kernel-packages team mailing list archive

[佐伯 浩 <h-saeki@xxxxxxxxxxxxxxxxx>]

Tag : 'kernel-fixed-upstream'

Hi,  Joseph Salisbury (jsalisbury).

I tested with Ver. 3.16 kernel.

I test ran for fourty minutes.

To see with 'top' command, the kernel consumes as cache memory 700MB.

First it consumed 500MB and after thirty minutes, 700MB was consumed.
To release cache memory with 'cache_release.sh', cosumed cache memory became 100MB.
It seems to me, as for Ver. 3.16 kernel, cache memory management bug is already fixed.

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https://bugs.launchpad.net/bugs/1331186

Title:
  Ubuntu Linux kernel memory leak, cache memory trouble

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  As soon as I start Ubuntu 12.04.4 LTS with i386 PAE kernel, 8GB memory, GNU/Linux 3.2.0-64-generic-pae i686,
  cache memory area  increases a little by a little, and It consumes at last, a few hours later, 5GB memory. User memory left will become 200MB.

  I release cache memory by issuing a shell script, cache_release.sh. It
  is  like that :

  #!/bin/bash

  /bin/sync
  /bin/sync
  /bin/sync
  /bin/sync
  /bin/sync

  /sbin/sysctl -w vm.drop_caches=1
  /sbin/sysctl -w vm.drop_caches=2
  /sbin/sysctl -w vm.drop_caches=3

  I registered this shell script to crontab and I issue this script
  command once a hour.

  Maybe kernel requires patches.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-64-generic-pae 3.2.0-64.97
  ProcVersionSignature: Ubuntu 3.2.0-64.97-generic-pae 3.2.59
  Uname: Linux 3.2.0-64-generic-pae i686
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: ALC665 Analog [ALC665 Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  hiroshi    4448 F.... pulseaudio
   /dev/snd/controlC0:  hiroshi    4448 F.... pulseaudio
   /dev/snd/pcmC0D0p:   hiroshi    4448 F...m pulseaudio
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf0a00000 irq 57'
     Mixer name	: 'Realtek ALC665'
     Components	: 'HDA:10ec0665,1028046e,00100003'
     Controls      : 26
     Simple ctrls  : 13
  Card1.Amixer.info:
   Card hw:1 'NVidia'/'HDA NVidia at 0xcdefc000 irq 17'
     Mixer name	: 'Nvidia GPU 14 HDMI/DP'
     Components	: 'HDA:10de0014,10de0101,00100100'
     Controls      : 24
     Simple ctrls  : 4
  Date: Wed Jun 18 05:27:20 2014
  HibernationDevice: RESUME=UUID=02e8790f-b82d-416f-8a25-de64b1bac6e9
  InstallationMedia: Ubuntu 12.04 "Precise" - Build i386 LIVE Binary 20120501-03:27
  MachineType: Dell Inc. XPS L501X
  MarkForUpload: True
  ProcFB:

  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-64-generic-pae root=UUID=1dff47dd-b881-4de7-b290-b74b48753d63 ro quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-64-generic-pae N/A
   linux-backports-modules-3.2.0-64-generic-pae  N/A
   linux-firmware                                1.79.15
  SourcePackage: linux
  StagingDrivers: mei
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/26/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A08
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A08
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A08
  dmi.modalias: dmi:bvnDellInc.:bvrA08:bd07/26/2011:svnDellInc.:pnXPSL501X:pvrA08:rvnDellInc.:rn:rvrA08:cvnDellInc.:ct8:cvrA08:
  dmi.product.name: XPS L501X
  dmi.product.version: A08
  dmi.sys.vendor: Dell Inc.

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