[Bug 523610] Re: rsyslogd spins CPU on some kernels

[Simon Déziel]

For those running OpenVZ/Proxmox containers, one simple workaround is to
disable the imklog module using this :

  sed -i -e 's/^\$ModLoad imklog/#\$ModLoad imklog/g' /etc/rsyslog.conf

This fixes the 100% CPU usage of rsyslog in Natty, Oneiric and Precise
containers.

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https://bugs.launchpad.net/bugs/523610

Title:
  rsyslogd spins CPU on some kernels

Status in “rsyslog” package in Ubuntu:
  Fix Released
Status in “rsyslog” source package in Lucid:
  Fix Released

Bug description:
  While running 20100218 EC2 image (ami-0512fe6c) rsyslog is constantly
  the following message (found in /var/log/kern.log):

  Feb 18 05:01:52 ubuntu kernel: imklog 4.2.0, log source = /proc/kmsg started.
  Feb 18 05:01:52 ubuntu kernel: Cannot read proc file system: 1 - Operation not permitted.
  Feb 18 05:02:22 ubuntu kernel: last message repeated 643668 times
  Feb 18 05:03:22 ubuntu kernel: last message repeated 1865459 times
  Feb 18 05:04:22 ubuntu kernel: last message repeated 1327321 times
  Feb 18 05:05:22 ubuntu kernel: last message repeated 1644146 times
  Feb 18 05:06:23 ubuntu kernel: last message repeated 1826234 times
  Feb 18 05:07:23 ubuntu kernel: last message repeated 1817861 times
  Feb 18 05:08:23 ubuntu kernel: last message repeated 1807415 times
  Feb 18 05:09:23 ubuntu kernel: last message repeated 1813151 times
  Feb 18 05:10:23 ubuntu kernel: last message repeated 1857271 times
  Feb 18 05:11:23 ubuntu kernel: last message repeated 1810173 times
  Feb 18 05:12:23 ubuntu kernel: last message repeated 1826654 times
  Feb 18 05:13:23 ubuntu kernel: last message repeated 1825384 times

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