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

[Rik van Riel]

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?

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