linux-kernel - Re: [RFC PATCH 2/2] zsmalloc: chain-length configuration should consider other metrics

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Message-ID: <53zplsrqc66z4ea64cosy53zvttuuhgxr2ik7uw6i2zgluegyz@d3ulgntwnyw4>
Date: Wed, 7 Jan 2026 14:43:42 +0900
From: Sergey Senozhatsky <senozhatsky@...omium.org>
To: Yosry Ahmed <yosry.ahmed@...ux.dev>
Cc: Herbert Xu <herbert@...dor.apana.org.au>, 
	Sergey Senozhatsky <senozhatsky@...omium.org>, Andrew Morton <akpm@...ux-foundation.org>, 
	Nhat Pham <nphamcs@...il.com>, Minchan Kim <minchan@...nel.org>, 
	Johannes Weiner <hannes@...xchg.org>, Brian Geffon <bgeffon@...gle.com>, linux-kernel@...r.kernel.org, 
	linux-mm@...ck.org
Subject: Re: [RFC PATCH 2/2] zsmalloc: chain-length configuration should
 consider other metrics

On (26/01/07 05:39), Yosry Ahmed wrote:
> > On Tue, Jan 06, 2026 at 04:24:45PM +0000, Yosry Ahmed wrote:
[..]
> > Adding native SG support to LZO simply means removing the memcpy that
> > scomp would otherwise have to do.
> 
> Yeah the effort to add native support to compressors can be done
> separately. For zswap, I think the most common compressors are
> actually zstd and LZ4.

I think it's the same for chromeos: lz4 (primary) and zstd
(secondary/recompression).  zstd looks very complicated,
not sure if we really want to diverge its codebase from
the upstream (meta github repo).