[Bug 1463023] Re: systemd Timed out waiting for device swap and file system check

[Thomas Dreibholz]

I have noticed this problem on 2 machines upgraded from Ubuntu 14.04 to Ubuntu 16.04, when trying to boot the upgraded system for the first time. The really bad issue is that after timing out, the system is going to hang with messages like:
[58Z?Z1.5?Z840] INFO task systemd:21547 blocked for more than 120 seconds.
This is particularly bad if the system is remote.

(sysctls to consider these hangs as panics, and reboot a paniced kernel
automatically end in a loop: boot -> mount problem -> hang -> reboot ->
...)

Unfortunately, I was not able to find out what actually caused the
mounting problem (in my case: /home and swap). Booting from CD did not
reveal anything interesting (manually did fsck), and after rebooting
again it worked without problems.

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Title:
  systemd Timed out waiting for device swap and file system check

Status in systemd package in Ubuntu:
  Invalid

Bug description:
  
  My Ubuntu 15.04 did not start --or took so long that I switched back to upstart!

  ISSUE: (systemd during the boot)

  Timed out waitingfor device dev-disk-by\x2duuid-... (swap)
  Dependency failed for /dev/disk/by-uuid/... (swap)
  Dependency failed for Swap.
  Timed out waiting for device dev-sdaX.device    (swap)
  Dependency failed for Swap Partition.
  Failed to start udev Wait for Complete Device Initialization.
  See "systemctl status systemd-udev-settle.service" for details.
      Starting File System Check on Root Device...
      Starting Copy rules generated while the root was ro...
  (1 of 2) A start job is running for File System Check on Root Device (3min 28s / no limit)
  ...
       No tainted 3.19.0-18-generic #18-Ubuntu
  "echo 0> /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  INFO: task systemd-udevd:336 blocked for more than 120 seconds.
  ...
  INFO: task systemd-udevd:338 blocked for more than 120 seconds.
  ...
  INFO: task systemd-udevd:346 blocked for more than 120 seconds.
  ...
  (1 of 2) A start job is running for File System Check on Root Device (4min 3s / no limit)

  WORKAROUND:

  apt-get -qq -y install upstart-sysv # switch back to upstart
  http://linux.softpedia.com/blog/Ubuntu-15-04-Users-Can-Switch-Off-Systemd-and-Use-Upstart-479373.shtml
  P.S. don't ask me to go back to systemd-sysv... I am fine with upstart....

  TECHNICAL DETAILS:

  $ lsb_release -r
  Release:	15.04

  $ uname -r
  3.19.0-18-generic

  $ sudo dmidecode -s system-product-name
  MacBookPro8,2

  $ grep "^GRUB_CMDLINE_LINUX_DEFAULT" /etc/default/grub
  GRUB_CMDLINE_LINUX_DEFAULT="transparent_hugepage=always intel_iommu=on acpi_irq_nobalance cgroup_enable=memory swapaccount=1 libata.force=noncq modeset=1 hybridopts=ON,IGD,OFF i915.modeset=0 radeon.modeset=1 radeon.dpm=1 radeon.audio=1 i915.lvds_channels=2 quirks.mbp_force_ahci=1 acpi_backlight=vendor reboot=pci"

  $ cat /etc/fstab
  # <file system> <mount point>   <type>  <options>       <dump>  <pass>
  # / was on /dev/sda5 during installation
  UUID=6619a7e9-4b94-4e9b-8dbe-4110f89dde74 /               ext4    errors=remount-ro 0       1
  # swap was on /dev/sda6 during installation
  UUID=813e9dc2-c678-4959-ac89-e6660f886942 none            swap    sw              0       0

  # lsblk -f
  NAME   FSTYPE  LABEL        UUID                                 MOUNTPOINT
  sda                                                              
  ├─sda1 vfat    EFI          67E3-17ED                            
  ├─sda2 hfsplus Macintosh HD 2ba5bbc1-fff0-36ea-ade4-140386274279 
  ├─sda3 hfsplus Recovery HD  9e776f16-ceb4-37e6-b4ce-4e75c1db5444 
  ├─sda4                                                           
  ├─sda5 ext4                 6619a7e9-4b94-4e9b-8dbe-4110f89dde74 /
  └─sda6 swap                 813e9dc2-c678-4959-ac89-e6660f886942 [SWAP]
  sr0   

  # blkid 
  /dev/sda1: LABEL="EFI" UUID="67E3-17ED" TYPE="vfat" PARTLABEL="EFI System Partition" PARTUUID="5d71ff71-9843-473d-90e7-4c780c8a494d"
  /dev/sda2: UUID="2ba5bbc1-fff0-36ea-ade4-140386274279" LABEL="Macintosh HD" TYPE="hfsplus" PARTLABEL="Macintosh HD" PARTUUID="4e4c2249-24f8-4229-9325-d4aafd7ac093"
  /dev/sda3: UUID="9e776f16-ceb4-37e6-b4ce-4e75c1db5444" LABEL="Recovery HD" TYPE="hfsplus" PARTLABEL="Recovery HD" PARTUUID="a986e3e1-ed3b-44bb-a75b-87b54434380d"
  /dev/sda5: UUID="6619a7e9-4b94-4e9b-8dbe-4110f89dde74" TYPE="ext4" PARTUUID="9d860cb1-1334-4f79-a07a-01b8818c4aab"
  /dev/sda6: UUID="813e9dc2-c678-4959-ac89-e6660f886942" TYPE="swap" PARTUUID="bf1271f6-8d51-4510-8979-666c9546f1f3"
  /dev/sda4: PARTUUID="2b731a42-bd29-4548-8f0e-a9889ee9486b"

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