------- Comment From lagar...@br.ibm.com 2017-08-10 09:35 EDT-------
>From Nitesh:

-----------------------------

The following commit resolves the issue:

commit 77cb01bc0fec4d0da02e1d4df75d28870b0ef926
Author: Peter Krempa <pkre...@redhat.com>
Date:   Tue Sep 13 15:55:06 2016 +0200

numa: Rename virNumaGetHostNodeset and make it return only nodes with memory
Name it virNumaGetHostMemoryNodeset and return only NUMA nodes which
have memory installed. This is necessary as the kernel is not very happy
to set the memory cgroup setting for nodes which do not have any memory.
This would break vcpu hotplug with following message on such
configruation:
Invalid value '0,8' for 'cpuset.mems': Invalid argument
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1375268

** Bug watch added: Red Hat Bugzilla #1375268
   https://bugzilla.redhat.com/show_bug.cgi?id=1375268

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https://bugs.launchpad.net/bugs/1709877

Title:
  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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