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. -- 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/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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1766770/+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