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[Viktor Pal <1462919@xxxxxxxxxxxxxxxxxx>]

I experience the same on desktop (15.04)  maybe once a week.
I presume that this happens when some laking application starts to eat up all the memory quickly.
When this happens the whole machine gets unresponsive immediately and only restarting helps.
It only turns out from the atop logs what happened after the machine was restarted. Atop is configured to run every 30 secs.
It is visible from the atop logs that kswapd0 is eating up all the cpu resources.
Strange thing is that this happens despite there is no swap enabled.

I suppose what should happen is that the kernel OOMs and kills some application and everything is back to normal.
What happens though is that the machine dies. Of course every unsaved work and open windows and applications are lost, which is very unfortunate.

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https://bugs.launchpad.net/bugs/1462919

Title:
  kswapd pulls server down every 2 weeks.

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  in 15.04 even when having plenty of RAM and swap kswpd uses lots of
  CPU and might bring the machine down to a crawl making is unable to
  access it over the network.

  I say "might", because it's only a very clear feeling that I have. I
  do not know it for sure.

  Anyway the fact is that I have two server that once every 2 week ends
  up totally unaccessible from the network. They can be pinged though.
  Logging in locally takes a long time. Rebooting them locally takes a
  long time. They have absolutely no noticeable disk IO when in this
  stalled state.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-16-generic 3.19.0-16.16
  ProcVersionSignature: Ubuntu 3.19.0-18.18-generic 3.19.6
  Uname: Linux 3.19.0-18-generic x86_64
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 jun  8 09:57 seq
   crw-rw---- 1 root audio 116, 33 jun  8 09:57 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  Date: Mon Jun  8 10:02:44 2015
  HibernationDevice: RESUME=UUID=17183f57-6587-47f2-84dc-553f7e5cf3a8
  IwConfig:
   eth0      no wireless extensions.
   
   eth1      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: Intel Corporation S5520UR
  PciMultimedia:
   
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-18-generic root=/dev/mapper/vg0-root ro nomdmonddf nomdmonisw crashkernel=384M-:128M nomdmonddf nomdmonisw crashkernel=384M-:128M nomdmonddf nomdmonisw crashkernel=384M-:128M nomdmonddf nomdmonisw crashkernel=384M-:128M nomdmonddf nomdmonisw crashkernel=384M-:128M
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-18-generic N/A
   linux-backports-modules-3.19.0-18-generic  N/A
   linux-firmware                             1.143.1
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-05-16 (22 days ago)
  dmi.bios.date: 12/17/2009
  dmi.bios.vendor: Intel Corp.
  dmi.bios.version: S5500.86B.01.00.0046.121720091524
  dmi.board.asset.tag: ....................
  dmi.board.name: S5520UR
  dmi.board.vendor: Intel Corporation
  dmi.board.version: E22554-606
  dmi.chassis.asset.tag: ....................
  dmi.chassis.type: 23
  dmi.chassis.vendor: ...............................
  dmi.chassis.version: ..................
  dmi.modalias: dmi:bvnIntelCorp.:bvrS5500.86B.01.00.0046.121720091524:bd12/17/2009:svnIntelCorporation:pnS5520UR:pvr....................:rvnIntelCorporation:rnS5520UR:rvrE22554-606:cvn...............................:ct23:cvr..................:
  dmi.product.name: S5520UR
  dmi.product.version: ....................
  dmi.sys.vendor: Intel Corporation

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