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[Launchpad Bug Tracker <750133@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

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

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https://bugs.launchpad.net/bugs/750133

Title:
  The system becomes unresponsive under memory pressure even without
  swap

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  I've disabled swap in my system. Even then with workloads that stress
  the VM I have been able to make it completely unresponsive. There were
  two situations where I observed this:

  - OpenOffice loading a document full of images from disk. Midway through the process the system became completely unresponsive.
  - Running a script that unpacked a series of tar archives and compared them with diff. I created a 1GB tmpfs dir to do it in to not have the uncompressed archives ever hit disk. Midway through the process the system again became completely unresponsive

  In both situations the harddrive light was on continuously and it
  could be heard working. Since none of the workloads actually writes to
  disk and there's no swap the only thing I can imagine can be happening
  is that dirty buffers are being written back to free memory. I didn't
  expect this to have such an adverse impact on responsiveness of the
  system though.

  ProblemType: Bug
  DistroRelease: Ubuntu 10.10
  Package: linux-image-2.6.35-28-generic 2.6.35-28.49
  Regression: No
  Reproducible: Yes
  ProcVersionSignature: Ubuntu 2.6.35-28.49-generic 2.6.35.11
  Uname: Linux 2.6.35-28-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  pedrocr    1698 F.... pulseaudio
   /dev/snd/controlC0:  pedrocr    1698 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf8220000 irq 46'
     Mixer name	: 'Analog Devices AD1984'
     Components	: 'HDA:11d41984,17aa20d6,00100400'
     Controls      : 31
     Simple ctrls  : 19
  Card1.Amixer.info:
   Card hw:1 'U0x46d0x80a'/'USB Device 0x46d:0x80a at usb-0000:00:1a.7-3, high speed'
     Mixer name	: 'USB Mixer'
     Components	: 'USB046d:080a'
     Controls      : 2
     Simple ctrls  : 1
  Card1.Amixer.values:
   Simple mixer control 'Mic',0
     Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum
     Capture channels: Mono
     Limits: Capture 0 - 6400
     Mono: Capture 5504 [86%] [27.50dB] [on]
  Card29.Amixer.info:
   Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 7MHT25WW-1.03'
     Mixer name	: 'ThinkPad EC 7MHT25WW-1.03'
     Components	: ''
     Controls      : 1
     Simple ctrls  : 1
  Card29.Amixer.values:
   Simple mixer control 'Console',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [on]
  Date: Mon Apr  4 03:01:18 2011
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=13a2cbed-32ea-49ec-8630-6cad479c043d
  MachineType: LENOVO 7673CR8
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-28-generic root=UUID=7e1b8cc5-9055-41c8-bd30-ddde4717884c ro processor.max_cstate=2 quiet splash
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.utf8
   SHELL=/bin/bash
  RelatedPackageVersions: linux-firmware 1.38.5
  SourcePackage: linux
  WpaSupplicantLog:
   
  dmi.bios.date: 03/12/2009
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 7NETC0WW (2.20 )
  dmi.board.name: 7673CR8
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr7NETC0WW(2.20):bd03/12/2009:svnLENOVO:pn7673CR8:pvrThinkPadX61:rvnLENOVO:rn7673CR8:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 7673CR8
  dmi.product.version: ThinkPad X61
  dmi.sys.vendor: LENOVO

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