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Description of problem:
RHEL 7.6 kernel introduces a new scheduling policy SCHED_DEADLINE.
ps does not convert this policy value to a human readable string and instead prints "#6" for CLS value.


Version-Release number of selected component (if applicable):'
kernel-3.10.0-957.el7.x86_64
procps-ng-3.3.10-23.el7.x86_64

How reproducible:
Every time


Steps to Reproduce:
1. Assign deadline policy to some task

# chrt -d --sched-runtime 1000000 --sched-deadline 5000000 --sched-period 5000000 0 sleep 100&
[1] 20814


2. Check the task in ps:

# ps -efac
UID        PID  PPID CLS PRI STIME TTY          TIME CMD
root     20814 19603 #6  140 10:31 pts/0    00:00:00 sleep 100


Actual results:
UID        PID  PPID CLS PRI STIME TTY          TIME CMD
root     20814 19603 #6  140 10:31 pts/0    00:00:00 sleep 100

Expected results:

In RHEL 8 this works:
UID        PID  PPID CLS PRI STIME TTY          TIME CMD
root     20848 20487 DLN 140 10:00 pts/0    00:00:00 sleep 100000

Additional info:

ps: recognize SCHED_DEADLINE
https://gitlab.com/procps-ng/procps/commit/f8ccf3126e160987141d9991fa9524eda6265ed6

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2019:2189