[Bug 802626] Re: vgchange may deadlock in initramfs when VG present that's not used for rootfs

[James Keber]

Steve,
Several corresponding root-in-lvm lvm-udev timeout/deadlock bugs have been placed (including bug #902491, bug #912876, bug #909805), but all - at least superficially - appear to be as a result of the same udev/lvm deadlock as this bug, and all are fixed (or at least ameliorated) by the lvm "--noudevsync" work-around. Admittedly this could just be masking the true cause...

Obviously I defer to you; could you please glance-over bug #902491 and
authoritatively decide if it (and the others) needs to be a separate bug
(given the similarity of cause and of solution)?

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https://bugs.launchpad.net/bugs/802626

Title:
  vgchange may deadlock in initramfs when VG present that's not used for
  rootfs

Status in “lvm2” package in Ubuntu:
  Triaged
Status in “udev” package in Ubuntu:
  Confirmed
Status in “lvm2” source package in Oneiric:
  Triaged
Status in “udev” source package in Oneiric:
  Confirmed

Bug description:
  The system is now unable to boot.
  I had to boot on previous kernel 3.0.0.
  Symptoms are boot freezes. When debugging, issuing a vgscan works ok.
  doing the vgchange -a y just hangs. I need to reboot the system afterwards.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: lvm2 2.02.66-4ubuntu2
  ProcVersionSignature: Ubuntu 3.0-0.1-generic 3.0.0-rc2
  Uname: Linux 3.0-0-generic x86_64
  Architecture: amd64
  Date: Mon Jun 27 18:15:46 2011
  ProcEnviron:
   LANGUAGE=fr_FR:en
   PATH=(custom, user)
   LANG=fr_FR.utf8
   LC_MESSAGES=fr_FR.UTF-8
   SHELL=/bin/bash
  SourcePackage: lvm2
  UpgradeStatus: No upgrade log present (probably fresh install)

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