Bug 680124

Summary:	s390x /proc/cpuinfo returns wrong number of processors on RHEL6
Product:	Red Hat Enterprise Linux 6	Reporter:	Martin Minar <mminar>
Component:	rhn-client-tools	Assignee:	Miroslav Suchý <msuchy>
Status:	CLOSED ERRATA	QA Contact:	Martin Minar <mminar>
Severity:	low	Docs Contact:
Priority:	low
Version:	6.0	CC:	mkoci
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	rhn-client-tools-1.0.0-56.el6	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:
Clones:	691743 (view as bug list)		Environment:
Last Closed:	2011-05-19 13:06:16 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:
Bug Blocks:	691743

Description Martin Minar 2011-02-24 12:46:21 UTC

Description of problem:
s390x /proc/cpuinfo returns wrong number of processors therefor after registration there is wrong number of processors in Satellite Hardware information.

Version-Release number of selected component (if applicable):
rhn-client-tools-1.0.0-38.el6.noarch

How reproducible:
Always

Steps to Reproduce:
1. Log into s390x machine that has more than 1 processor
2. cat /proc/cpuinfo
3. ls -d  /sys/devices/system/cpu/cpu[0-9] | grep -c cpu[[:digit:]]
4. rhn_register into Satellite and check System > Hardware
  
Actual results:
Numbers differ

Expected results:
Same numbers

Additional info:
RHEL5 /proc/cpuinfo shows proper information.
Explanation for this bug is in bug 621041 comment 18.

Comment 2 Martin Minar 2011-02-25 07:53:33 UTC

After discussion with dhorak short clarification.

There is cpuplugd daemon that automaticaly adds/removes cpus based on load and /proc/cpuinfo shows number of cpus defined in that moment. Regarding the fact that this bug is not an issue in RHEL5 - maybe this daemon is not activated by default or it depends on kernel.

Strategy of using /sys/devices/cpu for getting total number of cpus should be the valid on.

Comment 3 Miroslav Suchý 2011-03-17 09:40:36 UTC

Fixed in spacewalk.git in commits:
823888291bdc6f9cd4d843d18bd7ea88241fac89
3ecd060daf6b53baf63122c80c1d52fdbcba6c38

Cherry picked to satellite.git as commits:
ba1b95e5540c39b2aeacfdb4f0a42e6de97e1453
dd8f84ad7fb07be944f5796abaf134806d3d4413

Comment 5 Martin Minar 2011-03-18 13:32:59 UTC

Verified in rhn-client-tools-1.0.0-56.el6 - Hardware tab now shows correct number.

Comment 6 errata-xmlrpc 2011-05-19 13:06:16 UTC

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.

http://rhn.redhat.com/errata/RHBA-2011-0565.html