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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

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

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https://bugs.launchpad.net/bugs/1367296

Title:
  Software RAID1 gets stuck on data check

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Description:    Ubuntu 14.04.1 LTS
  Release:        14.04

  cat /proc/mdstat shows that md1 (swap) got stuck at 0% during the
  nightly data check of the RAID.

  In hope of stopping the sync I called

  /usr/share/mdadm/checkarray -x -a

  This was a bad idea as this command got stuck too and cat /proc/mdstat
  was useless afterwards as it did not show anything nor finish.

  No idea what to do as I fear a reboot will leave me with a damaged
  system.

  dmesg showed this multiple times :

  [4367634.910108] INFO: task md1_resync:16812 blocked for more than 120 seconds.
  [4367634.954575]       Not tainted 3.13.0-32-generic #57-Ubuntu
  [4367634.978601] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [4367635.028209] md1_resync      D ffff885fbf354440     0 16812      2 0x00000000
  [4367635.028225]  ffff8820386cbbf8 0000000000000002 ffff880dd3ce17f0 ffff8820386cbfd8
  [4367635.028230]  0000000000014440 0000000000014440 ffff880dd3ce17f0 ffff8825e4566d00
  [4367635.028232]  ffff885f75ea84f8 ffff8820386cbc70 ffff885f75ea84e0 ffff885f75ea8480
  [4367635.028235] Call Trace:
  [4367635.028248]  [<ffffffff817200d9>] schedule+0x29/0x70
  [4367635.028265]  [<ffffffffa0047437>] sync_request+0x227/0xb30 [raid1]
  [4367635.028270]  [<ffffffff810aaf00>] ? prepare_to_wait_event+0x100/0x100
  [4367635.028274]  [<ffffffff815a8d33>] md_do_sync+0x9a3/0xdd0
  [4367635.028277]  [<ffffffff815a58d8>] md_thread+0x118/0x130
  [4367635.028279]  [<ffffffff815a57c0>] ? mddev_unlock+0xe0/0xe0
  [4367635.028282]  [<ffffffff8108b3d2>] kthread+0xd2/0xf0
  [4367635.028284]  [<ffffffff8108b300>] ? kthread_create_on_node+0x1d0/0x1d0
  [4367635.028288]  [<ffffffff8172c5bc>] ret_from_fork+0x7c/0xb0
  [4367635.028290]  [<ffffffff8108b300>] ? kthread_create_on_node+0x1d0/0x1d0

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-32-generic 3.13.0-32.57
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
  Uname: Linux 3.13.0-32-generic x86_64
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Sep  3 12:31 seq
   crw-rw---- 1 root audio 116, 33 Sep  3 12:31 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.14.1-0ubuntu3.3
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: [Errno 2] No such file or directory: 'iw'
  Date: Tue Sep  9 15:12:19 2014
  HibernationDevice: RESUME=UUID=86aad4c3-b114-4aaa-9cb7-c47ddd1c4c75
  InstallationDate: Installed on 2014-07-07 (64 days ago)
  InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
  MachineType: Supermicro X9DRi-LN4+/X9DR3-LN4+
  PciMultimedia:
   
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=de_DE.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-32-generic root=UUID=223f3450-172e-43e3-b99f-205c21f39868 ro nomdmonddf nomdmonisw
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-32-generic N/A
   linux-backports-modules-3.13.0-32-generic  N/A
   linux-firmware                             1.127.5
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  WifiSyslog:
   
  dmi.bios.date: 05/27/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 3.0b
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: X9DRi-LN4+/X9DR3-LN4+
  dmi.board.vendor: Supermicro
  dmi.board.version: REV:1.20A
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 17
  dmi.chassis.vendor: Supermicro
  dmi.chassis.version: 0123456789
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3.0b:bd05/27/2014:svnSupermicro:pnX9DRi-LN4+/X9DR3-LN4+:pvr0123456789:rvnSupermicro:rnX9DRi-LN4+/X9DR3-LN4+:rvrREV1.20A:cvnSupermicro:ct17:cvr0123456789:
  dmi.product.name: X9DRi-LN4+/X9DR3-LN4+
  dmi.product.version: 0123456789
  dmi.sys.vendor: Supermicro

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