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SubjectRe: [PATCH 04/09] memcg: make zone_reclaim_stat
Date
> KOSAKI Motohiro wrote:
>
> > @@ -172,6 +173,10 @@ void activate_page(struct page *page)
> >
> > reclaim_stat->recent_rotated[!!file]++;
> > reclaim_stat->recent_scanned[!!file]++;
> > +
> > + memcg_reclaim_stat = mem_cgroup_get_reclaim_stat_by_page(page);
> > + memcg_reclaim_stat->recent_rotated[!!file]++;
> > + memcg_reclaim_stat->recent_scanned[!!file]++;
>
> Also, manipulation of the zone based reclaim_stats happens
> under the lru lock.
>
> What protects the memcg reclaim stat?

memcg zone and memcg zone_reclaim_stat also use zone->lru_lock.






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