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[Bug 1185172] Re: kswapd0 high CPU usage and lagging system


The problem is still affecting me. I have no swap partition but at some
times computer starts lagging and disk start working as hell. top
command tells me chromium and kswapd usage is very high.

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  kswapd0  high CPU usage and lagging system

Status in “linux” package in Ubuntu:

Bug description:
  when the RAM is about to be full the kswapd0 process starts using very much CPU like 80-100%, and the system is unusable because of a severe lagging. What is interestin is that thunderbird seems to trigger this (e.g. when i shut down thunderbird everything comes ot normal, so let me know if you need to know the size of my thunderbird databases) more info on this comment https://bugs.launchpad.net/ubuntu/+source/linux/+bug/721896/comments/39

  When this is happening, the free -m outout looks liek this:

               total used free shared buffers cached
  Mem: 3920 3822 97 0 0 344
  -/+ buffers/cache: 3477 442
  Swap: 0 0 0

  WORKAROUND: Enabling 1Gb swap seems to solve this issue.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-22-generic 3.8.0-22.33
  ProcVersionSignature: Ubuntu 3.8.0-22.33-generic 3.8.11
  Uname: Linux 3.8.0-22-generic x86_64
  ApportVersion: 2.9.2-0ubuntu8
  Architecture: amd64
   /dev/snd/controlC0:  nick       2166 F.... pulseaudio
  Date: Wed May 29 00:08:11 2013
  InstallationDate: Installed on 2012-06-22 (340 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  MachineType: ASUSTeK Computer Inc. K50IJ
  MarkForUpload: True
   PATH=(custom, no user)
   0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-22-generic root=UUID=10fbfaa4-4532-4680-ab0f-13cf0cf1e40f ro loop.max_part=16 quiet splash vt.handoff=7
   linux-restricted-modules-3.8.0-22-generic N/A
   linux-backports-modules-3.8.0-22-generic  N/A
   linux-firmware                            1.106
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to raring on 2013-03-24 (65 days ago)
  dmi.bios.date: 05/08/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 207
  dmi.board.asset.tag: ATN12345678901234567
  dmi.board.name: K50IJ
  dmi.board.vendor: ASUSTeK Computer Inc.
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: ATN12345678901234567
  dmi.chassis.type: 10
  dmi.chassis.vendor: ASUSTeK Computer Inc.
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr207:bd05/08/2009:svnASUSTeKComputerInc.:pnK50IJ:pvr1.0:rvnASUSTeKComputerInc.:rnK50IJ:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
  dmi.product.name: K50IJ
  dmi.product.version: 1.0
  dmi.sys.vendor: ASUSTeK Computer Inc.

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