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=1794079628; b=BzmVAzp8mOymRpzljLImzqzOddyb9FQaoUuhV3rrEZcdkG9dc+nuErwDUmtoIm+Sc2fV BEuTPlE71cBivNrVjMhCckBvk9TlQZVnhedrcRv4eMc576SJpjdnZ/X6S4zkioZRwo611 zqVucwF6GuvbpPM8uiCmEUhxfPMO6kjHjmgeHcCU82gEwH+/NSz6l6Pmd/xX6tJGohdnr PJWZpiKkfL9oQYYwmD3XRY/mlNTLJwkZTtQjT3a2CV9O54mukzXdZEoMQGVUIp71e5U+H iH8eskqjI5II+v1z7qINxCumC/+fkZeZnCNWmvBnVd3t595XYYPwqIxRvNI4YHbJlOQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794079628; 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=JWUWmDtmMJj9uR+KdODad96y/2aPbtjqytw6K7FIvTo=; b=OaTXM1KMYY+6EN6bMeX1IP9BPlP44YfSSv8Bhpl5nfb3T1P1udtOZx+LqUXJ0MPzgdUz qcCTelBljkOciC8WL5LEWKt1V7Z4DN9yyRFKMU9BA04HtO9aXAV834drtluH3IvqnslS+ uuylAnFCdKQd5WRbgudSTeriQWirR44cI9zshpsgqyt4tMHHiaDBjJwp3PQLgJ4uraMb9 UyynOQWd9+aRrx9baEqfZiR7rBbNhn2FAOOPTarslLpVYDroS1AQgVAYYftknZ/MfglYM SN/z8bvqWgRAPrRNWxkapviuxW0L2LQrZ7y/0GMO/aKST2ZL9adRhnD16NwNb7tzWcw== 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=l4qb68Vh; 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 480B5606A326; Sat, 7 Nov 2026 19:27:08 +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=l4qb68Vh Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4B5851F008A3; Sat, 7 Nov 2026 19:26:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794079627; bh=JWUWmDtmMJj9uR+KdODad96y/2aPbtjqytw6K7FIvTo=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=l4qb68Vh5+EpKxfkY8T2j1202etzw9CcaJfnA0gcKPSK2QHF/jdVbFeNxQcShSzl2 kGpXtGW2fD0YNMDmHCEE3KSCdbOQiaNyhgkt6IR9Mflf4BT8u9+mw5mx8X2EiIZj2J W8W07b0n8ionghCXH/Pzs86IDhVnoJB0NTTVnrhSptFlIBu04i6fwkc33GYm5oDenJ dpcADsDdrjz0nxyX8rqzWI9tfKG3Iau9FGoEwVkaWYXlv7gP2dIUmvZTJfklUnLWIc 8i4jWo0RR5wZfXr60bMXqdXmQ18dHss7MDPdDsIl+hGwk9ACyEf8QSb02+CeyhY9ai zAA+05ycOtvEw== Message-ID: <1c0b1368-a381-4b25-bba9-7a4f8e92b764@kernel.org> Date: Sat, 7 Nov 2026 20:26:29 +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> 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 11/6/26 16:22, Lorenzo Stoakes (ARM) wrote: > On Fri, Nov 06, 2026 at 03:35:01PM +0100, David Hildenbrand (Arm) wrote: >> I agree that this should be picked separately. For example, I will pick >> everything that falls into my realm to reduce conflicts. > > Hmm, generally tree-wide mechanical changes are the exception to that rule > no? I think it really depends. If changes are well standalone, I don't see why it couldn't just cleanly go through separate trees. Anything that is more involved (like the madvise change), there is not really a way around. Well, there is: stable topic branch and letting separate trees merge that ... > > It's going to make the rest of the VMA flags/mmap_prepare conversion really > quite difficult if I have to chase every single driver maintainer in the > kernel (literally in both cases pretty much :). > > And sometimes there are dependencies which mean you really can't split it > across trees unless you establish functionality in one cycle and callers in > another, but that seems a little silly. > > I was thinking that once the VMA tree is separate I'd put mechanical > changes like this through it. Is that not the way to go? Maybe? We'll have to learn. Right now it immediately caused conflicts between mine and Andrew's tree. 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. I assume stable topic branches would fix that, but they are currently unfortunately not on the table ... :) > >> >> Ideally, patches really only touch one component. > > 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/ > >> >> [PATCH 07/13] mm/madvise: convert madvise_vma_behavior() to use vma_flags_t >> >> is all over the place :) > > 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 :( > > 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. -- Cheers, David