From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 41BE0606B2E9 for ; Tue, 10 Nov 2026 13:06:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=U6Qgm6Zg Received: by kanga.kvack.org (Postfix) id 5D0D16B05E0; Tue, 10 Nov 2026 08:06:37 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 57A626B05E1; Tue, 10 Nov 2026 08:06:37 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 4697C6B05E2; Tue, 10 Nov 2026 08:06:37 -0500 (EST) 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 1A6C96B05E0 for ; Tue, 10 Nov 2026 08:06:37 -0500 (EST) Received: from smtpin12.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay04.hostedemail.com (Postfix) with ESMTP id ACD521A019E for ; Tue, 10 Nov 2026 13:06:36 +0000 (UTC) X-FDA: 85419233592.12.2B1640F Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf26.hostedemail.com (Postfix) with ESMTP id D9EA7140003 for ; Tue, 10 Nov 2026 13:06:34 +0000 (UTC) Authentication-Results: imf26.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=U6Qgm6Zg; spf=pass (imf26.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1794315995; 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:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=TolNyDhrdN2HSm/G0psLOeOyGTSERcb3rDpVQV092Rg=; b=KhL8riKsoADZMzlAUgnu0tXXJE5g/y3+L+YWpw594inec9Qk0ZX9/jyq+k6mlFE9ksB5T8 l/zzCz/ms+ib6pl468H6n772puEd4UvcVtU/tF+51Z8kZBN6J5HVcLbW74DpX2hxKhsWGV WB7+xyMYx7cxMF9LpkbBExnaiAxzuKI= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1794315995; b=NTqWfu8ygHN8+mh0gnyLsT9i+5QBwVGI5P7rXisGkwcYipi5lHVCRBoB2cfQ+xY3RJDMXW r1cTH0iAd0OKoHzfUvD3fSjmyl2oVcpASU2KQxlX0jQEii79nZca0EK2lgx6t0ja/lA1EA U5rvzqdRwq9nDaD34l4u7UAyIZKPeNE= ARC-Authentication-Results: i=1; imf26.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=U6Qgm6Zg; spf=pass (imf26.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 11D3B471BF; Tue, 10 Nov 2026 13:06:34 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 669C91F008BC; Tue, 10 Nov 2026 13:06:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794315993; bh=TolNyDhrdN2HSm/G0psLOeOyGTSERcb3rDpVQV092Rg=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=U6Qgm6ZgqMvD0OvAuYw9d6FLDoQwiyZQGJbdR0yVWPeYtHcLytJsVvjLgMVY/sMbg 0M5MRkowIO8ssPRC6p2Qmpef23bMv4cxXgiIIRbQIMyxXube2pMdi/0Sf0N4JSkTxh +kasDrmI7MvnOnF8/WrFFn1H55lmSWxwb07HqbMln+brD4f+2pP5FMXymMRCG84B2P SKbKgpogUok58cPpqapFPkXRLMiGQtXPxlJhT5aPz/lKEIbNk+5/L6Iz5Z3DRqbEKg 86rOA2H/TYVsQ5erFwIP01rNsDo3nTGBdMyPAVoAcNcyhp3fHy9m3ZipzMybGAZNBA /hceDbuVlAogg== Message-ID: <315c0415-0271-4f16-9986-cd5363159f44@kernel.org> Date: Tue, 10 Nov 2026 14:02:45 +0100 X-Archived-By: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 4/6] mm: internal: introduce FPB_LOCKLESS for folio_pte_batch_flags() To: Yeoreum Yun , linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Jason Gunthorpe , John Hubbard , Peter Xu , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Andrew Morton , Rik van Riel , Yuan-Hao Hsu References: <20261109-refactor_gup_fast-v3-0-2aaef02df0e1@arm.com> <20261109-refactor_gup_fast-v3-4-2aaef02df0e1@arm.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20261109-refactor_gup_fast-v3-4-2aaef02df0e1@arm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Stat-Signature: 7zwu9hfrpmbrt5jq46mx6ew81wmr1tnr X-Rspamd-Queue-Id: D9EA7140003 X-Rspam-User: X-Rspamd-Server: rspam08 X-Spam-Status: No, score=-12.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_PASS,SPF_PASS, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=4.0.1 X-HE-Tag: 1794315994-664151 X-HE-Meta: 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 S9OTQuwh DCQJftRYXCs4WM4NFikEqkiQ8bX0rcesrnh2xDu8vIGC6hrzoP/VHOqBvTRigaicDNk158MIsQeaTqBmr1i5Fi8gAZPQlP04s7pIXoR/d0VeaYiH6gUhCzEL4NJOfzD506d3fdqVRwQcrQ4t7X5m2bI3M33X4XmijnyYQGFSpmF8Tf+rOahaQL2rrhPcb7n+a7ESR7hQrd1wXVTLG+WUycPVt5mqs4JI/RQhJ6M4RNqH3s7cUsQO2wtAKAVdCOwOk8eVdvU5odCIuME3+iNfJvonG7eTDFqndYnhzSn/dpGK45aZ3IJp6K+TcK9uUy5C2QNLZePlGW9bEQz8odyOKdHjNeM+Ku4gGNUkTYAX1ZZUrMirdOfeMxiHRsAx/jd35hsjOZ/YJLqAkepvvGn/JT3NIKGKPmm3/uq9J Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On 11/9/26 13:32, Yeoreum Yun wrote: > From: Yuan-Hao Hsu > > Add support for calling folio_pte_batch_flags() in GUP-fast context when we are > not holding the PT lock. Instead of reading PTEs through ptep_get(), we have to > use ptep_get_lockless(). > > Specify the new behavior through a new flag FPB_LOCKLESS. We'll make use of this > functionality for batching PTEs in gup_fast_pte_range() next. > > Acked-by: David Hildenbrand (Arm) > Signed-off-by: Yuan-Hao Hsu > Signed-off-by: Yeoreum Yun > --- Reviewed-by: David Hildenbrand (Arm) -- Cheers, David