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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

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

** Tags added: kernel-request-3.13.0-24.46

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https://bugs.launchpad.net/bugs/1328595

Title:
  lvcreate -s hangs when overlayfs is in use

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I am using xbuntu 14.04 LTS in combination with KVM, lxc, logical volumes and overlayfs.
  After I started  using overlayfs i realized that my backup based on LVM snapshots made the system "go mad".

  As described in the manual I tried the kernel from 13.10 (3.11.0-xx) with the same result.
  A test against main line does not help, since it does not include the overlayfs support.

  I tested the behaviour on a server as well as in a VirtualBox environment with the same result:
  lvcreate -s -n backup -L512M /dev/VG/NAME hangs and does not come back.

  This issue is easy reproducable:

  sudo mkdir /mnt/test /mnt/delta
  sudo mount -t overlayfs -o lowerdir=/usr,upperdir=/mnt/delta overlayfs /mnt/test
  sudo lvcreate -s -n backup -L512M /dev/xubuntu-vg/root

  -> Hang
  df@feretti-virt:~$ uname -r
  3.13.0-29-generic

  df@feretti-virt:~$ cat /proc/version_signature 
  Ubuntu 3.13.0-29.53-generic 3.13.11.2

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-29-generic 3.13.0-29.53
  ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
  Uname: Linux 3.13.0-29-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D1c', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  Date: Tue Jun 10 18:02:13 2014
  HibernationDevice: RESUME=UUID=6e68761a-6768-4e19-9c4e-f188538d6068
  InstallationDate: Installed on 2014-02-18 (112 days ago)
  InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016)
  Lsusb:
   Bus 001 Device 002: ID 80ee:0021 VirtualBox USB Tablet
   Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: innotek GmbH VirtualBox
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-29-generic root=/dev/mapper/xubuntu--vg-root ro quiet splash vt.handoff=7
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-29-generic N/A
   linux-backports-modules-3.13.0-29-generic  N/A
   linux-firmware                             1.127.2
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-04-22 (49 days ago)
  dmi.bios.date: 12/01/2006
  dmi.bios.vendor: innotek GmbH
  dmi.bios.version: VirtualBox
  dmi.board.name: VirtualBox
  dmi.board.vendor: Oracle Corporation
  dmi.board.version: 1.2
  dmi.chassis.type: 1
  dmi.chassis.vendor: Oracle Corporation
  dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr:
  dmi.product.name: VirtualBox
  dmi.product.version: 1.2
  dmi.sys.vendor: innotek GmbH

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