[Bug 1303649] Re: systemd-logind spins in cgmanager_ping_sync()

[Guilherme G. Piccoli]

Thanks Dale and Marcelo for your quick report - this is really useful.
The problem seem to be caused due to cgmanager being added as dependency
of systemd in -proposed - this request was clearly explained in LP
#1750013 (not a dup for this, it's another issue with systemd-logind).

During my test I didn't observe such bad behavior of high CPU
utilization - might be some interaction I didn't explore/reproduce. Can
you check please if you're using -backports repo ? If so, then the
cgmanager version installed in your system was 0.39 (the default
version, without -backports repo, is 0.24).

Anyway, the systemd package with cgmanager as dependency was _removed_
from -proposed, so as next step I'll focus in fixing the other LP
without adding cgmanager, and eventually investigate what bad
interaction happened in your case to address it.

Thanks,


Guilherme

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https://bugs.launchpad.net/bugs/1303649

Title:
  systemd-logind spins in cgmanager_ping_sync()

Status in cgmanager package in Ubuntu:
  Invalid
Status in libnih package in Ubuntu:
  Invalid
Status in lxc package in Ubuntu:
  Fix Released
Status in systemd package in Ubuntu:
  Fix Released

Bug description:
  systemd-logind is consuming a high level of cpu on a continual basis:

    PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND                                                                                
    676 root      20   0   43644   2144   1568 R 100.0  0.0  74:43.77 systemd-logind

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: systemd-services 204-5ubuntu17
  ProcVersionSignature: Ubuntu 3.13.0-22.44-generic 3.13.8
  Uname: Linux 3.13.0-22-generic x86_64
  ApportVersion: 2.14.1-0ubuntu1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Mon Apr  7 09:09:37 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2013-04-23 (348 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130423)
  SourcePackage: systemd
  UpgradeStatus: Upgraded to trusty on 2013-11-11 (146 days ago)

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