Bug 1579699 - [Deployment][RHOSP-10] Lift the restriction on choices for `cpu_model_extra_flags` config attribute
Summary: [Deployment][RHOSP-10] Lift the restriction on choices for `cpu_model_extra_f...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat OpenStack
Classification: Red Hat
Component: puppet-nova
Version: 10.0 (Newton)
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: z9
: 10.0 (Newton)
Assignee: Rajesh Tailor
QA Contact: OSP DFG:Compute
URL:
Whiteboard:
Depends On: 1579681
Blocks: 1579691 1579693 1579694
TreeView+ depends on / blocked
 
Reported: 2018-05-18 07:18 UTC by Rajesh Tailor
Modified: 2023-03-21 18:51 UTC (History)
10 users (show)

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.
Clone Of: 1579681
Environment:
Last Closed: 2018-09-17 16:54:55 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2018:2670 0 None None None 2018-09-17 16:56:19 UTC

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
Note You need to log in before you can comment on or make changes to this bug.