[Bug 833891] Re: lvscan often times out during boot

[Serge Hallyn]

Quoting Kees Cook (kees at ubuntu.com):
> It might be interesting to see if races are solved (or introduced) by
> having watershed itself offer a "daemonize" option to put itself in the
> background and immediately return to the caller (udev). This may solve it.

Kees, do you think it will introduce problems if the vgchange returns
an error but, now that watershed daemonizes and does not propagate
vgchange's exit status, the udev rule doesn't see it?

It seems to me there's no graceful recovery from that anyway so it
shouldn't really matter, but clearly I could be missing something.

thanks,
-serge

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https://bugs.launchpad.net/bugs/833891

Title:
  lvscan often times out during boot

Status in “udev” package in Ubuntu:
  Confirmed

Bug description:
  I'm not 100% certain that mountall is the problem, but seems a good
  place to start.

  I have some LVM partitions on my laptop, and some filesystems on there
  are mounted through fstab:

  /dev/schroots/schroots /srv/devel ext3 defaults,relatime 0 0
  /dev/schroots/isos /iso ext4 defaults,relatime 0 0

  Often (1/3 of the time?) boot hangs, and after a minute or so I get a
  message saying something about watershed and lvscan timing out.  Then
  it proceeds to mount everything readonly.

  Other times boot proceeds with no problem.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: mountall 2.31
  ProcVersionSignature: Ubuntu 3.0.0-9.12-generic 3.0.3
  Uname: Linux 3.0.0-9-generic x86_64
  NonfreeKernelModules: nvidia
  Architecture: amd64
  Date: Thu Aug 25 10:56:52 2011
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110627.1)
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: mountall
  UpgradeStatus: No upgrade log present (probably fresh install)

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