Bug 790899

Summary:	irqbalance: WARNING, didn't collect load info for all cpus, balancing is broken
Product:	[Fedora] Fedora	Reporter:	Bob Arendt <rda>
Component:	irqbalance	Assignee:	Petr Holasek <pholasek>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	16	CC:	anton, dhoward, nhorman, pholasek
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	irqbalance-1.0.3-3.fc16	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-03-17 23:55:24 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Bob Arendt 2012-02-15 17:11:04 UTC

Description of problem:
The following message is output once a minute to /var/log/messages:
/usr/sbin/irqbalance: WARNING, didn't collect load info for all cpus, balancing is broken


Version-Release number of selected component (if applicable):
irqbalance-1.0.3-2.fc16.x86_64


How reproducible:
always


Steps to Reproduce:
echo "IRQBALANCE_BANNED_CPUS=1" >> /etc/sysconfig/irqbalance
systemctl restart irqbalance.service 
 .. messages start in /var/log/messages

Remove the line from the irqbalance config file, restart, and the message output stops. 

NOTE: It's important for us to ban the assignment of network device IRQs from CPU0, otherwise packet loss can occur every 10 minutes (the /proc/sys/net/ipv4/ipfrag_secret_interval) for high-speed data links.


Actual results:
.. as noted above

Expected results:
.. No message, and CPU0 should be excluded from the irqbalance algorithm.

Additional info:
The man page documents IRQBALANCE_BANNED_CPUS, but doesn't mention IRQ_AFFINITY_MASK.  On the other hand, the config file has some documentation on IRQ_AFFINITY_MASK but no longer mentions IRQBALANCE_BANNED_CPUS.  It looks like someone is in the middle of reworking irqbalance??

Comment 1 Anton Arapov 2012-02-16 07:43:08 UTC

Thanks for the report, we will take a look.

Comment 2 Petr Holasek 2012-02-20 16:55:17 UTC

FYI, issue fixed in upstream commit http://code.google.com/p/irqbalance/issues/detail?id=26

Comment 3 Fedora Update System 2012-03-01 12:15:08 UTC

irqbalance-1.0.3-3.fc16 has been submitted as an update for Fedora 16.
https://admin.fedoraproject.org/updates/irqbalance-1.0.3-3.fc16

Comment 4 Fedora Update System 2012-03-06 19:43:30 UTC

Package irqbalance-1.0.3-3.fc16:
* should fix your issue,
* was pushed to the Fedora 16 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing irqbalance-1.0.3-3.fc16'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2012-3118/irqbalance-1.0.3-3.fc16
then log in and leave karma (feedback).

Comment 5 Fedora Update System 2012-03-17 23:55:24 UTC

irqbalance-1.0.3-3.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.