This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1656033

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1656033

Title:
  Yakkety Server cannot handle more than 256 cores

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Generic Linux kernel flavor is official Ubuntu Server Linux kernel flavor.
  It is supposed to be run on both workstations and servers.

  Generic kernel configuration supports max 256 CPUs:

      root@ubuntu02:~# grep CONFIG_NR_CPUS /boot/config-$(uname -r)
      CONFIG_NR_CPUS=256

  While running on Intel KNL with Hyper-Threading enabled it cannot
  accommodate cores over 256.

  Probably server flavor should support 512 cores, like it is in RedHat.

  Logs attached.

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