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([2620:10d:c092:600::8a7e]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6005ac336d5sm9221196a12.54.2025.05.21.09.57.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 21 May 2025 09:57:49 -0700 (PDT) Message-ID: Date: Wed, 21 May 2025 17:57:48 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 0/5] add process_madvise() flags to modify behaviour To: Shakeel Butt , Lorenzo Stoakes Cc: Andrew Morton , "Liam R . Howlett" , David Hildenbrand , Vlastimil Babka , Jann Horn , Arnd Bergmann , Christian Brauner , linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, SeongJae Park References: <7tzfy4mmbo2utodqr5clk24mcawef5l2gwrgmnp5jmqxmhkpav@jpzaaoys6jro> <5604190c-3309-4cb8-b746-2301615d933c@lucifer.local> <226owobtknee4iirb7sdm3hs26u4nvytdugxgxtz23kcrx6tzg@nryescaj266u> <7a214bee-d184-460f-88d6-2249b9d513ba@lucifer.local> Content-Language: en-US From: Usama Arif In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 1341F140007 X-Stat-Signature: btmkoepicotyu56c5zymezgm3bdy41it X-Rspam-User: X-HE-Tag: 1747846670-985576 X-HE-Meta: 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 phB3KyuH 4pivsB+oi/F/pdymwjJ0bo6ugmY8fJP6TXk4vkTmo0fbfi6PVD3+CbxYOsQA73Nse6OSiUqKiKOP7Vlm+QMP0WK6EnqzOm7kwbCyQcnnXIS2ha8HyUiEctuAyX+Y9RZwZQQjqh3odiby7RxTQsWLB+jMfEYcklnw1/j1NLe1pGS+XbhQeZYCp1JMgbsXlvyWTGjVWf1/EzrFlugggbGlOeH2FAFoszpkbbEp1Lb6I0xIXUbUHOX37Jgpd+Q1hjBrXN6w83GBZhMUQWh2WwumtRgCu4X0utccbMGT2jBM3cLQSNIxyaOQvn5uHtXtfZ3NmyIfIAieJnGSHPbZ/oRVUzspRw8ekGcNF63MNnCdZqU/BnpNMqt25l6kdmGIXMk2W8GqK2crWr48Z5GaeMdoKYrZZHnSBDLYiXv0uhTiK8bnmKWhgAy21vbF218Gu7kOj+usvQFDZ0EdcCS5Ryi5JdL1ohbAZXq+JlOYv X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 21/05/2025 17:28, Shakeel Butt wrote: > On Wed, May 21, 2025 at 05:21:19AM +0100, Lorenzo Stoakes wrote: >> On Tue, May 20, 2025 at 03:02:09PM -0700, Shakeel Butt wrote: >> > [...] >> >> So, something Liam mentioned off-list was the beautifully named >> 'mmadvise()'. Idea being that we have a system call _explicitly for_ >> mm-wide modifications. >> >> With Barry's series doing a prctl() for something similar, and a whole host >> of mm->flags existing for modifying behaviour, it would seem a natural fit. >> >> I could do a respin that does something like this instead. >> > > Please let's first get consensus on this before starting the work. > > Usama, David, Johannes and others, WDYT? > I would like that. Introducing another method might make the conversation a lot more complex than it already is? I have addressed the feedback from Lorenzo for the prctl series, but am holding back sending it as RFC v4. The v3 has a NACK on it so I would imagine it would discourage people from reviewing it. If we are still progressing with sending patches, would it make sense for me to wait a couple of days to see if there are any more comments on it and send the RFC v4?