Tested with bionic-proposed + patch (problem does not happen) --- Test kernel available in: https://people.canonical.com/~mfo/lp1837788/linux_4.15.0-56.62+test20190725b1_amd64/
# uname -rv 4.15.0-56-generic #62+test20190725b1 SMP Thu Jul 25 12:44:16 -03 2019 # ./setup-bcache-wb_percent-before-attach.sh >/dev/null 2>&1 # [ 61.772497] bcache: register_bdev() registered backing device loop0/null 2>&1 [ 61.789479] bcache: run_cache_set() invalidating existing data [ 61.799599] bcache: register_cache() registered cache device loop1 [ 65.772621] bcache: bch_cached_dev_attach() Caching loop0 as bcache0 on set 2c09c59b-35b1-4da7-8225-d143c1ea81d2 # reboot # # comment last line in script. # ./setup-bcache-wb_percent-before-attach.sh >/dev/null 2>&1 # [ 36.853197] bcache: register_bdev() registered backing device loop0/null 2>&1 [ 36.885302] bcache: run_cache_set() invalidating existing data [ 36.896425] bcache: register_cache() registered cache device loop1 (wait a few seconds) (ok no oops anymore) -- 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/1837788 Title: bcache kernel warning when attaching device Status in linux package in Ubuntu: Invalid Status in linux source package in Bionic: Confirmed Status in linux source package in Disco: Confirmed Status in linux source package in Eoan: Invalid Bug description: See attached dmesg, each time this server is rebooted it emits a concerning bcache warning. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-54-generic 4.15.0-54.58 ProcVersionSignature: Ubuntu 4.15.0-54.58-generic 4.15.18 Uname: Linux 4.15.0-54-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.15.0-54-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.9-0ubuntu7.7 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D2', '/dev/snd/pcmC0D2c', '/dev/snd/pcmC0D3c', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/hwC1D0', '/dev/snd/pcmC1D3p', '/dev/snd/controlC1', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer': 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer': 'amixer' Card1.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer': 'amixer' Card1.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer': 'amixer' Date: Wed Jul 24 12:28:06 2019 InstallationDate: Installed on 2013-10-04 (2119 days ago) InstallationMedia: Ubuntu-Server 13.10 "Saucy Salamander" - Beta amd64 (20130925.1) MachineType: Supermicro X9DAi ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-54-generic root=UUID=8577302d-1f37-40a6-afcd-385beb26059f ro nomodeset elevator=deadline nvme_core.default_ps_max_latency_us=0 nopti noibrs noibpb RelatedPackageVersions: linux-restricted-modules-4.15.0-54-generic N/A linux-backports-modules-4.15.0-54-generic N/A linux-firmware 1.173.9 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' SourcePackage: linux UpgradeStatus: Upgraded to bionic on 2018-06-09 (409 days ago) dmi.bios.date: 05/09/2015 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 3.2 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: X9DAi dmi.board.vendor: Supermicro dmi.board.version: 0123456789 dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: Supermicro dmi.chassis.version: 0123456789 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3.2:bd05/09/2015:svnSupermicro:pnX9DAi:pvr0123456789:rvnSupermicro:rnX9DAi:rvr0123456789:cvnSupermicro:ct3:cvr0123456789: dmi.product.family: To be filled by O.E.M. dmi.product.name: X9DAi dmi.product.version: 0123456789 dmi.sys.vendor: Supermicro To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1837788/+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
