From: Andrew Morton <akpm@linux-foundation.org>
To: Joonsoo Kim <js1304@gmail.com>
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>,
Vlastimil Babka <vbabka@suse.cz>,
Mel Gorman <mgorman@techsingularity.net>,
kernel-team@lge.com
Subject: Re: [PATCH v2 0/9] workingset protection/detection on the anonymous LRU list
Date: Sat, 29 Feb 2020 20:40:00 -0800 [thread overview]
Message-ID: <20200229204000.298de32521885b8af858a50d@linux-foundation.org> (raw)
In-Reply-To: <20200227074748.GA18113@js1304-desktop>
On Thu, 27 Feb 2020 16:48:47 +0900 Joonsoo Kim <js1304@gmail.com> wrote:
> Hello, Andrew.
>
> > > * SOLUTION
> > > Since this is what we want to avoid, this patchset implements workingset
> > > protection. Like as the file LRU list, newly created or swap-in anonymous
> > > page is started on the inactive list. Also, like as the file LRU list,
> > > if enough reference happens, the page will be promoted. This simple
> > > modification changes the above example as following.
> >
> > One wonders why on earth we weren't doing these things in the first
> > place?
>
> I don't know. I tried to find the origin of this behaviour and found
> that it's from you 18 years ago. :)
>
> It mentions that starting pages on the active list boosts throughput on
> stupid swapstormy test but I cannot guess the exact reason of such
> improvement.
>
> Anyway, Following is the related patch history. Could you remember
> anything about it?
>
erm, yes, that was a long time ago ;) I guess enough other things have
changed since then to necessitate a revisit!
next prev parent reply other threads:[~2020-03-01 4:40 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-20 5:11 js1304
2020-02-20 5:11 ` [PATCH v2 1/9] mm/vmscan: make active/inactive ratio as 1:1 for anon lru js1304
2020-03-12 14:47 ` Johannes Weiner
2020-03-13 5:48 ` Joonsoo Kim
2020-02-20 5:11 ` [PATCH v2 2/9] mm/vmscan: protect the workingset on anonymous LRU js1304
2020-03-12 15:14 ` Johannes Weiner
2020-03-13 7:40 ` Joonsoo Kim
2020-03-13 19:55 ` Johannes Weiner
2020-03-16 7:05 ` Joonsoo Kim
2020-03-16 16:12 ` Johannes Weiner
2020-03-17 4:52 ` Joonsoo Kim
2020-02-20 5:11 ` [PATCH v2 3/9] mm/workingset: extend the workingset detection for anon LRU js1304
2020-02-20 5:11 ` [PATCH v2 4/9] mm/swapcache: support to handle the value in swapcache js1304
2020-02-20 5:11 ` [PATCH v2 5/9] mm/workingset: use the node counter if memcg is the root memcg js1304
2020-02-20 5:11 ` [PATCH v2 6/9] mm/workingset: handle the page without memcg js1304
2020-02-20 5:11 ` [PATCH v2 7/9] mm/swap: implement workingset detection for anonymous LRU js1304
2020-02-20 5:11 ` [PATCH v2 8/9] mm/vmscan: restore active/inactive ratio " js1304
2020-02-20 5:11 ` [PATCH v2 9/9] mm/swap: count a new anonymous page as a reclaim_state's rotate js1304
2020-02-27 3:39 ` [PATCH v2 0/9] workingset protection/detection on the anonymous LRU list Andrew Morton
2020-02-27 7:48 ` Joonsoo Kim
2020-03-01 4:40 ` Andrew Morton [this message]
2020-02-27 13:48 ` Johannes Weiner
2020-02-27 23:36 ` Andrew Morton
2020-03-02 23:31 ` Joonsoo Kim
2020-03-11 7:27 ` Joonsoo Kim
2020-02-28 3:23 ` Aaron Lu
2020-02-28 4:03 ` Joonsoo Kim
2020-02-28 5:57 ` Aaron Lu
2020-02-28 6:52 ` Joonsoo Kim
2020-02-28 9:17 ` Aaron Lu
2020-02-28 9:56 ` Joonsoo Kim
2020-02-28 10:21 ` Aaron Lu
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