Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.

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RHEL 9.3.0 / CentOS clone

+++ This bug was initially created as a clone of Bug #2214884 +++

Description of problem:
Under ocp4.13/ocp-v 4.13.1-188 env, the real time worker node is installed with RHCOS based on RHEL9.2, it's found "# Max Latencies: 00090 00096 00141" when run 1 hour cyclictest, while a maximum of 50us is acceptable. From Marcelo, it's caused by "query-stats QMP command interrupts vcpus.", "[PATCH] kvm: reuse per-vcpu stats fd to avoid vcpu interruption" was submitted.

Version-Release number of selected component (if applicable):
Host kernel: Scratch kernel 5.14.0-284.13.1.rt14.298kvmrtv1.el9_2.x86_64 
Guest kernel: Scratch kernel 5.14.0-284.13.1.rt14.298kvmrtv1.el9_2.x86_64
Qemu: qemu-kvm-core-7.2.0-14.el9_2.x86_64

How reproducible:
100%

Steps to Reproduce:
1. 
2.
3.

Actual results:

Expected results:

Additional info:

Adding zstream and ZTR=9.2.0, see bug 2214884 for details, especially https://bugzilla.redhat.com/show_bug.cgi?id=2214884#c2

*** Bug 2214884 has been marked as a duplicate of this bug. ***

Test steps to verify bug:

1) Run qemu-kvm in parallel with rt-trace-bpf, with isolated vcpu.

2) Run query-stats command on QMP 
(https://patchew.org/Libvirt/20220624081449.70085-1-natto@weirdnatto.in/20220624081449.70085-3-natto@weirdnatto.in/), should see
IPIs to pcpu where isolated vcpu runs.

3) with fixed qemu-kvm, should be able to run query-stats QMP command and not see the IPIs.

QE bot(pre verify): Set 'Verified:Tested,SanityOnly' as gating/tier1 test pass.

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: qemu-kvm security, bug fix, and enhancement 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-2023:6368