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** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- 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/1555828 Title: BTRFS Kernel trace - Terrible Write Performance Status in linux package in Ubuntu: Triaged Bug description: I am seeing this several times in the logs. I also installed a mainline upstream kernel and it still occurred in 4.5-rc7-wily. theark kernel: INFO: task btrfs-transacti:518 blocked for more than 120 seconds. Mar 10 14:00:44 theark kernel: Not tainted 4.2.0-27-generic #32-Ubuntu Mar 10 14:00:44 theark kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Mar 10 14:00:44 theark kernel: btrfs-transacti D ffff88041f296640 0 518 2 0x00000000 Mar 10 14:00:44 theark kernel: ffff8803e0eafdb8 0000000000000046 ffff88040cdaa940 ffff88040c8dee00 Mar 10 14:00:44 theark kernel: 0000000000000246 ffff8803e0eb0000 ffff880409d44178 ffff88040997f800 Mar 10 14:00:44 theark kernel: ffff8803e0eafdf8 ffff880409d441d8 ffff8803e0eafdd8 ffffffff817edc37 Mar 10 14:00:44 theark kernel: Call Trace: Mar 10 14:00:44 theark kernel: [<ffffffff817edc37>] schedule+0x37/0x80 Mar 10 14:00:44 theark kernel: [<ffffffffc0324b43>] btrfs_commit_transaction+0x423/0xb20 [btrfs] Mar 10 14:00:44 theark kernel: [<ffffffff810bd760>] ? wake_atomic_t_function+0x60/0x60 Mar 10 14:00:44 theark kernel: [<ffffffffc031fe39>] transaction_kthread+0x229/0x240 [btrfs] Mar 10 14:00:44 theark kernel: [<ffffffffc031fc10>] ? btrfs_cleanup_transaction+0x550/0x550 [btrfs] Mar 10 14:00:44 theark kernel: [<ffffffff8109ae38>] kthread+0xd8/0xf0 Mar 10 14:00:44 theark kernel: [<ffffffff8109ad60>] ? kthread_create_on_node+0x1f0/0x1f0 Mar 10 14:00:44 theark kernel: [<ffffffff817f209f>] ret_from_fork+0x3f/0x70 Mar 10 14:00:44 theark kernel: [<ffffffff8109ad60>] ? kthread_create_on_node+0x1f0/0x1f0 ProblemType: Bug DistroRelease: Ubuntu 15.10 Package: linux-image-4.2.0-27-generic 4.2.0-27.32 ProcVersionSignature: Ubuntu 4.2.0-27.32-generic 4.2.8-ckt1 Uname: Linux 4.2.0-27-generic x86_64 ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D3', '/dev/snd/hwC0D2', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D2c', '/dev/snd/pcmC0D2p', '/dev/snd/pcmC0D1p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Thu Mar 10 13:59:12 2016 HibernationDevice: RESUME=/dev/mapper/sda5_crypt InstallationDate: Installed on 2015-05-10 (305 days ago) InstallationMedia: Ubuntu-Server 15.04 "Vivid Vervet" - Release amd64 (20150422) IwConfig: p1p1 no wireless extensions. br0 no wireless extensions. lo no wireless extensions. MachineType: Gigabyte Technology Co., Ltd. To be filled by O.E.M. ProcEnviron: TERM=screen PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-27-generic.efi.signed root=UUID=51a981ad-aeb0-4bd7-91c6-2d493155c812 ro rootflags=subvol=@ quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-4.2.0-27-generic N/A linux-backports-modules-4.2.0-27-generic N/A linux-firmware 1.156 RfKill: SourcePackage: linux UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: Upgraded to wily on 2015-10-26 (136 days ago) dmi.bios.date: 01/06/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: F18i dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: Z77X-D3H dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: Gigabyte Technology Co., Ltd. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF18i:bd01/06/2014:svnGigabyteTechnologyCo.,Ltd.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnZ77X-D3H:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.: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: Gigabyte Technology Co., Ltd. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1555828/+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
