Verified the following proposed kernels and confirm this as fixed in:
On Gen1VM: 16.04.1 with 4.4.0-63.67
On both Gen1 and Gen2VM: 16.10 with 4.8.0-38.49

Thank you!

** Tags removed: verification-needed-xenial verification-needed-yakkety
** Tags added: verification-done-xenial verification-done-yakkety

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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:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Xenial:
  Fix Committed
Status in linux source package in Yakkety:
  Fix Committed
Status in linux source package in Zesty:
  In Progress

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)

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