From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=198.175.65.17 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793751350; b=azwcvpeGcO2fkcpawaRDCH+s7iggkVvnHej1P5Y+fAUJhH5NG020kWH/r1W3oIGIu/rv RerGtavf7M9Hl99W4Q9xz8OGJW4OOsKDCg/zcyUAyLnGzXDY5UvRJMZ+HaGDuEe86TQyK f3xbrhB9SUVnC5msuvpX3zp2tGEQuCewEpf4oeZopxF5TzZZGzIQpxWCl+nQpPg1yIzve uyEND9CWiPzkU+1khULRHXAnvM/trK6gh0VaJOQlyCuD6hFBh8Nej8QpU4ntVKjl72al6 StD00dlmk9j1itsSktlGYbd3rImZmtucEF3ZiVWrsuec9TYQdSp61qXLjWf4qyMEctQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793751350; h=DMARC-Filter:DKIM-Signature:X-CSE-ConnectionGUID:X-CSE-MsgGUID: X-IronPort-AV:X-IronPort-AV:Received:X-CSE-ConnectionGUID: X-CSE-MsgGUID:X-ExtLoop1:X-IronPort-AV:Received:Message-ID:Date: MIME-Version:User-Agent:Subject:To:Cc:References:From: Content-Language:Autocrypt:In-Reply-To:Content-Type: Content-Transfer-Encoding; bh=yupwsl26WPKHnfflgYt0LlJCyAjS9VDdHq3ty55cWYA=; b=KhmZvTuK6nB/fg/ueRWAY1gaN62EFOuSNplhP3dJbesrVVGM8Z9zDncgjdbMgp12judB CeyXvKzREacPDHmBpOQ1EBZQoxI2Jw7Ev1yDaK/pni2Qb30bA3HFfayM6wG4QMFuwsgNx QutyPRkg+Fyoc3+eCggl9UWGzDHwuk2iWWlWto8Vc+QB3hsFv1+Lv3ov5Fu7GZKt/YkAy ElLDoaqcZAMHmPa3XZqOATb6eC6PCEbZ32Pqz1dAWJOQfGaSRrSlXkKD933cD5KC/owj+ Sf/+a/ER742mkpbrKxhXAro5nZVyskbaooEPI2HmiJIfNNQF5SKCL+cuQqKV9G6iQYw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=kqto7lxb; arc=none smtp.remote-ip=198.175.65.17 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 76DEF606A32D for ; Wed, 4 Nov 2026 00:15:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 76DEF606A32D 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, unprotected) header.d=intel.com header.i=@intel.com header.a=rsa-sha256 header.s=Intel header.b=kqto7lxb DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1793751350; x=1825287350; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=yupwsl26WPKHnfflgYt0LlJCyAjS9VDdHq3ty55cWYA=; b=kqto7lxbScHcxPnTjFXLIZYYCwHltuuvW6IddeLTumNBE2cpd8iYyJak es3ohhTr4lJS4/pp9Jx7nLK0VHxGiKtMr+feg5IIS51sslQ8JnHEMd/as CVoMPxN7znFHRKnHBnwvwTd03u1MpV1FFaDfimk1Zz3Hg3w8/KIOruJLk 0anywBfGn6DShez6vHH0bs9ovQ7pynm6mO9YPOJ1Vg0rn0xaklyVkVTL1 xqB0luWcRE9otOxCzs/NjvRCYF2WOUjHP/auBp3IjcJbVTT7A3LJ9SMhE m492adW9q5PquCQvomLLGs4u0Le+2C5lZXhJtucFim46HYwLNGc542fpl Q==; X-CSE-ConnectionGUID: 5QZjKaofTCS3QXRB/bZGwA== X-CSE-MsgGUID: l9LG/hf4RDymbIMLyrcJFw== X-IronPort-AV: E=McAfee;i="6800,10657,11955"; a="2512049" X-IronPort-AV: E=Sophos;i="6.27,194,1787036400"; d="scan'208";a="2512049" Received: from orviesa005.jf.intel.com ([10.64.159.145]) by orvoesa109.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Nov 2026 16:15:49 -0800 X-CSE-ConnectionGUID: SvpQpvFJQNS4i6TP5pDSJw== X-CSE-MsgGUID: ehxL3feYS5iu9ptiVVWgCw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,194,1787036400"; d="scan'208";a="6418120" Received: from rchatre-mobl4.amr.corp.intel.com (HELO [10.125.109.226]) ([10.125.109.226]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Nov 2026 16:15:48 -0800 Message-ID: Date: Tue, 3 Nov 2026 16:15:44 -0800 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 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH v2 0/5] mm/vmscan: adaptive multi-threaded kswapd for NUMA-aware reclaim To: "Ababneh, Ehab" , Barry Song , Shakeel Butt , Johannes Weiner Cc: "ziy@nvidia.com" , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "buddy.lumpkin@oracle.com" , "akpm@linux-foundation.org" , "kasong@tencent.com" , "qi.zheng@linux.dev" , "axelrasmussen@google.com" , "yuanchu@google.com" , "weixugc@google.com" , "david@kernel.org" , "ljs@kernel.org" , "liam@infradead.org" , "vbabka@kernel.org" , "rppt@kernel.org" , "surenb@google.com" , "mhocko@suse.com" , "jackmanb@google.com" , "baoquan.he@linux.dev" , "baolin.wang@linux.alibaba.com" References: 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: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 11/3/26 15:41, Ababneh, Ehab wrote: > I would appreciate your thoughts on how we might achieve a similar > performance improvement without increasing the number of kswapd > threads. It also just plain doesn't seem like folks are very interested in optimizations in this area at the moment. Feedback that's basically, "go optimize something else" would also be very welcome.