Re: [PATCH v2 2/4] mm: Convert zone->managed_pages to atomic variable

[Vlastimil Babka]

On 11/6/18 5:21 PM, Arun KS wrote:
> totalram_pages, zone->managed_pages and totalhigh_pages updates
> are protected by managed_page_count_lock, but readers never care
> about it. Convert these variables to atomic to avoid readers
> potentially seeing a store tear.
> 
> This patch converts zone->managed_pages. Subsequent patches will
> convert totalram_panges, totalhigh_pages and eventually
> managed_page_count_lock will be removed.
> 
> Suggested-by: Michal Hocko <mhocko@xxxxxxxx>
> Suggested-by: Vlastimil Babka <vbabka@xxxxxxx>
> Signed-off-by: Arun KS <arunks@xxxxxxxxxxxxxx>
> Reviewed-by: Konstantin Khlebnikov <khlebnikov@xxxxxxxxxxxxxx>
> Acked-by: Michal Hocko <mhocko@xxxxxxxx>

Acked-by: Vlastimil Babka <vbabka@xxxxxxx>