From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6C0D1C30658 for ; Tue, 2 Jul 2024 18:39:04 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id CD40E6B0082; Tue, 2 Jul 2024 14:39:03 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id C5B026B0093; Tue, 2 Jul 2024 14:39:03 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id AADFE6B0095; Tue, 2 Jul 2024 14:39:03 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 8AB316B0082 for ; Tue, 2 Jul 2024 14:39:03 -0400 (EDT) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id F362280461 for ; Tue, 2 Jul 2024 18:39:02 +0000 (UTC) X-FDA: 82295674524.10.AF5572A Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.14]) by imf12.hostedemail.com (Postfix) with ESMTP id 1732B40008 for ; Tue, 2 Jul 2024 18:38:59 +0000 (UTC) Authentication-Results: imf12.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=csYKNNFn; dmarc=pass (policy=none) header.from=intel.com; spf=pass (imf12.hostedemail.com: domain of dave.hansen@intel.com designates 192.198.163.14 as permitted sender) smtp.mailfrom=dave.hansen@intel.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1719945523; a=rsa-sha256; cv=none; b=g8sxyEYjsFHjyYtr3V53v1a28Q+pTCuJuAcgWEk4xELcw1dWaM2RaGIwwH7TkL6gAWX+Fv ZpStaG4+f/Uxf7709AbaV7MhEmka0BzW1OrUGjRc4WamtbfTwh7wBkkb9zKBLse3vig20s rd3hXTu5HVfA9mG605E/WibfuTVflBU= ARC-Authentication-Results: i=1; imf12.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=csYKNNFn; dmarc=pass (policy=none) header.from=intel.com; spf=pass (imf12.hostedemail.com: domain of dave.hansen@intel.com designates 192.198.163.14 as permitted sender) smtp.mailfrom=dave.hansen@intel.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1719945523; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=4/GUNG3Y4j1TGtq6GgqK2V0mymE2xfP76n18uSguDBM=; b=LI9PiUYCFPKvzIXK46KHjcQOpoYp97uHmNU0vAuaDdrfrrhh6uyeRxectJLkFi6esa6XtR ILjtd3pk9u9eduqtw06hDbA7WmC/QyrT7Bb7OgCgDkpHL/IpKyzDH7Z5saj+F8gBL7okdN /qK8UpKyYVPvUG2BeaAMW2eyhYX8aBw= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1719945540; x=1751481540; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=XrpZFXu0nimDRwuk1bHAjEFdzs44HSnMLPOqMDjawSI=; b=csYKNNFnqFntRu9u7Y0l0LtBBSaK7xDpoRwCDaWlOwtosifwtYJfAho7 QtamkhxL3uFaN3cELeXlwTMihrzhDBm5+tgV0oU3In4C9K4B8Vv7Hzvzi GSafs3ZLh5iZQjxov4AbLtosYTw88lYq+aTnBEmLFYL5PeAiaOujxYRws vMACXELldmEVtT4HuGANE9XELZvHiY0OpR7XRWyo+pS+pL3KjWAkmGLnU j6VTvRxhl44qhUgwitfHB/uXIu/UOC6UNMoTJtvNnSxtYVT7WPrlg8Uyn 3GdTvxj+mrqqs1QBQZBNRgRzOwadzrXwky9+WdrHMkFqT+2mFgpSEcnr8 Q==; X-CSE-ConnectionGUID: FTFzErUzStiayVaeFn4teg== X-CSE-MsgGUID: m5ywKa7AS3iX2Zv6Y9hR+Q== X-IronPort-AV: E=McAfee;i="6700,10204,11121"; a="17352700" X-IronPort-AV: E=Sophos;i="6.09,180,1716274800"; d="scan'208";a="17352700" Received: from fmviesa005.fm.intel.com ([10.60.135.145]) by fmvoesa108.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Jul 2024 11:38:58 -0700 X-CSE-ConnectionGUID: VrG/A0RQQxG0GrOHo2ZUtA== X-CSE-MsgGUID: ZM6K/kPnSu+OZnWYBPHi6A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.09,180,1716274800"; d="scan'208";a="50449020" Received: from kinlongk-desk.amr.corp.intel.com (HELO [10.125.111.129]) ([10.125.111.129]) by fmviesa005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Jul 2024 11:38:54 -0700 Message-ID: <9c8a139e-9e20-4f39-b750-fa390a8a745a@intel.com> Date: Tue, 2 Jul 2024 11:38:53 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RESEND PATCH v3 0/3] x86/mm: LAM fixups and cleanups To: Andrew Morton , Yosry Ahmed Cc: x86@kernel.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Andy Lutomirski , Peter Zijlstra , "Kirill A. Shutemov" , Rick Edgecombe , linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20240702132139.3332013-1-yosryahmed@google.com> <20240702103628.61879ef17b9b01305515c634@linux-foundation.org> <20240702113554.2471f000055f3c717fced4f5@linux-foundation.org> 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: <20240702113554.2471f000055f3c717fced4f5@linux-foundation.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 1732B40008 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: yy895odxjumn6ndwryxfu8kkcjw1gaj5 X-HE-Tag: 1719945539-15698 X-HE-Meta: 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 Mr1/tl3U YD2i3gT2G3gts8R/8xSxYtPaxxv0fbsPhpwg77VX+F+VylZ4uM8P4u9lF0zSbELhBVT/yf89xzpbBMRzNg6dnvFh3kQ86E3kb/uoHmDmD53FBQ+kRRGMxJIydGuA/jy655M+dn81WywQcCTzMZOZESTSLvgIpP1czKHy9x4LxR0EXrLGfoo/6/DuIeA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 7/2/24 11:35, Andrew Morton wrote: > But when people run older (or current) kernels on newer hardware, they > will hit this. So a backport to cover 82721d8b25d7 ("x86/mm: Handle > LAM on context switch") is needed. > > The series doesn't seem to be getting much traction so I can add it to > mm.git's mm-unstable branch for wider testing, but it's clearly an x86 > tree thing. I was really hoping Andy L would look at this since he suggested this whole thing really. I completely agree that this needs some wider testing. How about I pull it into x86/mm so it gets some linux-next testing instead of having it in mm-unstable? Maybe it'll also attract Andy's attention once it's in there.