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

** This bug is no longer a duplicate of bug 1518457
   kswapd0 100% CPU usage

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https://bugs.launchpad.net/bugs/595047

Title:
  Frequent swapping causes system to hang

Status in Linux:
  Fix Released
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Periodically I notice my system slows to a near stand still, and the
  hard drive light is constantly going.  This seems to be a massive
  amount of disk i/o and it lasts for a long time (lets say 30 mins to
  put a number on it).  I installed and ran iotop (`iotop -a`) and it
  seems to point to jbd2.  From what I can see jbd2 is related to ext4
  journaling, but I cannot figure out how to kill this operation.  It
  might even be a red herring because I have also stopped the disk
  activity by kill either chromium or firefox.  I need to understand
  what else I can do to troubleshoot this.

  $ lsb_release -rd
  Description:	Ubuntu maverick (development branch)
  Release:	10.10

  Up-to-date as of 16th June 2010.
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
  AplayDevices:
   **** List of PLAYBACK Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC272X Analog [ALC272X Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC272X Analog [ALC272X Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  pgoodall   1372 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0x56440000 irq 44'
     Mixer name	: 'Realtek ALC272X'
     Components	: 'HDA:10ec0272,1025022c,00100001'
     Controls      : 14
     Simple ctrls  : 8
  DistroRelease: Ubuntu 10.10
  Frequency: Once a day.
  HibernationDevice: RESUME=UUID=145f27a9-859a-4987-8132-ac878c832747
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Alpha i386 (20100602.2)
  MachineType: Acer AO531h
  Package: linux (not installed)
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-6-generic root=UUID=11f96f8b-5e04-4e20-a201-0fa5d0fc07fa ro quiet splash
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_GB.utf8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.35-6.9-generic 2.6.35-rc3
  Regression: Yes
  RelatedPackageVersions: linux-firmware 1.37
  Reproducible: No
  Tags: maverick ubuntu-une kconfig regression-potential needs-upstream-testing
  Uname: Linux 2.6.35-6-generic i686
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  dmi.bios.date: 12/22/2009
  dmi.bios.vendor: Acer
  dmi.bios.version: v0.3304
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.vendor: Acer
  dmi.board.version: Base Board Version
  dmi.chassis.type: 1
  dmi.chassis.vendor: Chassis Manufacturer
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAcer:bvrv0.3304:bd12/22/2009:svnAcer:pnAO531h:pvr1:rvnAcer:rn:rvrBaseBoardVersion:cvnChassisManufacturer:ct1:cvrChassisVersion:
  dmi.product.name: AO531h
  dmi.product.version: 1
  dmi.sys.vendor: Acer

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