There is some noise when applying this to Xenial.
Nothing too big, but I think at least
commit 5555dc0d7fe0267e2ff6e5a9625164f2896f9cc5 (HEAD)
Author: Peter Krempa <>
Date:   Tue Sep 13 14:28:33 2016 +0200

    util: numa: Remove impossible error handling

Would be needed to apply better, yet OTOH the code back in Xenial might
not fulfill this condition.

Not rocket science but I see some work and regression potential which means for 
the SRU I'd like to have a really good case.
In that sense I wonder how "real" or "artificial" a system with an empty numa 
node is.
Is that a thing that really exists outside of a lab?
If so great - lets work on the SRU and please help me to add a SRU Template 
with your arguments to make a case for it convincing the SRU Team.

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  CPU hotplug fails in the system with empty numa nodes, "Invalid value
  '0-1,16-17' for 'cpuset.mems': Invalid argument"

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