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[2003:cb:c706:b600:cfda:b383:a116:a940]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-42caeb8182dsm110447895e9.36.2024.09.10.05.05.06 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 10 Sep 2024 05:05:07 -0700 (PDT) Message-ID: <35021b64-df98-4a43-be48-c454b7a95b93@redhat.com> Date: Tue, 10 Sep 2024 14:05:06 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] mm/debug_vm_pgtable: Use pxdp_get() for accessing page table entries To: Anshuman Khandual , linux-mm@kvack.org Cc: Andrew Morton , Ryan Roberts , linux-kernel@vger.kernel.org References: <20240910115746.514454-1-anshuman.khandual@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: <20240910115746.514454-1-anshuman.khandual@arm.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: qzykmi5pqobgx4hxj3xziayfsm4ukbyk X-Rspamd-Queue-Id: 95EE51C0011 X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1725969911-53810 X-HE-Meta: U2FsdGVkX1+FSW3AkkhDFqwaI+BLS/Y2bP69v0rOK7C72hO1NqbDTRzSpISxMVBVVtnU/Kl9yh4tEhMQ1IS3dYS9g55+BweLIbtjzfB/2lbNssZHZbY4+kgzTQjYvKoVvM5a35mLKDIX6IwHI7bWXHTG988stAsOuwhM7lnGNL5orj3LlVv5deIGNat0yuclnI+dhswTWhzeu+3X5ebhMgQDbgTrM1gHr3CftyaGJ2xFFmLmDJAhEPAefk6TRTsOKN3YGLgsiCoERDmdFWqK25cn9jPS9NPU1hHqm8GD1X5AF+/B3y1t7OLoyLkoUaEVfyb4wH7MGzjcowsEMqXdrEHOrg8jmSVScZKEU6P+/b7e0ESZCMgpY8+e78BJwIXvwiWtNFlUlxCrhhtdi1AwCyWcYxlgSR2UawTaV3QjjdsULJf0i+gkKerNjNggXXBtbRp9ytWEpdCtcX0hB4FMEla983CO19DDA8+RELvsE84jh3AIEBoN2PjXVFJihcITvaiv3lMMRnlvzGdbnHBVvXv2HHtxDeyi1E2XGHvIN2nddohimtt146Yuy9ENxfAjxnp86ElOEK+HYJ6qSPm+1YFXqxNNbaWKfyfgC6OJDhPykrUKnc7WFMUASC6qnJuZl1IibNUJHGOFxOtsNQW+mmtCIE/GjbpFcCt6XgKux6xpzQiM/KjxlCYzgo8Oj3lJbkW0CSFMvpWgebEHu+U32sBF0tjvJz+ZyCreGW0ymboXZ5G3OSJ8rIEH942YZZ/eylkYC+CH66a2ehR2J87AKkzrFPoJyYeTG1/KoLWwRRfTgj8m7Hh++5n7vBCk2OYUgJy2lbXtAQAiml+VPaL+xiXQbvOb1eW9QMz2pldSI1P5XFB2NLOT8eRJgzXbINVB/ljUrJhqM3ykCy0yM2egBnUrAR+K58RxeUtn2PnCF8LU8oeiRhIHDDEfMSJj85m0acPDGQdXBn28oKSVKPN j1X2Wr3l 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 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 10.09.24 13:57, Anshuman Khandual wrote: > This replaces all the existing READ_ONCE() based page table accesses with > respective pxdp_get() helpers. Although these helpers might also fallback > to READ_ONCE() as default, but they do provide an opportunity for various > platforms to override when required. This change is a step in direction to > replace all page table entry accesses with respective pxdp_get() helpers. > Quite some work ahead. :) > Cc: Andrew Morton > Cc: David Hildenbrand > Cc: Ryan Roberts > Cc: linux-mm@kvack.org > Cc: linux-kernel@vger.kernel.org > Signed-off-by: Anshuman Khandual > --- Acked-by: David Hildenbrand -- Cheers, David / dhildenb