[Bug 1185394] Re: systemd-udev fails when processing many logical volumes on boot

[Stefan Bader]

Now done another 5 reboots with the udev script in init-bottom doing a
"udevadm settle --timeout=121" before the exit. The delay before init-
bottom finishes seem the same (or even a little bit quicker) than
before, a ps after the exit has no udevd or vgscan/vgchange processes
running (with only udevadm exit there were multiple of those with the
watershed parent gone), and all logical volumes are set up correctly.

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https://bugs.launchpad.net/bugs/1185394

Title:
  systemd-udev fails when processing many logical volumes on boot

Status in “systemd” package in Ubuntu:
  In Progress

Bug description:
  With recent systemd/udev updates in Saucy I see problems when /dev
  gets moved to the real root. It seems to be related to running
  vgscan/vgchange through watershed by systemd-udevd. The symptoms
  include a crash of one systemd-udevd process and several messages
  about systemd-udevd (or childs of it) not finding files in /dev.

  Setup:

  sda: contains the root fs (no separate /boot) and a swap partition
  sdb: contains vg1 with /home
  sdc and sdd: contain vg2 with 31 LVs, one of them mounted to /home/isos

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