Performance degradation and eventual memory corruption if vCPU hotplug is enabled on VMware ESXi

Solution Verified - Updated -

Issue

  • VMware vm experienced memory corruption
  • vm hangs
  • broken numa layout
  • all cpus appear in node0
  • vnuma is enabled but UMA is used instead

Environment

  • VMware ESX 5.0.x / 5.1.x / 5.5.x
  • virtual NUMA and vCPU hotplug enabled
  • Red Hat Enterprise Linux

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