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Linux Hotplug a CPU and Disable CPU Cores At Run Time

I would like to dynamically enable or disable a CPU on a running system. How do I hotplug a CPU on a running Linux system? How do I disable cpu cores on a Linux operating system at run time? There are couple OEMS that support NUMA hardware which are hot pluggable as well, where physical node insertion and removal require support for CPU hotplug. This tutorial will explain how to hotplug a cpu and disable/enable core on a Linux.