linux-kernel - Re: [PATCH v10 06/14] mm: multi-gen LRU: minimal implementation

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Message-ID: <CAGsJ_4ymn55eEkmSh5nBkoHcazHxuTBO6wtPJ0C+xE8WB+jqLg@mail.gmail.com>
Date:   Fri, 15 Apr 2022 22:15:50 +1200
From:   Barry Song <21cnbao@...il.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Yu Zhao <yuzhao@...gle.com>, Stephen Rothwell <sfr@...hwell.id.au>,
        Linux-MM <linux-mm@...ck.org>, Andi Kleen <ak@...ux.intel.com>,
        Aneesh Kumar <aneesh.kumar@...ux.ibm.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Hillf Danton <hdanton@...a.com>, Jens Axboe <axboe@...nel.dk>,
        Jesse Barnes <jsbarnes@...gle.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Jonathan Corbet <corbet@....net>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Matthew Wilcox <willy@...radead.org>,
        Mel Gorman <mgorman@...e.de>,
        Michael Larabel <Michael@...haellarabel.com>,
        Michal Hocko <mhocko@...nel.org>,
        Mike Rapoport <rppt@...nel.org>,
        Rik van Riel <riel@...riel.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Will Deacon <will@...nel.org>,
        Ying Huang <ying.huang@...el.com>,
        LAK <linux-arm-kernel@...ts.infradead.org>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Kernel Page Reclaim v2 <page-reclaim@...gle.com>,
        x86 <x86@...nel.org>, Brian Geffon <bgeffon@...gle.com>,
        Jan Alexander Steffens <heftig@...hlinux.org>,
        Oleksandr Natalenko <oleksandr@...alenko.name>,
        Steven Barrett <steven@...uorix.net>,
        Suleiman Souhlal <suleiman@...gle.com>,
        Daniel Byrne <djbyrne@....edu>,
        Donald Carr <d@...os-reins.com>,
        Holger Hoffstätte <holger@...lied-asynchrony.com>,
        Konstantin Kharlamov <Hi-Angel@...dex.ru>,
        Shuang Zhai <szhai2@...rochester.edu>,
        Sofia Trinh <sofia.trinh@....works>,
        Vaibhav Jain <vaibhav@...ux.ibm.com>
Subject: Re: [PATCH v10 06/14] mm: multi-gen LRU: minimal implementation

On Fri, Apr 15, 2022 at 9:40 AM Andrew Morton <akpm@...ux-foundation.org> wrote:
>
> On Thu, 14 Apr 2022 14:36:03 -0600 Yu Zhao <yuzhao@...gle.com> wrote:
>
> > > or it is only something
> > > meaningful for the internal code?
> >
> > This is how swappiness is interpreted.
> >
> > > if so, can we rename it to
> > > something else? otherwise, it is quite confusing.
> >
> > Feel free to suggest something.
>
> It is confusing,   swap_preference?

seems to be much better. might also be worth using MACRO to replace those
1, 200, 0 magic numbers  to tell readers the exact meaning?

>
>
Thanks
Barry