This is back with 16.04, and affects multiple systems. -- 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/1460447
Title: Boot slow, "scanning for btrfs filesystems" takes 100 seconds Status in linux package in Ubuntu: Confirmed Bug description: I installed 14.10 and used btrfs for /home. Later, I did a clean install of 15.04, using the same /home partition. Ever since then, boots have been agonizingly slow; all the delay appears to be while the message "scanning for btrfs filesystems" is diplayed early in boot. The system is an i7 with one disk: root@i7:~# fdisk /dev/sda Disk /dev/sda: 931.5 GiB, 1000204886016 bytes, 1953525168 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disklabel type: dos Disk identifier: 0x00007f84 Device Boot Start End Sectors Size Id Type /dev/sda1 * 2048 117186559 117184512 55.9G 83 Linux /dev/sda2 117186560 234373119 117186560 55.9G 83 Linux /dev/sda3 234375166 1953523711 1719148546 819.8G 5 Extended /dev/sda5 234375168 273434623 39059456 18.6G 82 Linux swap / Solaris /dev/sda6 273436672 1953523711 1680087040 801.1G 83 Linux root@i7:~# df -T | grep sd /dev/sda2 ext4 57542652 10103624 44492980 19% / /dev/sda6 btrfs 840043520 172076728 665321064 21% /home I'll attach a bootchart, but I suspect the btrfs delay happens before the bootchart starts? ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: linux-image-3.19.0-16-generic 3.19.0-16.16 ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3 Uname: Linux 3.19.0-16-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.17.2-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: dank 2176 F.... pulseaudio /dev/snd/controlC0: dank 2176 F.... pulseaudio CurrentDesktop: Unity Date: Sun May 31 08:53:37 2015 HibernationDevice: RESUME=UUID=417f2bba-dea3-496b-ad18-702d4dc6f223 InstallationDate: Installed on 2015-05-16 (14 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) IwConfig: eth0 no wireless extensions. lo no wireless extensions. lxcbr0 no wireless extensions. MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-16-generic root=UUID=270a0d36-9ed9-4e58-b909-175db447838d ro quiet splash init=/lib/systemd/systemd-bootchart RelatedPackageVersions: linux-restricted-modules-3.19.0-16-generic N/A linux-backports-modules-3.19.0-16-generic N/A linux-firmware 1.143 RfKill: SourcePackage: linux UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev' UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/16/2010 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P2.50 dmi.board.name: X58 Extreme 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.:bvrP2.50:bd08/16/2010:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnX58Extreme: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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1460447/+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
