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

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Message-ID: <ysfladvqa2hkprl7teggrxbr2gzxvvt3sfdpey5jz4wfrxdcrh@gznyrek6pzgt>
Date: Wed, 10 Dec 2025 15:53:44 +0000
From: Yosry Ahmed <yosry.ahmed@...ux.dev>
To: Herbert Xu <herbert@...dor.apana.org.au>
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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	"Gomes, Vinicius" <vinicius.gomes@...el.com>, "Feghali, Wajdi K" <wajdi.k.feghali@...el.com>, 
	"Gopal, Vinodh" <vinodh.gopal@...el.com>
Subject: Re: [PATCH v13 22/22] mm: zswap: Batched zswap_compress() with
 compress batching of large folios.

On Wed, Dec 10, 2025 at 12:28:11PM +0800, Herbert Xu wrote:
> 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.

Thank you!

> 
> 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