Boot slow, "scanning for btrfs filesystems" takes 100 seconds
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
High
|
Unassigned |
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-
ProcVersionSign
Uname: Linux 3.19.0-16-generic x86_64
NonfreeKernelMo
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/dev/snd/
CurrentDesktop: Unity
Date: Sun May 31 08:53:37 2015
HibernationDevice: RESUME=
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=
RelatedPackageV
linux-
linux-
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.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.
dmi.modalias: dmi:bvnAmerican
dmi.product.name: To Be Filled By O.E.M.
dmi.product.
dmi.sys.vendor: To Be Filled By O.E.M.
Changed in linux (Ubuntu): | |
importance: | Undecided → High |
This change was made by a bot.