kernel-packages team mailing list archive

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

lordan lordanov, as per
http://www.supermicro.com/support/resources/results.aspx an update is
available for your BIOS (R 3.0b). If you update to this, does it change
anything?

If not, could you please both specify what happened, and provide the output of the following terminal command:
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date

Thank you for your understanding.

** Tags added: bios-outdated-r3.0b needs-upstream-testing regression-
potential

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

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https://bugs.launchpad.net/bugs/1098342

Title:
  out of memory errors when performing I/O on a system with large amount
  of RAM and 32-bit pae kernel

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  We have a system with 64GB of RAM which we have to run with a 32-bit
  installation for various reasons. When performing I/O on that system,
  we suddenly get "Out of memory" errors, and if I/O is fast enough
  (i.e. cat /dev/zero > /dev/shm/somefile), the system becomes unusable
  very quickly. The following list of example commands will cause an OOM
  condition at various speeds:

  # Causes OOM and complete denial of service within 10-15 seconds:
  cat /dev/zero > /dev/shm/somefile

  # Causes OOM and complete denial of service within 30 - 40 seconds:
  cat /dev/zero > /dev/shm

  # Causes sporadic OOM errors:
  cat /dev/sda > /dev/sdb

  The /dev/sda and /dev/sdb devices read and write sequentially at about
  150MB/s.

  The same error was reproduced with the newest upstream 32-bit pae
  kernels from 12.10 (quantal) and 13.04 (raring). Also, the same was
  reproduced with Debian Queeze 32-bit kernel (2.6.32) installed on
  Ubuntu 12.04.

  The error appears to be absent in 64-bit kernels (installed instead of
  the 32-bit kernel on the same 32-bit Ubuntu 12.04 installation).

  Please see attached an example of OOM and DoS that was caused with
  "cat /dev/shm > /dev/shm/somefile" in the out_of_memory_errors.txt
  attachment.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-35-generic-pae 3.2.0-35.55
  ProcVersionSignature: Ubuntu 3.2.0-35.55-generic-pae 3.2.34
  Uname: Linux 3.2.0-35-generic-pae i686
  AlsaDevices:
   total 0
   crw-rw---T 1 root audio 116,  1 Jan 10 15:55 seq
   crw-rw---T 1 root audio 116, 33 Jan 10 15:55 timer
  AplayDevices: aplay: device_list:252: no soundcards found...
  ApportVersion: 2.0.1-0ubuntu14
  Architecture: i386
  ArecordDevices: arecord: device_list:252: no soundcards found...
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  CurrentDmesg:
   [   11.884916] NFSD: starting 90-second grace period
   [   18.448013] eth0: no IPv6 routers present
  Date: Thu Jan 10 16:10:40 2013
  IwConfig: Error: [Errno 2] No such file or directory
  MachineType: Supermicro H8DGU
  PciMultimedia:
   
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   SHELL=/bin/bash
  ProcFB:
   
  ProcKernelCmdLine: root=/dev/sda1 ro
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-35-generic-pae N/A
   linux-backports-modules-3.2.0-35-generic-pae  N/A
   linux-firmware                                1.79.1
  RfKill: Error: [Errno 2] No such file or directory
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  WifiSyslog:
   
  dmi.bios.date: 12/10/10
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1.1
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: H8DGU
  dmi.board.vendor: Supermicro
  dmi.board.version: 1234567890
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 17
  dmi.chassis.vendor: Supermicro
  dmi.chassis.version: 1234567890
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.1:bd12/10/10:svnSupermicro:pnH8DGU:pvr1234567890:rvnSupermicro:rnH8DGU:rvr1234567890:cvnSupermicro:ct17:cvr1234567890:
  dmi.product.name: H8DGU
  dmi.product.version: 1234567890
  dmi.sys.vendor: Supermicro

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