From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C730E35972 for ; Mon, 9 Dec 2024 14:44:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733755476; cv=none; b=eYiiq1A10Juk/2uxMjPEcX0COwXfv2SE0uf8Yc5IDiA1MFb3cqgYI+kUxHdYQ34W1CyVcCGEazpi+vu96P9Hbw4LCO8J70GfKQ7MdHWoJryUbbkIH6uRey8c8DOuOdTGkBIvdg1ULgnDBYNO4vSMYo590lIeyihlk9HDDTJ8840= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733755476; c=relaxed/simple; bh=POzevi/sJR16lnIZCSJAVx3hMA4/ae08fxgLzwtMwrU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=i57dLQ3zWYu+ylBAJGsN+YWo9qwINNkKm3cIRhNrM7HD4DD6qAYHh9hw19yy3nBwSdZrAPoeIMu7od/nrf8x5twM263P1E3Y3qdf17VjPGOfXurLlzzLGLVeJxlJXJ0bkSGUTl228bnoenLuw1ddp8u8NyDHxSc9VOAf3NbHfu0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=Fw7LGS7P; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Fw7LGS7P" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1733755473; h=from:from: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:autocrypt:autocrypt; bh=5CbBUgvwO9PF2a6CtW8LBTEhmt4KZFC1qy1+8e37Py8=; b=Fw7LGS7Pist8RvrHlmoiSH9exv8NdJ8IPQQzmmiuFGRjBOzUiRRGmSFhzCjn3jXjK1uyL1 L75LaCnSv7Ge7JCSTvonrhoHCbvkiVQdNYqSc+lD6xyT5XNwV6TohzURDl6wpnOxhIG5od qr1vZRSfSrsI8ho5vS1fJYtBhKjNz8Y= Received: from mail-wm1-f71.google.com (mail-wm1-f71.google.com [209.85.128.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-122-iDevHNEYOEuBko7Drv-TNg-1; Mon, 09 Dec 2024 09:44:32 -0500 X-MC-Unique: iDevHNEYOEuBko7Drv-TNg-1 X-Mimecast-MFC-AGG-ID: iDevHNEYOEuBko7Drv-TNg Received: by mail-wm1-f71.google.com with SMTP id 5b1f17b1804b1-434f40667e5so8745335e9.1 for ; Mon, 09 Dec 2024 06:44:31 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733755471; x=1734360271; h=content-transfer-encoding:in-reply-to:organization:autocrypt:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=5CbBUgvwO9PF2a6CtW8LBTEhmt4KZFC1qy1+8e37Py8=; b=Mnc36JSfhCAtpAXA+CbcpFiWyI2+NJ1dISnmc0s9ScIMMyCyTl+e33WK1ojt58ZgLp T97DIXD1DXxX5MXqcg9gLefm7rkRLBKRIwScFTO00wKRNIzphMR6ujOuZlw2RssKOCMe MwOrfwl0ixtaIsxmanW5L9knLVse5ta0ixecOwsC5zbiXCxV5+vMC5nZJ8mljrPN4SbP Y+Tmx6YlusQ+Xn4+SQaSMPuQ1kvWJYlfZcSpsBueVuKp13CB1maDszwsW9zjgN0eJEnP IP2RatURS3+QRp0zR1OU2dgJAzyBMlfH4TEzSe6hOdFVZtxFL+FhpmW6pfxwm+PCV0IF z5pQ== X-Forwarded-Encrypted: i=1; AJvYcCUzdVG5fPBDzdrAk7DyviX/zEkn3j+tCNKsOIVheSyg36+dsAkL5qS6uJJF6qpxoZShQEIQznUL68lLWBI=@vger.kernel.org X-Gm-Message-State: AOJu0YyRt3dMbeLCbHXwmCE2Uxr6RuHGD5boqcZodvTnOo9rJBe18HeL IypI1ggq3jWwMp4cR3ZlCryiZmzkAwElbSr9AJjdUblRdRSgdRXrJs5FCVoyZnxBZh8bKlXhfgy LNltM9tbNDay1SE4KE6o6TtyRUWiFlYSDOjfJ2hQ1Oas6R/XvaP2Nq9rMxb6deA== X-Gm-Gg: ASbGnctAqYrNhvTBZzrdZir9dsgfIYL4gPWxUwlglDN9IdzqjzdkC+rKZ58szWD5dFu X3GNXXabQtvr0pc+3ICip7fA6A7gQGP38vqJxapE0Um1n+JqOIZOWu159vlUJOVj9EeZ77NYEvB wtBm3vuMRWFIxUbvxJ2zPTm80NQptijzUhZrxYFaPnL0BoMhkIYLc75lObLz76DUReyguODrHAZ YtyLP30bfCFoADYPEyJzHQhtDCJ/VGPMI7qCQt1niMxLgqEcXo2Of91cSyyV/U6aIlXIO61BZ4O D/w9erVf X-Received: by 2002:a05:6000:178e:b0:385:e1a8:e2a1 with SMTP id ffacd0b85a97d-386453d2830mr645633f8f.3.1733755470939; Mon, 09 Dec 2024 06:44:30 -0800 (PST) X-Google-Smtp-Source: AGHT+IFYNF1nXizPyJ4CmmmTmUlpFe31fC62Fm81HOC0AiOSanO+UFM5T9A+s/Oi03hYC4PikjUgZw== X-Received: by 2002:a05:6000:178e:b0:385:e1a8:e2a1 with SMTP id ffacd0b85a97d-386453d2830mr645610f8f.3.1733755470508; Mon, 09 Dec 2024 06:44:30 -0800 (PST) Received: from ?IPV6:2a09:80c0:192:0:5dac:bf3d:c41:c3e7? ([2a09:80c0:192:0:5dac:bf3d:c41:c3e7]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3862e3fe716sm10052540f8f.7.2024.12.09.06.44.29 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 09 Dec 2024 06:44:29 -0800 (PST) Message-ID: <9ee8d6a9-12ef-4393-96db-40c3fd35387f@redhat.com> Date: Mon, 9 Dec 2024 15:44:28 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] MAINTAINERS: group all VMA-related files into the VMA section To: Jann Horn , Lorenzo Stoakes Cc: Vlastimil Babka , Andrew Morton , "Liam R . Howlett" , linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20241206191600.45119-1-lorenzo.stoakes@oracle.com> <23d3d7f6-d6d1-430e-8ea0-ccae76b253fd@redhat.com> <41a14051-75ee-4de3-863c-d0532aa7e3aa@suse.cz> <1e4c3e31-ea9a-4af4-83f9-15a882732e69@redhat.com> <71beb3d1-21ac-4037-8363-6484c0c333b8@lucifer.local> Content-Language: en-US From: David Hildenbrand Autocrypt: addr=david@redhat.com; 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 B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 09.12.24 15:38, Jann Horn wrote: > On Mon, Dec 9, 2024 at 3:11 PM Lorenzo Stoakes > wrote: >> On Mon, Dec 09, 2024 at 03:00:08PM +0100, David Hildenbrand wrote: >>> On 09.12.24 14:25, Vlastimil Babka wrote: >>>> On 12/9/24 10:16, David Hildenbrand wrote: >>>>> On 06.12.24 20:16, Lorenzo Stoakes wrote: >>>>>> There are a number of means of interacting with VMA operations within mm, >>>>>> and we have on occasion not been made aware of impactful changes due to >>>>>> these sitting in different files, most recently in [0]. >>>>>> >>>>>> Correct this by bringing all VMA operations under the same section in >>>>>> MAINTAINERS. Additionally take the opportunity to combine MEMORY MAPPING >>>>>> with VMA as there needn't be two entries as they amount to the same thing. >>>>>> >>>>>> [0]:https://lore.kernel.org/linux-mm/CAG48ez0siYGB8GP5+Szgj2ovBZAkL6Zi4n6GUAjzzjFV9LTkRQ@mail.gmail.com/ >>>>>> >>>>>> Signed-off-by: Lorenzo Stoakes >>>>>> --- >>>>>> MAINTAINERS | 19 +++++++------------ >>>>>> 1 file changed, 7 insertions(+), 12 deletions(-) >>>>>> >>>>>> diff --git a/MAINTAINERS b/MAINTAINERS >>>>>> index 1e930c7a58b1..95db20c26f5f 100644 >>>>>> --- a/MAINTAINERS >>>>>> +++ b/MAINTAINERS >>>>>> @@ -15060,18 +15060,6 @@ F: tools/mm/ >>>>>> F: tools/testing/selftests/mm/ >>>>>> N: include/linux/page[-_]* >>>>>> >>>>>> -MEMORY MAPPING >>>>>> -M: Andrew Morton >>>>>> -M: Liam R. Howlett >>>>>> -M: Lorenzo Stoakes >>>>>> -R: Vlastimil Babka >>>>>> -R: Jann Horn >>>>>> -L: linux-mm@kvack.org >>>>>> -S: Maintained >>>>>> -W: http://www.linux-mm.org >>>>>> -T: git git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm >>>>>> -F: mm/mmap.c >>>>>> - >>>>>> MEMORY TECHNOLOGY DEVICES (MTD) >>>>>> M: Miquel Raynal >>>>>> M: Richard Weinberger >>>>>> @@ -25028,6 +25016,13 @@ L: linux-mm@kvack.org >>>>>> S: Maintained >>>>>> W: https://www.linux-mm.org >>>>>> T: git git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm >>>>>> +F: mm/madvise.c >>>>>> +F: mm/mlock.c >>>>>> +F: mm/mmap.c >>>>>> +F: mm/mprotect.c >>>>>> +F: mm/mremap.c >>>>>> +F: mm/mseal.c >>>>>> +F: mm/msync.c >>>>> >>>>> Not sure about mprotect.c, mlock.c and madvise.c, though. I'd claim that >>>>> the real "magic" they perform is in page table handling and not >>>>> primarily VMA handling (yes, both do VMA changes, but they are the >>>>> "easy" part ;) ). >>>> >>>> I'd think that moving vma files into MEMORY MAPPING (and not the other way) >>>> would result in a better overal name, that would be a better fit for the >>>> newly added files too? >>> >>> Maybe. I think vma.c should likely have a different set of maintainers than >>> madvise.c and mprotect.c. (again, the magic is in page table modifications) >> >> The bulk of the logic in mremap.c is related to page tables so by this >> logic then, that is out too, right? > > FWIW, I think technically you can have multiple entries in MAINTAINERS > that cover the same file, maybe that would make sense for files that > belong to multiple parts of the kernel? I was asking myself the same question. But then ... > Or maybe I'm making things too > complicated and it'd be simpler to have some kind of more generic > "core MM for userspace mappings" entry or such. ... this sound cleaner than having files as part of every section with which they partially overlap. -- Cheers, David / dhildenb