Bug 1692843 - ps reports numerical CLS value of "#6" for SCHED_DEADLINE policy tasks instead of DLN
Summary: ps reports numerical CLS value of "#6" for SCHED_DEADLINE policy tasks instea...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: procps-ng
Version: 7.6
Hardware: All
OS: All
unspecified
medium
Target Milestone: rc
: ---
Assignee: Jan Rybar
QA Contact: Karel Volný
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2019-03-26 14:35 UTC by nyelle@redhat.com
Modified: 2019-08-06 13:03 UTC (History)
1 user (show)

Fixed In Version: procps-ng-3.3.10-25.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-08-06 13:03:38 UTC
Target Upstream Version:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2019:2189 0 None None None 2019-08-06 13:03:42 UTC

Description nyelle@redhat.com 2019-03-26 14:35:35 UTC
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

Comment 7 errata-xmlrpc 2019-08-06 13:03:38 UTC
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


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