[Bug 595047] Re: massive i/o renders the system unusable

[Pete Goodall]

apport information

** Tags added: apport-collected

** Description changed:

  Periodically I notice my system slows to a near stand still, and the
  hard drive light is constantly going.  This seems to be a massive amount
  of disk i/o and it lasts for a long time (lets say 30 mins to put a
  number on it).  I installed and ran iotop (`iotop -a`) and it seems to
  point to jbd2.  From what I can see jbd2 is related to ext4 journaling,
  but I cannot figure out how to kill this operation.  It might even be a
  red herring because I have also stopped the disk activity by kill either
  chromium or firefox.  I need to understand what else I can do to
  troubleshoot this.
  
  $ lsb_release -rd
  Description:	Ubuntu maverick (development branch)
  Release:	10.10
  
  Up-to-date as of 16th June 2010.
+ --- 
+ AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
+ AplayDevices:
+  **** List of PLAYBACK Hardware Devices ****
+  card 0: Intel [HDA Intel], device 0: ALC272X Analog [ALC272X Analog]
+    Subdevices: 1/1
+    Subdevice #0: subdevice #0
+ Architecture: i386
+ ArecordDevices:
+  **** List of CAPTURE Hardware Devices ****
+  card 0: Intel [HDA Intel], device 0: ALC272X Analog [ALC272X Analog]
+    Subdevices: 1/1
+    Subdevice #0: subdevice #0
+ AudioDevicesInUse:
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC0:  pgoodall   1372 F.... pulseaudio
+ CRDA: Error: [Errno 2] No such file or directory
+ Card0.Amixer.info:
+  Card hw:0 'Intel'/'HDA Intel at 0x56440000 irq 44'
+    Mixer name	: 'Realtek ALC272X'
+    Components	: 'HDA:10ec0272,1025022c,00100001'
+    Controls      : 14
+    Simple ctrls  : 8
+ DistroRelease: Ubuntu 10.10
+ Frequency: Once a day.
+ HibernationDevice: RESUME=UUID=145f27a9-859a-4987-8132-ac878c832747
+ InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Alpha i386 (20100602.2)
+ MachineType: Acer AO531h
+ Package: linux (not installed)
+ ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-6-generic root=UUID=11f96f8b-5e04-4e20-a201-0fa5d0fc07fa ro quiet splash
+ ProcEnviron:
+  PATH=(custom, user)
+  LANG=en_GB.utf8
+  SHELL=/bin/bash
+ ProcVersionSignature: Ubuntu 2.6.35-6.9-generic 2.6.35-rc3
+ Regression: Yes
+ RelatedPackageVersions: linux-firmware 1.37
+ Reproducible: No
+ Tags: maverick ubuntu-une kconfig regression-potential needs-upstream-testing
+ Uname: Linux 2.6.35-6-generic i686
+ UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
+ dmi.bios.date: 12/22/2009
+ dmi.bios.vendor: Acer
+ dmi.bios.version: v0.3304
+ dmi.board.asset.tag: Base Board Asset Tag
+ dmi.board.vendor: Acer
+ dmi.board.version: Base Board Version
+ dmi.chassis.type: 1
+ dmi.chassis.vendor: Chassis Manufacturer
+ dmi.chassis.version: Chassis Version
+ dmi.modalias: dmi:bvnAcer:bvrv0.3304:bd12/22/2009:svnAcer:pnAO531h:pvr1:rvnAcer:rn:rvrBaseBoardVersion:cvnChassisManufacturer:ct1:cvrChassisVersion:
+ dmi.product.name: AO531h
+ dmi.product.version: 1
+ dmi.sys.vendor: Acer

** Attachment added: "AlsaDevices.txt"
   http://launchpadlibrarian.net/51504804/AlsaDevices.txt

-- 
massive i/o renders the system unusable
https://bugs.launchpad.net/bugs/595047
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