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[2003:cb:c706:ed00:59ee:f048:4ed9:62a6]) by smtp.gmail.com with ESMTPSA id r15-20020a05600c458f00b0040472ad9a3dsm15384511wmo.14.2023.11.15.07.16.36 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 15 Nov 2023 07:16:37 -0800 (PST) Message-ID: Date: Wed, 15 Nov 2023 16:16:36 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC V3 PATCH] arm64: mm: swap: save and restore mte tags for large folios To: Barry Song <21cnbao@gmail.com>, steven.price@arm.com, akpm@linux-foundation.org, ryan.roberts@arm.com, catalin.marinas@arm.com, will@kernel.org Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@suse.com, shy828301@gmail.com, v-songbaohua@oppo.com, wangkefeng.wang@huawei.com, willy@infradead.org, xiang@kernel.org, ying.huang@intel.com, yuzhao@google.com References: <20231114014313.67232-1-v-songbaohua@oppo.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: <20231114014313.67232-1-v-songbaohua@oppo.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-Rspamd-Queue-Id: 23ACC1C002C X-Rspam-User: X-Rspamd-Server: rspam11 X-Stat-Signature: qn9x8iiqwx5he17nuhnnppe9aekanje8 X-HE-Tag: 1700061400-859575 X-HE-Meta: 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 l942Yy01 SnCA5oON1lg0zX+QSZfjJH7MtBqv7QSVW9VUKH7eVVVB0CpCuqrgLfo9wzF28pyUG90PFCCNy5A6vs67qufNEefj+LU8U/MwaC98vu2mbFbI11F+2fvbP3yop1kLBtS69+IHjnMeBoFzwiIfmx1WrU8RmchBIW8ydr6d2QfLpAZnnEllSkrqwrBBPCaCJVZFj+AeaPgcUfh7O4SyEjr8uttErKgc0ylVmmxSG6acXJ+nhOwnSb6plQ4ZvFAkfaCDr19xu9LnoyoZe8b+ofN7hvF3ZfWqb+l/OK6f/d8nJ+ONEUHfwVNIBVin9+j5vD9WYczrwoiQIa+aWJgkJfRrhdQMzVxUE88jUQ2vz2QcrNiA6/eAC52U+1at9Y66zwAcTH9zvpTORrAI8k1LKW/4OHWcUYzhfYjQpsZywI7kEfRcjmYs= 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 14.11.23 02:43, Barry Song wrote: > This patch makes MTE tags saving and restoring support large folios, > then we don't need to split them into base pages for swapping out > on ARM64 SoCs with MTE. > > arch_prepare_to_swap() should take folio rather than page as parameter > because we support THP swap-out as a whole. > > Meanwhile, arch_swap_restore() should use page parameter rather than > folio as swap-in always works at the granularity of base pages right > now. ... but then we always have order-0 folios and can pass a folio, or what am I missing? > > arch_thp_swp_supported() is dropped since ARM64 MTE was the only one > who needed it. Can we do that separately? -- Cheers, David / dhildenb