Re: [PATCH] mm, memory_hotplug: check zone_movable in has_unmovable_pages

[osalvador]

On Wed, 2018-11-07 at 08:35 +0100, Michal Hocko wrote:
> On Wed 07-11-18 07:35:18, Balbir Singh wrote:
> > The check seems to be quite aggressive and in a loop that iterates
> > pages, but has nothing to do with the page, did you mean to make
> > the check
> > 
> > zone_idx(page_zone(page)) == ZONE_MOVABLE
> 
> Does it make any difference? Can we actually encounter a page from a
> different zone here?

AFAIK, test_pages_in_a_zone() called from offline_pages() should ensure
that the range belongs to a unique zone, so we should not encounter
pages from other zones there, right?

---
Oscar
Suse L3