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[2003:cb:c70d:1f00:7a4e:8f21:98db:baef]) by smtp.gmail.com with ESMTPSA id t18-20020a5d6912000000b0034997769ae4sm17386642wru.15.2024.04.24.08.00.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 24 Apr 2024 08:00:02 -0700 (PDT) Message-ID: Date: Wed, 24 Apr 2024 17:00:01 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/2] mm: introduce per-order mTHP split counters To: Lance Yang , akpm@linux-foundation.org Cc: 21cnbao@gmail.com, ryan.roberts@arm.com, baolin.wang@linux.alibaba.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org References: <20240424135148.30422-1-ioworker0@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: <20240424135148.30422-1-ioworker0@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-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 335D81C0028 X-Rspam-User: X-Stat-Signature: kuoihr5hmxcujwh7gbwoq6okb6fcegwj X-HE-Tag: 1713970807-475027 X-HE-Meta: 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 48LTnHnl mgAUAPT6nDmyzMlqaNOi251sG0vWb2icUVjyU6eg7XfOjRRbXrRmIVVj54xLMYdKr8WRPgeFIJpqgg3UHnjqz+htxlOkr+oQqtuV1BPsOXgkmF+MuFfFw861jjuuyrCRlcBKq8lCSk0knA2UBYM7XUfK10nR6V7NAtdZJiITD5PrUrnf3TrwQD+eQ61TSttnmFzyGVxrilT1W74t6Nh8B6q0GGYHhvoiyxDyipQeU964XBRbIVgB+oNOuz78Ud8Mpjr2MEIvFWrfpBV3Oou3nTtX4paIq4XFtxomX7fiOfz+nv37wB2OW2RInfpxjak7D+N36hMCPB9WAycOZEsrrVkw9dB+5iPiJ/yEPks0rLmlhYI7u/jMUUEyhrmWpQ4LiBnVuUeDUx9v+lR6L/nCbdab1kzMrIoYWSzML 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 24.04.24 15:51, Lance Yang wrote: > Hi all, > > At present, the split counters in THP statistics no longer include > PTE-mapped mTHP. Therefore, we want to introduce per-order mTHP split > counters to monitor the frequency of mTHP splits. This will assist > developers in better analyzing and optimizing system performance. > > /sys/kernel/mm/transparent_hugepage/hugepages-/stats > split_page > split_page_failed > deferred_split_page > > Thanks, > Lance > --- > > Lance Yang (2): > mm: add per-order mTHP split counters > mm: add docs for per-order mTHP split counters > > Documentation/admin-guide/mm/transhuge.rst | 16 ---------------- We really have to start documenting these, and what the sementics are. E.g., is split_page_failed contained in split_page? Is deferred_split_page contained in split_page? But also: just don't call it "split_page". Drop the "_page". split split_failed split_deferred ? -- Cheers, David / dhildenb