From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794231673; b=XQW/mmxFhMIXJ3PmOELZboxk5PW1Zu1jOxU560L0jvSD2kHI6W3v9tdQHc4PIvZP2Rs3 xjMnk5GcyvI/qUJV2NKrlCHcC+SUQAfUWM3OhCbCRc7cXY0H9/3hRVoTiaFF7rTYtiW2S WT7PctUGRJDdxBpld7uwyQdOpl4WDR/bvBw+Sso9ZSsUHqA5n0PNWv3sdFrlSBYXutrVm MG4R731TQY3cKi73kcrvV2W8yQDUDbKmxh4990hCD0sOuHaj3x/odDFgTvb2OCouHdR25 e5nVR9/Zk1S6X8d2Dw60TwE2mUUTI5vkC/oOY6Xm5xbEGcR8b0rCI2DWsulseiU6zGA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794231673; h=Received:DKIM-Signature:Message-ID:Date:MIME-Version:User-Agent: Subject:To:Cc:References:From:Content-Language:Autocrypt:In-Reply-To: Content-Type:Content-Transfer-Encoding; bh=vXnN4wP7YrRqcl/kzLqC3ibVyCYH5Vwpm+s2u3nE+fM=; b=neoO1VdL3Su1/IYhm8sv+3FjnPfSxvbjEoHt0u4Ma9176SXZdI0v2FgOqAMVe90vR5SN D8VtNzciLOUAZwv09UevSHK/8twW6EzHjVpztSqaddssWLXxQNEAWPKT6V9L3acZLtJIG P7jqKJ/uyYuOfJQd6D54//wbqQZztUYKU7QSBxmmSug8LPk9pTEDlUkX1Dsy7E5R1jt7s 5HET06w5UlbIoLv6WN3giRsBi0kNF70AZOVoq07X+55ZgZ9G/+nHHXDnFtBebCZGSw0eg eB/OrLq5GU1X8uyFzhlvCLAtUH/XgGM26Sphk9KJi5fb+I0A0RdrY+Vzj8BMMmpJtaw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=bk9tlQV3; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C30CB606A31C; Mon, 9 Nov 2026 13:41:12 +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=bk9tlQV3 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 686A01F008A7; Mon, 9 Nov 2026 13:40:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794231672; bh=vXnN4wP7YrRqcl/kzLqC3ibVyCYH5Vwpm+s2u3nE+fM=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=bk9tlQV3JmFD9uT+BBoFG0Y2WscnfjTaEiPgkxT5GhrocFAfv9ZeQD1n0cBbBuRDD UvCJlkW+8VKOAZty6EKE1cUNirPOPuGRa+XgB8OZ8sGJDyfxug+ZyO05kgjatX20tT qGntVXE1JDp2J8VcnZTRCvGoC7wOupjpNOt7UVEaDBdIdwYVw6UYEIHcm2TlaZEX/Z v4NVV8K6Bn/X8aVHuF5ian/BFE4kbCHIAF6YgOGLuXJAVdTtBWVaLxshIRZNd554lM 3PBoA/jda9ss8181UzzC4N0lg9o5iZKdeCq+m6QaCVehjcyruhpjKnKWYughz+93qL 5rIHrNEXZKRUQ== Message-ID: <93fef824-9f60-4940-9ee6-80c9c8e3f945@kernel.org> Date: Mon, 9 Nov 2026 14:40:48 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 00/13] mm: continue vma_flags_t conversion To: "Lorenzo Stoakes (ARM)" Cc: Andrew Morton , Jason Gunthorpe , John Hubbard , Peter Xu , "Matthew Wilcox (Oracle)" , Jan Kara , Rik van Riel , "Liam R. Howlett" , Vlastimil Babka , Harry Yoo , Jann Horn , Lance Yang , Zi Yan , Matthew Brost , Joshua Hahn , Byungchul Park , Gregory Price , Ying Huang , Alistair Popple , Baolin Wang , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Usama Arif , Kiryl Shutsemau , Xu Xin , Chengming Zhou , Madhavan Srinivasan , Nicholas Piggin , Michael Ellerman , "Christophe Leroy (CS GROUP)" , "Ritesh Harjani (IBM)" , Shrikanth Hegde , Pedro Falcato , Kairui Song , Qi Zheng , Shakeel Butt , Axel Rasmussen , Yuanchu Xie , Wei Xu , Baoquan He , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Leon Romanovsky , SJ Park , Rakie Kim , David Rientjes , Alexander Viro , Christian Brauner , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark , Masami Hiramatsu , Oleg Nesterov , John Johansen , Georgia Garcia , Paul Moore , James Morris , "Serge E. Hallyn" , Mimi Zohar , Roberto Sassu , Dmitry Kasatkin , Eric Snowberg , Fan Wu , Stephen Smalley , =?UTF-8?B?T25kcmVqIE1vc27DocSNZWs=?= , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org, damon@lists.linux.dev, linux-trace-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, apparmor@lists.ubuntu.com, linux-security-module@vger.kernel.org, linux-integrity@vger.kernel.org, selinux@vger.kernel.org References: <20261105-late-2026-vma-flags-v1-0-0d3cd15ab75f@kernel.org> <1c0b1368-a381-4b25-bba9-7a4f8e92b764@kernel.org> 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: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 11/7/26 21:09, Lorenzo Stoakes (ARM) wrote: > I think we're slightly talking across purposes, so to be clear - I am totally > fine with you taking any of this through your tree or whatever works for you and > Andrew to avoid merge pain :) > > I was just talking more generally about how to merge series that touch a lot of > subsystems and maintainers-who-may-never-reply, etc. > > These are the edge cases that make things... fun :) > > Anyway, I guess easiest resolution here is for you to take the bits that belong > to your trees and Andrew takes the bits that belong elsewhere? Yes, that's what I did now, applying #1,#3,#4,#5,#6 7+8 touches some of my components, but the chance for conflicts are hopefully small. > > I don't think anything here has an inter-dependency. > Yeah that makes it a lot easier. > > On Sat, Nov 07, 2026 at 08:26:29PM +0100, David Hildenbrand (Arm) wrote: > [ ... ] >> >> Because of [PATCH 05/13] mm: convert THP VMA flag tests to use vma_flags_t which >> is THP-only, and feels like it could go straight through one of my trees, >> avoiding conflicts with Andrew's tree. But maybe there is more to it that I am >> missing. > > Sorry about that! Please take that through your tree. > Not your fault, I guess we'll have to get used to merging stuff through separate trees, and dealing with conflicts that cannot be avoided :) >> >> I assume stable topic branches would fix that, but they are currently >> unfortunately not on the table ... :) > > I guess we need everybody-on-git for this! > > I guess when Liam and & I have the VMA tree we can do that at least for stuff > that goes there :) Ack! > >> >>> >>> >>> Right, but sometimes functions are declared in one place and called in >>> others. It is impossible to change the signature of one without also touching >>> the others. >> >> Yes. Something like that is unavoidable. Or if you need new APIs/ > > Yes. > >> >>> >>> >>> It's not really all over the place, it's converting vm_flags_t to >>> vma_flags_t across madvise.c, which involves changing a few function >>> signatures, whose callers must be updated. >> >> Ah, yeah. What on earth does arch/powerpc/kvm/book3s_hv_uvmem.c do with madvise :( > > Yeah it's quite worrying that... :) > >> >>> >>> I could split it up into 3 patches where 1 does internal-only, one changes 1 >>> function, and the next changes another, if that works? >> >> No, these things really have to go in as one unit, no need to split that up. > > Thanks, yeah, it's a pain I know but eventually 'one fine day' (probably in > 2028) everything will be converted to vma_flags_t/mmap_prepare and we won't have > to think about this :P Right! :) -- Cheers, David