Bug 1332916

Summary: 'hw:cpu_thread_policy=prefer' misbehaviour
Product: [Community] RDO Reporter: Ricardo Noriega <rnoriega>
Component: openstack-novaAssignee: Prasanth Anbalagan <panbalag>
Status: CLOSED EOL QA Contact: nlevinki <nlevinki>
Severity: high Docs Contact:
Priority: unspecified    
Version: trunkCC: berrange, dasmith, eglynn, jjung, rbryant, rnoriega, sbauza, sferdjao, sgordon, srevivo, vromanso
Target Milestone: ---   
Target Release: Kilo   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
: 1333457 (view as bug list) Environment:
Last Closed: 2016-05-19 15:50:12 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:    
Bug Blocks: 1333457    

Description Ricardo Noriega 2016-05-04 11:12:11 UTC 
Description of problem:

'hw:cpu_thread_policy=prefer' allocates vCPUs in pairs of sibling threads properly. An odd number of vCPUs will allocate pairs and a single one. That single one should not be isolated. So 20 available threads, shall be able to allocate 4 VMs of 5 vCPUs. When booting up the third VM, it is giving an error.

Version-Release number of selected component (if applicable):

Mitaka

How reproducible:

Highly

Steps to Reproduce:

Check https://bugs.launchpad.net/nova/+bug/1578155

Actual results:


Check https://bugs.launchpad.net/nova/+bug/1578155

Expected results:


Check https://bugs.launchpad.net/nova/+bug/1578155

Additional info:
Comment 1 Chandan Kumar 2016-05-19 15:50:12 UTC 
This bug is against a Version which has reached End of Life.
If it's still present in supported release (http://releases.openstack.org), please update Version and reopen.