1. Feature Overview:
Feature Id: 
a. Name of Feature: [6.1 FEAT] Implement lsmem and chmem
b. Feature Description
This feature provides the lsmem and chmem commands to manage memory hotplug. With lsmem, you can
display the online status of all available memory. With chmem, you can set memory online or offline.
The lsmem command lists the ranges of available memory with their online status. The listed memory
blocks correspond to the memory block representation in sysfs. The lsmem command also shows the
memory block size, the device size, and the amount of memory in online and offline state.
The chmem command to set a particular size or range of memory online or offline
[For output use monospace font for proper display!]
lsmem sample output:
Range Size (MB) State Removable Device
0x0000000000000000-0x000000000fffffff 256 online no 0
0x0000000010000000-0x000000002fffffff 512 online yes 1-2
0x0000000030000000-0x000000003fffffff 256 online no 3
0x0000000040000000-0x000000006fffffff 768 online yes 4-6
0x0000000070000000-0x00000000ffffffff 2304 offline - 7-15
Memory device size : 256 MB
Memory block size : 256 MB
Total online memory : 1792 MB
Total offline memory: 2304 MB
2. Feature Details:
Sponsor: LTC zSeries BOE
Architectures: zSeries - 64 native,
Arch Specificity: purely arch specific code
Affects Kernel Modules: Field does not exist
Delivery Mechanism: Backport
Category: system management
Request Type: Package - Feature from IBM
d. Upstream Acceptance: Field does not exist
Sponsor Priority P1
f. Severity: ship issue
IBM Confidential: No
Code Contribution: IBM code
g. Component Version Target:---
3. Business Case
This tool will enhance the systems management/monitoring capabilities of customer's memory usage, by
using this very capable but at the same time low footprint tool, which will increase the customer
4. Primary contact at Red Hat:
John Jarvis, firstname.lastname@example.org
5. Primary contacts at Partner:
Project Management Contact:
Hans-Georg Markgraf, email@example.com
Gonzalo Muelas Serrano, firstname.lastname@example.org
Is this a new package request? If so, is the package already in Fedora?
this will be part of s390tools/utils and be provided as a backport to existing RHEL 6.0 version.
Unfortunately through the mirroring this information got lost. I have updated the component here directly.
------- Comment From email@example.com 2010-10-04 10:36 EDT-------
Code Upstream Status: Accepted
Created attachment 463954 [details]
------- Comment on attachment From firstname.lastname@example.org 2010-12-01 06:44 EDT-------
Summary: lsmem/chmem: Tools to manage memory hotplug.
Description: With lsmem, you can display the online status of all available
memory. With chmem, you can set memory online or offline.
IBM is signed up to test and provide feedback, setting OtherQA.
This enhancement request was evaluated by the full Red Hat Enterprise Linux
team for inclusion in a Red Hat Enterprise Linux minor release. As a
result of this evaluation, Red Hat has tentatively approved inclusion of
this feature in the next Red Hat Enterprise Linux Update minor release.
While it is a goal to include this enhancement in the next minor release
of Red Hat Enterprise Linux, the enhancement is not yet committed for
inclusion in the next minor release pending the next phase of actual
code integration and successful Red Hat and partner testing.
------- Comment From email@example.com 2011-03-28 14:13 EDT-------
This feature is verified on R 6.1 test deliverables - set to verified on IBM site
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.