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 B884DC31D97 for ; Thu, 4 Jul 2024 11:03:31 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 44D4B6B00B2; Thu, 4 Jul 2024 07:03:31 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3FD8D6B00B3; Thu, 4 Jul 2024 07:03:31 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 29E316B00B4; Thu, 4 Jul 2024 07:03:31 -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 071006B00B2 for ; Thu, 4 Jul 2024 07:03:31 -0400 (EDT) Received: from smtpin18.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 9890E16119D for ; Thu, 4 Jul 2024 11:03:30 +0000 (UTC) X-FDA: 82301784180.18.7D53719 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by imf13.hostedemail.com (Postfix) with ESMTP id 49E742002C for ; Thu, 4 Jul 2024 11:03:28 +0000 (UTC) Authentication-Results: imf13.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=Kdh08mQs; spf=pass (imf13.hostedemail.com: domain of david@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=none) header.from=redhat.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1720090983; 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=kcmL/mrLNsxTT6n6Hb+CZD8jZbqOQDIm2w5SdDNo5UM=; b=OgNICYhdcbwj9vHF+px8kx49ws6B5UYUWyGz8R3JnbxkEkd2vV0qU79G+xFrUKNFo3zYIP CCZGM0q6uPUQR1FtvHF6815SJ6lRT1ALW4Uz7dAOBcscmuoVeZBYdN1R4Qk9tAVNF15M/L Z3P/uevBnPGK4zf2RlOhiuXi0iNWCEU= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1720090983; a=rsa-sha256; cv=none; b=b08qPkT3HGlfWFgEDToMxEmbFdY74xIm7xZfSTrxJv7TeENmStmxA8yKG1BjAMvKY90Lok utyvHtayCLlEBIC8ro8tg9g8KViJgUsX7P3d+elLbBDKYh/GiNSF7GyayFnmixicmMGXnT Vs4L2Rp5P/VokQGNxAmThq0LEAtXixY= ARC-Authentication-Results: i=1; imf13.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=Kdh08mQs; spf=pass (imf13.hostedemail.com: domain of david@redhat.com designates 170.10.133.124 as permitted sender) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=none) header.from=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1720091007; h=from:from: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:autocrypt:autocrypt; bh=kcmL/mrLNsxTT6n6Hb+CZD8jZbqOQDIm2w5SdDNo5UM=; b=Kdh08mQsFsXqlHq5+A3U9JrVygChswW0A4WBVeSoMNQxKQcaZqLPOx50Aa76zJKlbXwSW5 5BPzJg9U5+zF/h3+qiiWSaVpivDj1La1TDXY5RXW6RbEUwhzVENh2sYU8oUvbfbsGQp87v qhUryoFygvfKSwbRYZNT4gomECl/Mzs= Received: from mail-ej1-f71.google.com (mail-ej1-f71.google.com [209.85.218.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-84-ZPbF-ieQNl2WiVjUu-nAxg-1; Thu, 04 Jul 2024 07:03:26 -0400 X-MC-Unique: ZPbF-ieQNl2WiVjUu-nAxg-1 Received: by mail-ej1-f71.google.com with SMTP id a640c23a62f3a-a725b0f8ba9so21461266b.2 for ; Thu, 04 Jul 2024 04:03:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720091005; x=1720695805; h=content-transfer-encoding:in-reply-to:organization:autocrypt:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=kcmL/mrLNsxTT6n6Hb+CZD8jZbqOQDIm2w5SdDNo5UM=; b=B3hK2WcYXlYVOMjB7Ab/htyKngOvhrCMw/uCr7DwtVbqHjZxazpZo+ckQLGB8OVvQl 1yc2JBhzyw0kVoz6d9kCKNbJLDy0W4C4l4K6qZqsXkgaT0DGAKtdYQkMCpbOdEOxNnZP JP7apKx2kUj4AszI2e0WuinDbcV/X+gKABzUzMoItCe1lEfvrmUFslCSkPI9K89rGc9l 3Ewks6yRvY54J2mAwYEB3XrpIzYlmjjpJBJNb/EBvPFA9Wwma1IqjpjqfFon4DS+hgv5 R2p964CuwABZ+UyjdPLPLUIDHXc2ITu0ZbNeJreQfg1ZNVeLwOXh/ZFTDxugKu9tb0nh 6uOA== X-Forwarded-Encrypted: i=1; AJvYcCXucEPT0qxOY7hT5IIU1Svz1uTnr4+FBfCIgF4PYzsSDDNCsEWYjcGcH76LNLw9/YGm5z+b/+fThCjQRSzZkho5+rE= X-Gm-Message-State: AOJu0YxG8yGtfg0d8wN3y/vC0+2OHhjUOxKlaxS/x/7p27uK0N2+qKBM R+pd+qr9BCxCF0ZsegG6WVwOCjGgLiQjmhZH2Vf0E2YcO8/bPB20bEPfRj2inM855/ZXyNTDODc MoKvm+U1vJGkjyNqwOjV7xPSvtqPAnr3uW71+UQx0pJsu8/Cz X-Received: by 2002:a05:6402:90e:b0:58e:2f7c:a9c with SMTP id 4fb4d7f45d1cf-58e5b898cd6mr1205854a12.26.1720091004952; Thu, 04 Jul 2024 04:03:24 -0700 (PDT) X-Google-Smtp-Source: AGHT+IFQgKgodoPJSGVW4RqEd5iqAxJe31G23OyfS/FhV1XLA8+nmZgcUalxd1NjddlxvQvjlHZOgQ== X-Received: by 2002:a05:6402:90e:b0:58e:2f7c:a9c with SMTP id 4fb4d7f45d1cf-58e5b898cd6mr1205774a12.26.1720091003581; Thu, 04 Jul 2024 04:03:23 -0700 (PDT) Received: from ?IPV6:2003:cb:c715:8600:f05d:97b6:fb98:2bc1? (p200300cbc7158600f05d97b6fb982bc1.dip0.t-ipconnect.de. [2003:cb:c715:8600:f05d:97b6:fb98:2bc1]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a754762826dsm199128966b.76.2024.07.04.04.03.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 04 Jul 2024 04:03:23 -0700 (PDT) Message-ID: Date: Thu, 4 Jul 2024 13:03:22 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 28/45] mm/damon: Enable damon_mkold_pmd_entry to handle hugetlb vmas To: Oscar Salvador , Andrew Morton Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Peter Xu , Muchun Song , SeongJae Park , Miaohe Lin , Michal Hocko , Matthew Wilcox , Christophe Leroy References: <20240704043132.28501-1-osalvador@suse.de> <20240704043132.28501-29-osalvador@suse.de> From: David Hildenbrand Autocrypt: addr=david@redhat.com; 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 B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: <20240704043132.28501-29-osalvador@suse.de> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Stat-Signature: rddai8c6jrhf4urwsgxxgbopb71yozfi X-Rspamd-Queue-Id: 49E742002C X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1720091008-943409 X-HE-Meta: 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 qDmZI1In Nsxf0AmXHUX3vHONayZK8ibWLxIFK6Lh/NMip9f3CxoNUHLGXOAkwm0tr6e7x4jKeWqEUHfx8tcPf0L32tWcDO+y/l82qOMoDTwzNxatNbfKUhs4P0r9a7cN12fBBnaYdzeSZ8R8HlM3xLj7k7Zv6uZbm1+ZpJd6QAVGkCBaULllO05/g2mUO0sHBgaXmyLh4OKwdLYdSVOtci3+VcrrJBMnSAp5zolAPhD5/MOfDB8R5Dz516fiHktkrvcy0cLDxbsExwOhHxzsr4NJkKTRwrcfEpU+Q4oAMfjpMwlNMdsMG2fLff7kDjhHq5ppAjWV18CK5b8z5RjN2TA+ZkcfGD3FaJcDcyacg5rBXcuslmP1PqG3tPq38pfYpbKgFzJIpvJxz4DB2yz6UIx+LLSST7TA/rBizX8GjhFT72/z3JTDSNmA= 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 04.07.24 06:31, Oscar Salvador wrote: > PMD-mapped hugetlb vmas will also reach damon_mkold_pmd_entry. > Add the required code so it knows how to handle those there. > > Signed-off-by: Oscar Salvador > --- > mm/damon/ops-common.c | 21 ++++++++++++++++----- > mm/damon/vaddr.c | 15 +++++---------- > 2 files changed, 21 insertions(+), 15 deletions(-) > (besides a lot of this code needing cleanups and likely fixes) > diff --git a/mm/damon/ops-common.c b/mm/damon/ops-common.c > index d25d99cb5f2b..6727658a3ef5 100644 > --- a/mm/damon/ops-common.c > +++ b/mm/damon/ops-common.c > @@ -53,18 +53,29 @@ void damon_ptep_mkold(pte_t *pte, struct vm_area_struct *vma, unsigned long addr > > void damon_pmdp_mkold(pmd_t *pmd, struct vm_area_struct *vma, unsigned long addr) > { > -#ifdef CONFIG_TRANSPARENT_HUGEPAGE > - struct folio *folio = damon_get_folio(pmd_pfn(pmdp_get(pmd))); > +#ifdef CONFIG_PGTABLE_HAS_HUGE_LEAVES > + struct folio *folio; > + unsigned long size; > + > + if (is_vm_hugetlb_page(vma)) { > + folio = pfn_folio(pdm_pfn(*pmd)) > + folio_get(folio); > + size = huge_page_size(hstate_vma(vma)); > + } else { > + folio = damon_get_folio(pmd_pfn(*pmd)); > + size = PMD_SIZE; > + } > > if (!folio) > - return; > + return 0; > > - if (pmdp_clear_young_notify(vma, addr, pmd)) > + if (pmdp_test_and_clear_young(vma, addr, pmd) || > + mmu_notifier_clear_young(mm, addr, addr + size)) > folio_set_young(folio); And I think here is the issue for both the cont-PMD and cont-PTE case: For hugetlb we *absolutely must* use the set_huge_pte_at()-style functions, otherwise we might suddenly lose the cont-pte/cont-pmd bit. We cannot arbitrarily replace these "huge_pte" functions by others that work on individual PTEs/PMDs. (noting that the hugetlb code in damon_hugetlb_mkold() is likely not correct, because we could be losing concurrently set dirty bits I believe) -- Cheers, David / dhildenb