Bug 875006 - excessive cpu usage if a file with a left parenthesis exists in /etc/sysconfig/network-scripts
Summary: excessive cpu usage if a file with a left parenthesis exists in /etc/sysconfi...
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Fedora
Classification: Fedora
Component: libvirt
Version: 20
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Laine Stump
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-11-09 09:58 UTC by Alon Levy
Modified: 2014-08-04 22:09 UTC (History)
12 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2013-12-16 20:00:31 UTC
Type: Bug
Embargoed:


Attachments (Terms of Use)

Description Alon Levy 2012-11-09 09:58:00 UTC
Description of problem:
This is actually a problem of netcf which libvirt uses to count the number of interfaces, but it results in a libvirt problem so I think it should be solved here as well, by not using too much cpu in the case netcf fails repeatedly.

Version-Release number of selected component (if applicable):
libvirt-daemon-0.10.2.1-2.fc18.x86_64
netcf-libs-0.2.2-1.fc18.x86_64
augeas-0.10.0-5.fc18.x86_64

How reproducible:
100%

Steps to Reproduce:
1. sudo touch /etc/sysconfig/network-scripts/ifcfg-\(
  
Actual results:
top shows libvirt using 40% cpu

Expected results:
no significant change in cpu usage

Additional info:
The fault path is actually in augeas usage by netcf, and most of the cpu is in regexp code in glibc per perf record.

I couldn't grok the augeas code so I just started removing the ifcfg files until finding the faulty one.

Comment 1 Cole Robinson 2013-12-16 20:00:31 UTC
This doesn't seem to be an issue with F20 at least, and given that F18 is EOL real soon, just closing


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