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 9E219C27C4F for ; Tue, 18 Jun 2024 09:55:55 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 1828D8D0025; Tue, 18 Jun 2024 05:55:55 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 10BE78D0020; Tue, 18 Jun 2024 05:55:55 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E7A188D0025; Tue, 18 Jun 2024 05:55:54 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id C6D2D8D0020 for ; Tue, 18 Jun 2024 05:55:54 -0400 (EDT) Received: from smtpin08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 33AF11406DB for ; Tue, 18 Jun 2024 09:55:54 +0000 (UTC) X-FDA: 82243553028.08.FFC1FF3 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by imf09.hostedemail.com (Postfix) with ESMTP id E04A014000D for ; Tue, 18 Jun 2024 09:55:51 +0000 (UTC) Authentication-Results: imf09.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=H3h06S61; spf=pass (imf09.hostedemail.com: domain of david@redhat.com designates 170.10.129.124 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=1718704547; 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=z5YI0xydh0ov76+FamwJ/hbbiesyq6lQbps4wdHRql8=; b=Y2y+8/Chv0jCSiETrFh30WmkyF+LbC3KGNKHKWo/pmjzKRrmNx1yP23AtvMShXCwss9q71 X6qWJ7Nv35gHcqCvrgqbsPEngiZndevbWvDjvO+P1eKl7aiwb+IPoDfVpcs2rW6fFlV+10 jMmke6FIjQaRLLmNlq5hibC/YxDEeSI= ARC-Authentication-Results: i=1; imf09.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=H3h06S61; spf=pass (imf09.hostedemail.com: domain of david@redhat.com designates 170.10.129.124 as permitted sender) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=none) header.from=redhat.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1718704547; a=rsa-sha256; cv=none; b=CzXX9L6sdqHs1amrXw/oCWEO1Stsy1DtUsNK6LdsmORCHC9I4qKngLGJlaIWshM5C421/O 5uCJDd4plfAr0j9qtkpTbqsvrB1Qy0iJNRWG73INaW52yk3MauOVrVgnPYel/sYCkI4XsA AJyJTW6el7tHI2VoO5ga6L+b0R6UhNA= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1718704547; 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=z5YI0xydh0ov76+FamwJ/hbbiesyq6lQbps4wdHRql8=; b=H3h06S61pjYGqlrZ+trqAyhCi4UP9LYsDcBCJJSXMrAV43njJL/24nImG05dCnJWMzruHA Zt4rPaK/zlS+haj0ayHgpXF1p+fym0UArgFiho7UEUET2+SCocSl+9JLgcuq8Scz0c2r4I mO/MD+82hdlxUI84bnTzDDJVRNNQmhE= Received: from mail-lf1-f69.google.com (mail-lf1-f69.google.com [209.85.167.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-339-zU7bXzZROWmCKaUDjfZ4CQ-1; Tue, 18 Jun 2024 05:55:45 -0400 X-MC-Unique: zU7bXzZROWmCKaUDjfZ4CQ-1 Received: by mail-lf1-f69.google.com with SMTP id 2adb3069b0e04-52c978dbd31so3692675e87.3 for ; Tue, 18 Jun 2024 02:55:45 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1718704541; x=1719309341; 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=z5YI0xydh0ov76+FamwJ/hbbiesyq6lQbps4wdHRql8=; b=Yl6m0f80BgzaL1dvFYepL5JS2K2BI2+eDKQCy0qlGn/HKloxi9zwmgTX2CDnzktiPn Xy6U3dz57NP8pT+fXpsBHaPV55yq2C/6lpNcAM/CBphNlR6CFSIen9+i/CMnNyHGztZn fi3g+XpGIjHRQLsJxp4UG+zRtcA+zt/TB+3i4LgxRYmucnctxupZO9cKh6UUV7aszoa0 QhxZA2WOU78pNTc67vTzlv4CBvBCBpKmh3ar28ZK7ZUbHjynk6jQ5wryY7FQVYeyx79j LQTqsPcCOFKCWKnM4+es9t7ghnSywYX5FsfO5s9XvVoH/ra9nroLOvIplgLJcKWRDqYN 4mHg== X-Forwarded-Encrypted: i=1; AJvYcCWRetszqH40eG0lSe+SbE9WCdkcfbYdEZzn28JtG0jXoYqfxJvW4OsOIW62NZnBg4qj+8jni8wFVtusSZeJcM+yanY= X-Gm-Message-State: AOJu0Yyy40Eie9f3aQy51nGIv18mshPLQgv62hOmsIUHh6dceRwtRoGN kGjGdy+4nO69Q9MuFNIU6dXbT3igZSZ2jSxdlN28gwhxlwwMIbHxEaGmyATlNUhVs9t81yoaSRc gBdbEGzQj3/qhKuPKH6t4m4fKHEZVRHTAuapF8Cibad8yoA/g X-Received: by 2002:a05:6512:2803:b0:52c:5925:fc9d with SMTP id 2adb3069b0e04-52ca6e91e8bmr8881734e87.45.1718704541080; Tue, 18 Jun 2024 02:55:41 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHUyzt/BRLVaWoSSFFyk+Io1RCvpoKcwPlM3m4GASbG4LK3I3KVQJy3llQsTPnUUYQz5lJfAg== X-Received: by 2002:a05:6512:2803:b0:52c:5925:fc9d with SMTP id 2adb3069b0e04-52ca6e91e8bmr8881715e87.45.1718704540575; Tue, 18 Jun 2024 02:55:40 -0700 (PDT) Received: from ?IPV6:2003:cb:c705:1400:78ba:c2d2:22a1:8858? (p200300cbc705140078bac2d222a18858.dip0.t-ipconnect.de. [2003:cb:c705:1400:78ba:c2d2:22a1:8858]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-42286fe8fb8sm223290305e9.11.2024.06.18.02.55.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 18 Jun 2024 02:55:40 -0700 (PDT) Message-ID: <171f18ed-3fc7-47c8-8aef-d4ab31f55be0@redhat.com> Date: Tue, 18 Jun 2024 11:55:38 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 3/3] mm: remove folio_test_anon(folio)==false path in __folio_add_anon_rmap() To: Barry Song <21cnbao@gmail.com>, akpm@linux-foundation.org, linux-mm@kvack.org Cc: baolin.wang@linux.alibaba.com, chrisl@kernel.org, linux-kernel@vger.kernel.org, mhocko@suse.com, ryan.roberts@arm.com, shy828301@gmail.com, surenb@google.com, v-songbaohua@oppo.com, willy@infradead.org, ying.huang@intel.com, yosryahmed@google.com, yuzhao@google.com, Shuai Yuan References: <20240617231137.80726-1-21cnbao@gmail.com> <20240617231137.80726-4-21cnbao@gmail.com> 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: <20240617231137.80726-4-21cnbao@gmail.com> 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: xmk9jmzzg5mhobbgrziw4g3taqu5d8w4 X-Rspam-User: X-Rspamd-Queue-Id: E04A014000D X-Rspamd-Server: rspam02 X-HE-Tag: 1718704551-565521 X-HE-Meta: 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 PnnLjAFW IbdPxFs2a6g9KpUhVtwWil3kyhg6mh+RMGem4yhDMdH3vR0RInlTrWqZ4dY4N/cLWPLLYv8f/T2sweIedkaTfiTVOXaqHIxFhDL674wCreX7uxx1HUnsf2UPPqygoBY/sgZb34mFn514jgBN+sdWJHciw8omL6jWNfDm/zQgRpqssYvSSp5MIP7UlsmLzyPwlttqiUrXZB+DFLeucL0is5yrC1WhTRZbWF9dDqbi0RWd7WIVARVrTz7o/+VwE1543LjFuB1p2CojJyPmdi+rBGGDxE/nGkBD0P08iURYvn4kdDMqHH4v1UgEtAisPgaB9/FVg8pZ8crsvmVy+O2VixN78/6MJVqEjjs5+GK1lvsa1bfY1NwlMSCIVzp5JuyROJb3ErAu+01p39vZzI0HrvW+zEewDHbKYbZ8rks9cUNb+i2MN3YJPm9kP5oM6Gcsfi0H5IWPaW9kqIxvsyru6p0NjWwj/qqLVsHURJUPuimLLrs0cGJHvilE1WVAEF67FX6ln 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 18.06.24 01:11, Barry Song wrote: > From: Barry Song > > The folio_test_anon(folio)==false cases has been relocated to > folio_add_new_anon_rmap(). Additionally, four other callers > consistently pass anonymous folios. > > stack 1: > remove_migration_pmd > -> folio_add_anon_rmap_pmd > -> __folio_add_anon_rmap > > stack 2: > __split_huge_pmd_locked > -> folio_add_anon_rmap_ptes > -> __folio_add_anon_rmap > > stack 3: > remove_migration_pmd > -> folio_add_anon_rmap_pmd > -> __folio_add_anon_rmap (RMAP_LEVEL_PMD) > > stack 4: > try_to_merge_one_page > -> replace_page > -> folio_add_anon_rmap_pte > -> __folio_add_anon_rmap > > __folio_add_anon_rmap() only needs to handle the cases > folio_test_anon(folio)==true now. > We can remove the !folio_test_anon(folio)) path within > __folio_add_anon_rmap() now. > > Suggested-by: David Hildenbrand > Signed-off-by: Barry Song > Tested-by: Shuai Yuan > --- > mm/rmap.c | 17 +++-------------- > 1 file changed, 3 insertions(+), 14 deletions(-) > > diff --git a/mm/rmap.c b/mm/rmap.c > index 2b19bb92eda5..ddcdda752982 100644 > --- a/mm/rmap.c > +++ b/mm/rmap.c > @@ -1297,23 +1297,12 @@ static __always_inline void __folio_add_anon_rmap(struct folio *folio, > { > int i, nr, nr_pmdmapped = 0; > > + VM_WARN_ON_FOLIO(!folio_test_anon(folio), folio); > + > nr = __folio_add_rmap(folio, page, nr_pages, level, &nr_pmdmapped); > > - if (unlikely(!folio_test_anon(folio))) { > - VM_WARN_ON_FOLIO(!folio_test_locked(folio), folio); > - /* > - * For a PTE-mapped large folio, we only know that the single > - * PTE is exclusive. Further, __folio_set_anon() might not get > - * folio->index right when not given the address of the head > - * page. > - */ > - VM_WARN_ON_FOLIO(folio_test_large(folio) && > - level != RMAP_LEVEL_PMD, folio); > - __folio_set_anon(folio, vma, address, > - !!(flags & RMAP_EXCLUSIVE)); > - } else if (likely(!folio_test_ksm(folio))) { > + if (likely(!folio_test_ksm(folio))) > __page_check_anon_rmap(folio, page, vma, address); > - } > > __folio_mod_stat(folio, nr, nr_pmdmapped); > Lovely! Acked-by: David Hildenbrand -- Cheers, David / dhildenb