From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) (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 8C085A32; Fri, 16 May 2025 15:08:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747408112; cv=none; b=FgWFhpEsamwMUrTlrpf+k2gX93c1OIlxfRzOWCU6CXEK+9rkIMpIQDqZCw790cqZwBLQf0uPboGl9RQvT7/5QzFuUN5ZA1bagJdNdOdrd1d2zBKU8id4movAJGcgOHBpbgxMUKwZ2cTmqSfP4AI7XTq2nbPFdypR7GLrt2OMwuU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747408112; c=relaxed/simple; bh=S1rTemPleZoxFgD2rnwNc3cuHHFApdCRGDenc4n5ltg=; h=Content-Type:Message-ID:Date:MIME-Version:Subject:To:Cc: References:From:In-Reply-To; b=CZC6qO5CAgvEGEerFpTk157oZEChSq9AZax5SjzB7vGy9tLof4vWavG/padihv/1YRr0jLRqeTc5OuEMaiVubz+Z3AvC0h+SZIVSntk/a1wWTiPGQxgSCvEcTpqTyLOBhLrUPQlzE16sjjvwrX6j9F7FXSXuKOQkjFXqYZO6fk8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=aMBisQGl; arc=none smtp.client-ip=198.175.65.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="aMBisQGl" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1747408111; x=1778944111; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to; bh=S1rTemPleZoxFgD2rnwNc3cuHHFApdCRGDenc4n5ltg=; b=aMBisQGl0ex3XzzovVdTYKQHTkAdl0f6Tcs1Nt0gjc6OjE71pb0Cmsua Mk72YQrYzVzUtozdo9gUSdf17XQvCKItf3KaOA9JtyVQC4RgrtYJqXsJc BklmuwgbwInGIMX9yNFRNDlhFwEk5rBiOam7kR4qkGbFi2zIN8Z+Gus+y aNbOxvr9bB0vMZnoucDXoQXycsRg7phTWtbA/QBitZgebzfPbKY/HRTAJ nNJgOVrYQWmrlCy24C1geehVKWxa2/LwZBWnrknJz4AMGpJnqQhst7LG0 TB09ATH4nGNzqrNS4TSRUHE0MwobniQVhry69ps5WRVwA0qwmJfFGVvu9 Q==; X-CSE-ConnectionGUID: mplF9e7MQP60AIdsA2ZW/Q== X-CSE-MsgGUID: wpC6yiW/TDuU4OflxxWX6A== X-IronPort-AV: E=McAfee;i="6700,10204,11435"; a="59613708" X-IronPort-AV: E=Sophos;i="6.15,294,1739865600"; d="scan'208";a="59613708" Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 May 2025 08:08:30 -0700 X-CSE-ConnectionGUID: ArPasoMzSvyin085H2g8Yw== X-CSE-MsgGUID: pYmG387RQTGarcuW6yiTbQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,294,1739865600"; d="scan'208";a="139203982" Received: from vverma7-desk1.amr.corp.intel.com (HELO [10.125.109.57]) ([10.125.109.57]) by fmviesa010-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 May 2025 08:08:28 -0700 Content-Type: multipart/mixed; boundary="------------qrIpUdE0q96cUsCGDhanNjXJ" Message-ID: <6228b588-790a-4bbd-87e6-1bd69f3703c9@intel.com> Date: Fri, 16 May 2025 08:08:25 -0700 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: [PATCHv3 2/4] x86/64/mm: Make SPARSEMEM_VMEMMAP the only memory model To: Ingo Molnar Cc: "Kirill A. Shutemov" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Jonathan Corbet , Andy Lutomirski , Peter Zijlstra , Ard Biesheuvel , Jan Kiszka , Kieran Bingham , Michael Roth , Rick Edgecombe , Brijesh Singh , Sandipan Das , Juergen Gross , Tom Lendacky , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-efi@vger.kernel.org, linux-mm@kvack.org References: <20250516123306.3812286-1-kirill.shutemov@linux.intel.com> <20250516123306.3812286-3-kirill.shutemov@linux.intel.com> <30570ca0-8da4-4ebc-84d6-0a4badfb7154@intel.com> From: Dave Hansen Content-Language: en-US Autocrypt: addr=dave.hansen@intel.com; keydata= xsFNBE6HMP0BEADIMA3XYkQfF3dwHlj58Yjsc4E5y5G67cfbt8dvaUq2fx1lR0K9h1bOI6fC oAiUXvGAOxPDsB/P6UEOISPpLl5IuYsSwAeZGkdQ5g6m1xq7AlDJQZddhr/1DC/nMVa/2BoY 2UnKuZuSBu7lgOE193+7Uks3416N2hTkyKUSNkduyoZ9F5twiBhxPJwPtn/wnch6n5RsoXsb ygOEDxLEsSk/7eyFycjE+btUtAWZtx+HseyaGfqkZK0Z9bT1lsaHecmB203xShwCPT49Blxz VOab8668QpaEOdLGhtvrVYVK7x4skyT3nGWcgDCl5/Vp3TWA4K+IofwvXzX2ON/Mj7aQwf5W iC+3nWC7q0uxKwwsddJ0Nu+dpA/UORQWa1NiAftEoSpk5+nUUi0WE+5DRm0H+TXKBWMGNCFn c6+EKg5zQaa8KqymHcOrSXNPmzJuXvDQ8uj2J8XuzCZfK4uy1+YdIr0yyEMI7mdh4KX50LO1 pmowEqDh7dLShTOif/7UtQYrzYq9cPnjU2ZW4qd5Qz2joSGTG9eCXLz5PRe5SqHxv6ljk8mb ApNuY7bOXO/A7T2j5RwXIlcmssqIjBcxsRRoIbpCwWWGjkYjzYCjgsNFL6rt4OL11OUF37wL QcTl7fbCGv53KfKPdYD5hcbguLKi/aCccJK18ZwNjFhqr4MliQARAQABzUVEYXZpZCBDaHJp c3RvcGhlciBIYW5zZW4gKEludGVsIFdvcmsgQWRkcmVzcykgPGRhdmUuaGFuc2VuQGludGVs LmNvbT7CwXgEEwECACIFAlQ+9J0CGwMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJEGg1 lTBwyZKwLZUP/0dnbhDc229u2u6WtK1s1cSd9WsflGXGagkR6liJ4um3XCfYWDHvIdkHYC1t MNcVHFBwmQkawxsYvgO8kXT3SaFZe4ISfB4K4CL2qp4JO+nJdlFUbZI7cz/Td9z8nHjMcWYF IQuTsWOLs/LBMTs+ANumibtw6UkiGVD3dfHJAOPNApjVr+M0P/lVmTeP8w0uVcd2syiaU5jB aht9CYATn+ytFGWZnBEEQFnqcibIaOrmoBLu2b3fKJEd8Jp7NHDSIdrvrMjYynmc6sZKUqH2 I1qOevaa8jUg7wlLJAWGfIqnu85kkqrVOkbNbk4TPub7VOqA6qG5GCNEIv6ZY7HLYd/vAkVY E8Plzq/NwLAuOWxvGrOl7OPuwVeR4hBDfcrNb990MFPpjGgACzAZyjdmYoMu8j3/MAEW4P0z F5+EYJAOZ+z212y1pchNNauehORXgjrNKsZwxwKpPY9qb84E3O9KYpwfATsqOoQ6tTgr+1BR CCwP712H+E9U5HJ0iibN/CDZFVPL1bRerHziuwuQuvE0qWg0+0SChFe9oq0KAwEkVs6ZDMB2 P16MieEEQ6StQRlvy2YBv80L1TMl3T90Bo1UUn6ARXEpcbFE0/aORH/jEXcRteb+vuik5UGY 5TsyLYdPur3TXm7XDBdmmyQVJjnJKYK9AQxj95KlXLVO38lczsFNBFRjzmoBEACyAxbvUEhd GDGNg0JhDdezyTdN8C9BFsdxyTLnSH31NRiyp1QtuxvcqGZjb2trDVuCbIzRrgMZLVgo3upr MIOx1CXEgmn23Zhh0EpdVHM8IKx9Z7V0r+rrpRWFE8/wQZngKYVi49PGoZj50ZEifEJ5qn/H Nsp2+Y+bTUjDdgWMATg9DiFMyv8fvoqgNsNyrrZTnSgoLzdxr89FGHZCoSoAK8gfgFHuO54B lI8QOfPDG9WDPJ66HCodjTlBEr/Cwq6GruxS5i2Y33YVqxvFvDa1tUtl+iJ2SWKS9kCai2DR 3BwVONJEYSDQaven/EHMlY1q8Vln3lGPsS11vSUK3QcNJjmrgYxH5KsVsf6PNRj9mp8Z1kIG qjRx08+nnyStWC0gZH6NrYyS9rpqH3j+hA2WcI7De51L4Rv9pFwzp161mvtc6eC/GxaiUGuH BNAVP0PY0fqvIC68p3rLIAW3f97uv4ce2RSQ7LbsPsimOeCo/5vgS6YQsj83E+AipPr09Caj 0hloj+hFoqiticNpmsxdWKoOsV0PftcQvBCCYuhKbZV9s5hjt9qn8CE86A5g5KqDf83Fxqm/ vXKgHNFHE5zgXGZnrmaf6resQzbvJHO0Fb0CcIohzrpPaL3YepcLDoCCgElGMGQjdCcSQ+Ci FCRl0Bvyj1YZUql+ZkptgGjikQARAQABwsFfBBgBAgAJBQJUY85qAhsMAAoJEGg1lTBwyZKw l4IQAIKHs/9po4spZDFyfDjunimEhVHqlUt7ggR1Hsl/tkvTSze8pI1P6dGp2XW6AnH1iayn yRcoyT0ZJ+Zmm4xAH1zqKjWplzqdb/dO28qk0bPso8+1oPO8oDhLm1+tY+cOvufXkBTm+whm +AyNTjaCRt6aSMnA/QHVGSJ8grrTJCoACVNhnXg/R0g90g8iV8Q+IBZyDkG0tBThaDdw1B2l asInUTeb9EiVfL/Zjdg5VWiF9LL7iS+9hTeVdR09vThQ/DhVbCNxVk+DtyBHsjOKifrVsYep WpRGBIAu3bK8eXtyvrw1igWTNs2wazJ71+0z2jMzbclKAyRHKU9JdN6Hkkgr2nPb561yjcB8 sIq1pFXKyO+nKy6SZYxOvHxCcjk2fkw6UmPU6/j/nQlj2lfOAgNVKuDLothIxzi8pndB8Jju KktE5HJqUUMXePkAYIxEQ0mMc8Po7tuXdejgPMwgP7x65xtfEqI0RuzbUioFltsp1jUaRwQZ MTsCeQDdjpgHsj+P2ZDeEKCbma4m6Ez/YWs4+zDm1X8uZDkZcfQlD9NldbKDJEXLIjYWo1PH hYepSffIWPyvBMBTW2W5FRjJ4vLRrJSUoEfJuPQ3vW9Y73foyo/qFoURHO48AinGPZ7PC7TF vUaNOTjKedrqHkaOcqB185ahG2had0xnFsDPlx5y In-Reply-To: This is a multi-part message in MIME format. --------------qrIpUdE0q96cUsCGDhanNjXJ Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 5/16/25 07:59, Dave Hansen wrote: > The only option would be to make them static when using non-vmemmap > sparsemem. But that's new-ish, and probably won't get any testing. Something like this. But I don't particularly like it. --------------qrIpUdE0q96cUsCGDhanNjXJ Content-Type: text/x-patch; charset=UTF-8; name="static-sparsemem-0.patch" Content-Disposition: attachment; filename="static-sparsemem-0.patch" Content-Transfer-Encoding: base64 CgotLS0KCiBiL2FyY2gveDg2L2luY2x1ZGUvYXNtL3NwYXJzZW1lbS5oIHwgICAgNCArKysr CiAxIGZpbGUgY2hhbmdlZCwgNCBpbnNlcnRpb25zKCspCgpkaWZmIC1wdU4gYXJjaC94ODYv aW5jbHVkZS9hc20vc3BhcnNlbWVtLmh+c3RhdGljLXNwYXJzZW1lbS0wIGFyY2gveDg2L2lu Y2x1ZGUvYXNtL3NwYXJzZW1lbS5oCi0tLSBhL2FyY2gveDg2L2luY2x1ZGUvYXNtL3NwYXJz ZW1lbS5ofnN0YXRpYy1zcGFyc2VtZW0tMAkyMDI1LTA1LTE2IDA4OjA1OjE5LjAwNjE1MDEz OSAtMDcwMAorKysgYi9hcmNoL3g4Ni9pbmNsdWRlL2FzbS9zcGFyc2VtZW0uaAkyMDI1LTA1 LTE2IDA4OjA3OjE0LjUxNzE4OTAyNCAtMDcwMApAQCAtMjYsNyArMjYsMTEgQEAKICMgZW5k aWYKICNlbHNlIC8qIENPTkZJR19YODZfMzIgKi8KICMgZGVmaW5lIFNFQ1RJT05fU0laRV9C SVRTCTI3IC8qIG1hdHQgLSAxMjggaXMgY29udmVuaWVudCByaWdodCBub3cgKi8KKyNpZmRl ZiBDT05GSUdfU1BBUlNFTUVNX1ZNRU1NQVAKICMgZGVmaW5lIE1BWF9QSFlTTUVNX0JJVFMJ KHBndGFibGVfbDVfZW5hYmxlZCgpID8gNTIgOiA0NikKKyMgZWxzZQorIyBkZWZpbmUgTUFY X1BIWVNNRU1fQklUUwk0NgorIyBlbmRpZgogI2VuZGlmCiAKICNlbmRpZiAvKiBDT05GSUdf U1BBUlNFTUVNICovCl8K --------------qrIpUdE0q96cUsCGDhanNjXJ--