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(p200300cbc7302200722983b1524e283a.dip0.t-ipconnect.de. [2003:cb:c730:2200:7229:83b1:524e:283a]) by smtp.gmail.com with ESMTPSA id jj19-20020a05600c6a1300b0040fccf7e8easm9024482wmb.36.2024.02.12.08.27.59 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 12 Feb 2024 08:28:00 -0800 (PST) Message-ID: Date: Mon, 12 Feb 2024 17:27:59 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 22/25] mm: Add pte_batch_hint() to reduce scanning in folio_pte_batch() To: Ryan Roberts , Catalin Marinas , Will Deacon , Ard Biesheuvel , Marc Zyngier , James Morse , Andrey Ryabinin , Andrew Morton , Matthew Wilcox , Mark Rutland , Kefeng Wang , John Hubbard , Zi Yan , Barry Song <21cnbao@gmail.com>, Alistair Popple , Yang Shi , Nicholas Piggin , Christophe Leroy , "Aneesh Kumar K.V" , "Naveen N. Rao" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" Cc: linux-arm-kernel@lists.infradead.org, x86@kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20240202080756.1453939-1-ryan.roberts@arm.com> <20240202080756.1453939-23-ryan.roberts@arm.com> <6d452a1a-1edc-4e97-8b39-99dc48315bb8@redhat.com> <82c59a7f-328e-4521-8855-ccacc3dc4ce5@arm.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: <82c59a7f-328e-4521-8855-ccacc3dc4ce5@arm.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240212_082805_841877_44B8D28D X-CRM114-Status: GOOD ( 23.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gMTIuMDIuMjQgMTY6NDcsIFJ5YW4gUm9iZXJ0cyB3cm90ZToKPiBPbiAxMi8wMi8yMDI0IDEz OjQzLCBEYXZpZCBIaWxkZW5icmFuZCB3cm90ZToKPj4gT24gMDIuMDIuMjQgMDk6MDcsIFJ5YW4g Um9iZXJ0cyB3cm90ZToKPj4+IFNvbWUgYXJjaGl0ZWN0dXJlcyAoZS5nLiBhcm02NCkgY2FuIHRl bGwgZnJvbSBsb29raW5nIGF0IGEgcHRlLCBpZiBzb21lCj4+PiBmb2xsb3ctb24gcHRlcyBhbHNv IG1hcCBjb250aWd1b3VzIHBoeXNpY2FsIG1lbW9yeSB3aXRoIHRoZSBzYW1lIHBncHJvdC4KPj4+ IChmb3IgYXJtNjQsIHRoZXNlIGFyZSBjb250cHRlIG1hcHBpbmdzKS4KPj4+Cj4+PiBUYWtlIGFk dmFudGFnZSBvZiB0aGlzIGtub3dsZWRnZSB0byBvcHRpbWl6ZSBmb2xpb19wdGVfYmF0Y2goKSBz byB0aGF0Cj4+PiBpdCBjYW4gc2tpcCB0aGVzZSBwdGVzIHdoZW4gc2Nhbm5pbmcgdG8gY3JlYXRl IGEgYmF0Y2guIEJ5IGRlZmF1bHQsIGlmCj4+PiBhbiBhcmNoIGRvZXMgbm90IG9wdC1pbiwgZm9s aW9fcHRlX2JhdGNoKCkgcmV0dXJucyBhIGNvbXBpbGUtdGltZSAxLCBzbwo+Pj4gdGhlIGNoYW5n ZXMgYXJlIG9wdGltaXplZCBvdXQgYW5kIHRoZSBiZWhhdmlvdXIgaXMgYXMgYmVmb3JlLgo+Pj4K Pj4+IGFybTY0IHdpbGwgb3B0LWluIHRvIHByb3ZpZGluZyB0aGlzIGhpbnQgaW4gdGhlIG5leHQg cGF0Y2gsIHdoaWNoIHdpbGwKPj4+IGdyZWF0bHkgcmVkdWNlIHRoZSBjb3N0IG9mIHB0ZXBfZ2V0 KCkgd2hlbiBzY2FubmluZyBhIHJhbmdlIG9mIGNvbnRwdGVzLgo+Pj4KPj4+IFRlc3RlZC1ieTog Sm9obiBIdWJiYXJkIDxqaHViYmFyZEBudmlkaWEuY29tPgo+Pj4gU2lnbmVkLW9mZi1ieTogUnlh biBSb2JlcnRzIDxyeWFuLnJvYmVydHNAYXJtLmNvbT4KPj4+IC0tLQo+Pj4gIMKgIGluY2x1ZGUv bGludXgvcGd0YWJsZS5oIHwgMTggKysrKysrKysrKysrKysrKysrCj4+PiAgwqAgbW0vbWVtb3J5 LmPCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgfCAyMCArKysrKysrKysrKysrLS0tLS0tLQo+Pj4g IMKgIDIgZmlsZXMgY2hhbmdlZCwgMzEgaW5zZXJ0aW9ucygrKSwgNyBkZWxldGlvbnMoLSkKPj4+ Cj4+PiBkaWZmIC0tZ2l0IGEvaW5jbHVkZS9saW51eC9wZ3RhYmxlLmggYi9pbmNsdWRlL2xpbnV4 L3BndGFibGUuaAo+Pj4gaW5kZXggNTBmMzJjY2NiZDkyLi5jYmEzMWYxNzdkMjcgMTAwNjQ0Cj4+ PiAtLS0gYS9pbmNsdWRlL2xpbnV4L3BndGFibGUuaAo+Pj4gKysrIGIvaW5jbHVkZS9saW51eC9w Z3RhYmxlLmgKPj4+IEBAIC0yMTIsNiArMjEyLDI0IEBAIHN0YXRpYyBpbmxpbmUgaW50IHBtZF9k aXJ0eShwbWRfdCBwbWQpCj4+PiAgwqAgI2RlZmluZSBhcmNoX2ZsdXNoX2xhenlfbW11X21vZGUo KcKgwqDCoCBkbyB7fSB3aGlsZSAoMCkKPj4+ICDCoCAjZW5kaWYKPj4+ICDCoCArI2lmbmRlZiBw dGVfYmF0Y2hfaGludAo+Pj4gKy8qKgo+Pj4gKyAqIHB0ZV9iYXRjaF9oaW50IC0gTnVtYmVyIG9m IHBhZ2VzIHRoYXQgY2FuIGJlIGFkZGVkIHRvIGJhdGNoIHdpdGhvdXQgc2Nhbm5pbmcuCj4+PiAr ICogQHB0ZXA6IFBhZ2UgdGFibGUgcG9pbnRlciBmb3IgdGhlIGVudHJ5Lgo+Pj4gKyAqIEBwdGU6 IFBhZ2UgdGFibGUgZW50cnkuCj4+PiArICoKPj4+ICsgKiBTb21lIGFyY2hpdGVjdHVyZXMga25v dyB0aGF0IGEgc2V0IG9mIGNvbnRpZ3VvdXMgcHRlcyBhbGwgbWFwIHRoZSBzYW1lCj4+PiArICog Y29udGlndW91cyBtZW1vcnkgd2l0aCB0aGUgc2FtZSBwZXJtaXNzaW9ucy4gSW4gdGhpcyBjYXNl LCBpdCBjYW4gcHJvdmlkZSBhCj4+PiArICogaGludCB0byBhaWQgcHRlIGJhdGNoaW5nIHdpdGhv dXQgdGhlIGNvcmUgY29kZSBuZWVkaW5nIHRvIHNjYW4gZXZlcnkgcHRlLgo+Pgo+PiBJIHRoaW5r IHdlIG1pZ2h0IHdhbnQgdG8gZG9jdW1lbnQgaGVyZSB0aGUgZXhwZWN0YXRpb24gcmVnYXJkaW5n Cj4+IGRpcnR5L2FjY2Vzc2VkIGJpdHMuIGZvbGlvX3B0ZV9iYXRjaCgpIHdpbGwgaWdub3JlIGRp cnR5IGJpdHMgb25seSB3aXRoCj4+IEZQQl9JR05PUkVfRElSVFkuIEJ1dCBlc3BlY2lhbGx5IGZv ciBhcm02NCwgaXQgbWFrZXMgc2Vuc2UgdG8gaWdub3JlIHRoZW0KPj4gYWx3YXlzIHdoZW4gYmF0 Y2hpbmcsIGJlY2F1c2UgdGhlIGRpcnR5IGJpdCBtYXkgdGFyZ2V0IGFueSBwdGUgcGFydCBvZiB0 aGUKPj4gY29udC1wdGUgZ3JvdXAgZWl0aGVyIHdheS4KPj4KPj4gTWF5YmUgc29tZXRoaW5nIGxp a2U6Cj4+Cj4+ICIKPj4gQW4gYXJjaGl0ZWN0dXJlIGltcGxlbWVudGF0aW9uIG1heSBvbmx5IGln bm9yZSB0aGUgUFRFIGFjY2Vzc2VkIGFuZCBkaXJ0eSBiaXRzLgo+PiBGdXJ0aGVyLCBpdCBtYXkg b25seSBpZ25vcmUgdGhlIGRpcnR5IGJpdCBpZiB0aGF0IGJpdCBpcyBhbHJlYWR5IG5vdAo+PiBt YWludGFpbmVkIHdpdGggcHJlY2lzaW9uIHBlciBQVEUgaW5zaWRlIHRoZSBoaW50ZWQgYmF0Y2gs IGFuZCBwdGVwX2dldCgpCj4+IHdvdWxkIGFscmVhZHkgaGF2ZSB0byBjb2xsZWN0IGl0IGZyb20g dmFyaW91cyBQVEVzLgo+PiAiCj4gCj4gSSdtIHByb3Bvc2luZyB0byBzaW1wbGlmeSB0aGlzIHRv Ogo+IAo+ICIKPiBBbiBhcmNoaXRlY3R1cmUgaW1wbGVtZW50YXRpb24gbWF5IGlnbm9yZSB0aGUg UFRFIGFjY2Vzc2VkIHN0YXRlLiBGdXJ0aGVyLCB0aGUKPiBkaXJ0eSBzdGF0ZSBtdXN0IGFwcGx5 IGF0b21pY2FsbHkgdG8gYWxsIHRoZSBQVEVzIGRlc2NyaWJlZCBieSB0aGUgaGludC4KPiAiCj4g Cj4gV2hpY2ggSSB0aGluayBtb3JlIGFjY3VyYXRlbHkgZGVzY3JpYmVzIHRoZSByZXF1aXJlbWVu dC4gU2hvdXQgaWYgeW91IGRpc2FncmVlLgoKSSdtIG5vdCAxMDAlIHN1cmUgaWYgdGhlICJtdXN0 IGFwcGx5IGF0b21pY2FsbHkiIGlzIGNsZWFyIHdpdGhvdXQgYWxsIG9mIAp0aGUgY29udC1wdGUg ZGV0YWlscyBhbmQgcHRlcF9nZXQoKS4gQnV0IEkgZmFpbCB0byBkZXNjcmliZSBpdCBpbiBhIApi ZXR0ZXIgd2F5LgoKSXQncyBhbGwgYmV0dGVyIGNvbXBhcmVkIHRvIHdoYXQgd2UgaGFkIGJlZm9y ZSwgc28gTEdUTSA6KQoKLS0gCkNoZWVycywKCkRhdmlkIC8gZGhpbGRlbmIKCgpfX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1hcm0ta2VybmVsIG1h aWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xp c3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1hcm0ta2VybmVsCg==