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]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CFE0DCD3423 for ; Fri, 1 May 2026 18:02:39 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 3EBE56B0092; Fri, 1 May 2026 14:02:39 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3C4696B0093; Fri, 1 May 2026 14:02:39 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2DA696B0095; Fri, 1 May 2026 14:02:39 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id 1C50E6B0092 for ; Fri, 1 May 2026 14:02:39 -0400 (EDT) Received: from smtpin18.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay06.hostedemail.com (Postfix) with ESMTP id A4ECE1C0100 for ; Fri, 1 May 2026 18:02:38 +0000 (UTC) X-FDA: 84719621196.18.471F66E Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf18.hostedemail.com (Postfix) with ESMTP id BD9271C0016 for ; Fri, 1 May 2026 18:02:36 +0000 (UTC) Authentication-Results: imf18.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=uuYupSW5; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf18.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1777658556; 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=lKq61IVZIm4Yb02QDgIwH+SIALvyu9Q+/uRuFATbUsI=; b=N0jdJnldxm0AyNEcrs9/X/2DIQlCy8+5BtzT4ti1Fjs56Kx2oj4zoqqVMhO0bVfdKy/Gc5 9/WPUD/lIlPcYr8NEDmudWra/hcJvwVYl0bKH12Gn0IFXR/eWQtiJJvKGWYY/LjLCgsiSQ 8r2CcPUWPR80D/3IMyqqrRq2uXFjnN8= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1777658556; a=rsa-sha256; cv=none; b=5LNhOZ6GN6lSfmFPyQDbWYhBJqZZoebpU2tSaUZkgA7FPAwcrkF5HBbyTqGC9SvBPjiYng dUbieElthfnohOm6iv1vYJLxdjl1+1xUQqMofGP0KpPxm3CI2uZY1CdQWhrlzH/jAHGUvx v5b9VOmWI5i6yud51aY3r+s3x7dHrPQ= ARC-Authentication-Results: i=1; imf18.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=uuYupSW5; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf18.hostedemail.com: domain of david@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=david@kernel.org Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 069C0600CB; Fri, 1 May 2026 18:02:36 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 41920C2BCB4; Fri, 1 May 2026 18:02:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777658555; bh=cISpscXftIVW35927MGW1f/hoEuL3QHhaFwXy0DNSo0=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=uuYupSW5k2LpfC9iWHYvQnjtXdPplnUCS4zZH0iwWWj2qk6KRSbIdEP64j2gjsR5E PxTGZOGIG0K6SOQOGUJxZTd+XoNb519TwLS2rXPgryJntDsNBFzVvkdY4Kc6PPlDXp JSyIzbmPfu8Kkk0QLjDLn0hg9bjkW9LYdr4By3XdsBrTB1mQ2w0koM1pUaAPNLGo2+ 4cQ8T4v65CG0S1sSi53Ze4TrNiw2ZkH7LdqQh6CBwtpok6NDcZRMBwH1T8LDxfIKlE 9G1clGJsPsd7PH/6rDTvsKZaZIIvUYuHBMrsXq8zeJV809CyXf61ox18x0jZ2EuVr5 BD5sIVaRbCo9Q== Message-ID: <01ea8acf-69ee-404e-8785-59fb0a527253@kernel.org> Date: Fri, 1 May 2026 20:02:28 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [LSF/MM/BPF TOPIC] 64k (or 16k) base page size on x86 To: Kiryl Shutsemau , lsf-pc@lists.linux-foundation.org, linux-mm@kvack.org Cc: x86@kernel.org, linux-kernel@vger.kernel.org, Andrew Morton , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , Lorenzo Stoakes , "Liam R. Howlett" , Mike Rapoport , Matthew Wilcox , Johannes Weiner , Usama Arif References: From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: BD9271C0016 X-Stat-Signature: ie5cyqqt4h7n1w8rbdwdztusd1cxzz4h X-Rspam-User: X-HE-Tag: 1777658556-741266 X-HE-Meta: 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 rdsKPNzH QHUJEMhgx34ZdrnTgAJmgjxaub/NKWaRmAQ+BW7dtFP2E0kQX57Fp2HazVJVmQQaw+E7VgNMuGwQpoKRnzMB8w+7nYhr4ZE8FyY0DrZffDr7hqkY3tzSWireCo/vExAm9oE+VfVol9POfFSEXb/4eBxn5Cw/fERvkoqWu+vKg2W3kxv01ptRQpDk5oGs0/onway/0HxNEkZzfsUQ4qZHcLgj34kXgr548NheExyxjD44LJRtCAC5T3sltgUUCpLNIWDXnhaP62eYGwT2gnm/mueiPOQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 5/1/26 20:00, Kiryl Shutsemau wrote: > On Thu, Feb 19, 2026 at 03:08:58PM +0000, Kiryl Shutsemau wrote: >> == Status == >> >> I have a POC implementation on top of v6.17: >> >> git://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git pte_size > > Just a heads up. > > I've updated the tree. It is on top of v7.0 now. > > I can boot my VM fully (not only to shell as before) on all three page > size 4k, 16k and 64k. And it doesn't crash immediately. > > Page fault handler is the most challenging part of the design. I wanted > to flash it out to RFC quality before the summit, but it is not there > yet. But it started getting a shape. > > Volume of the code changes makes it hard to deal with the patchset: > > 1530 files changed, 12675 insertions(+), 8669 deletions(-) I think you know the answer already :P -- Cheers, David