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[Glyn Normington <gnormington@xxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu)
       Status: Confirmed => Invalid

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https://bugs.launchpad.net/bugs/1303683

Title:
  Memory resource controller oom killing not functioning

Status in “linux” package in Ubuntu:
  Invalid

Bug description:
  This problem reproduces on Ubuntu 13.10 with a 3.11 kernel but, for
  comparison, works ok on RHEL 7 with a 3.10 kernel.

  Steps to reproduce:

  1. Make a directory, for example /home/glyn/cgh1.
  2. Switch to root user.
  3. Attach the memory resource controller subsystem to a cgroup hierarchy:

  # mount -t cgroup -o memory none /home/glyn/cgh1

  4. cd /home/glyn/cgh1

  5. Createa a child cgroup:

  # mkdir example

  6. cd example

  7. check oom killing is enabled:

  # cat memory.oom_control 
  oom_kill_disable 0
  under_oom 0

  8. Set a memory limit for the example cgroup of approx. 1 MB:

  # echo 1000000 > memory.limit_in_bytes 
  # cat memory.limit_in_bytes 
  1003520

  9. Move the current process into the example cgroup and check it has
  moved:

  # echo $$ > tasks
  # cat tasks
  7357
  8449
  # cat tasks
  7357
  8450

  10. Run a process which will exceed 1 MB of memory:

  # perl -e 'for ($i = 0; $i < 10; $i++) { $foo .= "A" x (1024 * 1024); }'
  #

  This terminates successfully whereas it should have been killed. On
  RHEL 7 (and on earlier Ubuntu versions I have tried), the results look
  like this:

  # perl -e 'for ($i = 0; $i < 10; $i++) { $foo .= "A" x (1024 * 1024); }'
  killed
  #

  I will attempt to reproduce this bug on an upstream kernel, but don't
  want to lose the bug report during the upgrade, hence I am filing the
  report now.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image (not installed)
  ProcVersionSignature: Ubuntu 3.11.0-17.31-generic 3.11.10.3
  Uname: Linux 3.11.0-17-generic x86_64
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  glyn       1587 F.... pulseaudio
  Date: Mon Apr  7 10:16:24 2014
  HibernationDevice: RESUME=UUID=18692506-8752-46bb-8b44-1fb2f0ba5e03
  InstallationDate: Installed on 2014-03-05 (32 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
   
   docker0   no wireless extensions.
  Lsusb:
   Bus 001 Device 004: ID 80ee:0021 VirtualBox USB Tablet
   Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: innotek GmbH VirtualBox
  MarkForUpload: True
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-17-generic root=UUID=24214f2e-a703-46ea-9fdd-0f64e110b628 ro quiet splash vt.handoff=7
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-17-generic N/A
   linux-backports-modules-3.11.0-17-generic  N/A
   linux-firmware                             1.116.2
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/01/2006
  dmi.bios.vendor: innotek GmbH
  dmi.bios.version: VirtualBox
  dmi.board.name: VirtualBox
  dmi.board.vendor: Oracle Corporation
  dmi.board.version: 1.2
  dmi.chassis.type: 1
  dmi.chassis.vendor: Oracle Corporation
  dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr:
  dmi.product.name: VirtualBox
  dmi.product.version: 1.2
  dmi.sys.vendor: innotek GmbH

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