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[youshotwhointhatwhatnow <moloney.brendan@xxxxxxxxx>]

This appears to be hardware/firmware related (specifically a problem
with the motherboard).  There is some sort of IRQ conflict when one of
the PCIe slots is being used.  The IRQ conflict was there in 14.04 as
well, but didn't seem to cause any problems.  Moving one of the NVME
devices to a different PCIe slot solved the IRQ conflict and all of the
resulting issues.

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https://bugs.launchpad.net/bugs/1573888

Title:
  Kernel errors with NVME devices

Status in linux package in Ubuntu:
  Invalid

Bug description:
  I have several identical servers with two PCIe NVME drives each (Intel
  P3600). These servers have been running 14.04 without issues.

  When trying to install 16.04 only one NVME device was visible and the
  installer would freeze up. I booted a live USB (ubuntu-mate 16.04) and
  found the syslog was getting spammed with an infinite loop  of kernel
  oops messages. I attached a trimmed version of that log. Sometimes the
  sysem would hit a kernel panic and freeze, but I don't have a setup to
  capture that currently.

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