,7 +1,8 @@
 Iotop is a Python program with a top like UI used to show of behalf of which
 process is the I/O going on. It requires Python >= 2.7 and a Linux kernel >=
 2.6.20 with the CONFIG_TASK_DELAY_ACCT CONFIG_TASKSTATS,
-CONFIG_TASK_IO_ACCOUNTING and CONFIG_VM_EVENT_COUNTERS options on.
+CONFIG_TASK_IO_ACCOUNTING and CONFIG_VM_EVENT_COUNTERS build options on
+and for Linux kernels since 5.14, the kernel.task_delayacct sysctl enabled.
 
 
 To run a local version of iotop: