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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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