** 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. + + The cancelation finally succeeds after about 30 minutes. Only the + messages above where logged, i.e. the logging isn't repeated every 2 + minutes until the cancelation succeeds. 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.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1672536 Title: task btrfs:841 blocked for more than 120 seconds. Status in linux package in Ubuntu: Confirmed Bug description: 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. The cancelation finally succeeds after about 30 minutes. Only the messages above where logged, i.e. the logging isn't repeated every 2 minutes until the cancelation succeeds. 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. 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