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 41680C55ABF for ; Thu, 6 Aug 2026 13:21:03 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 3015C6B008A; Thu, 6 Aug 2026 09:21:02 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 28AF66B0092; Thu, 6 Aug 2026 09:21:02 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 152916B0093; Thu, 6 Aug 2026 09:21:02 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id DC7B66B008A for ; Thu, 6 Aug 2026 09:21:01 -0400 (EDT) Received: from smtpin05.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 82CDA160787 for ; Thu, 6 Aug 2026 13:21:01 +0000 (UTC) X-FDA: 85070905122.05.3D7CC47 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf09.hostedemail.com (Postfix) with ESMTP id B12DD14000D for ; Thu, 6 Aug 2026 13:20:59 +0000 (UTC) Authentication-Results: imf09.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b="hAv/gKVT"; spf=pass (imf09.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1786022459; 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=9M22hpR37Fywe1zZz1y9yAYVc4M0MHck+1iq8vIWd3Y=; b=NodkqL8Z2vWl8TB//13GO/PJEGXPZ9EZ/vqYaOdg17RH1RAKgtE253FbombMX5t49QswjA kDxeluFU88wIcgLhld25ZHamWtuiVKZAZd05LfcvEq3cFvx73QFU/AWdyuE3KgiGFlH07s I0fFgfCMSBj5mKo02H9q3/qDlox3AEg= ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1786022459; b=cICltCnip+ZCvRLg+FAsWQvS6iUqHC/mQUkKm7xBojDIHhKquHQ+SDuqt6uPtmsV/FTKMV kGja4PEQYU1WdLwixy9KOB1g7GJSY3yv4zGeAB4miML6NDfigaqjY1zSIxdIM3RAbv2rMQ 7kmrWRrmzZ98Q6OKeZfeINVohG4j1ds= ARC-Authentication-Results: i=1; imf09.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20260515 header.b="hAv/gKVT"; spf=pass (imf09.hostedemail.com: domain of david@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=david@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 9053941468; Thu, 6 Aug 2026 13:20:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CC3E01F00A3A; Thu, 6 Aug 2026 13:20:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1786022458; bh=9M22hpR37Fywe1zZz1y9yAYVc4M0MHck+1iq8vIWd3Y=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=hAv/gKVTNnWOwNy0eCGclNrpJrUejSmX/wq5ebyMntr2wjyTpm5EUABDroL8KrD41 p6/V1ny8qs3CeeMRlvgOFd5/btgg2ICqTVgg8NvHRe6cQwnMw/74Ww6uG1AxOa68XW mfw/FK5BTxZCdpeMvXONqZ3mT6ELG/HbiVhMVh5JfgLSF740EtEs0eEKdMsc90UKd+ HcM5kYWuGmYeEqWBDPik6P76THWeMTlfV1MLZFaGhUTVorjPkH0fOiFdIcm9DawxVH XZlCZyRYyCZzpjwrAi6QX47WdGy5fZRaXw/P2psZK2LXBsjaIN+ww1zP3lXMFrZssq NjA4IxsryEcrw== Message-ID: Date: Thu, 6 Aug 2026 15:20:48 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/4] mm/huge_memory: skip zone device folios in madvise_free_huge_pmd() To: Gregory Price , linux-mm@kvack.org Cc: damon@lists.linux.dev, linux-kernel@vger.kernel.org, kernel-team@meta.com, sj@kernel.org, akpm@linux-foundation.org, ljs@kernel.org, ziy@nvidia.com, baolin.wang@linux.alibaba.com, liam@infradead.org, npache@redhat.com, ryan.roberts@arm.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, usama.arif@linux.dev, vbabka@kernel.org, jannh@google.com, matthew.brost@intel.com, joshua.hahnjy@gmail.com, rakie.kim@sk.com, byungchul@sk.com, ying.huang@linux.alibaba.com, apopple@nvidia.com, stable@vger.kernel.org References: <20260728194714.3713735-1-gourry@gourry.net> <20260728194714.3713735-3-gourry@gourry.net> 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: <20260728194714.3713735-3-gourry@gourry.net> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam07 X-Rspam-User: X-Stat-Signature: mykr7fb35ix3nejo9g7kjfo3h7u8hjko X-Rspamd-Queue-Id: B12DD14000D X-HE-Tag: 1786022459-90685 X-HE-Meta: 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 xUOs14Xg YeJGTSKEID1hVyGOoYEpZaMjtw9Xlxw2Jl+9WxV3FhZPW8uapDtMI2sSTcxom9/1QBleT2h25bxCEGtDpawF6oxkJpPokRgUvPmgV+3msMMH1iXn+0itHDrCuy4HBg5edScs3WHf4GuldpDrFSWYkT9P/vtRJzTkE4Ir+B0GGSex7HYduALbz+qaFFNMZo4OVJP6pxFMQT2FWKIAvP/UKggcFpJ19JAmpZjip9z5+LajC+krvRNGNwZ+AvpnyzTJQcFhoOimDOvLqQ0fKI7PXoEaueqaWBZ1O1vF5ev3hozTgbjvw1K7JdwOFn9Rg7F7U/s/mQ5UZvUqwDYexXj96ObUMh5z+hqJ29hfI/QXxGaJw7blUkfETfc8USz2N9BhLsr7LOrGDNHVCgkgDAEi5n+gLjiUlVlAJdnWvAooSoz5bod4q64PLAFRvrGbf75O4bdXexL1iq58gYlWSoEx4vg5E0BFZEBKr4qIYI2XWCWkCMAY= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 7/28/26 21:47, Gregory Price wrote: > madvise_free_huge_pmd() resolves the folio backing a PMD via pmd_folio() > and marks it lazyfree without checking for zone device memory. > > The surrounding guards do not cover every zone device case: > - MADV_FREE only operates on anonymous VMAs (DAX mappings are excluded) > > - !pmd_present() branch rejects device-private and migration entries > > - present zone device PMD (device coherent THP) is not filtered. > Unlike vm_normal_page_pmd(), it performs no special/pfnmap check, > and would be marked lazyfree here. > > Bail out when the folio is a zone device folio. > > Fixes: 368076f52ebe ("mm/huge_memory: add device-private THP support to PMD operations") > Cc: > Signed-off-by: Gregory Price (Meta) > --- Acked-by: David Hildenbrand (Arm) -- Cheers, David