kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Paul Szabo, could you please confirm this issue exists with the latest
development release of Ubuntu? ISO images are available from
http://cdimage.ubuntu.com/daily-live/current/ . If the issue remains,
could you please run the following command in the development release
from a Terminal (Applications->Accessories->Terminal), as it will
automatically gather and attach updated debug information to this
report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Please do not test the daily folder, but the one all the way at the bottom. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.11-rc4

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

If you are unable to test the mainline kernel, please comment as to why specifically you were unable to test it and add the following tags:
kernel-unable-to-test-upstream
kernel-unable-to-test-upstream-VERSION-NUMBER

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.

** Tags removed: bios-outdated-2.4.0 kernel-bug-exists-upstream
** Tags added: kernel-bug-exists-upstream-v3.8-rc3 latest-bios-2.4.0

-- 
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https://bugs.launchpad.net/bugs/1098961

Title:
  PAE regression: OOM with just a few sleeps

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  There is a spurious OOM issue with PAE kernel: it will suffer an OOM
  crash just by running a few processes.
  Please see also
    http://bugs.debian.org/695182
  and discussion on linux-mm@xxxxxxxxx e.g.
    http://marc.info/?l=linux-mm&m=135801969519193&w=2
  I wonder whether
    https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1098342
  is related.

  The issue is a regression with PAE, reproduced and verified on my
  home PC with 3GB RAM.

  My PC was running kernel linux-image-3.2.0-35-generic so it showed:
    psz@DellE520:~$ uname -a
    Linux DellE520 3.2.0-35-generic #55-Ubuntu SMP Wed Dec 5 17:45:18 UTC 2012 i686 i686 i386 GNU/Linux
    psz@DellE520:~$ free -l
                 total       used       free     shared    buffers     cached
    Mem:       3087972     692256    2395716          0      18276     427116
    Low:        861464      71372     790092
    High:      2226508     620884    1605624
    -/+ buffers/cache:     246864    2841108
    Swap:     20000920     258364   19742556
  Then it handled the "sleep test"
    bash -c 'n=0; while [ $n -lt 33000 ]; do sleep 600 & ((n=n+1)); ((m=n%500)); if [ $m -lt 1 ]; then echo -n "$n - "; date; free -l; sleep 1; fi; done'
  just fine, stopped only by "max user processes" (default setting of
  "ulimit -u 23964"), or raising that limit stopped when the machine ran
  out of PID space; there was no OOM.

  Installing and running the PAE kernel so it showed:
    psz@DellE520:~$ uname -a
    Linux DellE520 3.2.0-35-generic-pae #55-Ubuntu SMP Wed Dec 5 18:04:39 UTC 2012 i686 i686 i386 GNU/Linux
    psz@DellE520:~$ free -l
                 total       used       free     shared    buffers     cached
    Mem:       3087620     681188    2406432          0     167332     352296
    Low:        865208     214080     651128
    High:      2222412     467108    1755304
    -/+ buffers/cache:     161560    2926060
    Swap:     20000920          0   20000920
  and re-trying the "sleep test", it ran into OOM after 18000 or so sleeps
  and crashed/froze so I had to press the POWER button to recover.

  Cheers, Paul

  Paul Szabo   psz@xxxxxxxxxxxxxxxxx   http://www.maths.usyd.edu.au/u/psz/
  School of Mathematics and Statistics   University of Sydney    Australia
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
   **** List of PLAYBACK Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu15.1
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  psz        2190 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xdfddc000 irq 45'
     Mixer name	: 'SigmaTel STAC9227'
     Components	: 'HDA:83847618,102801dd,00100201'
     Controls      : 38
     Simple ctrls  : 21
  CurrentDmesg: [   28.160013] eth0: no IPv6 routers present
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=9d2bf7ac-9b0a-4082-ac45-f4d3c8e32c23
  IwConfig:
   lo        no wireless extensions.
   
   eth0      no wireless extensions.
  MachineType: Dell Inc. Dell DM061
  MarkForUpload: True
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=C
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: root=/dev/mapper/isw_cheedcedhh_DadMirroredTB4 ro quiet splash
  ProcVersionSignature: Ubuntu 3.2.0-35.55-generic-pae 3.2.34
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-35-generic-pae N/A
   linux-backports-modules-3.2.0-35-generic-pae  N/A
   linux-firmware                                1.79.1
  RfKill:
   
  Tags:  precise
  Uname: Linux 3.2.0-35-generic-pae i686
  UpgradeStatus: Upgraded to precise on 2012-04-27 (260 days ago)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  WifiSyslog: Jan 13 06:42:46 DellE520 NetworkManager[1384]: <info> Unmanaged Device found; state CONNECTED forced. (see http://bugs.launchpad.net/bugs/191889)
  WpaSupplicantLog:
   
  dmi.bios.date: 03/23/2007
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 2.2.1
  dmi.board.name: 0WG864
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 6
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvr2.2.1:bd03/23/2007:svnDellInc.:pnDellDM061:pvr:rvnDellInc.:rn0WG864:rvr:cvnDellInc.:ct6:cvr:
  dmi.product.name: Dell DM061
  dmi.sys.vendor: Dell Inc.

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