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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

*** This bug is a duplicate of bug 1384711 ***
    https://bugs.launchpad.net/bugs/1384711

** This bug is no longer a duplicate of bug 1235521
   btrfs general protection fault

** This bug has been marked a duplicate of bug 1384711
   btrfs oops on current 3.13

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https://bugs.launchpad.net/bugs/1237833

Title:
  Process freezes during IO on btrfs

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  On a quite clean installation, I'm using btrfs with compression turned
  on.

  during a build, it seemed the build process stopped.

  dmesg showed

  [  221.080504] warning: `VirtualBox' uses 32-bit capabilities (legacy support in use)
  [12161.785213] general protection fault: 0000 [#1] SMP 
  [12161.785241] Modules linked in: pci_stub vboxpci(OF) vboxnetadp(OF) vboxnetflt(OF) vboxdrv(OF) snd_usb_audio snd_usbmidi_lib usb_storage(F) parport_pc(F) ppdev(F) bnep rfcomm bluetooth binfmt_misc(F) hid_generic usbhid x86_pkg_temp_thermal intel_powerclamp hid coretemp kvm_intel(F) kvm(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) snd_hda_codec_hdmi dcdbas snd_hda_codec_realtek snd_hda_intel microcode(F) snd_hda_codec snd_hwdep(F) nls_iso8859_1(F) serio_raw(F) snd_pcm(F) snd_page_alloc(F) snd_seq_midi(F) snd_seq_midi_event(F) lpc_ich snd_rawmidi(F) snd_seq(F) snd_seq_device(F) snd_timer(F) tpm_tis snd(F) mac_hid mei_me soundcore(F) mei ext2(F) lp(F) parport(F) btrfs(F) xor(F) zlib_deflate(F) raid6_pq(F) libcrc32c(F) radeon i2c_algo_bit ttm drm_kms_helper drm ahci(F) libahci(F) e1000e(F) ptp(F) pps_core(F) video(F)
  [12161.785496] CPU: 2 PID: 22490 Comm: java Tainted: GF          O 3.11.0-11-generic #17-Ubuntu
  [12161.785516] Hardware name: Dell Inc. OptiPlex 7010/0GY6Y8, BIOS A15 08/12/2013
  [12161.785534] task: ffff880402141770 ti: ffff88003f9b6000 task.ti: ffff88003f9b6000
  [12161.785551] RIP: 0010:[<ffffffff813690a6>]  [<ffffffff813690a6>] memcpy+0x6/0x110
  [12161.785572] RSP: 0018:ffff88003f9b7968  EFLAGS: 00010207
  [12161.785585] RAX: ffff880255fad021 RBX: 000000000000000a RCX: 000000000000000a
  [12161.785601] RDX: 000000000000000a RSI: 0005080000000000 RDI: ffff880255fad021
  [12161.785617] RBP: ffff88003f9b79a0 R08: 0000000000001000 R09: ffff880255fad000
  [12161.785633] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8802a47a19d0
  [12161.785649] R13: 0000160000000000 R14: ffff880255fad02b R15: 000000000000000a
  [12161.785666] FS:  00002b88695a9700(0000) GS:ffff88041dc80000(0000) knlGS:0000000000000000
  [12161.785685] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [12161.785698] CR2: 0000000703266000 CR3: 000000015d79b000 CR4: 00000000001427e0
  [12161.785715] Stack:
  [12161.785720]  ffffffffa02b9d4c 0000000000001000 ffff880401db0800 0000000000000000
  [12161.785739]  ffff88040147c000 ffff880286faed20 ffff8802d96b2980 ffff88003f9b7a60
  [12161.785758]  ffffffffa029e3b6 0000000000000000 0000000000000f65 00000000ffffffff
  [12161.785781] Call Trace:
  [12161.785811]  [<ffffffffa02b9d4c>] ? read_extent_buffer+0xbc/0x110 [btrfs]
  [12161.785837]  [<ffffffffa029e3b6>] btrfs_get_extent+0x906/0x9b0 [btrfs]
  [12161.785859]  [<ffffffffa02b704e>] __extent_read_full_page+0x2ee/0x710 [btrfs]
  [12161.785877]  [<ffffffff8119c79a>] ? __mem_cgroup_commit_charge+0x9a/0x380
  [12161.785899]  [<ffffffffa029dab0>] ? btrfs_real_readdir+0x5c0/0x5c0 [btrfs]
  [12161.785926]  [<ffffffff8115b873>] ? __inc_zone_page_state+0x33/0x40
  [12161.785951]  [<ffffffffa029dab0>] ? btrfs_real_readdir+0x5c0/0x5c0 [btrfs]
  [12161.785973]  [<ffffffffa02b8465>] extent_readpages+0x1a5/0x210 [btrfs]
  [12161.785990]  [<ffffffff81183969>] ? alloc_pages_current+0xa9/0x160
  [12161.786010]  [<ffffffffa029ba5f>] btrfs_readpages+0x1f/0x30 [btrfs]
  [12161.786026]  [<ffffffff8114a888>] __do_page_cache_readahead+0x1a8/0x240
  [12161.786043]  [<ffffffff8114ad96>] ondemand_readahead+0x126/0x250
  [12161.786058]  [<ffffffff81316e33>] ? apparmor_file_alloc_security+0x23/0x40
  [12161.786075]  [<ffffffff8114aef3>] page_cache_sync_readahead+0x33/0x50
  [12161.786090]  [<ffffffff811406a5>] generic_file_aio_read+0x4b5/0x700
  [12161.786106]  [<ffffffff811a64e0>] do_sync_read+0x80/0xb0
  [12161.786119]  [<ffffffff811a6b3e>] vfs_read+0x9e/0x170
  [12161.786131]  [<ffffffff811a7669>] SyS_read+0x49/0xa0
  [12161.786145]  [<ffffffff817029dd>] system_call_fastpath+0x1a/0x1f
  [12161.786159] Code: 43 58 48 2b 43 50 88 43 4e 5b 5d c3 66 0f 1f 84 00 00 00 00 00 e8 fb fb ff ff eb e2 90 90 90 90 90 90 90 90 90 48 89 f8 48 89 d1 <f3> a4 c3 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 20 4c 8b 06 4c 8b 
  [12161.786238] RIP  [<ffffffff813690a6>] memcpy+0x6/0x110
  [12161.786253]  RSP <ffff88003f9b7968>
  [12161.793297] ---[ end trace ba94e36a29af0444 ]---

  
  any hints? should i turn compression off?

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: linux-image (not installed)
  ProcVersionSignature: Ubuntu 3.11.0-11.17-generic 3.11.3
  Uname: Linux 3.11.0-11-generic x86_64
  ApportVersion: 2.12.5-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  juergen    2279 F.... pulseaudio
   /dev/snd/controlC1:  juergen    2279 F.... pulseaudio
   /dev/snd/controlC0:  juergen    2279 F.... pulseaudio
   /dev/snd/pcmC0D0p:   juergen    2279 F...m pulseaudio
  Date: Thu Oct 10 10:30:14 2013
  HibernationDevice: RESUME=UUID=d9c05c0f-8e3c-4690-9f47-9ac8625758ff
  InstallationDate: Installed on 2013-10-04 (5 days ago)
  InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Beta amd64 (20131003)
  IwConfig:
   vboxnet0  no wireless extensions.
   
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: Dell Inc. OptiPlex 7010
  MarkForUpload: True
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.11.0-11-generic.efi.signed root=UUID=8e6dea65-9ed5-49b1-b46a-04de969952b1 ro rootflags=subvol=@ quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-11-generic N/A
   linux-backports-modules-3.11.0-11-generic  N/A
   linux-firmware                             1.116
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/12/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A15
  dmi.board.name: 0GY6Y8
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A01
  dmi.chassis.type: 6
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA15:bd08/12/2013:svnDellInc.:pnOptiPlex7010:pvr01:rvnDellInc.:rn0GY6Y8:rvrA01:cvnDellInc.:ct6:cvr:
  dmi.product.name: OptiPlex 7010
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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