From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793785225; b=5bUJdCRPvgSeCKUFM5YU0UJCMHr5B/6mdi09LgUbFIyNjsV4S0h1j9HcppiK9xPQx5SE UtK7fA0W9D3daD+mQCxxWwzYAZmpm6CUJVDJX6lDishmh4g8qQUp/7yiyML/FVue0Db2k TvoYzaxnNEkYPNGWNtjS5b2ojzCjDKd4ftkdsoqtrnpFqncQE8hujOyQNY3vl54m4n3sq pgG08xcb0ph/jSPMhubmh4gTB9PLB5r9xIjn+NWTYb2pLwpguTehiT6weEbbwcC2M6YnB wA/p73KgJiWswTzSt1Dio9llR2ri6cTmBWzunERDqv9/wGQHUQaFzlR3sXCgLQ2iEKg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793785225; h=Received:DKIM-Signature:Date:From:To:Cc:Subject:Message-ID: References:MIME-Version:Content-Type:Content-Disposition:In-Reply-To; bh=3LbmTa3BVHVnVv2Si7sxzWxDFszjGNRZ9XOev2sXbGQ=; b=VaGDVQwZk68f8VljefutJA79A91fyEI++lVCLFn6+jBsjJmKEIp1bLLEsb7XS/Vvf2ay zwVeNhQOUIKSOJxg6GMuSSHK/utgx2jSOlBoQD4+aDALn843mkpqOhaZqebIHQw5fibE3 tOkRJv6OlfbXcBlEtK8v1XyOIXQfqkTmeDXTITTTEnXgV12kC9/uKvhzuZM7teLjXAlX0 g5nBlWZixMQsq9jcaKo/B1idQtMcP5QraJESbj8n7VHxDrqZRO2hIhJLBROIJVhUoDjIR 83j6edOXWfhlHYETUrq/NGgisLYJOaf/8M8GzvxN96g2diACVpyjP/ms6wlnl13M/6Q== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=UHKTO2SN; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9B244606A326 for ; Wed, 4 Nov 2026 09:40:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=UHKTO2SN Received: by smtp.kernel.org (Postfix) with ESMTPSA id C7B4A1F000C1; Wed, 4 Nov 2026 09:40:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793785225; bh=3LbmTa3BVHVnVv2Si7sxzWxDFszjGNRZ9XOev2sXbGQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=UHKTO2SNGPckrCl1XoFlOzMisCwxok8mqGhz6lG0NrgZtsFW8nPQcWgjZCphendEd e9/0DCryoJpHx3lZLLa1Q/rmuMzaF7+GOtZKyHamhTpAl+GbZUdxSDMes72UIP92oI Q9NpIi5pYXPdLFPHc+mMnbRg4afAFCCEUXKk6GQ51MLLU+NOh2ukMKTFjw6MORQswn qKMut1cKcdCieRf0vumxZgxqoJ6ZykAlYDjhEj3suMD1jlG5zxyf8PpqbvHznSM92V B47NPf43vUKkwqMMkfvULdEq7dw6/ZW6DehUcPHZurnUQn/ui0DFUD6RkKILeLpDil lf8Ed0ibbUeow== Date: Wed, 4 Nov 2026 10:40:18 +0100 From: "Oscar Salvador (SUSE)" To: Muchun Song Cc: Oscar Salvador , Andrew Morton , Mike Rapoport , Qi Zheng , Lance Yang , James Houghton , David Hildenbrand , Muchun Song , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 03/12] mm: hugetlb_vmemmap: simplify vmemmap head page handling Message-ID: References: <20261104023510.260766-1-songmuchun@bytedance.com> <20261104023510.260766-4-songmuchun@bytedance.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261104023510.260766-4-songmuchun@bytedance.com> On Wed, Nov 04, 2026 at 10:35:01AM +0800, Muchun Song wrote: > The new head page is already tracked on the vmemmap page list before > remapping starts. Passing it separately gives the remap walker two > ways to refer to the same page and unnecessarily complicates its > interface. > > Use the page list as the single handoff mechanism for the head page, > removing the redundant state from the walker. > > No functional change intended. > > Signed-off-by: Muchun Song > Reviewed-by: Lance Yang > Reviewed-by: Qi Zheng > Reviewed-by: Mike Rapoport (Microsoft) Reviewed-by: Oscar Salvador -- Oscar Salvador SUSE Labs