Expired? That is weird... how come it did not expire between comments#18 and comments#19, between 16Jan and 6Aug?
Anyway the bug is "alive"... as anyone could easily test, with a simple 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' On any PAE machine (any amount of RAM, any version userland code, and any version kernel, I tested many), that should produce an OOM in a minute or so. Conversely: does anyone have a PAE machine where the above does not produce an OOM? Yes I know I promised to test "latest development and upstream" or somesuch. Sorry I did not get around to it, yet: the test would be rather disruptive on my home computer. I also note the suggestion (from kernel developers?) in the references above, to use amd64 kernel even with 32-bit userland. Maybe Ubuntu could follow suit. Cheers, Paul -- 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
