On Wed, May 05, 2021 at 03:12:43PM -0000, dann frazier wrote: > On ARM, accelerated guests have the host interrupt controller somewhat > "passed through". I say that while vigorously waving my hands because I > don't recall the details well - but I do know that we needed to teach > the entire stack (host kernel -> QEMU -> edk2) about GICv3 and that was > new in the xenial release. AIUI, the existing hosts in ScalingStack > would've been X-Gene w/ older GICv2m controllers. I suspect the root > cause of these issues lie somewhere in the GICv3 support in QEMU and/or > edk2 - see bug 1675522 for a similar report. I'd definitely suggest > upgrading to >= bionic if possible. Or, if not, maybe consider enabling > the cloud archive to get a newer virt stack. If neither is possible, we > could also of course try and bisect down the fixes for the xenial stack > and try and SRU them back - but that will certainly take some time. >
Thanks for the analysis and for helping to look at this, it's really appreciated. I suspect getting Scalingstack dist-upgraded to a newer release will be a difficult task... upgrading the virt stack alone *may* be possible, we can check that (the cloud archive doesn't contain edk2 though). It's also running Launchpad buildds though. I would expect reluctance to do this from their side due to the risks and, annoying as it is, think we should plan on identifying & doing the backports. Sorry :( I'll file a ticket with IS for their input... -- Iain Lane [ i...@orangesquash.org.uk ] Debian Developer [ la...@debian.org ] Ubuntu Developer [ la...@ubuntu.com ] -- 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/1926955 Title: [VMs on] arm64 eMAG system often failing to reboot with "IRQ Exception at 0x000000009BC11F38" Status in edk2 package in Ubuntu: New Status in linux package in Ubuntu: Confirmed Status in qemu package in Ubuntu: New Bug description: We recently installed some new arm64 Ampere eMAG hardware in the ScalingStack region which we use to run autopkgtests. Guests (currently impish VMs on OpenStack) which we spawn often fail to reboot, repeating this over and over: IRQ Exception at 0x000000009BC11F38 Steps to reproduce: 1. Boot a current impish daily cloud image (have not confirmed other releases) in a VM on an Ampere eMAG (have not verified bare metal). 2. Wait for it to come up, and then issue `sudo reboot` 3. If the machine comes back up again, repeat #2 a few times. This is intermittent. 3a. If it fails, take a look at "openstack console log <machine id>" for the IRQ exception which repeats indefinitely. (stand by, I will get something to attach shortly) --- ProblemType: Bug AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 May 3 12:45 seq crw-rw---- 1 root audio 116, 33 May 3 12:45 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.20.11-0ubuntu65 Architecture: arm64 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CasperMD5CheckResult: unknown DistroRelease: Ubuntu 21.10 Ec2AMI: ami-0000fd9f Ec2AMIManifest: FIXME Ec2AvailabilityZone: nova Ec2InstanceType: m1.small Ec2Kernel: unavailable Ec2Ramdisk: unavailable IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' Lspci-vt: -[0000:00]-+-00.0 Red Hat, Inc. QEMU PCIe Host bridge \-01.0-[01-02]----01.0-[02]-- Lsusb: Error: command ['lsusb'] failed with exit code 1: Lsusb-t: Lsusb-v: Error: command ['lsusb', '-v'] failed with exit code 1: MachineType: QEMU KVM Virtual Machine Package: linux (not installed) PciMultimedia: ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-16-generic root=UUID=6bd452c7-16ff-4771-b2e8-36045e00cc68 ro nohz=off ProcVersionSignature: Ubuntu 5.11.0-16.17-generic 5.11.12 RelatedPackageVersions: linux-restricted-modules-5.11.0-16-generic N/A linux-backports-modules-5.11.0-16-generic N/A linux-firmware 1.197 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' Tags: impish ec2-images Uname: Linux 5.11.0-16-generic aarch64 UnreportableReason: This report is about a package that is not installed. UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: N/A _MarkForUpload: False acpidump: dmi.bios.date: 02/06/2015 dmi.bios.release: 0.0 dmi.bios.vendor: EFI Development Kit II / OVMF dmi.bios.version: 0.0.0 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnEFIDevelopmentKitII/OVMF:bvr0.0.0:bd02/06/2015:br0.0:svnQEMU:pnKVMVirtualMachine:pvr1.0:cvnQEMU:ct1:cvr1.0: dmi.product.name: KVM Virtual Machine dmi.product.version: 1.0 dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/1926955/+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
