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Wed, 10 Dec 2025 05:36:27 +0000 Received: from SJ2PR11MB8472.namprd11.prod.outlook.com ([fe80::662:dcf4:b809:4860]) by SJ2PR11MB8472.namprd11.prod.outlook.com ([fe80::662:dcf4:b809:4860%5]) with mapi id 15.20.9412.005; Wed, 10 Dec 2025 05:36:26 +0000 From: "Sridhar, Kanchana P" To: Herbert Xu , Yosry Ahmed CC: SeongJae Park , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "hannes@cmpxchg.org" , "nphamcs@gmail.com" , "chengming.zhou@linux.dev" , "usamaarif642@gmail.com" , "ryan.roberts@arm.com" , "21cnbao@gmail.com" <21cnbao@gmail.com>, "ying.huang@linux.alibaba.com" , "akpm@linux-foundation.org" , "senozhatsky@chromium.org" , "kasong@tencent.com" , "linux-crypto@vger.kernel.org" , "davem@davemloft.net" , "clabbe@baylibre.com" , "ardb@kernel.org" , "ebiggers@google.com" , "surenb@google.com" , "Accardi, Kristen C" , "Gomes, Vinicius" , "Feghali, Wajdi K" , "Gopal, Vinodh" , "Sridhar, Kanchana P" Subject: RE: [PATCH v13 22/22] mm: zswap: Batched zswap_compress() with compress batching of large folios. Thread-Topic: [PATCH v13 22/22] mm: zswap: Batched zswap_compress() with compress batching of large folios. 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SJ2PR11MB8472.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: e5c3fdd8-51ce-465f-c300-08de37ae101e X-MS-Exchange-CrossTenant-originalarrivaltime: 10 Dec 2025 05:36:26.6842 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: xhrsKf0j9S6Mc3RgsZkngvvhfXHtOS/PuGwd4I0yFo8UsOECRlVj+ggaNkQtyXhePEiTd4HquOsmxvGYrhe4oOEYy5fCX6vBkGPV/0VXT30= X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV8PR11MB8697 X-OriginatorOrg: intel.com X-Rspam-User: X-Rspamd-Queue-Id: 8798D40004 X-Rspamd-Server: rspam10 X-Stat-Signature: p6dnqmbta1nyds1qma66itkr4b75skuc X-HE-Tag: 1765344998-305789 X-HE-Meta: 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 NyTgaOoX DTZVrF68UPBP+24aReCEFndRry3QaTJFBImVINg0ySbZaaSLamsya9Opwx1tTo+RxwbJk87gov3HIqVTq6YrT4nQ5UHxgtepn7I0t X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > -----Original Message----- > From: Herbert Xu > Sent: Tuesday, December 9, 2025 8:28 PM > To: Yosry Ahmed > Cc: Sridhar, Kanchana P ; SeongJae Park > ; linux-kernel@vger.kernel.org; linux-mm@kvack.org; > hannes@cmpxchg.org; nphamcs@gmail.com; chengming.zhou@linux.dev; > usamaarif642@gmail.com; ryan.roberts@arm.com; 21cnbao@gmail.com; > ying.huang@linux.alibaba.com; akpm@linux-foundation.org; > senozhatsky@chromium.org; kasong@tencent.com; linux- > crypto@vger.kernel.org; davem@davemloft.net; clabbe@baylibre.com; > ardb@kernel.org; ebiggers@google.com; surenb@google.com; Accardi, > Kristen C ; Gomes, Vinicius > ; Feghali, Wajdi K ; > Gopal, Vinodh > Subject: Re: [PATCH v13 22/22] mm: zswap: Batched zswap_compress() with > compress batching of large folios. >=20 > 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. >=20 > 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. >=20 > 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. Thanks Herbert, this sounds good. Thanks, Kanchana >=20 > Cheers, > -- > Email: Herbert Xu > Home Page: http://gondor.apana.org.au/~herbert/ > PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt