As manpage of ps states A process with STATUS with the value D means uninterruptible sleep (usually IO)Also, I've read: You should use TASK_INTERRUPTIBLE here, otherwise your kernelthread cannot receive signals and you are not able to kill(1) your thread fromuserspace or use kthread_stop() in the kernel.If the above is not enough you can read:  process status (STAT) of D indicates that the process is in an uninterruptible sleep state. In real-world terms, this generally means that it's waiting on I/O and can't/won't do anything - including dying - until that I/O operation completes.Let's say I run a process that waits IO:[root@mpinode02 Distros]#  find / -mmin +10 > /dev/null &[1] 15592Then I take a look to the status and wchan process[root@mpinode02 Distros]# ps -C find -ostat,comm,wchanSTAT COMMAND         WCHAND    find            sleep_on_bufferOK, let's see if the process is really uninterrumpible:[root@mpinode02 Distros]# kill 15592[1]+  Terminated               time find / -mmin +10 > /dev/nullSo, as you can see process with D in the real world was killed, is the man page of ps outdated? Indeed I see that there is a new kind of state:  TASK KILLABLE but I want to know hot to list them. Do you know how to list killable tasks or identify them?
How to list killable tasks?
process;kill;signals