** Attachment added: "cosmic minimal image with linux-azure 4.18.0.1002.2 (from 
cosmic-proposed) boot log"
   
https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/1795017/+attachment/5195337/+files/chohv4Va7Ahx7-vm-imagedebug-boot.log

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https://bugs.launchpad.net/bugs/1795017

Title:
  linux-azure on cosmic minimal image boot speed

Status in linux-azure package in Ubuntu:
  New

Bug description:
  Hi,

  We're planning to share a new Cosmic minimal image for Azure including
  the linux-azure custom kernel.

  I have found boot speed increase from ~55s in non minimal image to
  over 6mins for minimal image.

  I have gathered boot log, systemd logs and cloud-init logs for this
  instance @ https://private-fileshare.canonical.com/~philroche/azure-
  cosmic-20180927/minimal/. You can see the same logs for the non
  minimal image @ https://private-fileshare.canonical.com/~philroche
  /azure-cosmic-20180927/base

  Most of the time seems to be spent in crng and "task swapper/0:1" (?)

  [    5.774760] sd 3:0:0:0: [sdc] Attached SCSI disk
  [   71.388989] random: crng init done
  [  242.656057] INFO: task swapper/0:1 blocked for more than 120 seconds.
  [  242.688434]       Not tainted 4.15.0-1018-azure #18-Ubuntu

  Source: https://private-fileshare.canonical.com/~philroche/azure-
  cosmic-20180927/minimal/iengal3seeSee-vm-imagedebug-boot.log

  Please let me know if you need any more information or would like me
  to launch an instance for testing.

  
  I understand that minimal images are intended to boot without initramfs but I 
did install initramfs-tools in another test image which did result in much 
better boot times.

  See https://private-fileshare.canonical.com/~philroche/azure-
  cosmic-20180928/ for logs.

  Minimal image boot time 48.784s

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