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

[Moses Moore]

Upgraded from 10.04 LTS to 12.04 LTS, and I was surprised to see my load
average at >= 2.00 for days.

OpenVZ virtual private server
`lsb_release -a |grep Desc`:    Ubuntu 12.04.1 LTS
`uname -a`: Linux 2.6.32-042stab057.1 x86_64
`dpkg -l rsyslog`: 5.8.6-1ubuntu8

I used the solution suggested in comment #49 above by sdeziel; after
disabling that module, rsyslogd is no longer hoarding CPU time, and load
average has dropped.

big question: after disabling 'imklog', is rsyslog now acquring *less*
information than the Ubuntu 10.04 version?  I'd like to know what I'm
missing out on, if anything.

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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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