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 B45163D79F1 for ; Thu, 18 Jun 2026 12:36:36 +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=1781786197; cv=none; b=FUOEtknHEDU6NuhP1kvjN6QGsOzv7rYQPEbzS/8j3CMG3O/qk6lNOLRqbKwJ12LnYG57eUQbFMuTVKiJRE0R2pg2S5k+6yu5iNt/Pfjh2LzF1bHvqwWIgUhipq7rhUityrR/SFz/oEx1VDuetUNg32gH7+v7gLWIZV1kcFG7id4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781786197; c=relaxed/simple; bh=C279rKk3PJmAzBqmT1bxctuYMP8GbKRnwdwCB50g7ck=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Qxyv3DOo5p1ZVUt1HSotemacYG4/fc+XCK80rYRhYXkQgEewCLVZvpnjJjXyvsNV6JTj8LwxQPqPCkk7IKhqCcXkeju85KHSddwhOBBDK+Agx2qMl7j5NVWSjSF+BRDHLrR0w2LK5c6X5ZeRwcI2x6sj79EfmIy5qafwRJB81Ho= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KzUnWw2j; 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="KzUnWw2j" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 06B991F000E9; Thu, 18 Jun 2026 12:36:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781786196; bh=PdWgWriMzVNJt/W/nkcNsEreC6xCA0ElpI0RGsAGQxY=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=KzUnWw2j5Vyr/D9W95J6/+7kPMLi0jCCd8jZOrHYYdcqEyTc5+01mJ171Gl3qHLIn wHrb2H78BM5ktFgpzmyNv444zlwHurCF4C4PSZjmshxgjn0Quch4IHt21WDRDq8hvn QRk8IxpsaI9yg7GarR+xecr2eBPz/pzb52W1YO1rviuwZoZe+s85YlwREqkiDb3a6+ wfEKOg60GwAtE5FvG1PZf1eBjYpZZKvWxVpR6+grv71pEe6P8Zq9HACMmJIRuohXCm 5ew0TZXYtWqLKs4BnCKa2An3/UDJKcNUu+RCTOE8onxW3G5PIfRwDD68r0xU9DnpiL RLQ9Te8RgsDfQ== Message-ID: <0e5b23a6-4895-454a-9dfa-6dc21adc2991@kernel.org> Date: Thu, 18 Jun 2026 14:36:25 +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: [RFC PATCH v2 1/3] mm/huge_memory: make persistent huge zero folio read-only To: Xueyuan Chen Cc: dave.hansen@intel.com, akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org, catalin.marinas@arm.com, will@kernel.org, tglx@kernel.org, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, hpa@zytor.com, ljs@kernel.org, liam@infradead.org, vbabka@kernel.org, rppt@kernel.org, surenb@google.com, mhocko@suse.com, ziy@nvidia.com, baolin.wang@linux.alibaba.com, npache@redhat.com, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, yang@os.amperecomputing.com, jannh@google.com References: <20260618114822.165413-1-xueyuan.chen21@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 6/18/26 13:48, Xueyuan Chen wrote: > > On Thu, Jun 18, 2026 at 11:06:41AM +0200, David Hildenbrand (Arm) wrote: > > Hi, David > > [...] > >>> >>> How about naming it int set_direct_map_ro(struct page *page, unsigned nr)? >> >> To distinguish it from "set_memory*" cruft, maybe best to use "remap" or >> "adjust" instead. >> > > OK, how about `remap_direct_map_ro`? If no objections, I will add this > API to `set_memory.h` in the next version. Best to wait for some feedback. I do wonder whether we want to pass an address instead of a page. https://lore.kernel.org/r/20260410151746.61150-2-kalyazin@amazon.com Wants to convert existing ones as well. That would imply that the caller must check for highmem. But then, we could just use existing set_memory_ro(), right? -- Cheers, David