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[Bug 588046] Re: "task blocked for more than 120 seconds" freezes system in Lucid: xfs

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <588046@xxxxxxxxxxxxxxxxxx>
Date: Thu, 23 Jan 2014 04:17:39 -0000
Reply-to: Bug 588046 <588046@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/588046

Title:
  "task blocked for more than 120 seconds" freezes system in Lucid: xfs

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  I get "INFO: task xfsdatad/0:3344 blocked for more than 120 seconds." with  subsequent freeze when doing disk I/O on a single or two xfs partitions. 
  This is yet another variant of bug #494476, where emphasis is on ext4 and possible other processes causing the bug to appear. Reading this and bug #276476, my impression is that it is triggered by disk I/O, no matter the filesystem.

  In on instance, I tried to unrar a large file. After processing 80% of the archive, the process got stuck, the filesystem became unusable ("ls" on other console freezing as well), only reboot helped. Of course, the simple 'shutdown' commend doesn't finish, so that's actually a hard reset.
  The second instance was during a copy of several Gig from one xfs partition to another. Same symptoms.

  Given that only a reset resolves the situation, this might eventually
  lead to damaged file systems and data loss.

  This system has been upgraded to 10.04 via 9.10 from 9.04. The problem
  _did not_ occur under 9.04.

  -----------------------------------------------------------
  ay 31 09:55:22 tirion kernel: [ 2160.252098] INFO: task xfsdatad/0:3344 blocked for more than 120 seconds.
  May 31 09:55:22 tirion kernel: [ 2160.252108] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  May 31 09:55:22 tirion kernel: [ 2160.252117] xfsdatad/0    D 0001674e     0  3344      2 0x00000000
  May 31 09:55:22 tirion kernel: [ 2160.252132]  f5205ec4 00000046 f5d72000 0001674e 00000000 c0846740 f605b5ec c0846740
  May 31 09:55:22 tirion kernel: [ 2160.252153]  6b8e4857 000001d5 c0846740 c0846740 f605b5ec c0846740 c0846740 f6668a80
  May 31 09:55:22 tirion kernel: [ 2160.252173]  00000000 000001d5 f605b340 f5205ef8 f605b340 f5b890e4 f5205ef0 c058b315
  May 31 09:55:22 tirion kernel: [ 2160.252192] Call Trace:
  May 31 09:55:22 tirion kernel: [ 2160.252215]  [<c058b315>] rwsem_down_failed_common+0x75/0x1a0
  May 31 09:55:22 tirion kernel: [ 2160.252228]  [<c058b45d>] rwsem_down_write_failed+0x1d/0x30
  May 31 09:55:22 tirion kernel: [ 2160.252241]  [<c058b4f6>] call_rwsem_down_write_failed+0x6/0x10
  May 31 09:55:22 tirion kernel: [ 2160.252252]  [<c058aa14>] ? down_write+0x24/0x30
  May 31 09:55:22 tirion kernel: [ 2160.252315]  [<f8dfa2c0>] xfs_ilock+0x70/0x90 [xfs]
  May 31 09:55:22 tirion kernel: [ 2160.252366]  [<f8e1b180>] xfs_setfilesize+0x30/0x70 [xfs]
  May 31 09:55:22 tirion kernel: [ 2160.252415]  [<f8e1b413>] xfs_end_bio_delalloc+0x13/0x20 [xfs]
  May 31 09:55:22 tirion kernel: [ 2160.252466]  [<c016369e>] run_workqueue+0x8e/0x150
  May 31 09:55:22 tirion kernel: [ 2160.252516]  [<f8e1b400>] ? xfs_end_bio_delalloc+0x0/0x20 [xfs]
  May 31 09:55:22 tirion kernel: [ 2160.252529]  [<c01637e4>] worker_thread+0x84/0xe0
  May 31 09:55:22 tirion kernel: [ 2160.252542]  [<c0167740>] ? autoremove_wake_function+0x0/0x50
  May 31 09:55:22 tirion kernel: [ 2160.252554]  [<c0163760>] ? worker_thread+0x0/0xe0
  May 31 09:55:22 tirion kernel: [ 2160.252565]  [<c01674b4>] kthread+0x74/0x80
  May 31 09:55:22 tirion kernel: [ 2160.252575]  [<c0167440>] ? kthread+0x0/0x80
  May 31 09:55:22 tirion kernel: [ 2160.252587]  [<c0104087>] kernel_thread_helper+0x7/0x10
  May 31 09:55:22 tirion kernel: [ 2160.252602] INFO: task loop1:4127 blocked for more than 120 seconds.
  May 31 09:55:22 tirion kernel: [ 2160.252609] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  May 31 09:55:22 tirion kernel: [ 2160.252617] loop1         D 004206d7     0  4127      2 0x00000000
  May 31 09:55:22 tirion kernel: [ 2160.252630]  d296bde8 00000046 f5fa0000 004206d7 00000000 c0846740 f605cf8c c0846740
  May 31 09:55:22 tirion kernel: [ 2160.252649]  94b6508d 000001d5 c0846740 c0846740 f605cf8c c0846740 c0846740 f6668a80
  May 31 09:55:22 tirion kernel: [ 2160.252669]  00000000 000001d5 f605cce0 c1c08740 f605cce0 d296be30 d296bdf8 c058998a
  May 31 09:55:22 tirion kernel: [ 2160.252688] Call Trace:
  May 31 09:55:22 tirion kernel: [ 2160.252699]  [<c058998a>] io_schedule+0x3a/0x60
  May 31 09:55:22 tirion kernel: [ 2160.252711]  [<c01c9f2d>] sync_page+0x3d/0x50
  May 31 09:55:22 tirion kernel: [ 2160.252721]  [<c058a12d>] __wait_on_bit+0x4d/0x70
  May 31 09:55:22 tirion kernel: [ 2160.252731]  [<c01c9ef0>] ? sync_page+0x0/0x50
  May 31 09:55:22 tirion kernel: [ 2160.252742]  [<c01ca151>] wait_on_page_bit+0x91/0xa0
  May 31 09:55:22 tirion kernel: [ 2160.252754]  [<c0167790>] ? wake_bit_function+0x0/0x50
  May 31 09:55:22 tirion kernel: [ 2160.252766]  [<c01ca3f1>] wait_on_page_writeback_range+0xa1/0x110
  May 31 09:55:22 tirion kernel: [ 2160.252780]  [<c01ca5f8>] filemap_write_and_wait_range+0x78/0x80
  May 31 09:55:22 tirion kernel: [ 2160.252795]  [<c022a0a2>] vfs_fsync_range+0x62/0xc0
  May 31 09:55:22 tirion kernel: [ 2160.252807]  [<c022a1b3>] vfs_fsync+0x33/0x40
  May 31 09:55:22 tirion kernel: [ 2160.252820]  [<c03f0fa1>] do_bio_filebacked+0xf1/0x160
  May 31 09:55:22 tirion kernel: [ 2160.252830]  [<c058955c>] ? schedule+0x44c/0x840
  May 31 09:55:22 tirion kernel: [ 2160.252845]  [<c012a438>] ? default_spin_lock_flags+0x8/0x10
  May 31 09:55:22 tirion kernel: [ 2160.252857]  [<c058b5ef>] ? _spin_lock_irqsave+0x2f/0x50
  May 31 09:55:22 tirion kernel: [ 2160.252868]  [<c01678af>] ? finish_wait+0x4f/0x70
  May 31 09:55:22 tirion kernel: [ 2160.252879]  [<c03f10b6>] loop_thread+0xa6/0x210
  May 31 09:55:22 tirion kernel: [ 2160.252891]  [<c0167740>] ? autoremove_wake_function+0x0/0x50
  May 31 09:55:22 tirion kernel: [ 2160.252901]  [<c03f1010>] ? loop_thread+0x0/0x210
  May 31 09:55:22 tirion kernel: [ 2160.252912]  [<c01674b4>] kthread+0x74/0x80
  May 31 09:55:22 tirion kernel: [ 2160.252922]  [<c0167440>] ? kthread+0x0/0x80
  May 31 09:55:22 tirion kernel: [ 2160.252934]  [<c0104087>] kernel_thread_helper+0x7/0x10
  May 31 09:55:22 tirion kernel: [ 2160.252944] INFO: task kdmflush:4141 blocked for more than 120 seconds.
  May 31 09:55:22 tirion kernel: [ 2160.252950] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  May 31 09:55:22 tirion kernel: [ 2160.252958] kdmflush      D 000337e4     0  4141      2 0x00000000
  May 31 09:55:22 tirion kernel: [ 2160.252971]  d29a9edc 00000046 f5f18000 000337e4 00000000 c0846740 f692e92c c0846740
  May 31 09:55:22 tirion kernel: [ 2160.252991]  9094f856 000001d5 c0846740 c0846740 f692e92c c0846740 c0846740 f63ebc40
  May 31 09:55:22 tirion kernel: [ 2160.253010]  00000000 000001d5 f692e680 c1c08740 f692e680 00000002 d29a9eec c058998a
  May 31 09:55:22 tirion kernel: [ 2160.253029] Call Trace:
  ...

  several more traces

  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: linux-image-2.6.32-22-generic 2.6.32-22.33
  Regression: Yes
  Reproducible: Yes
  ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
  Uname: Linux 2.6.32-22-generic i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  roth       2992 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'I82801DBICH4'/'Intel 82801DB-ICH4 with STAC9750,51 at irq 5'
     Mixer name	: 'SigmaTel STAC9750,51'
     Components	: 'AC97a:83847650'
     Controls      : 36
     Simple ctrls  : 23
  Date: Mon May 31 22:38:06 2010
  HibernationDevice: RESUME=/dev/sda5
  MachineType: Dell Computer Corporation Inspiron 8600
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcCmdLine: root=UUID=ec7ab08b-f34d-4d61-8a03-4f9035425956 ro quiet splash
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.utf8
   SHELL=/bin/bash
  RelatedPackageVersions: linux-firmware 1.34
  SourcePackage: linux
  WpaSupplicantLog:
   
  dmi.bios.date: 01/12/2004
  dmi.bios.vendor: Dell Computer Corporation
  dmi.bios.version: A04
  dmi.board.name: 0P3490
  dmi.board.vendor: Dell Computer Corporation
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Computer Corporation
  dmi.modalias: dmi:bvnDellComputerCorporation:bvrA04:bd01/12/2004:svnDellComputerCorporation:pnInspiron8600:pvr:rvnDellComputerCorporation:rn0P3490:rvr:cvnDellComputerCorporation:ct8:cvr:
  dmi.product.name: Inspiron 8600
  dmi.sys.vendor: Dell Computer Corporation

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