linux-kernel - Re: [PATCH v6 5/6] mm/swap: implement workingset detection for anonymous LRU

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Date:   Thu, 2 Jul 2020 15:37:32 +0200
From:   Vlastimil Babka <vbabka@...e.cz>
To:     js1304@...il.com, Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Hugh Dickins <hughd@...gle.com>,
        Minchan Kim <minchan@...nel.org>,
        Mel Gorman <mgorman@...hsingularity.net>, kernel-team@....com,
        Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: Re: [PATCH v6 5/6] mm/swap: implement workingset detection for
 anonymous LRU

On 6/17/20 7:26 AM, js1304@...il.com wrote:
> From: Joonsoo Kim <iamjoonsoo.kim@....com>
> 
> This patch implements workingset detection for anonymous LRU.
> All the infrastructure is implemented by the previous patches so this patch
> just activates the workingset detection by installing/retrieving
> the shadow entry.
> 
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>

Acked-by: Vlastimil Babka <vbabka@...e.cz>

> diff --git a/mm/workingset.c b/mm/workingset.c
> index 8395e60..3769ae6 100644
> --- a/mm/workingset.c
> +++ b/mm/workingset.c
> @@ -353,8 +353,9 @@ void workingset_refault(struct page *page, void *shadow)
>  	/*
>  	 * Compare the distance to the existing workingset size. We
>  	 * don't activate pages that couldn't stay resident even if
> -	 * all the memory was available to the page cache. Whether
> -	 * cache can compete with anon or not depends on having swap.
> +	 * all the memory was available to the workingset. Whether
> +	 * workingset competetion need to consider anon or not depends

                      competition needs

> +	 * on having swap.
>  	 */
>  	workingset_size = lruvec_page_state(eviction_lruvec, NR_ACTIVE_FILE);
>  	if (mem_cgroup_get_nr_swap_pages(memcg) > 0) {
>