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Bug 1571756 - [RFE][Deployment] add ability to configure extra CPU flags for named CPU models
[RFE][Deployment] add ability to configure extra CPU flags for named CPU models
Status: CLOSED ERRATA
Product: Red Hat OpenStack
Classification: Red Hat
Component: puppet-nova (Show other bugs)
10.0 (Newton)
All Linux
high Severity high
: z9
: 10.0 (Newton)
Assigned To: Rajesh Tailor
nova-maint
: FutureFeature, InstallerIntegration, TestOnly, Triaged, ZStream
Depends On: 1398343 1547954 1570610 1570611 1570614 1570617
Blocks: 1571741 1571744 1571750
  Show dependency tree / graph
 
Reported: 2018-04-25 07:23 EDT by Rajesh Tailor
Modified: 2018-09-17 12:55 EDT (History)
25 users (show)

See Also:
Fixed In Version: puppet-nova-9.6.0-4.el7ost
Doc Type: Enhancement
Doc Text:
Nova's 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 that has been 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 itself. For more details, refer to the documentation of ``[libvirt]/cpu_model_extra_flags`` in ``nova.conf`` for usage details.
Story Points: ---
Clone Of: 1547954
Environment:
Last Closed: 2018-09-17 12:54:10 EDT
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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External Trackers
Tracker ID Priority Status Summary Last Updated
OpenStack gerrit 561796 None None None 2018-04-25 07:23 EDT
Red Hat Product Errata RHBA-2018:2670 None None None 2018-09-17 12:55 EDT

  None (edit)
Comment 3 Jon Schlueter 2018-06-28 15:35:43 EDT 
According to our records, this should be resolved by puppet-nova-9.6.0-4.el7ost.  This build is available now.
Comment 8 errata-xmlrpc 2018-09-17 12:54:10 EDT 
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
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