linux-kernel - RE: [PATCH v12 14/23] crypto: iaa - IAA Batching for parallel compressions/decompressions.

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Message-ID: <PH7PR11MB8121C3BAD72D03573D6B4951C9F6A@PH7PR11MB8121.namprd11.prod.outlook.com>
Date: Fri, 17 Oct 2025 04:04:56 +0000
From: "Sridhar, Kanchana P" <kanchana.p.sridhar@...el.com>
To: Herbert Xu <herbert@...dor.apana.org.au>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>, "hannes@...xchg.org"
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	"surenb@...gle.com" <surenb@...gle.com>, "Accardi, Kristen C"
	<kristen.c.accardi@...el.com>, "Gomes, Vinicius" <vinicius.gomes@...el.com>,
	"Feghali, Wajdi K" <wajdi.k.feghali@...el.com>, "Gopal, Vinodh"
	<vinodh.gopal@...el.com>, "Sridhar, Kanchana P"
	<kanchana.p.sridhar@...el.com>
Subject: RE: [PATCH v12 14/23] crypto: iaa - IAA Batching for parallel
 compressions/decompressions.


> -----Original Message-----
> From: Herbert Xu <herbert@...dor.apana.org.au>
> Sent: Thursday, October 16, 2025 6:10 PM
> To: Sridhar, Kanchana P <kanchana.p.sridhar@...el.com>
> Cc: linux-kernel@...r.kernel.org; linux-mm@...ck.org;
> hannes@...xchg.org; yosry.ahmed@...ux.dev; nphamcs@...il.com;
> chengming.zhou@...ux.dev; usamaarif642@...il.com;
> ryan.roberts@....com; 21cnbao@...il.com;
> ying.huang@...ux.alibaba.com; akpm@...ux-foundation.org;
> senozhatsky@...omium.org; sj@...nel.org; kasong@...cent.com; linux-
> crypto@...r.kernel.org; davem@...emloft.net; clabbe@...libre.com;
> ardb@...nel.org; ebiggers@...gle.com; surenb@...gle.com; Accardi,
> Kristen C <kristen.c.accardi@...el.com>; Gomes, Vinicius
> <vinicius.gomes@...el.com>; Feghali, Wajdi K <wajdi.k.feghali@...el.com>;
> Gopal, Vinodh <vinodh.gopal@...el.com>
> Subject: Re: [PATCH v12 14/23] crypto: iaa - IAA Batching for parallel
> compressions/decompressions.
> 
> On Thu, Sep 25, 2025 at 08:34:53PM -0700, Kanchana P Sridhar wrote:
> >
> > +__always_inline int iaa_comp_compress_batch(
> > +	enum iaa_mode mode,
> > +	struct iaa_req *parent_req,
> > +	unsigned int unit_size)
> > +{
> > +	return iaa_comp_acompress_batch(iaa_ctx[mode], parent_req,
> unit_size);
> > +}
> > +EXPORT_SYMBOL_GPL(iaa_comp_compress_batch);
> > +
> > +__always_inline int iaa_comp_decompress_batch(
> > +	enum iaa_mode mode,
> > +	struct iaa_req *parent_req,
> > +	unsigned int unit_size)
> > +{
> > +	return iaa_comp_adecompress_batch(iaa_ctx[mode], parent_req,
> unit_size);
> > +}
> > +EXPORT_SYMBOL_GPL(iaa_comp_decompress_batch);
> 
> What are these for?

Hi Herbert,

These are for non-crypto users such as zram. I plan to submit an RFC for
zram that enables IAA as a zcomp backend with batching support. These
API will be used for this purpose.

Thanks,
Kanchana

> 
> 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