Bug 203033

Summary:	kernel errors: /proc/interrupts & irqbalance
Product:	Red Hat Enterprise Linux 4	Reporter:	Jack <jlpogue3>
Component:	kernel	Assignee:	Kernel Maintainer List <kernel-maint>
Status:	CLOSED INSUFFICIENT_DATA	QA Contact:	Brian Brock <bbrock>
Severity:	low	Docs Contact:
Priority:	medium
Version:	4.0
Target Milestone:	---
Target Release:	---
Hardware:	i686
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-10-01 20:43:18 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:

Description Jack 2006-08-17 21:38:16 UTC

From Bugzilla Helper:
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Description of problem:
The virtual file /proc/interrupts seemed to have no inode reference.  ls -l on /proc reported the interrupts file, but no permissions or related information.  ls -l /proc/interrupts hung the ls process.

The inode issue for /proc/interrupts caused irqbalance and klogd to overwhelm the CPU (using over 90% for each process) and fill the logs.

To correct the issue, I did the following:

1) stop klogd / syslogd
2) free /var disk space
3) stop selinux (was set to enforced)

Immediately afterward, the /proc/interrupts inode returned and the system began working correctly again.

Version-Release number of selected component (if applicable):
Using standard RHEL4U1 distribution

How reproducible:
Didn't try


Steps to Reproduce:
Sorry, but this is a production environment, I don't want to reproduce this problem.


Actual Results:


Expected Results:


Additional info:

Comment 1 Jason Baron 2006-08-18 15:11:40 UTC

ok, well if this happens again hopefully we can get more to go on. The 'ls -l'
that hung, could you please run as: 'strace ls -l'. Then when that hangs, do
alt-sysrq-t, so we can see where it is stuck. Thanks.

Comment 2 Jay Fenlason 2007-10-01 20:43:18 UTC

There has been no reply in over a year, so I'm closing this.  If you have the 
needed data, please attach it to this bug and reopen it.