Public bug reported:
After starting `btrfs scrub start /` `dmesg` contains
```
[Mär13 21:49] INFO: task btrfs:841 blocked for more than 120 seconds.
[ +0,000009] Tainted: P W OE 4.8.0-41-generic #44-Ubuntu
[ +0,000005] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ +0,000007] btrfs D ffff9158a5cd3b08 0 841 26458 0x00000000
[ +0,000005] ffff9158a5cd3b08 00ffffffadd9f58b ffff915bad6e1d80
ffff915986fb2c40
[ +0,000004] ffff9158a5cd3ae8 ffff9158a5cd4000 ffff915bac310714
ffff915986fb2c40
[ +0,000002] 00000000ffffffff ffff915bac310718 ffff9158a5cd3b20
ffffffffae49bd35
[ +0,000003] Call Trace:
[ +0,000009] [<ffffffffae49bd35>] schedule+0x35/0x80
[ +0,000003] [<ffffffffae49bfde>] schedule_preempt_disabled+0xe/0x10
[ +0,000003] [<ffffffffae49dc19>] __mutex_lock_slowpath+0xb9/0x130
[ +0,000002] [<ffffffffae49dcaf>] mutex_lock+0x1f/0x30
[ +0,000033] [<ffffffffc0321423>] btrfs_relocate_block_group+0x1a3/0x2a0
[btrfs]
[ +0,000022] [<ffffffffc02f1e59>] btrfs_relocate_chunk.isra.40+0x49/0xd0
[btrfs]
[ +0,000018] [<ffffffffc02f3334>] __btrfs_balance+0x634/0xc70 [btrfs]
[ +0,000017] [<ffffffffc02f3c40>] btrfs_balance+0x2d0/0x5e0 [btrfs]
[ +0,000018] [<ffffffffc02ffb29>] btrfs_ioctl_balance+0x379/0x390 [btrfs]
[ +0,000018] [<ffffffffc030398b>] btrfs_ioctl+0xd1b/0x2010 [btrfs]
[ +0,000003] [<ffffffffae49b898>] ? __schedule+0x308/0x770
[ +0,000004] [<ffffffffadcf630c>] ? hrtimer_try_to_cancel+0x2c/0x120
[ +0,000002] [<ffffffffae49f7e6>] ? do_nanosleep+0x96/0xf0
[ +0,000003] [<ffffffffade48693>] do_vfs_ioctl+0xa3/0x610
[ +0,000003] [<ffffffffadcf60d0>] ? __hrtimer_init+0xa0/0xa0
[ +0,000002] [<ffffffffae49f7aa>] ? do_nanosleep+0x5a/0xf0
[ +0,000003] [<ffffffffade48c79>] SyS_ioctl+0x79/0x90
[ +0,000003] [<ffffffffae4a04f6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
[Mär13 21:51] INFO: task btrfs:841 blocked for more than 120 seconds.
[ +0,000010] Tainted: P W OE 4.8.0-41-generic #44-Ubuntu
[ +0,000004] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ +0,000007] btrfs D ffff9158a5cd3b08 0 841 26458 0x00000000
[ +0,000005] ffff9158a5cd3b08 00ffffffadd9f58b ffff915bad6e1d80
ffff915986fb2c40
[ +0,000003] ffff9158a5cd3ae8 ffff9158a5cd4000 ffff915bac310714
ffff915986fb2c40
[ +0,000003] 00000000ffffffff ffff915bac310718 ffff9158a5cd3b20
ffffffffae49bd35
[ +0,000003] Call Trace:
[ +0,000009] [<ffffffffae49bd35>] schedule+0x35/0x80
[ +0,000003] [<ffffffffae49bfde>] schedule_preempt_disabled+0xe/0x10
[ +0,000002] [<ffffffffae49dc19>] __mutex_lock_slowpath+0xb9/0x130
[ +0,000003] [<ffffffffae49dcaf>] mutex_lock+0x1f/0x30
[ +0,000034] [<ffffffffc0321423>] btrfs_relocate_block_group+0x1a3/0x2a0
[btrfs]
[ +0,000022] [<ffffffffc02f1e59>] btrfs_relocate_chunk.isra.40+0x49/0xd0
[btrfs]
[ +0,000018] [<ffffffffc02f3334>] __btrfs_balance+0x634/0xc70 [btrfs]
[ +0,000017] [<ffffffffc02f3c40>] btrfs_balance+0x2d0/0x5e0 [btrfs]
[ +0,000018] [<ffffffffc02ffb29>] btrfs_ioctl_balance+0x379/0x390 [btrfs]
[ +0,000018] [<ffffffffc030398b>] btrfs_ioctl+0xd1b/0x2010 [btrfs]
[ +0,000003] [<ffffffffae49b898>] ? __schedule+0x308/0x770
[ +0,000004] [<ffffffffadcf630c>] ? hrtimer_try_to_cancel+0x2c/0x120
[ +0,000003] [<ffffffffae49f7e6>] ? do_nanosleep+0x96/0xf0
[ +0,000002] [<ffffffffade48693>] do_vfs_ioctl+0xa3/0x610
[ +0,000003] [<ffffffffadcf60d0>] ? __hrtimer_init+0xa0/0xa0
[ +0,000003] [<ffffffffae49f7aa>] ? do_nanosleep+0x5a/0xf0
[ +0,000002] [<ffffffffade48c79>] SyS_ioctl+0x79/0x90
[ +0,000003] [<ffffffffae4a04f6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
[Mär13 21:53] INFO: task btrfs:841 blocked for more than 120 seconds.
[ +0,000011] Tainted: P W OE 4.8.0-41-generic #44-Ubuntu
[ +0,000005] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ +0,000032] btrfs D ffff9158a5cd3b08 0 841 26458 0x00000000
[ +0,000005] ffff9158a5cd3b08 00ffffffadd9f58b ffff915bad6e1d80
ffff915986fb2c40
[ +0,000003] ffff9158a5cd3ae8 ffff9158a5cd4000 ffff915bac310714
ffff915986fb2c40
[ +0,000003] 00000000ffffffff ffff915bac310718 ffff9158a5cd3b20
ffffffffae49bd35
[ +0,000003] Call Trace:
[ +0,000009] [<ffffffffae49bd35>] schedule+0x35/0x80
[ +0,000003] [<ffffffffae49bfde>] schedule_preempt_disabled+0xe/0x10
[ +0,000002] [<ffffffffae49dc19>] __mutex_lock_slowpath+0xb9/0x130
[ +0,000003] [<ffffffffae49dcaf>] mutex_lock+0x1f/0x30
[ +0,000033] [<ffffffffc0321423>] btrfs_relocate_block_group+0x1a3/0x2a0
[btrfs]
[ +0,000022] [<ffffffffc02f1e59>] btrfs_relocate_chunk.isra.40+0x49/0xd0
[btrfs]
[ +0,000018] [<ffffffffc02f3334>] __btrfs_balance+0x634/0xc70 [btrfs]
[ +0,000017] [<ffffffffc02f3c40>] btrfs_balance+0x2d0/0x5e0 [btrfs]
[ +0,000018] [<ffffffffc02ffb29>] btrfs_ioctl_balance+0x379/0x390 [btrfs]
[ +0,000018] [<ffffffffc030398b>] btrfs_ioctl+0xd1b/0x2010 [btrfs]
[ +0,000002] [<ffffffffae49b898>] ? __schedule+0x308/0x770
[ +0,000004] [<ffffffffadcf630c>] ? hrtimer_try_to_cancel+0x2c/0x120
[ +0,000003] [<ffffffffae49f7e6>] ? do_nanosleep+0x96/0xf0
[ +0,000004] [<ffffffffade48693>] do_vfs_ioctl+0xa3/0x610
[ +0,000002] [<ffffffffadcf60d0>] ? __hrtimer_init+0xa0/0xa0
[ +0,000003] [<ffffffffae49f7aa>] ? do_nanosleep+0x5a/0xf0
[ +0,000002] [<ffffffffade48c79>] SyS_ioctl+0x79/0x90
[ +0,000003] [<ffffffffae4a04f6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
[Mär13 21:55] INFO: task btrfs:841 blocked for more than 120 seconds.
[ +0,000011] Tainted: P W OE 4.8.0-41-generic #44-Ubuntu
[ +0,000006] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ +0,000009] btrfs D ffff9158a5cd3b08 0 841 26458 0x00000000
[ +0,000007] ffff9158a5cd3b08 00ffffffadd9f58b ffff915bad6e1d80
ffff915986fb2c40
[ +0,000004] ffff9158a5cd3ae8 ffff9158a5cd4000 ffff915bac310714
ffff915986fb2c40
[ +0,000003] 00000000ffffffff ffff915bac310718 ffff9158a5cd3b20
ffffffffae49bd35
[ +0,000015] Call Trace:
[ +0,000008] [<ffffffffae49bd35>] schedule+0x35/0x80
[ +0,000003] [<ffffffffae49bfde>] schedule_preempt_disabled+0xe/0x10
[ +0,000003] [<ffffffffae49dc19>] __mutex_lock_slowpath+0xb9/0x130
[ +0,000002] [<ffffffffae49dcaf>] mutex_lock+0x1f/0x30
[ +0,000032] [<ffffffffc0321423>] btrfs_relocate_block_group+0x1a3/0x2a0
[btrfs]
[ +0,000022] [<ffffffffc02f1e59>] btrfs_relocate_chunk.isra.40+0x49/0xd0
[btrfs]
[ +0,000022] [<ffffffffc02f3334>] __btrfs_balance+0x634/0xc70 [btrfs]
[ +0,000023] [<ffffffffc02f3c40>] btrfs_balance+0x2d0/0x5e0 [btrfs]
[ +0,000021] [<ffffffffc02ffb29>] btrfs_ioctl_balance+0x379/0x390 [btrfs]
[ +0,000022] [<ffffffffc030398b>] btrfs_ioctl+0xd1b/0x2010 [btrfs]
[ +0,000002] [<ffffffffae49b898>] ? __schedule+0x308/0x770
[ +0,000004] [<ffffffffadcf630c>] ? hrtimer_try_to_cancel+0x2c/0x120
[ +0,000004] [<ffffffffae49f7e6>] ? do_nanosleep+0x96/0xf0
[ +0,000002] [<ffffffffade48693>] do_vfs_ioctl+0xa3/0x610
[ +0,000003] [<ffffffffadcf60d0>] ? __hrtimer_init+0xa0/0xa0
[ +0,000003] [<ffffffffae49f7aa>] ? do_nanosleep+0x5a/0xf0
[ +0,000002] [<ffffffffade48c79>] SyS_ioctl+0x79/0x90
[ +0,000003] [<ffffffffae4a04f6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
[Mär13 21:57] INFO: task btrfs:841 blocked for more than 120 seconds.
[ +0,000011] Tainted: P W OE 4.8.0-41-generic #44-Ubuntu
[ +0,000005] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ +0,000009] btrfs D ffff9158a5cd3b08 0 841 26458 0x00000000
[ +0,000007] ffff9158a5cd3b08 00ffffffadd9f58b ffff915bad6e1d80
ffff915986fb2c40
[ +0,000004] ffff9158a5cd3ae8 ffff9158a5cd4000 ffff915bac310714
ffff915986fb2c40
[ +0,000004] 00000000ffffffff ffff915bac310718 ffff9158a5cd3b20
ffffffffae49bd35
[ +0,000004] Call Trace:
[ +0,000009] [<ffffffffae49bd35>] schedule+0x35/0x80
[ +0,000004] [<ffffffffae49bfde>] schedule_preempt_disabled+0xe/0x10
[ +0,000003] [<ffffffffae49dc19>] __mutex_lock_slowpath+0xb9/0x130
[ +0,000004] [<ffffffffae49dcaf>] mutex_lock+0x1f/0x30
[ +0,000038] [<ffffffffc0321423>] btrfs_relocate_block_group+0x1a3/0x2a0
[btrfs]
[ +0,000028] [<ffffffffc02f1e59>] btrfs_relocate_chunk.isra.40+0x49/0xd0
[btrfs]
[ +0,000024] [<ffffffffc02f3334>] __btrfs_balance+0x634/0xc70 [btrfs]
[ +0,000022] [<ffffffffc02f3c40>] btrfs_balance+0x2d0/0x5e0 [btrfs]
[ +0,000037] [<ffffffffc02ffb29>] btrfs_ioctl_balance+0x379/0x390 [btrfs]
[ +0,000018] [<ffffffffc030398b>] btrfs_ioctl+0xd1b/0x2010 [btrfs]
[ +0,000002] [<ffffffffae49b898>] ? __schedule+0x308/0x770
[ +0,000004] [<ffffffffadcf630c>] ? hrtimer_try_to_cancel+0x2c/0x120
[ +0,000003] [<ffffffffae49f7e6>] ? do_nanosleep+0x96/0xf0
[ +0,000002] [<ffffffffade48693>] do_vfs_ioctl+0xa3/0x610
[ +0,000003] [<ffffffffadcf60d0>] ? __hrtimer_init+0xa0/0xa0
[ +0,000003] [<ffffffffae49f7aa>] ? do_nanosleep+0x5a/0xf0
[ +0,000002] [<ffffffffade48c79>] SyS_ioctl+0x79/0x90
[ +0,000003] [<ffffffffae4a04f6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
[Mär13 21:59] INFO: task btrfs:841 blocked for more than 120 seconds.
[ +0,000009] Tainted: P W OE 4.8.0-41-generic #44-Ubuntu
[ +0,000004] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ +0,000007] btrfs D ffff9158a5cd3b08 0 841 26458 0x00000000
[ +0,000005] ffff9158a5cd3b08 00ffffffadd9f58b ffff915bad6e1d80
ffff915986fb2c40
[ +0,000003] ffff9158a5cd3ae8 ffff9158a5cd4000 ffff915bac310714
ffff915986fb2c40
[ +0,000003] 00000000ffffffff ffff915bac310718 ffff9158a5cd3b20
ffffffffae49bd35
[ +0,000003] Call Trace:
[ +0,000008] [<ffffffffae49bd35>] schedule+0x35/0x80
[ +0,000003] [<ffffffffae49bfde>] schedule_preempt_disabled+0xe/0x10
[ +0,000003] [<ffffffffae49dc19>] __mutex_lock_slowpath+0xb9/0x130
[ +0,000002] [<ffffffffae49dcaf>] mutex_lock+0x1f/0x30
[ +0,000031] [<ffffffffc0321423>] btrfs_relocate_block_group+0x1a3/0x2a0
[btrfs]
[ +0,000022] [<ffffffffc02f1e59>] btrfs_relocate_chunk.isra.40+0x49/0xd0
[btrfs]
[ +0,000018] [<ffffffffc02f3334>] __btrfs_balance+0x634/0xc70 [btrfs]
[ +0,000017] [<ffffffffc02f3c40>] btrfs_balance+0x2d0/0x5e0 [btrfs]
[ +0,000018] [<ffffffffc02ffb29>] btrfs_ioctl_balance+0x379/0x390 [btrfs]
[ +0,000018] [<ffffffffc030398b>] btrfs_ioctl+0xd1b/0x2010 [btrfs]
[ +0,000002] [<ffffffffae49b898>] ? __schedule+0x308/0x770
[ +0,000004] [<ffffffffadcf630c>] ? hrtimer_try_to_cancel+0x2c/0x120
[ +0,000003] [<ffffffffae49f7e6>] ? do_nanosleep+0x96/0xf0
[ +0,000002] [<ffffffffade48693>] do_vfs_ioctl+0xa3/0x610
[ +0,000003] [<ffffffffadcf60d0>] ? __hrtimer_init+0xa0/0xa0
[ +0,000003] [<ffffffffae49f7aa>] ? do_nanosleep+0x5a/0xf0
[ +0,000002] [<ffffffffade48c79>] SyS_ioctl+0x79/0x90
[ +0,000003] [<ffffffffae4a04f6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
```
and the scrub can't be aborted using `btrfs scrub cancel /` or the
cancelation triggers the messages.
ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: linux-image-4.8.0-41-generic 4.8.0-41.44
ProcVersionSignature: Ubuntu 4.8.0-41.44-generic 4.8.17
Uname: Linux 4.8.0-41-generic x86_64
NonfreeKernelModules: openafs zfs zunicode zcommon znvpair zavl
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
Date: Mon Mar 13 22:00:50 2017
HibernationDevice: RESUME=/dev/mapper/root-swap
InstallationDate: Installed on 2015-04-20 (693 days ago)
InstallationMedia: Ubuntu-Server 14.10 "Utopic Unicorn" - Release amd64
(20141022.2)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcEnviron:
TERM=screen.xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=de_DE.UTF-8
SHELL=/bin/bash
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.8.0-41-generic
root=/dev/mapper/root-root ro rootflags=subvol=@
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Es läuft
kein PulseAudio-Dienst oder nicht als Sessiondienst.
RelatedPackageVersions:
linux-restricted-modules-4.8.0-41-generic N/A
linux-backports-modules-4.8.0-41-generic N/A
linux-firmware 1.161.1
RfKill:
SourcePackage: linux
UpgradeStatus: Upgraded to yakkety on 2016-10-19 (145 days ago)
dmi.bios.date: 08/21/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.20
dmi.board.name: X99 Extreme3
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrP1.20:bd08/21/2014:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnX99Extreme3:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug yakkety
** Description changed:
After starting `btrfs scrub start /` `dmesg` contains
```
[Mär13 21:49] INFO: task btrfs:841 blocked for more than 120 seconds.
[ +0,000009] Tainted: P W OE 4.8.0-41-generic #44-Ubuntu
[ +0,000005] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ +0,000007] btrfs D ffff9158a5cd3b08 0 841 26458 0x00000000
[ +0,000005] ffff9158a5cd3b08 00ffffffadd9f58b ffff915bad6e1d80
ffff915986fb2c40
[ +0,000004] ffff9158a5cd3ae8 ffff9158a5cd4000 ffff915bac310714
ffff915986fb2c40
[ +0,000002] 00000000ffffffff ffff915bac310718 ffff9158a5cd3b20
ffffffffae49bd35
[ +0,000003] Call Trace:
[ +0,000009] [<ffffffffae49bd35>] schedule+0x35/0x80
[ +0,000003] [<ffffffffae49bfde>] schedule_preempt_disabled+0xe/0x10
[ +0,000003] [<ffffffffae49dc19>] __mutex_lock_slowpath+0xb9/0x130
[ +0,000002] [<ffffffffae49dcaf>] mutex_lock+0x1f/0x30
[ +0,000033] [<ffffffffc0321423>] btrfs_relocate_block_group+0x1a3/0x2a0
[btrfs]
[ +0,000022] [<ffffffffc02f1e59>] btrfs_relocate_chunk.isra.40+0x49/0xd0
[btrfs]
[ +0,000018] [<ffffffffc02f3334>] __btrfs_balance+0x634/0xc70 [btrfs]
[ +0,000017] [<ffffffffc02f3c40>] btrfs_balance+0x2d0/0x5e0 [btrfs]
[ +0,000018] [<ffffffffc02ffb29>] btrfs_ioctl_balance+0x379/0x390 [btrfs]
[ +0,000018] [<ffffffffc030398b>] btrfs_ioctl+0xd1b/0x2010 [btrfs]
[ +0,000003] [<ffffffffae49b898>] ? __schedule+0x308/0x770
[ +0,000004] [<ffffffffadcf630c>] ? hrtimer_try_to_cancel+0x2c/0x120
[ +0,000002] [<ffffffffae49f7e6>] ? do_nanosleep+0x96/0xf0
[ +0,000003] [<ffffffffade48693>] do_vfs_ioctl+0xa3/0x610
[ +0,000003] [<ffffffffadcf60d0>] ? __hrtimer_init+0xa0/0xa0
[ +0,000002] [<ffffffffae49f7aa>] ? do_nanosleep+0x5a/0xf0
[ +0,000003] [<ffffffffade48c79>] SyS_ioctl+0x79/0x90
[ +0,000003] [<ffffffffae4a04f6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
[Mär13 21:51] INFO: task btrfs:841 blocked for more than 120 seconds.
[ +0,000010] Tainted: P W OE 4.8.0-41-generic #44-Ubuntu
[ +0,000004] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ +0,000007] btrfs D ffff9158a5cd3b08 0 841 26458 0x00000000
[ +0,000005] ffff9158a5cd3b08 00ffffffadd9f58b ffff915bad6e1d80
ffff915986fb2c40
[ +0,000003] ffff9158a5cd3ae8 ffff9158a5cd4000 ffff915bac310714
ffff915986fb2c40
[ +0,000003] 00000000ffffffff ffff915bac310718 ffff9158a5cd3b20
ffffffffae49bd35
[ +0,000003] Call Trace:
[ +0,000009] [<ffffffffae49bd35>] schedule+0x35/0x80
[ +0,000003] [<ffffffffae49bfde>] schedule_preempt_disabled+0xe/0x10
[ +0,000002] [<ffffffffae49dc19>] __mutex_lock_slowpath+0xb9/0x130
[ +0,000003] [<ffffffffae49dcaf>] mutex_lock+0x1f/0x30
[ +0,000034] [<ffffffffc0321423>] btrfs_relocate_block_group+0x1a3/0x2a0
[btrfs]
[ +0,000022] [<ffffffffc02f1e59>] btrfs_relocate_chunk.isra.40+0x49/0xd0
[btrfs]
[ +0,000018] [<ffffffffc02f3334>] __btrfs_balance+0x634/0xc70 [btrfs]
[ +0,000017] [<ffffffffc02f3c40>] btrfs_balance+0x2d0/0x5e0 [btrfs]
[ +0,000018] [<ffffffffc02ffb29>] btrfs_ioctl_balance+0x379/0x390 [btrfs]
[ +0,000018] [<ffffffffc030398b>] btrfs_ioctl+0xd1b/0x2010 [btrfs]
[ +0,000003] [<ffffffffae49b898>] ? __schedule+0x308/0x770
[ +0,000004] [<ffffffffadcf630c>] ? hrtimer_try_to_cancel+0x2c/0x120
[ +0,000003] [<ffffffffae49f7e6>] ? do_nanosleep+0x96/0xf0
[ +0,000002] [<ffffffffade48693>] do_vfs_ioctl+0xa3/0x610
[ +0,000003] [<ffffffffadcf60d0>] ? __hrtimer_init+0xa0/0xa0
[ +0,000003] [<ffffffffae49f7aa>] ? do_nanosleep+0x5a/0xf0
[ +0,000002] [<ffffffffade48c79>] SyS_ioctl+0x79/0x90
[ +0,000003] [<ffffffffae4a04f6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
[Mär13 21:53] INFO: task btrfs:841 blocked for more than 120 seconds.
[ +0,000011] Tainted: P W OE 4.8.0-41-generic #44-Ubuntu
[ +0,000005] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ +0,000032] btrfs D ffff9158a5cd3b08 0 841 26458 0x00000000
[ +0,000005] ffff9158a5cd3b08 00ffffffadd9f58b ffff915bad6e1d80
ffff915986fb2c40
[ +0,000003] ffff9158a5cd3ae8 ffff9158a5cd4000 ffff915bac310714
ffff915986fb2c40
[ +0,000003] 00000000ffffffff ffff915bac310718 ffff9158a5cd3b20
ffffffffae49bd35
[ +0,000003] Call Trace:
[ +0,000009] [<ffffffffae49bd35>] schedule+0x35/0x80
[ +0,000003] [<ffffffffae49bfde>] schedule_preempt_disabled+0xe/0x10
[ +0,000002] [<ffffffffae49dc19>] __mutex_lock_slowpath+0xb9/0x130
[ +0,000003] [<ffffffffae49dcaf>] mutex_lock+0x1f/0x30
[ +0,000033] [<ffffffffc0321423>] btrfs_relocate_block_group+0x1a3/0x2a0
[btrfs]
[ +0,000022] [<ffffffffc02f1e59>] btrfs_relocate_chunk.isra.40+0x49/0xd0
[btrfs]
[ +0,000018] [<ffffffffc02f3334>] __btrfs_balance+0x634/0xc70 [btrfs]
[ +0,000017] [<ffffffffc02f3c40>] btrfs_balance+0x2d0/0x5e0 [btrfs]
[ +0,000018] [<ffffffffc02ffb29>] btrfs_ioctl_balance+0x379/0x390 [btrfs]
[ +0,000018] [<ffffffffc030398b>] btrfs_ioctl+0xd1b/0x2010 [btrfs]
[ +0,000002] [<ffffffffae49b898>] ? __schedule+0x308/0x770
[ +0,000004] [<ffffffffadcf630c>] ? hrtimer_try_to_cancel+0x2c/0x120
[ +0,000003] [<ffffffffae49f7e6>] ? do_nanosleep+0x96/0xf0
[ +0,000004] [<ffffffffade48693>] do_vfs_ioctl+0xa3/0x610
[ +0,000002] [<ffffffffadcf60d0>] ? __hrtimer_init+0xa0/0xa0
[ +0,000003] [<ffffffffae49f7aa>] ? do_nanosleep+0x5a/0xf0
[ +0,000002] [<ffffffffade48c79>] SyS_ioctl+0x79/0x90
[ +0,000003] [<ffffffffae4a04f6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
[Mär13 21:55] INFO: task btrfs:841 blocked for more than 120 seconds.
[ +0,000011] Tainted: P W OE 4.8.0-41-generic #44-Ubuntu
[ +0,000006] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ +0,000009] btrfs D ffff9158a5cd3b08 0 841 26458 0x00000000
[ +0,000007] ffff9158a5cd3b08 00ffffffadd9f58b ffff915bad6e1d80
ffff915986fb2c40
[ +0,000004] ffff9158a5cd3ae8 ffff9158a5cd4000 ffff915bac310714
ffff915986fb2c40
[ +0,000003] 00000000ffffffff ffff915bac310718 ffff9158a5cd3b20
ffffffffae49bd35
[ +0,000015] Call Trace:
[ +0,000008] [<ffffffffae49bd35>] schedule+0x35/0x80
[ +0,000003] [<ffffffffae49bfde>] schedule_preempt_disabled+0xe/0x10
[ +0,000003] [<ffffffffae49dc19>] __mutex_lock_slowpath+0xb9/0x130
[ +0,000002] [<ffffffffae49dcaf>] mutex_lock+0x1f/0x30
[ +0,000032] [<ffffffffc0321423>] btrfs_relocate_block_group+0x1a3/0x2a0
[btrfs]
[ +0,000022] [<ffffffffc02f1e59>] btrfs_relocate_chunk.isra.40+0x49/0xd0
[btrfs]
[ +0,000022] [<ffffffffc02f3334>] __btrfs_balance+0x634/0xc70 [btrfs]
[ +0,000023] [<ffffffffc02f3c40>] btrfs_balance+0x2d0/0x5e0 [btrfs]
[ +0,000021] [<ffffffffc02ffb29>] btrfs_ioctl_balance+0x379/0x390 [btrfs]
[ +0,000022] [<ffffffffc030398b>] btrfs_ioctl+0xd1b/0x2010 [btrfs]
[ +0,000002] [<ffffffffae49b898>] ? __schedule+0x308/0x770
[ +0,000004] [<ffffffffadcf630c>] ? hrtimer_try_to_cancel+0x2c/0x120
[ +0,000004] [<ffffffffae49f7e6>] ? do_nanosleep+0x96/0xf0
[ +0,000002] [<ffffffffade48693>] do_vfs_ioctl+0xa3/0x610
[ +0,000003] [<ffffffffadcf60d0>] ? __hrtimer_init+0xa0/0xa0
[ +0,000003] [<ffffffffae49f7aa>] ? do_nanosleep+0x5a/0xf0
[ +0,000002] [<ffffffffade48c79>] SyS_ioctl+0x79/0x90
[ +0,000003] [<ffffffffae4a04f6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
[Mär13 21:57] INFO: task btrfs:841 blocked for more than 120 seconds.
[ +0,000011] Tainted: P W OE 4.8.0-41-generic #44-Ubuntu
[ +0,000005] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ +0,000009] btrfs D ffff9158a5cd3b08 0 841 26458 0x00000000
[ +0,000007] ffff9158a5cd3b08 00ffffffadd9f58b ffff915bad6e1d80
ffff915986fb2c40
[ +0,000004] ffff9158a5cd3ae8 ffff9158a5cd4000 ffff915bac310714
ffff915986fb2c40
[ +0,000004] 00000000ffffffff ffff915bac310718 ffff9158a5cd3b20
ffffffffae49bd35
[ +0,000004] Call Trace:
[ +0,000009] [<ffffffffae49bd35>] schedule+0x35/0x80
[ +0,000004] [<ffffffffae49bfde>] schedule_preempt_disabled+0xe/0x10
[ +0,000003] [<ffffffffae49dc19>] __mutex_lock_slowpath+0xb9/0x130
[ +0,000004] [<ffffffffae49dcaf>] mutex_lock+0x1f/0x30
[ +0,000038] [<ffffffffc0321423>] btrfs_relocate_block_group+0x1a3/0x2a0
[btrfs]
[ +0,000028] [<ffffffffc02f1e59>] btrfs_relocate_chunk.isra.40+0x49/0xd0
[btrfs]
[ +0,000024] [<ffffffffc02f3334>] __btrfs_balance+0x634/0xc70 [btrfs]
[ +0,000022] [<ffffffffc02f3c40>] btrfs_balance+0x2d0/0x5e0 [btrfs]
[ +0,000037] [<ffffffffc02ffb29>] btrfs_ioctl_balance+0x379/0x390 [btrfs]
[ +0,000018] [<ffffffffc030398b>] btrfs_ioctl+0xd1b/0x2010 [btrfs]
[ +0,000002] [<ffffffffae49b898>] ? __schedule+0x308/0x770
[ +0,000004] [<ffffffffadcf630c>] ? hrtimer_try_to_cancel+0x2c/0x120
[ +0,000003] [<ffffffffae49f7e6>] ? do_nanosleep+0x96/0xf0
[ +0,000002] [<ffffffffade48693>] do_vfs_ioctl+0xa3/0x610
[ +0,000003] [<ffffffffadcf60d0>] ? __hrtimer_init+0xa0/0xa0
[ +0,000003] [<ffffffffae49f7aa>] ? do_nanosleep+0x5a/0xf0
[ +0,000002] [<ffffffffade48c79>] SyS_ioctl+0x79/0x90
[ +0,000003] [<ffffffffae4a04f6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
[Mär13 21:59] INFO: task btrfs:841 blocked for more than 120 seconds.
[ +0,000009] Tainted: P W OE 4.8.0-41-generic #44-Ubuntu
[ +0,000004] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ +0,000007] btrfs D ffff9158a5cd3b08 0 841 26458 0x00000000
[ +0,000005] ffff9158a5cd3b08 00ffffffadd9f58b ffff915bad6e1d80
ffff915986fb2c40
[ +0,000003] ffff9158a5cd3ae8 ffff9158a5cd4000 ffff915bac310714
ffff915986fb2c40
[ +0,000003] 00000000ffffffff ffff915bac310718 ffff9158a5cd3b20
ffffffffae49bd35
[ +0,000003] Call Trace:
[ +0,000008] [<ffffffffae49bd35>] schedule+0x35/0x80
[ +0,000003] [<ffffffffae49bfde>] schedule_preempt_disabled+0xe/0x10
[ +0,000003] [<ffffffffae49dc19>] __mutex_lock_slowpath+0xb9/0x130
[ +0,000002] [<ffffffffae49dcaf>] mutex_lock+0x1f/0x30
[ +0,000031] [<ffffffffc0321423>] btrfs_relocate_block_group+0x1a3/0x2a0
[btrfs]
[ +0,000022] [<ffffffffc02f1e59>] btrfs_relocate_chunk.isra.40+0x49/0xd0
[btrfs]
[ +0,000018] [<ffffffffc02f3334>] __btrfs_balance+0x634/0xc70 [btrfs]
[ +0,000017] [<ffffffffc02f3c40>] btrfs_balance+0x2d0/0x5e0 [btrfs]
[ +0,000018] [<ffffffffc02ffb29>] btrfs_ioctl_balance+0x379/0x390 [btrfs]
[ +0,000018] [<ffffffffc030398b>] btrfs_ioctl+0xd1b/0x2010 [btrfs]
[ +0,000002] [<ffffffffae49b898>] ? __schedule+0x308/0x770
[ +0,000004] [<ffffffffadcf630c>] ? hrtimer_try_to_cancel+0x2c/0x120
[ +0,000003] [<ffffffffae49f7e6>] ? do_nanosleep+0x96/0xf0
[ +0,000002] [<ffffffffade48693>] do_vfs_ioctl+0xa3/0x610
[ +0,000003] [<ffffffffadcf60d0>] ? __hrtimer_init+0xa0/0xa0
[ +0,000003] [<ffffffffae49f7aa>] ? do_nanosleep+0x5a/0xf0
[ +0,000002] [<ffffffffade48c79>] SyS_ioctl+0x79/0x90
[ +0,000003] [<ffffffffae4a04f6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
```
+
+ and the scrub can't be aborted using `btrfs scrub cancel /` or the
+ cancelation triggers the messages.
ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: linux-image-4.8.0-41-generic 4.8.0-41.44
ProcVersionSignature: Ubuntu 4.8.0-41.44-generic 4.8.17
Uname: Linux 4.8.0-41-generic x86_64
NonfreeKernelModules: openafs zfs zunicode zcommon znvpair zavl
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
Date: Mon Mar 13 22:00:50 2017
HibernationDevice: RESUME=/dev/mapper/root-swap
InstallationDate: Installed on 2015-04-20 (693 days ago)
InstallationMedia: Ubuntu-Server 14.10 "Utopic Unicorn" - Release amd64
(20141022.2)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcEnviron:
- TERM=screen.xterm-256color
- PATH=(custom, no user)
- XDG_RUNTIME_DIR=<set>
- LANG=de_DE.UTF-8
- SHELL=/bin/bash
+ TERM=screen.xterm-256color
+ PATH=(custom, no user)
+ XDG_RUNTIME_DIR=<set>
+ LANG=de_DE.UTF-8
+ SHELL=/bin/bash
ProcFB:
-
+
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.8.0-41-generic
root=/dev/mapper/root-root ro rootflags=subvol=@
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Es läuft
kein PulseAudio-Dienst oder nicht als Sessiondienst.
RelatedPackageVersions:
- linux-restricted-modules-4.8.0-41-generic N/A
- linux-backports-modules-4.8.0-41-generic N/A
- linux-firmware 1.161.1
+ linux-restricted-modules-4.8.0-41-generic N/A
+ linux-backports-modules-4.8.0-41-generic N/A
+ linux-firmware 1.161.1
RfKill:
-
+
SourcePackage: linux
UpgradeStatus: Upgraded to yakkety on 2016-10-19 (145 days ago)
dmi.bios.date: 08/21/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.20
dmi.board.name: X99 Extreme3
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrP1.20:bd08/21/2014:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnX99Extreme3:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
--
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https://bugs.launchpad.net/bugs/1672536
Title:
task btrfs:841 blocked for more than 120 seconds.
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