Bug 463862

Summary:	[LTC 6.0 FEAT] 201257:KVM high performance multinode support
Product:	Red Hat Enterprise Linux 6	Reporter:	IBM Bug Proxy <bugproxy>
Component:	qemu-kvm	Assignee:	Eduardo Habkost <ehabkost>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	high	Docs Contact:
Priority:	high
Version:	6.0	CC:	borgan, cward, ejratl, jjarvis, kstansel, lihuang, snagar
Target Milestone:	alpha	Keywords:	FutureFeature, OtherQA
Target Release:	6.0
Hardware:	All
OS:	All
Whiteboard:
Fixed In Version:	qemu-kvm-0.12.1.2-2.1.el6	Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2010-11-10 21:24:03 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	356741, 511888, 512364, 524565, 554559, 555199, 555224

Description IBM Bug Proxy 2008-09-24 23:20:25 UTC

=Comment: #0=================================================
Emily J. Ratliff <emilyr.com> - 2008-09-24 13:53 EDT
1. Feature Overview:
Feature Id:	[201257]
a. Name of Feature:	Xen high performance multinode support
b. Feature Description
Further improvements to the Xen hypervisor to become consistent with the base level kernel, i.e.
#cpu (256), amount of mem (6TB),  scaling/perf/numa enhancements, automatic cpu pinning.   
Customers are looking for improvements to limitation that are currently existent in XEN.

Additional Comments:	256 CPU Support (128 physical / 256 with HT) / 6TB Memory Support

2. Feature Details:
Sponsor:	xSeries
Architectures:
x86
x86_64

Arch Specificity: Both
Affects Core Kernel: Yes
Delivery Mechanism: Direct from community
Category:	Kernel
Request Type:	Kernel - Enhancement from Upstream
d. Upstream Acceptance:	In Progress
Sponsor Priority	1
f. Severity: High
IBM Confidential:	no
Code Contribution:	3rd party code
g. Component Version Target:	Xen Enhancements

3. Business Case
Our flagship multi-node product, x3950 M2, will support up to 96 cpus by the end of 2008.  We are
expecting this number to at least reach 256 logical threads in 2009/2010.  Wtih 16GB DIMMS coming
out, expect the max memory to be as high as 6TB.

4. Primary contact at Red Hat: 
John Jarvis
jjarvis

5. Primary contacts at Partner:
Project Management Contact:
Monte Knutson, mknutson.com, 877-894-1495

Technical contact(s):
Kevin Stansell, kstansel.com
Chris McDermott, mcdermoc.com

IBM Manager:
Julio Alvarez, julioa.com

Comment 1 IBM Bug Proxy 2008-10-24 00:20:52 UTC

This should be a general requirement for the Virtualization environment for RHEL 6 (presumably KVM not Xen)  to support a platform/system capable of 256 cores/system threads and up to 6TB of memory, in a NUMA configuration.  If there's some split needed for those 2 components, or for any userland/ management/configuration/install pieces -- RH , please let us know.

Comment 3 Kevin Stansell 2009-11-18 21:34:31 UTC

Yes, this should all be against KVM and libvirt, not Xen. :)

Comment 4 Dor Laor 2010-01-18 11:43:12 UTC

Is it only physical constrains? Any virtual ones? For physical we should be fine.

Comment 8 John Jarvis 2010-08-27 15:23:30 UTC

IBM, please confirm this is fixed and if so, set the Verified field to "IBM"

Comment 9 Kevin Stansell 2010-09-10 14:19:13 UTC

We will follow the core RHEL6 limits here for KVM host support.  Closing.

Comment 10 releng-rhel@redhat.com 2010-11-10 21:24:03 UTC

Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.