Comment # 37 on bug 1105271 from Sebastian Parschauer

(In reply to Jiri Kosina from comment #16)

Almost found. It is one of these:
>         patches.arch/01-sched-smt-update-sched_smt_present-at-runtime.patch
>         patches.arch/02-x86-smp-provide-topology_is_primary_thread.patch
>         patches.arch/03-x86-topology-provide-topology_smt_supported.patch
>         patches.arch/04-cpu-hotplug-split-do_cpu_down.patch
>         patches.arch/04.1-cpu-hotplug-add-sysfs-state-interface.patch
>         patches.arch/04.2-x86-topology-add-topology_max_smt_threads.patch        
>         patches.arch/04.3-x86-smpboot-do-not-use-smp_num_siblings-in-
> _max_logical_packages-calculation.patch
>         patches.arch/05-cpu-hotplug-provide-knobs-to-control-smt.patch