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[Launchpad Bug Tracker <1060425@xxxxxxxxxxxxxxxxxx>]

[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/1060425

Title:
  [Super Micro X8DTT] NFS raw_spin_lock hung task

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  I've been flooded with NFS spin locks, with following mount options:
  192.168.200.1:/mnt/storage      /home   nfs     defaults,intr,rsize=4096,wsize=4096,noatime,nodiratime,actimeo=5      0       0

  without attribute caching the system is unusable so I can't provide
  whether it happens with noac.

  [644748.895239] Call Trace:
  [644748.895253]  [<ffffffff8165a4fe>] ? _raw_spin_lock+0xe/0x20
  [644748.895267]  [<ffffffff816585ef>] schedule+0x3f/0x60
  [644748.895278]  [<ffffffff816593f7>] __mutex_lock_slowpath+0xd7/0x150
  [644748.895290]  [<ffffffff8165900a>] mutex_lock+0x2a/0x50
  [644748.895303]  [<ffffffff81184c76>] do_lookup+0x1d6/0x310
  [644748.895316]  [<ffffffff8116333c>] ? kmem_cache_alloc_trace+0x10c/0x140
  [644748.895327]  [<ffffffff81185dc0>] do_last+0xe0/0x730
  [644748.895339]  [<ffffffff811877b1>] path_openat+0xd1/0x3f0
  [644748.895350]  [<ffffffff811830f5>] ? putname+0x35/0x50
  [644748.895360]  [<ffffffff81187b53>] ? user_path_at_empty+0x63/0xa0
  [644748.895386]  [<ffffffffa02747db>] ? nfs_attribute_cache_expired+0x1b/0x70 [nfs]
  [644748.895398]  [<ffffffff81187bf2>] do_filp_open+0x42/0xa0
  [644748.895411]  [<ffffffff81319321>] ? strncpy_from_user+0x31/0x40
  [644748.895422]  [<ffffffff81182f3a>] ? do_getname+0x10a/0x180
  [644748.895434]  [<ffffffff8165a4fe>] ? _raw_spin_lock+0xe/0x20
  [644748.895447]  [<ffffffff81194eb7>] ? alloc_fd+0xf7/0x150
  [644748.895459]  [<ffffffff8117722d>] do_sys_open+0xed/0x220
  [644748.895469]  [<ffffffff81177380>] sys_open+0x20/0x30
  [644748.895480]  [<ffffffff81662b02>] system_call_fastpath+0x16/0x1b

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-31-generic 3.2.0-31.50
  ProcVersionSignature: Ubuntu 3.2.0-31.50-generic 3.2.28
  Uname: Linux 3.2.0-31-generic x86_64
  AlsaDevices:
   total 0
   crw-rw---T 1 root audio 116,  1 Sep 25 10:15 seq
   crw-rw---T 1 root audio 116, 33 Sep 25 10:15 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.0.1-0ubuntu13
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Date: Tue Oct  2 21:57:30 2012
  HibernationDevice: RESUME=UUID=e7aefc01-9dc5-49ca-be7a-cdbc74dee48e
  InstallationMedia: Ubuntu-Server 10.04.3 LTS "Lucid Lynx" - Release amd64 (20110719.2)
  IwConfig:
   lo        no wireless extensions.
   
   eth1      no wireless extensions.
   
   eth0      no wireless extensions.
  MachineType: Supermicro X8DTT
  PciMultimedia:
   
  ProcEnviron:
   TERM=xterm
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-31-generic root=/dev/mapper/hostname-root ro quiet
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-31-generic N/A
   linux-backports-modules-3.2.0-31-generic  N/A
   linux-firmware                            1.79.1
  RfKill: Error: [Errno 2] No such file or directory
  SourcePackage: linux
  UpgradeStatus: Upgraded to precise on 2012-09-24 (8 days ago)
  dmi.bios.date: 02/11/2011
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 080016
  dmi.board.asset.tag: 1234567890
  dmi.board.name: X8DTT
  dmi.board.vendor: Supermicro
  dmi.board.version: 2.0
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 17
  dmi.chassis.vendor: Supermicro
  dmi.chassis.version: 1234567890
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr080016:bd02/11/2011:svnSupermicro:pnX8DTT:pvr1234567890:rvnSupermicro:rnX8DTT:rvr2.0:cvnSupermicro:ct17:cvr1234567890:
  dmi.product.name: X8DTT
  dmi.product.version: 1234567890
  dmi.sys.vendor: Supermicro

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