From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C55AEC55ABA for ; Wed, 5 Aug 2026 14:15:00 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D3BCA6B0096; Wed, 5 Aug 2026 10:14:59 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id CEA316B0099; Wed, 5 Aug 2026 10:14:59 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id BB98E6B009B; Wed, 5 Aug 2026 10:14:59 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 92BA46B0096 for ; Wed, 5 Aug 2026 10:14:59 -0400 (EDT) Received: from smtpin20.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 23C90404C1 for ; Wed, 5 Aug 2026 14:14:59 +0000 (UTC) X-FDA: 85067412318.20.A577143 Received: from out30-131.freemail.mail.aliyun.com (out30-131.freemail.mail.aliyun.com [115.124.30.131]) by imf31.hostedemail.com (Postfix) with ESMTP id EAC5520009 for ; Wed, 5 Aug 2026 14:14:54 +0000 (UTC) Authentication-Results: imf31.hostedemail.com; dkim=pass header.d=linux.alibaba.com header.s=default header.b=itSTciAc; dmarc=pass (policy=none) header.from=linux.alibaba.com; spf=pass (imf31.hostedemail.com: domain of ying.huang@linux.alibaba.com designates 115.124.30.131 as permitted sender) smtp.mailfrom=ying.huang@linux.alibaba.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1785939296; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=0SLaqhckWEc3QyNtTsd3YEo6O8h5dl7e0vqZloeFzhQ=; b=KhJjFO3CMfV6bPLf725YprR5mclqGmZ8zu2HyVtSR4x1aIvPRYySi+e6+NyM+nB0H8mrC+ uKr+f9oiE3+OoImTwIR0gftJlfAoUdxm+n8MWrtFLMRaw82VmDb4zzDre+ZgRcFlgiRxZG GxPfUjL4qL0U+JAaM2wNqrKrNvnVA5k= ARC-Authentication-Results: i=1; imf31.hostedemail.com; dkim=pass header.d=linux.alibaba.com header.s=default header.b=itSTciAc; dmarc=pass (policy=none) header.from=linux.alibaba.com; spf=pass (imf31.hostedemail.com: domain of ying.huang@linux.alibaba.com designates 115.124.30.131 as permitted sender) smtp.mailfrom=ying.huang@linux.alibaba.com ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1785939296; b=iNHSEf9RBkRHg02pemCblE2dycZ3rZQ3RIVd8HkahIaNfA/UuadLGoH2E1RFxNNAM0cp3A GknruIWpP6CNO2iwXE8Om+eWuRmFX9Y7SE8Rj1Kl49y1lLSKtLgZxFhe4iybtNeX8SkXyG RzZ/JiYczlvLW6qB7/u7FxpYOpN9/Hk= DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1785939291; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; bh=0SLaqhckWEc3QyNtTsd3YEo6O8h5dl7e0vqZloeFzhQ=; b=itSTciAcDLaY2UXYSLQxo9KWBRJIx9RB4MBqkcUXbgS48r+BuWL3A3LgxsoCnT9O1N3mLNGC7ni/N72EbUt59vHshMCs8+XVex66OyPy9ek6lVq3GMsPxQ7xzMp6Tv3YiT4FvlXaPeKp82NnCBTsZMK1kFFH1l+7maX53VFLR1A= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R151e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033045098064;MF=ying.huang@linux.alibaba.com;NM=1;PH=DS;RN=48;SR=0;TI=SMTPD_---0X8RNYkg_1785939272; Received: from DESKTOP-5N7EMDA(mailfrom:ying.huang@linux.alibaba.com fp:SMTPD_---0X8RNYkg_1785939272 cluster:ay36) by smtp.aliyun-inc.com; Wed, 05 Aug 2026 22:14:48 +0800 From: "Huang, Ying" To: Yiannis Nikolakopoulos Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Trond Myklebust , Anna Schumaker , Zi Yan , Matthew Brost , Joshua Hahn , Rakie Kim , Byungchul Park , Gregory Price , Alistair Popple , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Brendan Jackman , Johannes Weiner , David Rientjes , Davidlohr Bueso , Fan Ni , Frank van der Linden , Jonathan Cameron , Raghavendra K T , "Rao, Bharata Bhasker" , SeongJae Park , Wei Xu , Xuezheng Chu , Yiannis Nikolakopoulos , dimitrios@palyvos.net, Ryan Roberts , Huan Nguyen , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-nfs@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Alirad Malek Subject: Re: [PATCH RFC v2 2/3] mm: new migrate_mode flag for async using non-temporal stores In-Reply-To: <20260730-rfc-nt-demote-v2-2-452dbe3b5073@zptcorp.com> (Yiannis Nikolakopoulos's message of "Thu, 30 Jul 2026 17:02:58 +0200") References: <20260730-rfc-nt-demote-v2-0-452dbe3b5073@zptcorp.com> <20260730-rfc-nt-demote-v2-2-452dbe3b5073@zptcorp.com> Date: Wed, 05 Aug 2026 22:14:31 +0800 Message-ID: <87h5l88xiw.fsf@DESKTOP-5N7EMDA> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain; charset=ascii X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: EAC5520009 X-Stat-Signature: 5kgiba3zy7gk46qgdodp9z1ceq6at43q X-Rspam-User: X-HE-Tag: 1785939294-517803 X-HE-Meta: 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 5SznKP15 McFHyc5QKs3/BVYIbhht/muwgZzPMNO+XHqc02WUsQGMoSwxsF98rHe3TUlo60xzMkIf280C1Ab4G/aEdc1z5QGu8j2AQtbgfHtA1KNxE9EakGX7kRmDhWr/TyawmlgXMJO3PK5I8kQNKanggqBREpfG9IvAJZ+25OFJlaQoHzSoeU1TABvgAfHG9HcotCFFjpWaCYHYTk1o+T3XVprwCjqfKhJhL09tl2vSxv5Mzpd7hsHMXNX7bVdNyKOlqdrSMHVU50eeYm72Qs+SljgS2vdsUKAbpuupwpcYdncOzvhIKomYbLyqlu8rzbfspVc3IBu0RjPLnRcponxw5gZyZGdZ5GKGHtWEz8We00FATUj0EohGOTV5lcXTbBVY/ys4t19jah9UwBfkSXVoOskatv4LZHd4aye+s3KKGpQ5S8gdOPPk= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Yiannis Nikolakopoulos writes: [snip] > diff --git a/include/linux/migrate_mode.h b/include/linux/migrate_mode.h > index 265c4328b36a..f7186e705b48 100644 > --- a/include/linux/migrate_mode.h > +++ b/include/linux/migrate_mode.h > @@ -3,6 +3,8 @@ > #define MIGRATE_MODE_H_INCLUDED > /* > * MIGRATE_ASYNC means never block > + * MIGRATE_ASYNC_NON_TEMPORAL_STORES means never block and use non-temporal > + * stores if supported by the architecture > * MIGRATE_SYNC_LIGHT in the current implementation means to allow blocking > * on most operations but not ->writepage as the potential stall time > * is too significant > @@ -10,10 +12,17 @@ > */ > enum migrate_mode { > MIGRATE_ASYNC, > + MIGRATE_ASYNC_NON_TEMPORAL_STORES, > MIGRATE_SYNC_LIGHT, > MIGRATE_SYNC, > }; Is it better to turn migrate_mode parameter into migrate_flags? --- Best Regards, Huang, Ying