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[DiagonalArg <1071012@xxxxxxxxxxxxxxxxxx>]

I'm having similar problems trying to copy 1/2T of data. The system is
repeatedly freezing during a "cp" command.  (12.04.2, fully updated.)

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https://bugs.launchpad.net/bugs/1071012

Title:
  Hard Freeze (Kernel Panic) During Heavy Disk I/O on ext4

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  During heavy disk write activity (eg. swapping, writing large files to
  disk), the system freezes hard (becomes 100% unresponsive) with the
  CPU fan spun up high, and stays that way until a hard reset.

  I've noticed this problem under two separate installs of 12.04 64-bit,
  on two different SSDs. There seems to be some race condition exposed
  by the pure speed of the writes?

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-32-generic 3.2.0-32.51
  ProcVersionSignature: Ubuntu 3.2.0-32.51-generic 3.2.30
  Uname: Linux 3.2.0-32-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu14
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: VT1802 Analog [VT1802 Analog]
     Subdevices: 2/2
     Subdevice #0: subdevice #0
     Subdevice #1: subdevice #1
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  tom        2101 F.... pulseaudio
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xf7e10000 irq 45'
     Mixer name	: 'Intel PantherPoint HDMI'
     Components	: 'HDA:11068446,15582702,00100000 HDA:80862806,15582702,00100000'
     Controls      : 33
     Simple ctrls  : 18
  Date: Wed Oct 24 15:24:35 2012
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=8b07a0c0-c9d4-4e2d-b6a0-f4c83e095727
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
  MachineType: System76, Inc. Gazelle Professional
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-32-generic root=UUID=9aca9502-5d32-4ca7-b011-f53d95eb5d65 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-32-generic N/A
   linux-backports-modules-3.2.0-32-generic  N/A
   linux-firmware                            1.79.1
  RfKill:
   0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  SourcePackage: linux
  StagingDrivers: mei
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/16/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 4.6.5
  dmi.board.asset.tag: Tag 12345
  dmi.board.name: Gazelle Professional
  dmi.board.vendor: System76, Inc.
  dmi.board.version: gazp7
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: No Enclosure
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd05/16/2012:svnSystem76,Inc.:pnGazelleProfessional:pvrgazp7:rvnSystem76,Inc.:rnGazelleProfessional:rvrgazp7:cvnNoEnclosure:ct9:cvrN/A:
  dmi.product.name: Gazelle Professional
  dmi.product.version: gazp7
  dmi.sys.vendor: System76, Inc.

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