kernel-packages team mailing list archive

[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

** Changed in: linux (Ubuntu)
       Status: New => Confirmed

-- 
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/1290337

Title:
  I/O slow down on 32-bit PAE systems

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Symptoms are that as time goes by I/O gets slower and slower (primarily if not even only writes rather than reads).  
  It can be temporarily cured via  /sbin/sysctl -w vm.drop_caches=2 and/or  /sbin/sysctl -w vm.drop_caches=3 but the problem will re-appear again sooner rather than later.
  The problem seems also somewhat proportional on how much RAM is allocated. It does not seem to appear with less than 8GB (i.e., i saw it first when switching to a 16GB laptop/ThinkPad w530) and is considerably worse when allowing all memory compared to, e.g., by using only ~14GB using the mem=14000M  boot option.
  The issue shows up at least since 12.10

  This is almost certainly the same bug as
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1107150 but as
  that bug is now strangely closed and i got told to open a new one,
  here we go ...

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image-3.11.0-18-generic 3.11.0-18.32
  ProcVersionSignature: Ubuntu 3.11.0-18.32-generic 3.11.10.4
  Uname: Linux 3.11.0-18-generic i686
  NonfreeKernelModules: nvidia wl
  ApportVersion: 2.12.5-0ubuntu2.2
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  msteiner   4131 F.... pulseaudio
   /dev/snd/controlC0:  msteiner   4131 F.... pulseaudio
   /dev/snd/pcmC0D0p:   msteiner   4131 F...m pulseaudio
   /dev/snd/seq:        timidity   3237 F.... timidity
  CRDA:
   country IN:
   	(2402 - 2482 @ 40), (N/A, 20)
   	(5170 - 5250 @ 40), (N/A, 20)
   	(5250 - 5330 @ 40), (N/A, 20), DFS
   	(5735 - 5835 @ 40), (N/A, 20)
  Date: Mon Mar 10 17:47:12 2014
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=4a17fffe-b487-4abf-9df8-1846a925cf4b
  MachineType: LENOVO 2449A35
  MarkForUpload: True
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.11.0-18-generic root=/dev/mapper/babbage2-root ro acpi_osi=Linux mem=14000M nox2apic rcutree.rcu_idle_gp_delay=1
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-18-generic N/A
   linux-backports-modules-3.11.0-18-generic  N/A
   linux-firmware                             1.116.2
  SourcePackage: linux
  UpgradeStatus: Upgraded to saucy on 2013-10-25 (135 days ago)
  dmi.bios.date: 05/24/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G5ET93WW (2.53 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2449A35
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrG5ET93WW(2.53):bd05/24/2013:svnLENOVO:pn2449A35:pvrThinkPadW530:rvnLENOVO:rn2449A35:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2449A35
  dmi.product.version: ThinkPad W530
  dmi.sys.vendor: LENOVO

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1290337/+subscriptions