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[Alex <alex.golonzovsky@xxxxxxxxx>]

Public bug reported:

I'm running AWS EC2 t2.micro instance with below ubuntu version. 
ubuntu-wily-15.10-amd64-server-20151203 (ami-7d948911) 
4.2.0-23-generic

Periodically around once per day my instance consumes 100% CPU by kswapd0 kernell process.
Instance restart helps, otherwise this continues. 

I have no swap configured.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-23-generic 4.2.0-23.28
ProcVersionSignature: User Name 4.2.0-23.28-generic 4.2.6
Uname: Linux 4.2.0-23-generic x86_64
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116,  1 Jan  9 07:44 seq
 crw-rw---- 1 root audio 116, 33 Jan  9 07:44 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.19.1-0ubuntu5
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: Sat Jan  9 20:32:49 2016
Ec2AMI: ami-7d948911
Ec2AMIManifest: (unknown)
Ec2AvailabilityZone: eu-central-1a
Ec2InstanceType: t2.micro
Ec2Kernel: unavailable
Ec2Ramdisk: unavailable
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99
MachineType: Xen HVM domU
PciMultimedia:
 
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB:
 0 cirrusdrmfb
 1 xen
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-23-generic root=UUID=73008cf2-451d-4df0-a2e6-16ffb91670c7 ro console=tty1 console=ttyS0
RelatedPackageVersions:
 linux-restricted-modules-4.2.0-23-generic N/A
 linux-backports-modules-4.2.0-23-generic  N/A
 linux-firmware                            1.149.3
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/07/2015
dmi.bios.vendor: Xen
dmi.bios.version: 4.2.amazon
dmi.chassis.type: 1
dmi.chassis.vendor: Xen
dmi.modalias: dmi:bvnXen:bvr4.2.amazon:bd12/07/2015:svnXen:pnHVMdomU:pvr4.2.amazon:cvnXen:ct1:cvr:
dmi.product.name: HVM domU
dmi.product.version: 4.2.amazon
dmi.sys.vendor: Xen

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug ec2-images wily

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https://bugs.launchpad.net/bugs/1532480

Title:
  kswapd0 consumes 100% CPU

Status in linux package in Ubuntu:
  New

Bug description:
  I'm running AWS EC2 t2.micro instance with below ubuntu version. 
  ubuntu-wily-15.10-amd64-server-20151203 (ami-7d948911) 
  4.2.0-23-generic

  Periodically around once per day my instance consumes 100% CPU by kswapd0 kernell process.
  Instance restart helps, otherwise this continues. 

  I have no swap configured.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-23-generic 4.2.0-23.28
  ProcVersionSignature: User Name 4.2.0-23.28-generic 4.2.6
  Uname: Linux 4.2.0-23-generic x86_64
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Jan  9 07:44 seq
   crw-rw---- 1 root audio 116, 33 Jan  9 07:44 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.19.1-0ubuntu5
  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: Sat Jan  9 20:32:49 2016
  Ec2AMI: ami-7d948911
  Ec2AMIManifest: (unknown)
  Ec2AvailabilityZone: eu-central-1a
  Ec2InstanceType: t2.micro
  Ec2Kernel: unavailable
  Ec2Ramdisk: unavailable
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
  Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99
  MachineType: Xen HVM domU
  PciMultimedia:
   
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB:
   0 cirrusdrmfb
   1 xen
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-23-generic root=UUID=73008cf2-451d-4df0-a2e6-16ffb91670c7 ro console=tty1 console=ttyS0
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-23-generic N/A
   linux-backports-modules-4.2.0-23-generic  N/A
   linux-firmware                            1.149.3
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/07/2015
  dmi.bios.vendor: Xen
  dmi.bios.version: 4.2.amazon
  dmi.chassis.type: 1
  dmi.chassis.vendor: Xen
  dmi.modalias: dmi:bvnXen:bvr4.2.amazon:bd12/07/2015:svnXen:pnHVMdomU:pvr4.2.amazon:cvnXen:ct1:cvr:
  dmi.product.name: HVM domU
  dmi.product.version: 4.2.amazon
  dmi.sys.vendor: Xen

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