[PATCH RFCv2 6/6] memory-hotplug.txt: Add some details about locking internals

[Pasha Tatashin]

Reviewed-by: Pavel Tatashin <pavel.tatashin at microsoft.com>

On 8/21/18 6:44 AM, David Hildenbrand wrote:
> Let's document the magic a bit, especially why device_hotplug_lock is
> required when adding/removing memory and how it all play together with
> requests to online/offline memory from user space.
>