Following a suggestion in http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=695182#513 I tested older kernels: seems that PAE was always (or at least back to karmic 2.6.31) prone to OOM under the "sleep test". Curiously I found that non-PAE kernels of that vintage might also OOM, maybe depending on the value of /proc/sys/fs/file-max .
Cheers, Paul Paul Szabo p...@maths.usyd.edu.au http://www.maths.usyd.edu.au/u/psz/ School of Mathematics and Statistics University of Sydney Australia --- Machine: Dell Optiplex 760, 4GB RAM Results: Version Name kernel 4.10 Warty 2.6.8 (could not install from CD) 5.04 Hoary 2.6.10 5.10 Breezy 2.6.12 6.06 Dapper 2.6.15 6.10 Edgy 2.6.17 7.04 Feisty 2.6.20 (could not install from CD) 7.10 Gutsy 2.6.22 (could not install from CD) 8.04 Hardy 2.6.24 8.10 Intrepid 2.6.27-7 (no PAE) non-PAE(file-max=330344,default)=OK (about 19000 to file limit) non-PAE(file-max=555000)=OOM (after about 31000) 9.04 Jaunty 2.6.28 9.10 Karmic 2.6.31-14 PAE=OOM non-PAE(file-max=327956,default)=OK (about 18500 to file limit) non-PAE(file-max=444000)=OK (about 26000 to file limit) non-PAE(file-max=555000)=OK (to PID limit) non-PAE(file-max=888000)=OK (to PID limit) non-PAE(file-max=999999)=OOM (after about 32500) 10.04 Lucid 2.6.32-65 PAE=OOM non-PAE(file-max=330827,default)=OK (about 19000 to file limit) non-PAE(file-max=377000)=OK (about 21500 to file limit) non-PAE(file-max=444000)=OK (about 25500 to file limit) non-PAE(file-max=555000)=OOM (after about 31500) 10.10 Maverick 2.6.35-22 (PAE=?) non-PAE(file-max=330677,default)=OK (to PID limit) 11.04 Natty 2.6.38-8 PAE=OOM non-PAE(file-max=330426,default)=OK (to PID limit) 11.10 Oneiric 3.0.0 PAE=OOM non-PAE=OK 12.04 Precise 3.2 12.10 Quantal 3.5 13.04 Raring 3.8 13.10 Saucy 3.11 14.04 Trusty 3.13 PAE=OOM (no non-PAE kernel) 14.10 Utopic 3.16 References: http://en.wikipedia.org/wiki/List_of_Ubuntu_releases https://wiki.ubuntu.com/Releases http://old-releases.ubuntu.com/releases/ http://bugs.debian.org/695182 http://bugs.launchpad.net/ubuntu/+source/linux/+bug/1098961 Commands used: sudo sh -c 'echo 999999 > /proc/sys/fs/file-max' 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' ** Bug watch added: Debian Bug tracker #695182 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=695182 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1098961 Title: PAE regression: OOM with just a few sleeps Status in “linux” package in Ubuntu: Expired 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...@kvack.org 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 p...@maths.usyd.edu.au 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1098961/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
