linux-kernel - Re: [PATCH 0/6] zsmalloc/zram: configurable zspage size

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Message-ID: <Y1dXSeqwX/WfUcjt@debian.me>
Date:   Tue, 25 Oct 2022 10:26:01 +0700
From:   Bagas Sanjaya <bagasdotme@...il.com>
To:     Sergey Senozhatsky <senozhatsky@...omium.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Minchan Kim <minchan@...nel.org>,
        Nitin Gupta <ngupta@...are.org>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH 0/6] zsmalloc/zram: configurable zspage size

On Tue, Oct 25, 2022 at 01:12:07AM +0900, Sergey Senozhatsky wrote:
> 	Hello,
> 
> 	Some use-cases and/or data patterns may benefit from
> larger zspages. Currently the limit on the number of physical
> pages that are linked into a zspage is hardcoded to 4. Higher
> limit changes key characteristics of a number of the size
> clases, improving compactness of the pool and redusing the
> amount of memory zsmalloc pool uses.
> 
> For instance, the huge size class watermark is currently set
> to 3264 bytes. With order 3 zspages we have more normal classe
> and huge size watermark becomes 3632. With order 4 zspages
> huge size watermark becomes 3840.
> 
> Commit #1 has more numbers and some analysis.
> 
> Sergey Senozhatsky (6):
>   zsmalloc: turn zspage order into runtime variable
>   zsmalloc/zram: pass zspage order to zs_create_pool()
>   zram: add pool_page_order device attribute
>   Documentation: document zram pool_page_order attribute
>   zsmalloc: break out of loop when found perfect zspage order
>   zsmalloc: make sure we select best zspage size
> 
>  Documentation/admin-guide/blockdev/zram.rst | 31 +++++--
>  drivers/block/zram/zram_drv.c               | 44 ++++++++-
>  drivers/block/zram/zram_drv.h               |  2 +
>  include/linux/zsmalloc.h                    | 15 +++-
>  mm/zsmalloc.c                               | 98 +++++++++++++--------
>  5 files changed, 145 insertions(+), 45 deletions(-)
> 

Sorry, I can't cleanly apply this patch series due to conflicts in
patch [1/6]. On what tree and commit the series is based?

-- 
An old man doll... just what I always wanted! - Clara

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