** Description changed:

- I'm running AWS EC2 t2.micro instance with below ubuntu version. 
- ubuntu-wily-15.10-amd64-server-20151203 (ami-7d948911) 
+ 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. 
+ Instance restart helps, otherwise this continues.
  
  I have no swap configured.
+ 
+ Could be related to #721896
  
  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
+  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
+  TERM=xterm-256color
+  PATH=(custom, no user)
+  XDG_RUNTIME_DIR=<set>
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  ProcFB:
-  0 cirrusdrmfb
-  1 xen
+  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
+  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

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1532480

Title:
  kswapd0 consumes 100% CPU

Status in linux package in Ubuntu:
  Confirmed

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.

  Could be related to #721896

  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

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1532480/+subscriptions

-- 
Mailing list: https://launchpad.net/~kernel-packages
Post to     : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp

Reply via email to