linux-kernel - Re: [PATCH v13 22/22] mm: zswap: Batched zswap_compress() with compress batching of large folios.

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Message-ID: <aTj22_idykAfpDNw@gondor.apana.org.au>
Date: Wed, 10 Dec 2025 12:28:11 +0800
From: Herbert Xu <herbert@...dor.apana.org.au>
To: Yosry Ahmed <yosry.ahmed@...ux.dev>
Cc: "Sridhar, Kanchana P" <kanchana.p.sridhar@...el.com>,
	SeongJae Park <sj@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"hannes@...xchg.org" <hannes@...xchg.org>,
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	"Gopal, Vinodh" <vinodh.gopal@...el.com>
Subject: Re: [PATCH v13 22/22] mm: zswap: Batched zswap_compress() with
 compress batching of large folios.

On Tue, Dec 09, 2025 at 05:31:35PM +0000, Yosry Ahmed wrote:
>
> Ugh, yes.. I don't think we want to burn 7 extra pages per-CPU for SW
> compressors.

OK so the consensus is that we're keeping the visible batch size
attribute for now, which will be set to 1 for everything but iaa.

So for now I'm going to just provide a trivial acomp fallback so
that non-batching algorithms conform to the batching calling
convention for a batch size of 1.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt