kernel-packages team mailing list archive

[Steve Langasek <steve.langasek@xxxxxxxxxxxxx>]

Seth, here's a copy of a lockup from /var/log/kern.log.  Sorry, I wanted
to attach this sooner, but the fact that the lockup takes down both the
network and the filesystem made capturing this unreliable.

Feb 20 17:52:14 virgil kernel: [93233.532498] BUG: soft lockup - CPU#1 stuck for 22s! [kworker/1:0:32266]
Feb 20 17:52:14 virgil kernel: [93233.532504] Modules linked in: hid_microsoft usbhid hid snd_usb_audio snd_usbmidi_lib ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs dm_snapshot cts des_generic nfsv3 nfsv4 ctr ccm xt_conntrack ipt_REJECT ip6table_filter ip6_tables xt_CHECKSUM iptable_mangle ipt_MASQUERADE iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack xt_tcpudp bridge stp llc iptable_filter ip_tables x_tables rfcomm bnep rpcsec_gss_krb5 binfmt_misc nfsd auth_rpcgss nfs_acl nfs lockd sunrpc fscache intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm joydev arc4 snd_hda_codec_hdmi dm_multipath iwldvm scsi_dh snd_hda_codec_realtek uvcvideo mac80211 btusb snd_hda_intel snd_hda_codec videobuf2_vmalloc bluetooth videobuf2_memops videobuf2_core videodev snd_hwdep thinkpad_acpi snd_pcm iwlwifi snd_page_alloc nvram snd_seq_midi snd_seq_midi_event snd_rawmidi microcode psmouse snd_seq cfg80211 snd_seq_device snd_timer serio_raw snd soundcore mei_me mei lpc_ich mac_hid nls_iso8859_1 lp parport btrfs(F) xor(F) raid6_pq(F) libcrc32c(F) dm_crypt(F) crct10dif_pclmul(F) crc32_pclmul(F) ghash_clmulni_intel(F) aesni_intel(F) aes_x86_64(F) lrw(F) gf128mul(F) glue_helper(F) ablk_helper(F) cryptd(F) ahci(F) libahci(F) sdhci_pci(F) sdhci(F) e1000e(F) ptp(F) pps_core(F) i915(F) i2c_algo_bit(F) drm_kms_helper(F) drm(F) wmi(F) video(F)
Feb 20 17:52:14 virgil kernel: [93233.532643] CPU: 1 PID: 32266 Comm: kworker/1:0 Tainted: GF       W    3.13.0-8-generic #28-Ubuntu
Feb 20 17:52:14 virgil kernel: [93233.532646] Hardware name: LENOVO 2306CTO/2306CTO, BIOS G2ET97WW (2.57 ) 10/25/2013
Feb 20 17:52:14 virgil kernel: [93233.532669] Workqueue: rpciod rpc_async_schedule [sunrpc]
Feb 20 17:52:14 virgil kernel: [93233.532673] task: ffff88017b573000 ti: ffff8801d106e000 task.ti: ffff8801d106e000
Feb 20 17:52:14 virgil kernel: [93233.532675] RIP: 0010:[<ffffffffa07a5c7f>]  [<ffffffffa07a5c7f>] call_refreshresult+0x4f/0x150 [sunrpc]
Feb 20 17:52:14 virgil kernel: [93233.532690] RSP: 0018:ffff8801d106fda0  EFLAGS: 00000246
Feb 20 17:52:14 virgil kernel: [93233.532692] RAX: 0000000000000005 RBX: 0000000000000003 RCX: ffff88020f6d6198
Feb 20 17:52:14 virgil kernel: [93233.532695] RDX: 0000000000000001 RSI: ffff88006a3c7e40 RDI: ffff88009f164a00
Feb 20 17:52:14 virgil kernel: [93233.532697] RBP: ffff8801d106fdb0 R08: 0000000000000003 R09: 0000000000000003
Feb 20 17:52:14 virgil kernel: [93233.532700] R10: ffff88020f6d61c0 R11: ffffffffa07aa8a3 R12: ffff88020f6d61c0
Feb 20 17:52:14 virgil kernel: [93233.532702] R13: ffffffffa07aa8a3 R14: ffff88020f6d6198 R15: ffff8801d106fd98
Feb 20 17:52:14 virgil kernel: [93233.532705] FS:  0000000000000000(0000) GS:ffff88021e240000(0000) knlGS:0000000000000000
Feb 20 17:52:14 virgil kernel: [93233.532708] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Feb 20 17:52:14 virgil kernel: [93233.532710] CR2: 00007f682cd48b24 CR3: 0000000002c0e000 CR4: 00000000001407e0
Feb 20 17:52:14 virgil kernel: [93233.532713] Stack:
Feb 20 17:52:14 virgil kernel: [93233.532715]  ffff88009f164a00 ffff880211f59800 ffff8801d106fe08 ffffffffa07b0d64
Feb 20 17:52:14 virgil kernel: [93233.532721]  0000000000014440 ffff88009f164a70 ffffffff81094538 0000000000000000
Feb 20 17:52:14 virgil kernel: [93233.532726]  ffff88017b573000 ffff88021e253cc0 ffff88009f164a88 0000000000000000
Feb 20 17:52:14 virgil kernel: [93233.532731] Call Trace:
Feb 20 17:52:14 virgil kernel: [93233.532751]  [<ffffffffa07b0d64>] __rpc_execute+0x84/0x410 [sunrpc]
Feb 20 17:52:14 virgil kernel: [93233.532759]  [<ffffffff81094538>] ? finish_task_switch+0x128/0x170
Feb 20 17:52:14 virgil kernel: [93233.532775]  [<ffffffffa07b1116>] rpc_async_schedule+0x26/0x30 [sunrpc]
Feb 20 17:52:14 virgil kernel: [93233.532783]  [<ffffffff81080702>] process_one_work+0x182/0x450
Feb 20 17:52:14 virgil kernel: [93233.532788]  [<ffffffff810814a1>] worker_thread+0x121/0x410
Feb 20 17:52:14 virgil kernel: [93233.532793]  [<ffffffff81081380>] ? rescuer_thread+0x3e0/0x3e0
Feb 20 17:52:14 virgil kernel: [93233.532798]  [<ffffffff810880f2>] kthread+0xd2/0xf0
Feb 20 17:52:14 virgil kernel: [93233.532803]  [<ffffffff81088020>] ? kthread_create_on_node+0x190/0x190
Feb 20 17:52:14 virgil kernel: [93233.532811]  [<ffffffff8171a4fc>] ret_from_fork+0x7c/0xb0
Feb 20 17:52:14 virgil kernel: [93233.532816]  [<ffffffff81088020>] ? kthread_create_on_node+0x190/0x190
Feb 20 17:52:14 virgil kernel: [93233.532818] Code: 83 fc 92 c7 83 cc 00 00 00 00 00 00 00 48 c7 43 50 c0 5b 7a a0 0f 84 91 00 00 00 7e 67 41 83 fc f5 74 21 45 85 e4 75 62 48 89 df <e8> ec d8 00 00 85 c0 74 48 48 c7 43 50 b0 58 7a a0 5b 41 5c 5d

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https://bugs.launchpad.net/bugs/1282302

Title:
  deadlock when unmounting nfs shares in trusty

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  In trusty, I frequently find that unmounting NFS shares (which I do on
  my laptop before roaming) frequently causes a "soft lockup" in the
  kernel that leaves me needing to hard reboot the system, because both
  network access and disk access start failing and the unmount itself
  never returns.

  The problem is not reproducible if I unmount the shares immediately
  after a reboot; I don't know why.  It could be related to the fact
  that some of these NFS shares are bind-mounted into chroots, but the
  problem is reproducible even when no bind mounts are active.

  This is a serious regression from previous kernels, which I think
  should be a priority for resolving in an LTS release.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-generic 3.13.0.8.12
  ProcVersionSignature: Ubuntu 3.13.0-8.28-generic 3.13.2
  Uname: Linux 3.13.0-8-generic x86_64
  ApportVersion: 2.13.2-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  vorlon     4161 F.... pulseaudio
   /dev/snd/controlC0:  vorlon     4161 F.... pulseaudio
   /dev/snd/pcmC0D0p:   vorlon     4161 F...m pulseaudio
  CurrentDesktop: Unity
  Date: Wed Feb 19 14:38:51 2014
  HibernationDevice: RESUME=UUID=6df76279-19ea-45a4-bec9-e4fdc858729a
  InstallationDate: Installed on 2010-09-24 (1244 days ago)
  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
  MachineType: LENOVO 2306CTO
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-8-generic root=UUID=362a1cf5-63b7-4122-8457-33ca1d10a8ad ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-8-generic N/A
   linux-backports-modules-3.13.0-8-generic  N/A
   linux-firmware                            1.124
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2013-10-23 (119 days ago)
  WifiSyslog:
   
  dmi.bios.date: 10/25/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G2ET97WW (2.57 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2306CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrG2ET97WW(2.57):bd10/25/2013:svnLENOVO:pn2306CTO:pvrThinkPadX230:rvnLENOVO:rn2306CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2306CTO
  dmi.product.version: ThinkPad X230
  dmi.sys.vendor: LENOVO

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