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Bug 2015819

Summary: Conmon sandbox processes run on non-reserved CPUs with workload partitioning
Product: OpenShift Container Platform Reporter: Mario Vázquez <mavazque>
Component: NodeAssignee: Peter Hunt <pehunt>
Node sub component: CRI-O QA Contact: Sunil Choudhary <schoudha>
Status: CLOSED ERRATA Docs Contact:
Severity: medium    
Priority: unspecified CC: alosadag, aos-bugs, bzhai, cback, dornelas, dwalsh, igreen, kkarampo, miabbott, pehunt, tsweeney
Version: 4.8   
Target Milestone: ---   
Target Release: 4.10.0   
Hardware: Unspecified   
OS: Unspecified   
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Last Closed: 2022-03-10 16:21:06 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Mario Vázquez 2021-10-20 07:50:47 UTC 
Description of problem:
We are seeing conmon sandbox processes running on CPUs outside of the reserved CPUs configured by workload partitioning and PAO.



Version-Release number of selected component (if applicable):
4.8.14

How reproducible:
Always

Steps to Reproduce:
1. In a cluster with WP and PAO create some pods
2. Access the node and check conmon processes CPU allocation with something like: ps -eaF | grep conmon


Actual results:
Some conmon processes are running on CPUs outside the reserved CPU list.

Expected results:
All conmon processes are running on CPUS in the reserved CPU list.

Additional info:

There is a fix on CRI-O already: https://github.com/cri-o/cri-o/pull/5414

We will need this backported to 4.8.
Comment 17 Sunil Choudhary 2022-02-11 08:43:40 UTC 
Verified on 4.10.0-0.nightly-2022-02-10-161006
Comment 19 errata-xmlrpc 2022-03-10 16:21:06 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 (Moderate: OpenShift Container Platform 4.10.3 security update), 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-2022:0056