Bug 463694

Summary:	[LTC 6.0 FEAT] 201592:Exploitation of DCSSs above 2G
Product:	Red Hat Enterprise Linux 6	Reporter:	IBM Bug Proxy <bugproxy>
Component:	kernel	Assignee:	Hans-Joachim Picht <hpicht>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Martin Jenner <mjenner>
Severity:	high	Docs Contact:
Priority:	high
Version:	6.0	CC:	ejratl, peterm
Target Milestone:	alpha	Keywords:	FutureFeature
Target Release:	---
Hardware:	s390x
OS:	All
Whiteboard:
Fixed In Version:		Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-09-17 10:48:56 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, 465490

Description IBM Bug Proxy 2008-09-24 06:30:44 UTC

=Comment: #0=================================================
Emily J. Ratliff <emilyr.com> - 2008-09-16 18:19 EDT
1. Feature Overview:
Feature Id:	[201592]
a. Name of Feature:	Exploitation of DCSSs above 2G
b. Feature Description
Update xip fs and DCSS block device driver to work with DCSSs with  addresses > 2G.  This will allow
applications to have one or more shared 'objects' whose cumulative size is > 2G.

2. Feature Details:
Sponsor:	zSeries
Architectures:
s390x

Arch Specificity: Purely Arch Specific Code
Affects Core Kernel: Yes
Affects Kernel Modules: Yes
Delivery Mechanism: Direct from community
Category:	zSeries
Request Type:	Kernel - Enhancement from Upstream
d. Upstream Acceptance:	In Progress
Sponsor Priority	1
f. Severity: High
IBM Confidential:	no
Code Contribution:	IBM code
g. Component Version Target:	2.6.28

3. Business Case
Several customers have expressed specific interest in the ability to have 'objects' residing in
shared memory that are either > 2G in size, or several objects whose aggregate size is >2G to have
more capacity and/or flexibility (Home Depot, Nationwide, TPF Software).  We believe there are many
other customers that stand to benefit (Hoplon, Real, IBM's ECM (Big Green) project, to name a few).

4. Primary contact at Red Hat: 
John Jarvis
jjarvis

5. Primary contacts at Partner:
Project Management Contact:
Hans-Georg Markgraf, mgrf.com, Boeblingen 49-7031-16-3978

Technical contact(s):

Gonzalo Muelas Serrano, gmuelas.com

IBM Manager:
Thomas Schwarz, t.schwarz.com

Comment 1 IBM Bug Proxy 2009-03-02 13:41:16 UTC

via upstream kernel, no code to attach to feature BZ

Comment 2 IBM Bug Proxy 2009-09-16 06:30:45 UTC

------- Comment From mgrf.com 2009-09-16 02:20 EDT-------
For the record,
the code for this feature is upstream accepted with k 2.6.28

Comment 3 Hans-Joachim Picht 2009-09-17 10:48:56 UTC

Code is included in the rhel6 kernel via upstream. Marked as CLOSED/CURRENTRELEASE by by Hans-Joachim Picht <hpicht>

Comment 4 IBM Bug Proxy 2010-07-16 07:00:51 UTC

------- Comment From mgrf.com 2010-07-16 02:54 EDT-------
This feature is verified on R6 snapshots
Set feature to "verified"  Thx

Further regression tests ongoing