This issue started with the version 4.13 series. The last version that
did not have the issue is 4.11.0-14.
Mainline kernel version 4.17-rc4 also exhibits the issue.
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1752961
Title:
With kernel 4.13 btrfs scans for devices before all devices have been
discovered
Status in linux package in Ubuntu:
Confirmed
Bug description:
See attached dmesg outputs for booting kernels 4.11.x (working) and
4.13.x (not working).
dmesg-4.11.0-14-good.txt shows the dmesg output when booting kernel 4.11.x.
btrfs scans for devices after all 4 (sda, sdb, sdc, sdd) of the devices have
been discovered by the kernel. The btrfs RAID1 filesystem mounts, and
everything is good.
dmesg-4.13.0-36-fail.txt shows the dmesg output when booting kernel 4.13.x.
btrfs scans for devices after only 2 (sda, sdb) of the devices have been
discovered by the kernel. The btrfs RAID1 filesystem fails to mount ("failed
to read the system array: -5"). The remaining 2 devices (sdc, sdd) are
discovered by the kernel immediately afterward. At the end of the log, I run
`btrfs device scan` and mount the filesystem manually.
Hardware:
HP ProLiant MicroServer Gen8
4x WDC WD20EFRX
---
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code
2: ls: cannot access '/dev/snd/': No such file or directory
AplayDevices: aplay: device_list:270: no soundcards found...
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
ArecordDevices: arecord: device_list:270: no soundcards found...
DistroRelease: Ubuntu 18.04
InstallationDate: Installed on 2015-10-15 (933 days ago)
InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422.1)
MachineType: HP ProLiant MicroServer Gen8
Package: linux (not installed)
ProcEnviron:
TERM=linux
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.15.0-20-generic
root=UUID=d976ab07-8377-46dd-ac6c-f5f7312a8305 ro rootflags=subvol=@
rootdelay=10
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
Tags: bionic apport-hook-error
Uname: Linux 4.15.0-20-generic x86_64
UnreportableReason: This report is about a package that is not installed.
UpgradeStatus: Upgraded to bionic on 2018-05-05 (0 days ago)
UserGroups:
_MarkForUpload: True
dmi.bios.date: 07/16/2015
dmi.bios.vendor: HP
dmi.bios.version: J06
dmi.chassis.type: 7
dmi.chassis.vendor: HP
dmi.modalias:
dmi:bvnHP:bvrJ06:bd07/16/2015:svnHP:pnProLiantMicroServerGen8:pvr:cvnHP:ct7:cvr:
dmi.product.family: ProLiant
dmi.product.name: ProLiant MicroServer Gen8
dmi.sys.vendor: HP
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