linux-kernel - Re: [PATCH v2] mm: mglru: provide a separate list for lazyfree anon folios

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Message-ID: <CAGsJ_4xYqSSUE_zq+2UWLT7UsF_ovH=+QE_va+_dcMq4fnz0rg@mail.gmail.com>
Date: Thu, 17 Oct 2024 18:59:09 +1300
From: Barry Song <21cnbao@...il.com>
To: Andrew Morton <akpm@...ux-foundation.org>, minchan@...nel.org, yuzhao@...gle.com
Cc: linux-mm@...ck.org, david@...hat.com, fengbaopeng@...or.com, 
	gaoxu2@...or.com, hailong.liu@...o.com, kaleshsingh@...gle.com, 
	linux-kernel@...r.kernel.org, lokeshgidra@...gle.com, mhocko@...e.com, 
	ngeoffray@...gle.com, shli@...com, surenb@...gle.com, v-songbaohua@...o.com, 
	yipengxiang@...or.com, Gao Xu <gaoxu2@...onor.com>
Subject: Re: [PATCH v2] mm: mglru: provide a separate list for lazyfree anon folios

On Thu, Oct 17, 2024 at 11:58 AM Andrew Morton
<akpm@...ux-foundation.org> wrote:
>
> On Wed, 16 Oct 2024 16:30:30 +1300 Barry Song <21cnbao@...il.com> wrote:
>
> > To address this, this patch proposes maintaining a separate list
> > for lazyfree anon folios while keeping them classified under the
> > "file" LRU type to minimize code changes.
>
> Thanks.  I'll await input from other MGLRU developers before adding
> this for testing.

Thanks!

Hi Minchan, Yu,

Any comments? I understand that Minchan may have a broader plan
to "enable the system to maintain a quickly reclaimable memory
pool and provide a knob for admins to control its size." While I
have no objection to that plan, I believe improving MADV_FREE
performance is a more urgent priority and a low-hanging fruit at this
stage.

Thanks
Barry