From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 32C7C3F4138 for ; Sat, 19 Sep 2026 10:08:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789812527; cv=none; b=hzGZUeZkAe/CAYq5utWTXKSbk13DPLAWTEBLUdJOinbogBIEGt64uEfYcxYwn8sHt1LLMDGm/OE3SuD33BFSUZOKSKXwUvmIE+VxxhDBgMClaIasf0B/CjuQzOwC/wMrhLP2OFXeSh4oHDlXtfEs/RGJjESYrrd6pT03q7jLxbQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789812527; c=relaxed/simple; bh=cTYLF9V4r+wP6EO811QDYsO0MYUieB3sMgUgL9M7bds=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=t9blBLgRlaCf4LkJ7V7sGIb1RmTK20YUeSEheqEi+Y/mHVFK1tTvUye4PA9lUnfCwKL7ZmeSH+vnuvjV/YG588eC6nT16zsASVIA4Vu2bdbsSOCtksKrTsf65wrNSJuJDgTPILPdrw3bNnkHGIhjU+zYsd9fBfkqYIrMVXZtsK0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=i2rIvrh0; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="i2rIvrh0" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AEAE31F000FF; Sat, 19 Sep 2026 10:08:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789812525; bh=UiNALGjswuiBQwEZJ2i4Ir313lV2pkq353ZxgdvCD2o=; h=Date:Subject:To:Cc:References:From:In-Reply-To; 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 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 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 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