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 8A10EC43458 for ; Fri, 10 Jul 2026 11:13:09 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 720D46B009D; Fri, 10 Jul 2026 07:13:08 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 6D10E6B009F; Fri, 10 Jul 2026 07:13:08 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5E7146B00A0; Fri, 10 Jul 2026 07:13:08 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 3BE4C6B009D for ; Fri, 10 Jul 2026 07:13:08 -0400 (EDT) Received: from smtpin01.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay04.hostedemail.com (Postfix) with ESMTP id D06C61A0405 for ; Fri, 10 Jul 2026 11:13:07 +0000 (UTC) X-FDA: 84972605214.01.D596A9B Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf11.hostedemail.com (Postfix) with ESMTP id 1B0994000A for ; Fri, 10 Jul 2026 11:13:05 +0000 (UTC) Authentication-Results: imf11.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=eypDgINp; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf11.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 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=1783681986; 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=rZb7/pxxnbIVqETA1OR+i/G8TlRTT+kWkE9kl8/ZZJs=; b=1OXr/EmfbeD919rx0a5M3639FVy9kAwV9RUSAxQYfqiTQ7gfXBAXEjxDKy2Qx8+VZRo61q dLIsrZdbh5rUpWznLBh3cR0Kq8OQdnK/MzHQhWKinPUuRsCMCybk30N/MnwKcUhcROJ8jo nI0txQ/KVXf7Lv2lOrP+MX//G9x4kZU= ARC-Authentication-Results: i=1; imf11.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b=eypDgINp; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf11.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1783681986; b=uMbwLtJBktG32WO6fqAo6L2QtaOSwJvWFfjWTlY9CkJqN412JKYsWgNAN659eEDbgHG8x6 koKTvmk4dMr4+WIzP8xbfb5QLsqle4YYC9ty+kVpaEk5KOBzlWAfwVD70x9k7b5059O2v3 KAe6yrxCCAubJov3B284zGnABHgnc7I= Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 50A6E408A8; Fri, 10 Jul 2026 11:13:05 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EEE811F000E9; Fri, 10 Jul 2026 11:13:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783681985; bh=rZb7/pxxnbIVqETA1OR+i/G8TlRTT+kWkE9kl8/ZZJs=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=eypDgINp0YdZSkwT6QCh0FbLMJo85+mqtUroPW/6IRw22kqEQ2ySxdu4J8QOfr0g7 EZzmELJ7RVhIYkkdmP+ofS9JM3ph5iB2q9bdqlTRsJaJHmxj7Acw5izjDSjjeC4+7I PeI8qNFGgv1uQV9DbviVpHveHPVFlGD17PwtTHdEHZ0+TyxYVb5Vvl9C+fugqk7Y+b GLIytksWVWA9VN9DFFYdryepbQuAbqn89bLIsO0Gk0s7QmgEPBjUI1Di+4Y3JxeRVT aFSfUCtIbGOdF9q+Hu5QEMW6O6GleavmbtzR/LxLjHuntxhYIgKkdgF5OmY1b5Nsty PfSvPYt42OYDw== Message-ID: <75cfd24a-1372-4c55-9e1c-a3ac374c1011@kernel.org> Date: Fri, 10 Jul 2026 13:12:59 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] selftests/mm: remove obsolete hugetlb vmemmap test To: Muchun Song , Andrew Morton , Shuah Khan Cc: Lorenzo Stoakes , "Liam R . Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, muchun.song@linux.dev References: <20260710092427.3459121-1-songmuchun@bytedance.com> 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: <20260710092427.3459121-1-songmuchun@bytedance.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 1B0994000A X-Stat-Signature: odoci6dywpynrcuzz96xigjqghcn7trs X-HE-Tag: 1783681985-223113 X-HE-Meta: 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 AufU8A2F ekn3LHfI4XPYp3EKegO4MESlipiuTCYMJOgQbBwiqnfKfs6c5fJvlYn26ZXg3eWzFgK8Wd1G4riF5aUgsj8W4CAScsq37ixKDapJCeN2CWckSJ+sBmfx+ibkSYrkZHFAckSMMyakmOlMEZQ0biKzdT/RdbrXokycznuG3xqO5CycxcyST7J9wE8QcH0UcxL7kviyzq62dJjlrL5M5iOTHIRPdwE2yzYJi2QD3gDIuT0Ov9rEHuk7eO8TN4uqpgUj6/zEkMOp6VlidmbrqOx/41ancw+1lTAzjPVFDPeAtK04VkTXRyo/1H2j75Q== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 7/10/26 11:24, Muchun Song wrote: > The hugetlb vmemmap selftest was added to check the old HVO > layout where tail vmemmap pages reused the head page. That > assumption no longer matches the current HVO mapping layout. > > HVO now keeps a private backing page for the head vmemmap page > and remaps redundant tail vmemmap pages to a shared read-only > backing page. The old page flag check is therefore testing an > obsolete implementation detail rather than the current ABI or > behavior. > > Remove the stale test and its build, run, and ignore entries. > > Signed-off-by: Muchun Song > --- Acked-by: David Hildenbrand (Arm) -- Cheers, David