"Srivatsa S. Bhat" [off-list ref] writes:

Hi,

This patchset removes CPU hotplug's dependence on stop_machine() from the CPU
offline path and provides an alternative (set of APIs) to preempt_disable() to
prevent CPUs from going offline, which can be invoked from atomic context.
The motivation behind the removal of stop_machine() is to avoid its ill-effects
and thus improve the design of CPU hotplug. (More description regarding this
is available in the patches).

If you're doing a v7, please put your benchmark results somewhere!

The obvious place is in the 44/46.

Thanks,
Rusty.