Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Subject: Re: [PATCH v6 5/6] mm/swap: implement workingset detection for
 anonymous LRU
To:     js1304@gmail.com, Andrew Morton <akpm@linux-foundation.org>
Cc:     linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        Johannes Weiner <hannes@cmpxchg.org>,
        Michal Hocko <mhocko@kernel.org>,
        Hugh Dickins <hughd@google.com>,
        Minchan Kim <minchan@kernel.org>,
        Mel Gorman <mgorman@techsingularity.net>, kernel-team@lge.com,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>
References: <1592371583-30672-1-git-send-email-iamjoonsoo.kim@lge.com>
 <1592371583-30672-6-git-send-email-iamjoonsoo.kim@lge.com>
From:   Vlastimil Babka <vbabka@suse.cz>
Message-ID: <47989e98-ecd2-3ea8-871c-88583e55a4dc@suse.cz>
Date:   Thu, 2 Jul 2020 15:37:32 +0200
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101
 Thunderbird/68.9.0
MIME-Version: 1.0
In-Reply-To: <1592371583-30672-6-git-send-email-iamjoonsoo.kim@lge.com>
Content-Type: text/plain; charset=utf-8
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On 6/17/20 7:26 AM, js1304@gmail.com wrote:
> From: Joonsoo Kim <iamjoonsoo.kim@lge.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@lge.com>

Acked-by: Vlastimil Babka <vbabka@suse.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) {
>