The oops: Aug 7 16:47:42 wedgeamb kernel: [ 2640.306142] INFO: task kworker/u24:1:9703 blocked for more than 120 seconds. Aug 7 16:47:42 wedgeamb kernel: [ 2640.306176] Tainted: P O 4.4.0-131-generic #157-Ubuntu Aug 7 16:47:42 wedgeamb kernel: [ 2640.306204] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Aug 7 16:47:42 wedgeamb kernel: [ 2640.306235] kworker/u24:1 D ffff880038b1f858 0 9703 2 0x00000000 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306245] Workqueue: writeback wb_workfn (flush-zfs-2) Aug 7 16:47:42 wedgeamb kernel: [ 2640.306248] ffff880038b1f858 2980c1b4a2885446 ffff88085b6b8e00 ffff88085496c600 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306251] ffff880038b20000 ffff88085f2572c0 7fffffffffffffff ffff880038b1f9c8 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306254] ffffffff8184f8e0 ffff880038b1f870 ffffffff8184f0e5 0000000000000000 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306257] Call Trace: Aug 7 16:47:42 wedgeamb kernel: [ 2640.306266] [<ffffffff8184f8e0>] ? bit_wait+0x60/0x60 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306270] [<ffffffff8184f0e5>] schedule+0x35/0x80 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306273] [<ffffffff81852276>] schedule_timeout+0x1b6/0x270 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306330] [<ffffffffc06ea648>] ? rrm_exit+0x48/0x80 [zfs] Aug 7 16:47:42 wedgeamb kernel: [ 2640.306336] [<ffffffff810fa3fe>] ? ktime_get+0x3e/0xb0 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306340] [<ffffffff8184f8e0>] ? bit_wait+0x60/0x60 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306343] [<ffffffff8184e854>] io_schedule_timeout+0xa4/0x110 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306347] [<ffffffff8184f8fb>] bit_wait_io+0x1b/0x70 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306350] [<ffffffff8184f680>] __wait_on_bit_lock+0x50/0xb0 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306354] [<ffffffff81193bab>] __lock_page+0xbb/0xe0 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306359] [<ffffffff810c80f0>] ? autoremove_wake_function+0x40/0x40 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306364] [<ffffffff811a0480>] write_cache_pages+0x2e0/0x510 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306409] [<ffffffffc0754de0>] ? zpl_write_common_iovec+0xe0/0xe0 [zfs] Aug 7 16:47:42 wedgeamb kernel: [ 2640.306413] [<ffffffff81851052>] ? mutex_lock+0x12/0x30 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306448] [<ffffffffc06ea300>] ? rrw_exit+0x60/0x150 [zfs] Aug 7 16:47:42 wedgeamb kernel: [ 2640.306492] [<ffffffffc0754f24>] zpl_writepages+0x94/0x170 [zfs] Aug 7 16:47:42 wedgeamb kernel: [ 2640.306495] [<ffffffff811a2bc1>] do_writepages+0x21/0x30 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306499] [<ffffffff81244aa5>] __writeback_single_inode+0x45/0x350 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306503] [<ffffffff812452d2>] writeback_sb_inodes+0x262/0x600 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306506] [<ffffffff812456fc>] __writeback_inodes_wb+0x8c/0xc0 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306510] [<ffffffff81245a59>] wb_writeback+0x259/0x310 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306514] [<ffffffff8124617a>] wb_workfn+0x19a/0x3a0 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306518] [<ffffffff8109de7b>] process_one_work+0x16b/0x490 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306522] [<ffffffff8109e1eb>] worker_thread+0x4b/0x4d0 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306525] [<ffffffff8109e1a0>] ? process_one_work+0x490/0x490 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306529] [<ffffffff810a45b7>] kthread+0xe7/0x100 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306532] [<ffffffff810a44d0>] ? kthread_create_on_node+0x1e0/0x1e0 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306535] [<ffffffff818536f5>] ret_from_fork+0x55/0x80 Aug 7 16:47:42 wedgeamb kernel: [ 2640.306538] [<ffffffff810a44d0>] ? kthread_create_on_node+0x1e0/0x1e0
** Description changed: After restoring a snapshot on a running container a hung task task oops trace gets logged for flush-zfs. The command run was: % lxc restore wedgeiq foo1 If the container is not running restoring seems less likely to cause the hung task. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-generic 4.4.0.131.137 ProcVersionSignature: Ubuntu 4.4.0-131.157-generic 4.4.134 Uname: Linux 4.4.0-131-generic x86_64 NonfreeKernelModules: zfs zunicode zcommon znvpair zavl AlsaDevices: - total 0 - crw-rw---- 1 root audio 116, 1 Aug 7 16:03 seq - crw-rw---- 1 root audio 116, 33 Aug 7 16:03 timer + total 0 + crw-rw---- 1 root audio 116, 1 Aug 7 16:03 seq + crw-rw---- 1 root audio 116, 33 Aug 7 16:03 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2.18 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Tue Aug 7 16:36:34 2018 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: - Bus 001 Device 002: ID 8087:8000 Intel Corp. - Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub - Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub - Bus 002 Device 002: ID 046d:c31c Logitech, Inc. Keyboard K120 - Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub + Bus 001 Device 002: ID 8087:8000 Intel Corp. + Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub + Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub + Bus 002 Device 002: ID 046d:c31c Logitech, Inc. Keyboard K120 + Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: NEXCOM NSA-5160 PciMultimedia: - + ProcEnviron: - SHELL=/bin/bash - TERM=xterm-256color - PATH=(custom, no user) - LANG=en_US.UTF-8 + SHELL=/bin/bash + TERM=xterm-256color + PATH=(custom, no user) + LANG=en_US.UTF-8 ProcFB: 0 astdrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-131-generic root=/dev/mapper/VG_WARP-WARPDRIVE ro intel_iommu=on net.ifnames=1 RelatedPackageVersions: - linux-restricted-modules-4.4.0-131-generic N/A - linux-backports-modules-4.4.0-131-generic N/A - linux-firmware 1.157.20 + linux-restricted-modules-4.4.0-131-generic N/A + linux-backports-modules-4.4.0-131-generic N/A + linux-firmware 1.157.20 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/25/2017 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 5.11 dmi.board.asset.tag: Default string dmi.board.name: Default string dmi.board.vendor: Default string dmi.board.version: Default string dmi.chassis.asset.tag: Default string dmi.chassis.type: 23 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5.11:bd07/25/2017:svnNEXCOM:pnNSA-5160:pvrDefaultstring:rvnDefaultstring:rnDefaultstring:rvrDefaultstring:cvnDefaultstring:ct23:cvrDefaultstring: dmi.product.name: NSA-5160 dmi.product.version: Default string dmi.sys.vendor: NEXCOM -- 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/1785856 Title: hung task flush-zfs Status in linux package in Ubuntu: Confirmed Bug description: After restoring a snapshot on a running container a hung task task oops trace gets logged for flush-zfs. The command run was: % lxc restore wedgeiq foo1 If the container is not running restoring seems less likely to cause the hung task. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-generic 4.4.0.131.137 ProcVersionSignature: Ubuntu 4.4.0-131.157-generic 4.4.134 Uname: Linux 4.4.0-131-generic x86_64 NonfreeKernelModules: zfs zunicode zcommon znvpair zavl AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Aug 7 16:03 seq crw-rw---- 1 root audio 116, 33 Aug 7 16:03 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.1-0ubuntu2.18 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Tue Aug 7 16:36:34 2018 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lsusb: Bus 001 Device 002: ID 8087:8000 Intel Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 002 Device 002: ID 046d:c31c Logitech, Inc. Keyboard K120 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: NEXCOM NSA-5160 PciMultimedia: ProcEnviron: SHELL=/bin/bash TERM=xterm-256color PATH=(custom, no user) LANG=en_US.UTF-8 ProcFB: 0 astdrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-131-generic root=/dev/mapper/VG_WARP-WARPDRIVE ro intel_iommu=on net.ifnames=1 RelatedPackageVersions: linux-restricted-modules-4.4.0-131-generic N/A linux-backports-modules-4.4.0-131-generic N/A linux-firmware 1.157.20 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/25/2017 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 5.11 dmi.board.asset.tag: Default string dmi.board.name: Default string dmi.board.vendor: Default string dmi.board.version: Default string dmi.chassis.asset.tag: Default string dmi.chassis.type: 23 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5.11:bd07/25/2017:svnNEXCOM:pnNSA-5160:pvrDefaultstring:rvnDefaultstring:rnDefaultstring:rvrDefaultstring:cvnDefaultstring:ct23:cvrDefaultstring: dmi.product.name: NSA-5160 dmi.product.version: Default string dmi.sys.vendor: NEXCOM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1785856/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
