Bug 1036492

Summary:	[RFE] [OVIRT] [VDSM] Hot Plug CPU - Support dynamic virtual CPU allocation and deallocation
Product:	[Retired] oVirt	Reporter:	Roy Golan <rgolan>
Component:	vdsm	Assignee:	Roy Golan <rgolan>
Status:	CLOSED DUPLICATE	QA Contact:	Haim <hateya>
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	abaron, acathrow, ahoness, bazulay, bsarathy, byount, iheim, juzhang, jwang, knoel, lpeer, mgoldboi, pablo.iranzo, rbinkhor, rgolan, rnelson, rshutt, sherold, sputhenp, yeylon
Target Milestone:	---	Keywords:	FutureFeature
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	virt
Fixed In Version:		Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:	833102
Clones:	1036764 1036767 1036768 1036770 (view as bug list)		Environment:
Last Closed:	2013-12-12 08:42:03 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	533138, 562886
Bug Blocks:	790582, 806907, 833102, 962051, 990116, 1036764, 1036767, 1036768, 1036770, 1036777

Description Roy Golan 2013-12-02 06:55:54 UTC

oVirt VDSM should support dynamically add/remove virtual CPUs to/from a guest that has this capability

WIKI: www.ovirt.org/Hot_plug_cpu

libvirt's api is setVcpus which is used for both add/remove. 
The guest is configured from the start with some max number of CPUs, and the initial number, the one which was used up till now set as "current". e.g

n: number of CPUs set to start the VM with
m: maximum number of CPUs a guest can have

old:
<vcpu>n</vcpu>

new:
<vcpu current="n" placement="static">m</vcpu>


new api verb:

setNumberOfCpus <vmId> <numberOfCpus>


A seperate RFE will be open for ovirt-engine

Comment 1 Itamar Heim 2013-12-07 20:40:08 UTC

*** Bug 1036767 has been marked as a duplicate of this bug. ***

Comment 2 Itamar Heim 2013-12-12 08:42:03 UTC


*** This bug has been marked as a duplicate of bug 1036764 ***