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b=i2rIvrh0XKa1h927iSDM0HE8S2bK1LX9H3CHf4bpEEQol4A0geK4/OvQ71TwVbV4G FYGYQiPWqZCSMbI7Gap2Edl+MS8H+BFuxVwqiUySMUXt+DwE9hzGL4irirfITqgtIa ydvaGZcaLC1uecW0qMq6StUTHJv1ia3aDDiUlJlvqj032WL1A+7imSOtJar5QChp9s fz8ply4tp/bVvoavxUH+Qg2drqMH7mRbaXPLAXtfOOaJ8SvrfqQHpy0p/dA/tuetXN yQpM3fchJ0Mj65Mgqe8U7acWnyHvedAN04X7ipZzeHjsKMvYz2xOK7UxZCD9kkxgtp btlD0K+I2z10g== Message-ID: <8cbbc303-59a5-49f6-bc14-28fbb58350f0@kernel.org> Date: Sat, 19 Sep 2026 12:08:35 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 0/2] mm/memory: reuse the whole exclusive large folio on a write fault To: Yuan-Hao Hsu , Andrew Morton Cc: Lorenzo Stoakes , liam@infradead.org, Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Barry Song , Ryan Roberts , Dev Jain , linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20260918064238.868-1-aa9736195201@gmail.com> <20260919073134.639-1-aa9736195201@gmail.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Stat-Signature: 6aodgat9q7e1oy1n3b9fxqt13gsdn4yi X-Rspamd-Queue-Id: 78123180002 X-Rspamd-Server: rspam07 X-HE-Tag: 1789812526-409008 X-HE-Meta: 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 7qC95D51 X5qBZQ/cD1vWlgvVI5rBzWRhOppE5XI1mUb7MVRSMRkPEExTej/9jRZ/HA0qc0SuFVUBIEEJnhkI8w5zcjhQ7t6FVIPxRl+6BRMMjtr1jElmGvwIObtYahhHU6kv0H9DLW+TS70efO1Bjrrb0toNTltKzL7mb+h7DQGnZhJ4pFw2foU3eO+ALcckNzSIr5DzSIRvxiocfmp1wxEs2BirPX50K8UAbOqtS5dOckRs/Jl0awt4WiUWmVZo3y0W9dzy6EIYD Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 9/19/26 09:31, Yuan-Hao Hsu wrote: > After fork() and the child's exit, the parent's write faults reuse a > large anonymous folio one PTE at a time, although > wp_can_reuse_anon_folio() has already found the whole folio exclusive. > > v2, after the comments on v1 [1]: Please don't send out a new version * Unless a maintainer asked you to * At least one week passed -- Cheers, David