Bug 1579699

Summary:	[Deployment][RHOSP-10] Lift the restriction on choices for `cpu_model_extra_flags` config attribute
Product:	Red Hat OpenStack	Reporter:	Rajesh Tailor <ratailor>
Component:	puppet-nova	Assignee:	Rajesh Tailor <ratailor>
Status:	CLOSED ERRATA	QA Contact:	OSP DFG:Compute <osp-dfg-compute>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	10.0 (Newton)	CC:	amcleod, jjoyce, jschluet, lyarwood, nlevinki, nova-maint, owalsh, ratailor, slinaber, tvignaud
Target Milestone:	z9	Keywords:	Triaged, ZStream
Target Release:	10.0 (Newton)
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	puppet-nova-9.6.0-7.el7ost	Doc Type:	Enhancement
Doc Text:	With this enhancement, the Nova libvirt driver now allows the specification of granular CPU feature flags when configuring CPU models. One benefit of this change is the alleviation of a performance degradation experienced on guests running with certain Intel-based virtual CPU models after application of the "Meltdown" CVE fixes. This guest performance impact is reduced by exposing the CPU feature flag 'PCID' ("Process-Context ID") to the guest CPU, assuming that the PCID flag is available in the physical hardware. In this update, the restriction of using only the PCID flag is extended to expose multiple CPU feature flags. For more details, refer to the documentation of ``[libvirt]/cpu_model_extra_flags`` in ``nova.conf`` for usage details.	Story Points:	---
Clone Of:	1579681	Environment:
Last Closed:	2018-09-17 16:54:55 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1579681
Bug Blocks:	1579691, 1579693, 1579694

Comment 9 Alex McLeod 2018-09-03 08:00:13 UTC

Hi there,

If this bug requires doc text for errata release, please set the 'Doc Type' and provide draft text according to the template in the 'Doc Text' field.

The documentation team will review, edit, and approve the text.

If this bug does not require doc text, please set the 'requires_doc_text' flag to -.

Thanks,
Alex

Comment 11 errata-xmlrpc 2018-09-17 16:54:55 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/RHBA-2018:2670