Re: [PATCH 04/09] memcg: make zone_reclaim_stat

KOSAKI Motohiro
2008-12-01T00:50:14Z

> 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.