From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 5DF23308F1D; Fri, 6 Feb 2026 09:43:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770370986; cv=none; b=e4Wel1pTgghCihaQFYutpjBgQhVTfPARYmiehDB0gGpoPqa2qrKAsAi/+LORA1Iq4Zz0zsdAGmC+vS0A+8YTHuWNXAAQwlVrdXP+oS9VNqWP0FvZus5z3ztRFT27zOuTAzMi/rg9Ju87YuABXEFDu8dThNXlUZ7prXLrHu8sgm0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770370986; c=relaxed/simple; bh=opKNMeKc5dUGPWp6AFdxTH7O+3QX2spoWarAppjxqc0=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=qDAy+l1/8CJUtkJXnNIeKHID2EUw2rQB0AJU0tP6UEywM6N0IXQd77/xuVJFM9kkgNoVPxGwR4j247F/27BB78PiIcKLiP7yF2DS3RUyLlmlCJp52Fba8g4rBfFh0wlGaTPjb6LgvGEullOORx+kZMLec4Tjt5Fz00/PBzLFuIg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=b0q2M1Y1; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="b0q2M1Y1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4C084C116C6; Fri, 6 Feb 2026 09:43:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770370986; bh=opKNMeKc5dUGPWp6AFdxTH7O+3QX2spoWarAppjxqc0=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=b0q2M1Y1+zFPHhE8ZfPQRp3VzxIogdG5i7e6pVAmwCnkqZPgiOkhMl2qkj3kC5NEg Axto48z8EEp6E+zuf9FLH4pnYtMWe46vAG4eYCOmfS+gE2nvNHhyCacw8WicO7aJFN iSH/EqOPEgf+At3uRYkyWNwfZZNKNh9bPQUVdLdW5QDEojnAfrnUJA5DKNufmuLMHd GH6RBqlMqSwoEKrcIyfmIS5x0Z1ZkDgRhnPL6MfhgJfpbvx6UJz2WqOfW7JACfIbgF GN1R89A+idESDTjIRjGwz1hS/d6rNe5iGfc9RKewY6R+4qqVJj4clFyq6YJNw8/AQA KIT3r+LwgJSTw== Message-ID: <33e5e080-6e07-4cc0-88da-0cb55c9d0ae2@kernel.org> Date: Fri, 6 Feb 2026 10:42:59 +0100 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCHv6 14/17] mm/hugetlb: Remove hugetlb_optimize_vmemmap_key static key To: Kiryl Shutsemau , Andrew Morton , Muchun Song , Matthew Wilcox , Usama Arif , Frank van der Linden Cc: Oscar Salvador , Mike Rapoport , Vlastimil Babka , Lorenzo Stoakes , Zi Yan , Baoquan He , Michal Hocko , Johannes Weiner , Jonathan Corbet , Huacai Chen , WANG Xuerui , Palmer Dabbelt , Paul Walmsley , Albert Ou , Alexandre Ghiti , kernel-team@meta.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, loongarch@lists.linux.dev, linux-riscv@lists.infradead.org References: <20260202155634.650837-1-kas@kernel.org> <20260202155634.650837-15-kas@kernel.org> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 2/2/26 16:56, Kiryl Shutsemau wrote: > The hugetlb_optimize_vmemmap_key static key was used to guard fake head > detection in compound_head() and related functions. It allowed skipping > the fake head checks entirely when HVO was not in use. > > With fake heads eliminated and the detection code removed, the static > key serves no purpose. Remove its definition and all increment/decrement > calls. > > Signed-off-by: Kiryl Shutsemau > Reviewed-by: Muchun Song Acked-by: David Hildenbrand (Arm) -- Cheers, David