William Grant points out:
commit 8b834bff1b73dce46f4e9f5e84af6f73fed8b0ef
Date: Tue Mar 13 17:42:39 2018 +0800
scsi: hpsa: fix selection of reply queue
Since commit 84676c1f21e8 ("genirq/affinity: assign vectors to all
possible CPUs") we could end up with an MSI-X vector that did not have
any online CPUs mapped. This would lead to I/O hangs since there was no
CPU to receive the completion.
Our 4.15 does not have that commit, but does have the referenced one.
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https://bugs.launchpad.net/bugs/1766770
Title:
4.15.0-15-generic can't find root device
Status in linux package in Ubuntu:
Confirmed
Bug description:
This is on a Hewlett-Packard ProLiant DL380 G7, with a Smart Array
P410i RAID controller containing a RAID 1+0 array of four SATA hard
drives.
It's running Ubuntu 16.04 with the linux-image-generic-hwe-16.04-edge
packages installed.
The root partition consists of a simple ext4 filesystem on /dev/sda1,
which is on the RAID array
There is a more complex secondary mount involving mdraid and bcache
intended to be mounted at /srv - but we're seeing problems before that
comes into play.
Booting into the last 4.13 kernel (4.13.0-39-generic) works fine.
Booting into the latest 4.15 kernel (4.15.0-15-generic) results in the root
device not being found, and a stacktrace before an initramfs prompt:
https://pastebin.ubuntu.com/p/JnTXQ5YP9W/
---
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Apr 25 03:37 seq
crw-rw---- 1 root audio 116, 33 Apr 25 03:37 timer
AplayDevices: Error: [Errno 2] No such file or directory
ApportVersion: 2.20.1-0ubuntu2.16
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
DistroRelease: Ubuntu 16.04
IwConfig: Error: [Errno 2] No such file or directory
MachineType: HP ProLiant DL380 G7
Package: linux (not installed)
PciMultimedia:
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-39-generic
root=UUID=dd30f756-2a4d-43e5-b49c-dfbafbceea9d ro console=ttyS1,38400 nosplash
ProcVersionSignature: Ubuntu 4.13.0-39.44~16.04.1-generic 4.13.16
RelatedPackageVersions:
linux-restricted-modules-4.13.0-39-generic N/A
linux-backports-modules-4.13.0-39-generic N/A
linux-firmware 1.157.17
RfKill: Error: [Errno 2] No such file or directory
Tags: xenial
Uname: Linux 4.13.0-39-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm
_MarkForUpload: True
dmi.bios.date: 08/16/2015
dmi.bios.vendor: HP
dmi.bios.version: P67
dmi.chassis.type: 23
dmi.chassis.vendor: HP
dmi.modalias:
dmi:bvnHP:bvrP67:bd08/16/2015:svnHP:pnProLiantDL380G7:pvr:cvnHP:ct23:cvr:
dmi.product.family: ProLiant
dmi.product.name: ProLiant DL380 G7
dmi.sys.vendor: HP
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