I did re-verify this now with the 4.9 mainline and kdump through NMI works fine. There might have been additional patches and there is at least one other commit in upstream, however that one is addressing only x86 arch.
Full version info: v4.9 mainline build v4.9 (69973b830859bc6529a7a0468ba0d80ee5117826) Changing tag flag kernel-fixed-upstream ** Tags added: kernel-fixed-upstream -- 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/1630924 Title: Kdump through NMI SMP and single core not working on Ubuntu16.10 Status in linux package in Ubuntu: Confirmed Status in linux source package in Yakkety: Confirmed Bug description: During some tests I've encountered an issue with kdump through NMI SMP and single core. After kdump configuration, when I trigger the crash through an NMI call from the host, the VM will panic, however it will not write the vmcore dump files and neither reboot. REPRO STEPS: 1. configure kdump - crashkernel=512M-:384M /boot/grub/grub.cfg - USE_KDUMP=1 /etc/default/kdump-tools 2. after configuration reboot the VM 3. check kdump status - cat /sys/kernel/kexec_* - service kdump-tools status 4. configure NMI - sysctl -w kernel.unknown_nmi_panic=1 5. trigger a crash from host - Debug-VM -Name $vmName -InjectNonMaskableInterrupt -ComputerName $hvServer -Force This case also applies to: -Ubuntu 16.10 generation 2(kernel version: 4.8.0-17-generic) -Ubuntu 16.04.1(kernel: 4.4.0-38-generic) -Ubuntu 14.04.5(kernel: 3.19.0-69-generic) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1630924/+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
