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=1793723044; b=z94vvsVMva5I/OdTiQUG7g/Gz/ir4luUKmV3NKCxmTc8zUBzL/r5UjGCCFmB9LHVYQtE +I+p5fZX7niIwkSdEYqKvqq5wCNZn16AvyfuFZBa07Scx1T2ZEdHMANIL0gJjij89uoRv f+i7jLQDrYL2LhLlqLqKr0b0s+F9H0f5c6ij3Nam1NutWdMfWOi9q6HwA3cfCikYMZ+uk FJLKkSGl7yvNtyVylfSI6nIqkcNSn6pR6Po6hpAxYwbpdN5WYygQAx9+Ms2By0gC6BYc8 zUIk9sz01WAlqKU+wew/NHqNZx9UwrmFZ/iCu/33vT1Ij3IOcfTeFTjgKtZuQDDzC/Q== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793723044; 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=4r3GXE7D/VKsxdrJGYislD9zQL6xUFs08TL6iBbCuDM=; b=D0uRFhO6ZNppCD7UjAbhIMyuMGzNM2x/MnjvS8VUHdEFPvg9FK+NDv770Z9dDFsvE3Wl 3uWC1B+YM0VS3eulzbtshZMPVTRS2SErTV+7IjHsoRB5xIhwF9ZEvv8hbyHoOxY0Waf49 grOiy6IigjUMmWs3WsPS6tIQLWMvca/mrP7ZW4aW+FqHc3i0XyMkzMuLWHTZ4Y5ECvPoz Rcv9EUKCDldDPeJpMbn4xz/8OCDo7y4CyfO0yaj0jImLnNhFey8IC+VZ4YEIouOLCEWMm 1PYr/1WJl+VFoctIj0KuchjoxTfVVf01+G+HdDZfVOdgbWtcBZ4urHyKywg+z+/x3fg== 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=aZlR1E54; 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 A591E606A324; Tue, 3 Nov 2026 16:24:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=aZlR1E54 Received: by smtp.kernel.org (Postfix) with ESMTPSA id CF38C1F00919; Tue, 3 Nov 2026 16:23:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793723043; bh=4r3GXE7D/VKsxdrJGYislD9zQL6xUFs08TL6iBbCuDM=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=aZlR1E54tj2woQj3u+lfcauS14uPIk5Y4waaTpwy/h5JtRIw0M8zyPKu2+XCopiVW FWKAPPbZfynqufPMwVIYF/JwMsZiNRrXdELsOBouaU+n24Bl9xkfzpX5aHDIXcOQfC DWGUfY77RnkwdaS4kRZjR/+27KxjBFeF8JBZVnA2Ph6e08xVOf0D10cGircBXwpWy6 dD7NH/UqSVVOmma3z44OCdeji4ZBF6hyB0WruIuto78ghdjjTgKe14AlFo6VoGIlPR 4i3gVVexpORJHU0i00/lkIiLWdhtGKnSgahrixF6rWi3Dm3cfQBkh02D6gp8p3umB6 sMKi7fCProX2Q== Message-ID: Date: Tue, 3 Nov 2026 17:23:40 +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 2/7] MAINTAINERS: TMPFS (SHMEM FILESYSTEM) updates To: Hugh Dickins Cc: Alistair Popple , Andrew Morton , "Aneesh Kumar K.V" , Baolin Wang , Baoquan He , Barry Song , Brendan Jackman , Byungchul Park , Chengming Zhou , Chris Li , Christoph Lameter , Dave Chinner , David Rientjes , Dennis Zhou , Dev Jain , Gregory Price , Hao Li , Harry Yoo , Jann Horn , Johannes Weiner , John Hubbard , Joshua Hahn , Kairui Song , Kemeng Shi , Kiryl Shutsemau , Lance Yang , "Liam R. Howlett" , Lorenzo Stoakes , Matthew Brost , Miaohe Lin , Michal Hocko , Mike Rapoport , Muchun Song , Naoya Horiguchi , Nhat Pham , Nick Piggin , Nico Pache , Oscar Salvador , Pedro Falcato , Peter Xu , Peter Zijlstra , Qi Zheng , Rakie Kim , Rik van Riel , Roman Gushchin , Ryan Roberts , Shakeel Butt , Suren Baghdasaryan , Tejun Heo , Uladzislau Rezki , Usama Arif , Vlastimil Babka , Will Deacon , Xu Xin , Ying Huang , Youngjun Park , Zi Yan , Jason Gunthorpe , Manfred Spraul , Christian Brauner , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org References: <20261030-maintainers-v1-0-97278f8a5f54@kernel.org> <20261030-maintainers-v1-2-97278f8a5f54@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 11/3/26 09:27, Hugh Dickins wrote: > On Fri, 30 Oct 2026, David Hildenbrand (Arm) wrote: > >> I am not really the best shmem/tmpfs/memfd expert around, but it should >> be good enough to judge when something is ready to be picked up, to then >> pick it up. I'll have to heavily rely on Hugh and Baolin on judgment >> for the more involved and more controversial bits. >> >> Rename "TMPFS (SHMEM FILESYSTEM)" to "MEMORY MANAGEMENT - SHARED MEMORY >> (SHMEM/TMPFS/MEMFD)" and move it accordingly. Add myself as a MAINTAINER >> so people know whom to CC. > > Thank you for taking this on, David. And thank you of course to the > unlisted Andrew Morton, who has been uncomplainingly filling in for > me year after year; and thank you to Baolin too. > Hi! > "SHARED MEMORY": should ipc/shm.c be added to our list of files below, > as mm/memfd.c is? (Though both can also go off to hugetlbfs instead.) > Or do you prefer to regard ipc/shm.c more as a client of mm/shmem.c, > rather as drivers/gpu/drm is? I would consider it more of a client indeed. memfd started out as a client as well, but things escalated a bit ... :) I see that Andrew is assigning it its own section, is that good enough for you? > > We don't often have to touch ipc/shm.c, and generally ipc/ is well cared > for by Manfred Spraul (but I couldn't see a block in MAINTAINERS for it). Agreed! > >> >> Add mm/core.git as the target git tree. Once shmem becomes a high volume >> component we can dedicate it a separate tree and have dedicated people >> pick it up. > > Okay: but do keep in mind that tmpfs is a filesystem, and often the > FS folks make small adjustments to it, which usually go unconflictingly > through Christian Brauner's tree. Yeah, I think that's just fine and expected. I know Christian, so that's easily dealt with off-list. Thanks for the heads-up! > That generally works well, so please > let's keep on working in that way (just once I remember holding off > intended MM changes to shmem.c for a release, while FS were busy there). Jup! > >> >> While at it, add some more shmem/tmpfs/memfd related files+directories >> we missed so far. >> >> There is also "kernel/pid_sysctl.h", which includes some of the pid >> namespaced sysctl vm.memfd_noexec. But that's really more of a proc/ >> namespace thingy, so it's not a good fit here. > > Agreed: if I ever heard of it, I soon forgot. > >> >> Signed-off-by: David Hildenbrand (Arm) > > Acked-by: Hugh Dickins Thanks Hugh! -- Cheers, David