Re: [PATCH v5 4/4] mm: Defer ZONE_DEVICE page initialization to the point where we init pgmap

[Michal Hocko]

On Wed 26-09-18 11:52:56, Dan Williams wrote:
[...]
> Could we push the hotplug lock deeper to the places that actually need
> it? What I found with my initial investigation is that we don't even
> need the hotplug lock for the vmemmap initialization with this patch
> [1].

Yes, the scope of the hotplug lock should be evaluated and _documented_.
Then we can build on top.
-- 
Michal Hocko
SUSE Labs