For what it is worth, I have a kernel issue that appears after upgrading from
4.15.0-88 to 4.15.0-91 and it still is present in 4.15.0-96.
For my system the kernel does not panic, however it eventually starts erroring
and then mounts /tmp as ro.
If I reboot in maintenance mode fsck the disk, fix errors and reboot, system
will repeat. However, booting back to 4.15.0-88 and system will come back up
and remain stable.
Once booting with kernal 4.15.0-91 or 4.15.0-96, syslog shows
Apr 12 00:06:00 Brushpass kernel: [34615.321379] sd 0:0:0:0: [sda] tag#1 Sense
Key : Medium Error [current]
Apr 12 00:06:00 Brushpass kernel: [34615.321383] sd 0:0:0:0: [sda] tag#1 Add.
Sense: Unrecovered read error - auto reallocate failed
Apr 12 00:06:00 Brushpass kernel: [34615.321386] sd 0:0:0:0: [sda] tag#1 CDB:
Read(10) 28 00 00 04 28 90 00 00 d0 00
Apr 12 00:06:00 Brushpass kernel: [34615.321389] print_req_error: I/O error,
dev sda, sector 272728
Apr 12 00:06:00 Brushpass kernel: [34615.321427] ata1: EH complete
Apr 12 00:06:03 Brushpass kernel: [34618.285416] ata1.00: exception Emask 0x0
SAct 0x6000 SErr 0x0 action 0x0
Apr 12 00:06:03 Brushpass kernel: [34618.285426] ata1.00: irq_stat 0x40000001
Apr 12 00:06:03 Brushpass kernel: [34618.285433] ata1.00: failed command: READ
FPDMA QUEUED
Apr 12 00:06:03 Brushpass kernel: [34618.285445] ata1.00: cmd
60/08:68:58:29:04/00:00:00:00:00/40 tag 13 ncq dma 4096 in
Apr 12 00:06:03 Brushpass kernel: [34618.285445] res
41/40:08:58:29:04/00:00:00:00:00/40 Emask 0x409 (media error) <F>
Apr 12 00:06:03 Brushpass kernel: [34618.285451] ata1.00: status: { DRDY ERR }
Apr 12 00:06:03 Brushpass kernel: [34618.285455] ata1.00: error: { UNC }
Apr 12 00:06:03 Brushpass kernel: [34618.285459] ata1.00: failed command: WRITE
FPDMA QUEUED
Apr 12 00:06:03 Brushpass kernel: [34618.285469] ata1.00: cmd
61/48:70:c0:88:86/01:00:1c:00:00/40 tag 14 ncq dma 167936 out
Apr 12 00:06:03 Brushpass kernel: [34618.285469] res
41/40:70:58:29:04/00:00:00:00:00/40 Emask 0x9 (media error)
Apr 12 00:06:03 Brushpass kernel: [34618.285474] ata1.00: status: { DRDY ERR }
Apr 12 00:06:03 Brushpass kernel: [34618.285477] ata1.00: error: { UNC }
Apr 12 00:06:03 Brushpass kernel: [34618.288690] ata1.00: configured for
UDMA/100
Apr 12 00:06:03 Brushpass kernel: [34618.288737] sd 0:0:0:0: [sda] tag#13
FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Apr 12 00:06:03 Brushpass kernel: [34618.288750] sd 0:0:0:0: [sda] tag#13 Sense
Key : Medium Error [current]
Apr 12 00:06:03 Brushpass kernel: [34618.288760] sd 0:0:0:0: [sda] tag#13 Add.
Sense: Unrecovered read error - auto reallocate failed
Not sure if this will help.\
-mike
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https://bugs.launchpad.net/bugs/1867916
Title:
Regression in kernel 4.15.0-91 causes kernel panic with Bcache
Status in linux package in Ubuntu:
In Progress
Bug description:
After upgrading from kernel 4.15.0-88 to 4.15.0-91 one of our systems
does not boot any longer. It always crashes during boot with a kernel
panic.
I suspect that this crash might be related to Bcache because this is
the only one of our systems where we use Bcache and the kernel panic
appears right after Bcache initialization.
I already checked that this bug still exists in the 4.15.0-92.93
kernel from proposed.
Unfortunately, I cannot do a bisect because this is a critical
production system and we do not have any other system with a similar
configuration.
I attached a screenshot with the trace of the kernel panic.
The last message that appears before the kernel panic (or rather the
last one that I can see - there is a rather long pause between that
message and the panic and I cannot scroll up far enough to ensure that
there are no other messages in between) is:
bcache: register_bcache() error /dev/dm-0: device already registered
When booting with kernel 4.15.0-88 that does not have this problem,
the next message is
bcache: register_bcache() error /dev/dm-12: device already registered
(emitting change event)
After that the next message is:
Begin: Loading essential drivers ... done
This message also appears after the kernel panic, but the boot process
stalls and the system can only be recovered by doing a hardware reset.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-88-generic 4.15.0-88.88
ProcVersionSignature: Ubuntu 4.15.0-88.88-generic 4.15.18
Uname: Linux 4.15.0-88-generic x86_64
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Mar 17 21:08 seq
crw-rw---- 1 root audio 116, 33 Mar 17 21:08 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.9-0ubuntu7.11
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord':
'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
Date: Wed Mar 18 12:55:18 2020
HibernationDevice: RESUME=UUID=40512ea2-9fce-40f5-8362-5daf955cc26a
InstallationDate: Installed on 2013-07-02 (2450 days ago)
InstallationMedia: Ubuntu-Server 12.04.2 LTS "Precise Pangolin" - Release
amd64 (20130214)
MachineType: HP ProLiant DL160 G6
PciMultimedia:
ProcFB: 0 mgadrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-88-generic
root=/dev/mapper/vg0-root ro nosmt nomdmonddf nomdmonisw nomdmonddf nomdmonisw
nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw
RelatedPackageVersions:
linux-restricted-modules-4.15.0-88-generic N/A
linux-backports-modules-4.15.0-88-generic N/A
linux-firmware 1.173.16
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: linux
UpgradeStatus: Upgraded to bionic on 2018-09-23 (541 days ago)
dmi.bios.date: 11/06/2009
dmi.bios.vendor: HP
dmi.bios.version: O33
dmi.chassis.asset.tag: 0191525
dmi.chassis.type: 23
dmi.chassis.vendor: HP
dmi.modalias:
dmi:bvnHP:bvrO33:bd11/06/2009:svnHP:pnProLiantDL160G6:pvr:cvnHP:ct23:cvr:
dmi.product.name: ProLiant DL160 G6
dmi.sys.vendor: HP
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