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Description of problem:
s2kb function is not compatible with python3.

Version-Release number of selected component (if applicable):
tuned-2.10.0-15.el8

How reproducible:
Always

Steps to Reproduce:
1. Create Tuned profile (e.g. my-profile) with the following content:
[sysctl]
kernel.sched_migration_cost_ns=${f:s2kb:50}
2. Activate it, e.g.:
# tuned-adm profile my-profile
3. sysctl kernel.sched_migration_cost_ns

Actual results:
!25

Expected results:
25

Additional info:

Fixed by the following upstream commit:
https://github.com/redhat-performance/tuned/commit/18118c28149f073dd81d63b3cdf9e5f21e12e1e5

Info for QE:

This bug was appeared also in test case:
/CoreOS/tuned/Sanity/built-in-support-for-unit-conversion
in task "Function s2kb"

Test case should work with a bug fix.

QA_ACK+ RHEL8.1

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/RHBA-2019:3633