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[Bug 1235798] Re: Kernel stops during btrfs-balance

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apport information

** Description changed:

  [  208.335732] ------------[ cut here ]------------
  [  208.336386] Kernel BUG at ffffffffa014a167 [verbose debug info unavailable]
  [  208.337249] invalid opcode: 0000 [#1] SMP 
  [  208.337758] Modules linked in: dm_crypt(F) kvm_intel(F) kvm(F) aesni_intel(F) aes_x86_64(F) lrw(F) gf128mul(F) glue_helper(F) ablk_helper(F) cryptd(F) microcode(F) psmouse(F) serio_raw(F) virtio_balloon(F) i2c_piix4 mac_hid lp(F) parport(F) btrfs(F) xor(F) zlib_deflate(F) raid6_pq(F) libcrc32c(F) cirrus syscopyarea(F) sysfillrect(F) sysimgblt(F) ttm drm_kms_helper drm floppy(F)
  [  208.339602] CPU: 0 PID: 630 Comm: btrfs-balance Tainted: GF            3.11.0-11-generic #17-Ubuntu
  [  208.339602] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007
  [  208.339602] task: ffff8800b47c9770 ti: ffff8800b3088000 task.ti: ffff8800b3088000
  [  208.339602] RIP: 0010:[<ffffffffa014a167>]  [<ffffffffa014a167>] build_backref_tree+0x277/0x11d0 [btrfs]
  [  208.339602] RSP: 0018:ffff8800b3089a90  EFLAGS: 00010246
  [  208.339602] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8800365ffb50
  [  208.339602] RDX: ffff8800b3089b00 RSI: ffff8800b3089b00 RDI: ffff8800365ffb40
  [  208.339602] RBP: ffff8800b3089b70 R08: ffff8800b410ec00 R09: ffff8800b410eb00
  [  208.339602] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8800365ffb50
  [  208.339602] R13: ffff8800b611e2d0 R14: ffff88003616c000 R15: ffff8800b410ee00
  [  208.339602] FS:  0000000000000000(0000) GS:ffff8800bb200000(0000) knlGS:0000000000000000
  [  208.339602] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
  [  208.339602] CR2: 00007fda19930d50 CR3: 00000000b3f5e000 CR4: 00000000000006f0
  [  208.339602] Stack:
  [  208.339602]  ffff88003616c588 ffff8800b410eb00 ffff8800365ffce0 ffff8800b410ec00
  [  208.339602]  ffff8800b410ec00 ffff8800b358b800 ffff8800b611e2d0 ffff8800b410ec40
  [  208.339602]  ffff8800b611e090 ffff88003616c120 ffff8800b410eb00 ffff88003616c020
  [  208.339602] Call Trace:
  [  208.339602]  [<ffffffffa014b478>] relocate_tree_blocks+0x1d8/0x630 [btrfs]
  [  208.339602]  [<ffffffffa014c108>] ? add_data_references+0x248/0x280 [btrfs]
  [  208.339602]  [<ffffffffa014cd00>] relocate_block_group+0x280/0x690 [btrfs]
  [  208.339602]  [<ffffffffa014d2af>] btrfs_relocate_block_group+0x19f/0x2e0 [btrfs]
  [  208.339602]  [<ffffffffa012477f>] btrfs_relocate_chunk.isra.30+0x6f/0x730 [btrfs]
  [  208.339602]  [<ffffffffa00dab89>] ? btrfs_set_path_blocking+0x39/0x80 [btrfs]
  [  208.339602]  [<ffffffffa00df940>] ? btrfs_search_slot+0x380/0x940 [btrfs]
  [  208.339602]  [<ffffffffa011b289>] ? release_extent_buffer+0x69/0xd0 [btrfs]
  [  208.339602]  [<ffffffffa0120c8f>] ? free_extent_buffer+0x4f/0xa0 [btrfs]
  [  208.339602]  [<ffffffffa0128ecd>] __btrfs_balance+0x43d/0x800 [btrfs]
  [  208.339602]  [<ffffffffa012964b>] btrfs_balance+0x3bb/0x670 [btrfs]
  [  208.339602]  [<ffffffffa0129970>] balance_kthread+0x70/0x80 [btrfs]
  [  208.339602]  [<ffffffffa0129900>] ? btrfs_balance+0x670/0x670 [btrfs]
  [  208.339602]  [<ffffffff810847b0>] kthread+0xc0/0xd0
  [  208.339602]  [<ffffffff810846f0>] ? kthread_create_on_node+0x120/0x120
  [  208.339602]  [<ffffffff8170292c>] ret_from_fork+0x7c/0xb0
  [  208.339602]  [<ffffffff810846f0>] ? kthread_create_on_node+0x120/0x120
  [  208.339602] Code: f6 43 71 10 0f 85 18 0f 00 00 48 8d 43 40 48 89 c6 48 89 85 58 ff ff ff 48 8b 43 40 48 39 c6 74 0c 48 3b 43 48 0f 84 f5 08 00 00 <0f> 0b 48 c7 85 78 ff ff ff 00 00 00 00 0f 1f 40 00 e8 43 df 5a 
  [  208.339602] RIP  [<ffffffffa014a167>] build_backref_tree+0x277/0x11d0 [btrfs]
  [  208.339602]  RSP <ffff8800b3089a90>
  [  208.377485] ---[ end trace 7f1cd354cc35fbd9 ]---
  --- 
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Oct  6 15:18 seq
   crw-rw---- 1 root audio 116, 33 Oct  6 15:18 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.12.5-0ubuntu1
  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:
  DistroRelease: Ubuntu 13.10
  HibernationDevice: RESUME=UUID=2447d766-b078-4ed0-87f3-c27412c10649
  InstallationDate: Installed on 2011-02-03 (977 days ago)
  InstallationMedia: Ubuntu-Server 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: Bochs Bochs
  MarkForUpload: True
  Package: linux (not installed)
  PciMultimedia:
   
  ProcEnviron:
   LC_CTYPE=UTF-8
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   SHELL=/bin/bash
  ProcFB: 0 cirrusdrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-11-generic root=UUID=0dbf4328-2e66-42b3-88dd-b96a5c25b11d ro console=tty0 console=ttyS0,115200n8 quiet
  ProcVersionSignature: Ubuntu 3.11.0-11.17-generic 3.11.3
  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: Error: [Errno 2] No such file or directory
  Tags:  saucy
  Uname: Linux 3.11.0-11-generic x86_64
  UpgradeStatus: Upgraded to saucy on 2013-08-25 (43 days ago)
  UserGroups:
   
  dmi.bios.date: 01/01/2007
  dmi.bios.vendor: Bochs
  dmi.bios.version: Bochs
  dmi.chassis.type: 1
  dmi.chassis.vendor: Bochs
  dmi.modalias: dmi:bvnBochs:bvrBochs:bd01/01/2007:svnBochs:pnBochs:pvr:cvnBochs:ct1:cvr:
  dmi.product.name: Bochs
  dmi.sys.vendor: Bochs
  --- 
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Oct 27 01:22 seq
   crw-rw---- 1 root audio 116, 33 Oct 27 01:22 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.12.5-0ubuntu2.1
  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:
  DistroRelease: Ubuntu 13.10
  HibernationDevice: RESUME=UUID=2447d766-b078-4ed0-87f3-c27412c10649
  InstallationDate: Installed on 2011-02-03 (1003 days ago)
  InstallationMedia: Ubuntu-Server 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: Bochs Bochs
  MarkForUpload: True
  Package: linux (not installed)
  PciMultimedia:
   
  ProcFB: 0 cirrusdrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic root=UUID=0dbf4328-2e66-42b3-88dd-b96a5c25b11d ro console=tty0 console=ttyS0,115200n8 quiet
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-12-generic N/A
   linux-backports-modules-3.11.0-12-generic  N/A
   linux-firmware                             1.116
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  saucy
  Uname: Linux 3.11.0-12-generic x86_64
  UpgradeStatus: Upgraded to saucy on 2013-08-25 (69 days ago)
  UserGroups:
   
  WifiSyslog:
   Nov  3 11:43:14 ubuntunas kernel: [645622.149145] SGI XFS with ACLs, security attributes, realtime, large block/inode numbers, no debug enabled
   Nov  3 11:43:14 ubuntunas kernel: [645622.195799] JFS: nTxBlock = 8192, nTxLock = 65536
   Nov  3 11:43:14 ubuntunas kernel: [645622.252611] NTFS driver 2.1.30 [Flags: R/O MODULE].
   Nov  3 11:43:14 ubuntunas kernel: [645622.362604] QNX4 filesystem 0.2.3 registered.
  dmi.bios.date: 01/01/2007
  dmi.bios.vendor: Bochs
  dmi.bios.version: Bochs
  dmi.chassis.type: 1
  dmi.chassis.vendor: Bochs
  dmi.modalias: dmi:bvnBochs:bvrBochs:bd01/01/2007:svnBochs:pnBochs:pvr:cvnBochs:ct1:cvr:
  dmi.product.name: Bochs
  dmi.sys.vendor: Bochs
+ --- 
+ AlsaDevices:
+  total 0
+  crw-rw---- 1 root audio 116,  1 Oct 27 01:22 seq
+  crw-rw---- 1 root audio 116, 33 Oct 27 01:22 timer
+ AplayDevices: Error: [Errno 2] No such file or directory
+ ApportVersion: 2.12.5-0ubuntu2.1
+ 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:
+ DistroRelease: Ubuntu 13.10
+ HibernationDevice: RESUME=UUID=2447d766-b078-4ed0-87f3-c27412c10649
+ InstallationDate: Installed on 2011-02-03 (1003 days ago)
+ InstallationMedia: Ubuntu-Server 10.10 "Maverick Meerkat" - Release amd64 (20101007)
+ IwConfig:
+  eth0      no wireless extensions.
+  
+  lo        no wireless extensions.
+ Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
+ MachineType: Bochs Bochs
+ MarkForUpload: True
+ Package: linux (not installed)
+ PciMultimedia:
+  
+ ProcEnviron:
+  TERM=linux
+  PATH=(custom, no user)
+  XDG_RUNTIME_DIR=<set>
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
+ ProcFB: 0 cirrusdrmfb
+ ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic root=UUID=0dbf4328-2e66-42b3-88dd-b96a5c25b11d ro console=tty0 console=ttyS0,115200n8 quiet
+ ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
+ RelatedPackageVersions:
+  linux-restricted-modules-3.11.0-12-generic N/A
+  linux-backports-modules-3.11.0-12-generic  N/A
+  linux-firmware                             1.116
+ RfKill: Error: [Errno 2] No such file or directory
+ Tags:  saucy
+ Uname: Linux 3.11.0-12-generic x86_64
+ UpgradeStatus: Upgraded to saucy on 2013-08-25 (69 days ago)
+ UserGroups:
+  
+ dmi.bios.date: 01/01/2007
+ dmi.bios.vendor: Bochs
+ dmi.bios.version: Bochs
+ dmi.chassis.type: 1
+ dmi.chassis.vendor: Bochs
+ dmi.modalias: dmi:bvnBochs:bvrBochs:bd01/01/2007:svnBochs:pnBochs:pvr:cvnBochs:ct1:cvr:
+ dmi.product.name: Bochs
+ dmi.sys.vendor: Bochs

** Attachment added: "BootDmesg.txt"
   https://bugs.launchpad.net/bugs/1235798/+attachment/3899183/+files/BootDmesg.txt

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https://bugs.launchpad.net/bugs/1235798

Title:
  Kernel stops during btrfs-balance

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  [  208.335732] ------------[ cut here ]------------
  [  208.336386] Kernel BUG at ffffffffa014a167 [verbose debug info unavailable]
  [  208.337249] invalid opcode: 0000 [#1] SMP 
  [  208.337758] Modules linked in: dm_crypt(F) kvm_intel(F) kvm(F) aesni_intel(F) aes_x86_64(F) lrw(F) gf128mul(F) glue_helper(F) ablk_helper(F) cryptd(F) microcode(F) psmouse(F) serio_raw(F) virtio_balloon(F) i2c_piix4 mac_hid lp(F) parport(F) btrfs(F) xor(F) zlib_deflate(F) raid6_pq(F) libcrc32c(F) cirrus syscopyarea(F) sysfillrect(F) sysimgblt(F) ttm drm_kms_helper drm floppy(F)
  [  208.339602] CPU: 0 PID: 630 Comm: btrfs-balance Tainted: GF            3.11.0-11-generic #17-Ubuntu
  [  208.339602] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007
  [  208.339602] task: ffff8800b47c9770 ti: ffff8800b3088000 task.ti: ffff8800b3088000
  [  208.339602] RIP: 0010:[<ffffffffa014a167>]  [<ffffffffa014a167>] build_backref_tree+0x277/0x11d0 [btrfs]
  [  208.339602] RSP: 0018:ffff8800b3089a90  EFLAGS: 00010246
  [  208.339602] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8800365ffb50
  [  208.339602] RDX: ffff8800b3089b00 RSI: ffff8800b3089b00 RDI: ffff8800365ffb40
  [  208.339602] RBP: ffff8800b3089b70 R08: ffff8800b410ec00 R09: ffff8800b410eb00
  [  208.339602] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8800365ffb50
  [  208.339602] R13: ffff8800b611e2d0 R14: ffff88003616c000 R15: ffff8800b410ee00
  [  208.339602] FS:  0000000000000000(0000) GS:ffff8800bb200000(0000) knlGS:0000000000000000
  [  208.339602] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
  [  208.339602] CR2: 00007fda19930d50 CR3: 00000000b3f5e000 CR4: 00000000000006f0
  [  208.339602] Stack:
  [  208.339602]  ffff88003616c588 ffff8800b410eb00 ffff8800365ffce0 ffff8800b410ec00
  [  208.339602]  ffff8800b410ec00 ffff8800b358b800 ffff8800b611e2d0 ffff8800b410ec40
  [  208.339602]  ffff8800b611e090 ffff88003616c120 ffff8800b410eb00 ffff88003616c020
  [  208.339602] Call Trace:
  [  208.339602]  [<ffffffffa014b478>] relocate_tree_blocks+0x1d8/0x630 [btrfs]
  [  208.339602]  [<ffffffffa014c108>] ? add_data_references+0x248/0x280 [btrfs]
  [  208.339602]  [<ffffffffa014cd00>] relocate_block_group+0x280/0x690 [btrfs]
  [  208.339602]  [<ffffffffa014d2af>] btrfs_relocate_block_group+0x19f/0x2e0 [btrfs]
  [  208.339602]  [<ffffffffa012477f>] btrfs_relocate_chunk.isra.30+0x6f/0x730 [btrfs]
  [  208.339602]  [<ffffffffa00dab89>] ? btrfs_set_path_blocking+0x39/0x80 [btrfs]
  [  208.339602]  [<ffffffffa00df940>] ? btrfs_search_slot+0x380/0x940 [btrfs]
  [  208.339602]  [<ffffffffa011b289>] ? release_extent_buffer+0x69/0xd0 [btrfs]
  [  208.339602]  [<ffffffffa0120c8f>] ? free_extent_buffer+0x4f/0xa0 [btrfs]
  [  208.339602]  [<ffffffffa0128ecd>] __btrfs_balance+0x43d/0x800 [btrfs]
  [  208.339602]  [<ffffffffa012964b>] btrfs_balance+0x3bb/0x670 [btrfs]
  [  208.339602]  [<ffffffffa0129970>] balance_kthread+0x70/0x80 [btrfs]
  [  208.339602]  [<ffffffffa0129900>] ? btrfs_balance+0x670/0x670 [btrfs]
  [  208.339602]  [<ffffffff810847b0>] kthread+0xc0/0xd0
  [  208.339602]  [<ffffffff810846f0>] ? kthread_create_on_node+0x120/0x120
  [  208.339602]  [<ffffffff8170292c>] ret_from_fork+0x7c/0xb0
  [  208.339602]  [<ffffffff810846f0>] ? kthread_create_on_node+0x120/0x120
  [  208.339602] Code: f6 43 71 10 0f 85 18 0f 00 00 48 8d 43 40 48 89 c6 48 89 85 58 ff ff ff 48 8b 43 40 48 39 c6 74 0c 48 3b 43 48 0f 84 f5 08 00 00 <0f> 0b 48 c7 85 78 ff ff ff 00 00 00 00 0f 1f 40 00 e8 43 df 5a 
  [  208.339602] RIP  [<ffffffffa014a167>] build_backref_tree+0x277/0x11d0 [btrfs]
  [  208.339602]  RSP <ffff8800b3089a90>
  [  208.377485] ---[ end trace 7f1cd354cc35fbd9 ]---
  --- 
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Oct  6 15:18 seq
   crw-rw---- 1 root audio 116, 33 Oct  6 15:18 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.12.5-0ubuntu1
  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:
  DistroRelease: Ubuntu 13.10
  HibernationDevice: RESUME=UUID=2447d766-b078-4ed0-87f3-c27412c10649
  InstallationDate: Installed on 2011-02-03 (977 days ago)
  InstallationMedia: Ubuntu-Server 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: Bochs Bochs
  MarkForUpload: True
  Package: linux (not installed)
  PciMultimedia:
   
  ProcEnviron:
   LC_CTYPE=UTF-8
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   SHELL=/bin/bash
  ProcFB: 0 cirrusdrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-11-generic root=UUID=0dbf4328-2e66-42b3-88dd-b96a5c25b11d ro console=tty0 console=ttyS0,115200n8 quiet
  ProcVersionSignature: Ubuntu 3.11.0-11.17-generic 3.11.3
  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: Error: [Errno 2] No such file or directory
  Tags:  saucy
  Uname: Linux 3.11.0-11-generic x86_64
  UpgradeStatus: Upgraded to saucy on 2013-08-25 (43 days ago)
  UserGroups:
   
  dmi.bios.date: 01/01/2007
  dmi.bios.vendor: Bochs
  dmi.bios.version: Bochs
  dmi.chassis.type: 1
  dmi.chassis.vendor: Bochs
  dmi.modalias: dmi:bvnBochs:bvrBochs:bd01/01/2007:svnBochs:pnBochs:pvr:cvnBochs:ct1:cvr:
  dmi.product.name: Bochs
  dmi.sys.vendor: Bochs
  --- 
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Oct 27 01:22 seq
   crw-rw---- 1 root audio 116, 33 Oct 27 01:22 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.12.5-0ubuntu2.1
  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:
  DistroRelease: Ubuntu 13.10
  HibernationDevice: RESUME=UUID=2447d766-b078-4ed0-87f3-c27412c10649
  InstallationDate: Installed on 2011-02-03 (1003 days ago)
  InstallationMedia: Ubuntu-Server 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: Bochs Bochs
  MarkForUpload: True
  Package: linux (not installed)
  PciMultimedia:
   
  ProcFB: 0 cirrusdrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic root=UUID=0dbf4328-2e66-42b3-88dd-b96a5c25b11d ro console=tty0 console=ttyS0,115200n8 quiet
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-12-generic N/A
   linux-backports-modules-3.11.0-12-generic  N/A
   linux-firmware                             1.116
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  saucy
  Uname: Linux 3.11.0-12-generic x86_64
  UpgradeStatus: Upgraded to saucy on 2013-08-25 (69 days ago)
  UserGroups:
   
  WifiSyslog:
   Nov  3 11:43:14 ubuntunas kernel: [645622.149145] SGI XFS with ACLs, security attributes, realtime, large block/inode numbers, no debug enabled
   Nov  3 11:43:14 ubuntunas kernel: [645622.195799] JFS: nTxBlock = 8192, nTxLock = 65536
   Nov  3 11:43:14 ubuntunas kernel: [645622.252611] NTFS driver 2.1.30 [Flags: R/O MODULE].
   Nov  3 11:43:14 ubuntunas kernel: [645622.362604] QNX4 filesystem 0.2.3 registered.
  dmi.bios.date: 01/01/2007
  dmi.bios.vendor: Bochs
  dmi.bios.version: Bochs
  dmi.chassis.type: 1
  dmi.chassis.vendor: Bochs
  dmi.modalias: dmi:bvnBochs:bvrBochs:bd01/01/2007:svnBochs:pnBochs:pvr:cvnBochs:ct1:cvr:
  dmi.product.name: Bochs
  dmi.sys.vendor: Bochs
  --- 
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Oct 27 01:22 seq
   crw-rw---- 1 root audio 116, 33 Oct 27 01:22 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.12.5-0ubuntu2.1
  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:
  DistroRelease: Ubuntu 13.10
  HibernationDevice: RESUME=UUID=2447d766-b078-4ed0-87f3-c27412c10649
  InstallationDate: Installed on 2011-02-03 (1003 days ago)
  InstallationMedia: Ubuntu-Server 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  IwConfig:
   eth0      no wireless extensions.
   
   lo        no wireless extensions.
  Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: Bochs Bochs
  MarkForUpload: True
  Package: linux (not installed)
  PciMultimedia:
   
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 cirrusdrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic root=UUID=0dbf4328-2e66-42b3-88dd-b96a5c25b11d ro console=tty0 console=ttyS0,115200n8 quiet
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  RelatedPackageVersions:
   linux-restricted-modules-3.11.0-12-generic N/A
   linux-backports-modules-3.11.0-12-generic  N/A
   linux-firmware                             1.116
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  saucy
  Uname: Linux 3.11.0-12-generic x86_64
  UpgradeStatus: Upgraded to saucy on 2013-08-25 (69 days ago)
  UserGroups:
   
  dmi.bios.date: 01/01/2007
  dmi.bios.vendor: Bochs
  dmi.bios.version: Bochs
  dmi.chassis.type: 1
  dmi.chassis.vendor: Bochs
  dmi.modalias: dmi:bvnBochs:bvrBochs:bd01/01/2007:svnBochs:pnBochs:pvr:cvnBochs:ct1:cvr:
  dmi.product.name: Bochs
  dmi.sys.vendor: Bochs

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