ps aux in an
Ubuntu 18.04 I see some processes having state
I, as in...
root 1 0.0 0.0 225520 9144 ? Ss 10:36 0:02 /sbin/init splash root 2 0.0 0.0 0 0 ? S 10:36 0:00 [kthreadd] root 4 0.0 0.0 0 0 ? I< 10:36 0:00 [kworker/0:0H] root 6 0.0 0.0 0 0 ? I< 10:36 0:00 [mm_percpu_wq]
However this state is not mentioned in
PROCESS STATE CODES Here are the different values that the s, stat and state output specifiers (header "STAT" or "S") will display to describe the state of a process:
D uninterruptible sleep (usually IO) R running or runnable (on run queue) S interruptible sleep (waiting for an event to complete) T stopped by job control signal t stopped by debugger during the tracing W paging (not valid since the 2.6.xx kernel) X dead (should never be seen) Z defunct ("zombie") process, terminated but not reaped by its parent For BSD formats and when the stat keyword is used, additional characters may be displayed: < high-priority (not nice to other users) N low-priority (nice to other users) L has pages locked into memory (for real-time and custom IO) s is a session leader l is multi-threaded (using CLONE_THREAD, like NPTL pthreads do) + is in the foreground process group
What is this