nova/releasenotes/notes/remove-intel-cmt-perf-events-69df7324d6fe41a8.yaml
Stephen Finucane e45f3b5d71 Remove support for Intel CMT events
The 4.14 kernel is sufficiently old in the tooth (Ubuntu 18.04 uses
4.15, RHEL 7.x has likely backported the fixes) that there are likely
not a great deal of users that could still use this broken feature if
they wanted to. Drop support for it almost entirely, retaining only a
warning to prevent accidental use.

Change-Id: Iad76bce128574dc2f86998ccf2a9c5e799c71313
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
2020-09-01 17:36:31 +01:00

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YAML

---
upgrade:
- |
Intel CMT perf events - ``cmt``, ``mbmt``, and ``mbml`` - are no longer
supported by the ``[libvirt] enabled_perf_events`` config option. These
event types were broken by design and are not supported in recent Linux
kernels (4.14+).