From: Johannes Weiner <hannes@cmpxchg.org>
To: js1304@gmail.com
Cc: Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Michal Hocko <mhocko@kernel.org>, Hugh Dickins <hughd@google.com>,
Minchan Kim <minchan@kernel.org>,
Vlastimil Babka <vbabka@suse.cz>,
Mel Gorman <mgorman@techsingularity.net>,
kernel-team@lge.com, Joonsoo Kim <iamjoonsoo.kim@lge.com>
Subject: Re: [PATCH v4 5/8] mm/workingset: handle the page without memcg
Date: Mon, 23 Mar 2020 12:51:11 -0400 [thread overview]
Message-ID: <20200323165111.GC204561@cmpxchg.org> (raw)
In-Reply-To: <1584942732-2184-6-git-send-email-iamjoonsoo.kim@lge.com>
On Mon, Mar 23, 2020 at 02:52:09PM +0900, js1304@gmail.com wrote:
> From: Joonsoo Kim <iamjoonsoo.kim@lge.com>
>
> When implementing workingset detection for anonymous page, I found
> some swapcache pages with NULL memcg. They are brought in by swap
> readahead and nobody has touched it.
>
> The idea behind the workingset code is to tell on page fault time
> whether pages have been previously used or not. Since this page
> hasn't been used, don't store a shadow entry for it; when it later
> faults back in, we treat it as the new page that it is.
>
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
next prev parent reply other threads:[~2020-03-23 16:51 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-23 5:52 [PATCH v4 0/8] workingset protection/detection on the anonymous LRU list js1304
2020-03-23 5:52 ` [PATCH v4 1/8] mm/vmscan: make active/inactive ratio as 1:1 for anon lru js1304
2020-03-23 5:52 ` [PATCH v4 2/8] mm/vmscan: protect the workingset on anonymous LRU js1304
2020-03-23 5:52 ` [PATCH v4 3/8] mm/workingset: extend the workingset detection for anon LRU js1304
2020-03-23 5:52 ` [PATCH v4 4/8] mm/swapcache: support to handle the exceptional entries in swapcache js1304
2020-03-23 16:50 ` Johannes Weiner
2020-03-23 5:52 ` [PATCH v4 5/8] mm/workingset: handle the page without memcg js1304
2020-03-23 16:51 ` Johannes Weiner [this message]
2020-03-23 5:52 ` [PATCH v4 6/8] mm/swap: implement workingset detection for anonymous LRU js1304
2020-03-23 17:17 ` Johannes Weiner
2020-03-24 6:25 ` Joonsoo Kim
2020-04-02 5:50 ` Joonsoo Kim
2020-04-02 15:14 ` Johannes Weiner
2020-03-23 5:52 ` [PATCH v4 7/8] mm/vmscan: restore active/inactive ratio " js1304
2020-03-23 17:18 ` Johannes Weiner
2020-03-23 5:52 ` [PATCH v4 8/8] mm/swap: count a new anonymous page as a reclaim_state's rotate js1304
2020-03-23 17:42 ` Johannes Weiner
2020-03-24 6:28 ` Joonsoo Kim
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