Kernel series peels stop_machine off CPU teardown for RT and nohz_full
Frederic Weisbecker’s 47-patch rework lets most hot-unplug steps run without freezing every CPU, clearing a path for isolated and real-time partitions.
By kexec#cpu-hotplug
Kernel series cuts CPU hotplug time 21x on large Xeon systems
Patches remove obsolete cache flushes and fix quadratic scheduler and accounting work that dominated sequential online and offline on high-core x86 servers.
By kexec