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(p200300cbc73f0600933bca695a80230d.dip0.t-ipconnect.de. [2003:cb:c73f:600:933b:ca69:5a80:230d]) by smtp.gmail.com with ESMTPSA id f17-20020a1c6a11000000b00402f745c5ffsm15860760wmc.8.2023.09.26.11.31.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 26 Sep 2023 11:31:44 -0700 (PDT) Message-ID: <5fa4aa95-6982-7879-e067-69fdb8b76d01@redhat.com> Date: Tue, 26 Sep 2023 20:31:43 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.15.1 Subject: Re: ANON_LARGE_FOLIOS meeting follow-up & refined proposal To: Ryan Roberts , John Hubbard , Matthew Wilcox , Yang Shi , "Yin, Fengwei" , Yu Zhao , Zi Yan , David Rientjes , Andrew Morton , Vlastimil Babka , "Kirill A. Shutemov" Cc: Linux-MM References: <4966f496-9f71-460c-b2ab-8661384ce626@arm.com> <4830fb3e-4a35-4842-98f4-9e7baa0e692a@arm.com> <7301771f-d654-4e5a-a197-3a3d8750440c@nvidia.com> <92937776-1e16-47e5-bef9-4c1a04bc98c0@arm.com> From: David Hildenbrand Organization: Red Hat In-Reply-To: <92937776-1e16-47e5-bef9-4c1a04bc98c0@arm.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Stat-Signature: 3cnoichg4j9ofdgqsaygij4k4rp41kzk X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 89E7EC000A X-Rspam-User: X-HE-Tag: 1695753110-909668 X-HE-Meta: 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 GzfSDjra ysHdl+20eG5GuRKh28Q99GkfkNjHHmORQ3rowxWNHenL7GZFWj+tqE5gJQyf0/6TM68xgjuldqxsmxOeMGRtXqrWG6MVvZrlZ8Tncw5J/75PmWaz/74yahFRpp+jUI6NCiU/TU0syTkyg9qqIjb0ybslN6I+ViSv/OyqBkcFKN/SU6vtJ8c3LlGYZL+8gYYo2hRdO/vimijaMp30JYVr52H98Lgsl6T0eQRjkr9jjvbdOlzPdA4o9vEbk6SQV5kGE+m0wFKpDsahuMfLPyDw/cx/wlKhFpXXlQffn6aT8PEmdB3UNzrTStkzoIXAS+8/nuJANf3LhhnDrr3xJwQPyzIPO7lQRvVZzMfzlpyR6udcVJ2yRvXNW5SyW+qQiXDdGHzWP3ITQvBHIPYG9/yvwK7itjIg/KlwxZfn7oZzHh+AoeAU= 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: On 25.09.23 10:51, Ryan Roberts wrote: > On 23/09/2023 01:33, John Hubbard wrote: >> On 9/22/23 08:48, Ryan Roberts wrote: >> ... >>> I never had any feedback on the below; I'm not sure if that means everyone is >>> happy or that nobody read it?? >> >> One can never really know: zero or more people read it, and of those, no >> one hated it enough to send out a quick NAK. So that's a *possible*, >> lukewarm endorsement of sorts. Success! :) > > You really know how to fill a guy with confidence! ;-) > >> >> ... >> >>> BUT I've had yet another idea on the controls front, which would enable exposing >>> this to user space as an extension to transparent_hugepage, while continuing to >>> support THP as is and also be able to control THP and ALF (anon large folio) >> >> The new ALF / ANON_LARGE_FOLIO naming looks good to me. The grep aspect >> is a nice touch. > > Well if we go the route of the newest proposal, then I guess the naming is less > important, because it all attaches to transparent_hugepage. I agree that ALF is better. But having something under "THP", that is not THP and not accounted as THP ... I don't quite like it (although, before we discussed that approach in the past, I did like it). -- Cheers, David / dhildenb