Bug 463614

Summary:	[LTC 6.0 FEAT] 201191:Allow DLPARs to shrink memory
Product:	Red Hat Enterprise Linux 6	Reporter:	IBM Bug Proxy <bugproxy>
Component:	kernel	Assignee:	Kevin W Monroe <kmonroe>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Martin Jenner <mjenner>
Severity:	high	Docs Contact:
Priority:	high
Version:	6.0	CC:	ejratl, notting, peterm
Target Milestone:	alpha	Keywords:	FutureFeature
Target Release:	6.0
Hardware:	All
OS:	All
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-09-23 22:16:02 UTC	Type:	---
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:	356741

Description IBM Bug Proxy 2008-09-24 03:30:43 UTC

=Comment: #0=================================================
Emily J. Ratliff <emilyr.com> - 2008-09-16 18:07 EDT
1. Feature Overview:
Feature Id:	[201191]
a. Name of Feature:	Allow DLPARs to shrink memory
b. Feature Description
IBM System p hardware now includes a Dynamic Logical Partitioning (DLPAR) feature.  In order for an
administrator to be able to resize downward such a partition's resource usage, the operating system
must support hot memory removal.

2. Feature Details:
Sponsor:	LTC
Architectures:
ppc64

Arch Specificity: Both
Affects Core Kernel: Yes
Delivery Mechanism: Direct from community
Category:	Kernel
Request Type:	Kernel - Enhancement from IBM
d. Upstream Acceptance:	Accepted
Sponsor Priority	2
f. Severity: Medium
IBM Confidential:	no
Code Contribution:	IBM code
g. Component Version Target:	2.6.26

3. Business Case
System p hardware enablement

4. Primary contact at Red Hat: 
John Jarvis
jjarvis

5. Primary contacts at Partner:
Project Management Contact:
Mike Wortman, wortman.com, 512-838-8582

Technical contact(s):
Badari Pulavarty, badari.com
Nathan Fontenot, nfonteno.com

IBM Manager:
Wendel Voigt, wvoigt.com

Comment 1 Bill Nottingham 2008-10-02 20:27:19 UTC

RHEL 6 will include at least a 2.6.26 kernel, so this should not be a problem.

The feature requested has already been accepted into the upstream code base
planned for the next major release of Red Hat Enterprise Linux.

When the next milestone release of Red Hat Enterprise Linux 6 is available,
please verify that the feature requested is present and functioning as
desired.

Comment 2 IBM Bug Proxy 2009-03-02 20:30:45 UTC

The code for hotplug memory remove went into the 2.6.27 and 2.6.28 kernels.

Comment 3 Kevin W Monroe 2009-09-23 22:16:02 UTC

Closing - included in Red Hat Enterprise Linux 6.