Public bug reported:

Seeing chunk extent read failures on what I believe is a MAAS installer
boot:

Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/datasource: Error retrieving chunk 
extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/data/previous-datasource: Error retrieving chunk 
extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/data/instance-id: Error retrieving chunk extents: 
Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/data/previous-instance-id: Error retrieving chunk 
extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instance/obj.pkl: Error retrieving chunk extents: 
Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/user-data.txt: Error retrieving 
chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/user-data.txt.i: Error retrieving 
chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/vendor-data.txt: Error retrieving 
chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/vendor-data.txt.i: Error retrieving 
chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/consume_data: Error retrieving 
chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instance/scripts/user_data.sh: Error retrieving chunk 
extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/vendor-cloud-config.txt: Error 
retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/config_ubuntu_init_switch: Error 
retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/config_seed_random: Error 
retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/config_write_files: Error 
retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/config_set_hostname: Error 
retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/hostname: Error 
retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/data/previous-hostname: Error retrieving chunk 
extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/config_ca_certs: Error 
retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/config_rsyslog: Error retrieving 
chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/rsyslog.d/20-cloud-config.conf: Error retrieving chunk extents: 
Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/config_users_groups: Error 
retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/gshadow: Error 
retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/shadow: Error 
retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/home/ubuntu/.profile: 
Error retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/home/ubuntu/.bash_logout: Error retrieving chunk extents: Operation 
not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/home/ubuntu/.bashrc: 
Error retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/passwd-: Error 
retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/shadow-: Error 
retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/group-: Error 
retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/gshadow-: Error 
retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/subuid-: Error 
retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/subgid-: Error 
retrieving chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/sudoers.d/90-cloud-init-users: Error retrieving chunk extents: 
Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/config_ssh: Error retrieving 
chunk extents: Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/ssh/ssh_host_rsa_key: Error retrieving chunk extents: Operation 
not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/ssh/ssh_host_rsa_key.pub: Error retrieving chunk extents: 
Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/ssh/ssh_host_dsa_key: Error retrieving chunk extents: Operation 
not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/ssh/ssh_host_dsa_key.pub: Error retrieving chunk extents: 
Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/ssh/ssh_host_ecdsa_key: Error retrieving chunk extents: 
Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/ssh/ssh_host_ecdsa_key.pub: Error retrieving chunk extents: 
Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/ssh/ssh_host_ed25519_key: Error retrieving chunk extents: 
Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/ssh/ssh_host_ed25519_key.pub: Error retrieving chunk extents: 
Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/home/ubuntu/.ssh/authorized_keys: Error retrieving chunk extents: 
Operation not supported
Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/root/.ssh/authorized_keys: Error retrieving chunk extents: 
Operation not supported

** Affects: linux (Ubuntu)
     Importance: Medium
         Status: Confirmed

** Affects: ureadahead (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: kernel-4.8

** Also affects: linux (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu)
       Status: New => Confirmed

** Changed in: linux (Ubuntu)
   Importance: Undecided => Medium

** Tags added: kernel4.8

** Tags removed: kernel4.8
** Tags added: kernel-4.8

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https://bugs.launchpad.net/bugs/1628438

Title:
  seeing "Error reading chunk events: Operation not supported" on MAAS
  boot

Status in linux package in Ubuntu:
  Confirmed
Status in ureadahead package in Ubuntu:
  New

Bug description:
  Seeing chunk extent read failures on what I believe is a MAAS
  installer boot:

  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/datasource: Error retrieving chunk 
extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/data/previous-datasource: Error retrieving chunk 
extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/data/instance-id: Error retrieving chunk extents: 
Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/data/previous-instance-id: Error retrieving chunk 
extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instance/obj.pkl: Error retrieving chunk extents: 
Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/user-data.txt: Error retrieving 
chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/user-data.txt.i: Error retrieving 
chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/vendor-data.txt: Error retrieving 
chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/vendor-data.txt.i: Error retrieving 
chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/consume_data: Error retrieving 
chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instance/scripts/user_data.sh: Error retrieving chunk 
extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/vendor-cloud-config.txt: Error 
retrieving chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/config_ubuntu_init_switch: Error 
retrieving chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/config_seed_random: Error 
retrieving chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/config_write_files: Error 
retrieving chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/config_set_hostname: Error 
retrieving chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/hostname: Error 
retrieving chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/data/previous-hostname: Error retrieving chunk 
extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/config_ca_certs: Error 
retrieving chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/config_rsyslog: Error retrieving 
chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/rsyslog.d/20-cloud-config.conf: Error retrieving chunk extents: 
Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/config_users_groups: Error 
retrieving chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/gshadow: Error 
retrieving chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/shadow: Error 
retrieving chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/home/ubuntu/.profile: Error retrieving chunk extents: Operation not 
supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/home/ubuntu/.bash_logout: Error retrieving chunk extents: Operation 
not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/home/ubuntu/.bashrc: 
Error retrieving chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/passwd-: Error 
retrieving chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/shadow-: Error 
retrieving chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/group-: Error 
retrieving chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/gshadow-: Error 
retrieving chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/subuid-: Error 
retrieving chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: ureadahead:/etc/subgid-: Error 
retrieving chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/sudoers.d/90-cloud-init-users: Error retrieving chunk extents: 
Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/var/lib/cloud/instances/rs3me7/sem/config_ssh: Error retrieving 
chunk extents: Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/ssh/ssh_host_rsa_key: Error retrieving chunk extents: Operation 
not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/ssh/ssh_host_rsa_key.pub: Error retrieving chunk extents: 
Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/ssh/ssh_host_dsa_key: Error retrieving chunk extents: Operation 
not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/ssh/ssh_host_dsa_key.pub: Error retrieving chunk extents: 
Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/ssh/ssh_host_ecdsa_key: Error retrieving chunk extents: 
Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/ssh/ssh_host_ecdsa_key.pub: Error retrieving chunk extents: 
Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/ssh/ssh_host_ed25519_key: Error retrieving chunk extents: 
Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/etc/ssh/ssh_host_ed25519_key.pub: Error retrieving chunk extents: 
Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/home/ubuntu/.ssh/authorized_keys: Error retrieving chunk extents: 
Operation not supported
  Sep 27 23:13:57 clear-teal ureadahead[1066]: 
ureadahead:/root/.ssh/authorized_keys: Error retrieving chunk extents: 
Operation not supported

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