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[2003:cb:c718:6400:7621:b88a:e99e:2fa8]) by smtp.gmail.com with ESMTPSA id q10-20020adffeca000000b0033dd2a7167fsm14156995wrs.29.2024.04.16.01.08.35 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 16 Apr 2024 01:08:36 -0700 (PDT) Message-ID: <43def405-a55c-4bea-9caf-220408ddac40@redhat.com> Date: Tue, 16 Apr 2024 10:08:35 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 0/4] mm: add per-order mTHP alloc and swpout counters To: Barry Song <21cnbao@gmail.com> Cc: akpm@linux-foundation.org, linux-mm@kvack.org, cerasuolodomenico@gmail.com, chrisl@kernel.org, kasong@tencent.com, linux-kernel@vger.kernel.org, peterx@redhat.com, ryan.roberts@arm.com, surenb@google.com, v-songbaohua@oppo.com, willy@infradead.org, yosryahmed@google.com, yuzhao@google.com, corbet@lwn.net References: <20240412114858.407208-1-21cnbao@gmail.com> <20e36996-0c78-4b81-8e91-1035d5ce0652@redhat.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: 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: 8bit X-Rspamd-Queue-Id: 5C6A440010 X-Rspam-User: X-Rspamd-Server: rspam11 X-Stat-Signature: unh4g5f9h6c1stj1dsu5m3dn6bq6mho6 X-HE-Tag: 1713254922-362531 X-HE-Meta: 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 1OYInlXZ 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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 12.04.24 15:16, Barry Song wrote: > On Sat, Apr 13, 2024 at 12:54 AM David Hildenbrand wrote: >> >> On 12.04.24 13:48, Barry Song wrote: >>> From: Barry Song >>> >>> The patchset introduces a framework to facilitate mTHP counters, starting >>> with the allocation and swap-out counters. Currently, only four new nodes >>> are appended to the stats directory for each mTHP size. >>> >>> /sys/kernel/mm/transparent_hugepage/hugepages-/stats >>> anon_fault_alloc >>> anon_fault_fallback >>> anon_fault_fallback_charge >>> anon_swpout >>> anon_swpout_fallback >>> >>> These nodes are crucial for us to monitor the fragmentation levels of >>> both the buddy system and the swap partitions. In the future, we may >>> consider adding additional nodes for further insights. >>> >>> -v6: >>> * collect reviewed-by tags for patch2/4, 3/4, 4/4, Ryan; >>> * move back to static array by using MAX_PTRS_PER_PTE, Ryan; >>> * move to for_each_possible_cpu to handle cpu hotplug, Ryan; >>> * other minor cleanups according to Ryan; >> >> Please *really* not multiple versions of the same patch set on one a >> single day. > > Ok. I will leave more time for you to review the older versions before moving > to a new version. Yes please. There is not anything gained from sending out stuff to fast, besides mixing discussions, same questions/comments ... and effectively more work for reviewers. -- Cheers, David / dhildenb