Re: [PATCH v2 07/10] mm/memory_hotplug: simplify page onlining

[Oscar Salvador]

On Wed, Aug 19, 2020 at 07:59:54PM +0200, David Hildenbrand wrote:
> We don't allow to offline memory with holes, all boot memory is online,
> and all hotplugged memory cannot have holes.
> 
> We can now simplify onlining of pages. As we only allow to online/offline
> full sections and sections always span full MAX_ORDER_NR_PAGES, we can just
> process MAX_ORDER - 1 pages without further special handling.
> 
> The number of onlined pages simply corresponds to the number of pages we
> were requested to online.
> 
> While at it, refine the comment regarding the callback not exposing all
> pages to the buddy.
> 
> Acked-by: Michal Hocko <mhocko@xxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Michal Hocko <mhocko@xxxxxxxx>
> Cc: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx>
> Cc: Baoquan He <bhe@xxxxxxxxxx>
> Cc: Pankaj Gupta <pankaj.gupta.linux@xxxxxxxxx>
> Cc: Oscar Salvador <osalvador@xxxxxxx>
> Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>

Reviewed-by: Oscar Salvador <osalvador@xxxxxxx>

-- 
Oscar Salvador
SUSE L3