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(p200300d82f4d0e00029859cc25140052.dip0.t-ipconnect.de. [2003:d8:2f4d:e00:298:59cc:2514:52]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-45dd5098292sm41666025e9.1.2025.09.05.03.19.12 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 05 Sep 2025 03:19:12 -0700 (PDT) Message-ID: Date: Fri, 5 Sep 2025 12:19:11 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] tools/mm: Add madvise tool To: kirill@shutemov.name, Andrew Morton , Lorenzo Stoakes , "Liam R . Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , linux-mm@kvack.org Cc: Usama Arif , Kiryl Shutsemau References: <20250904175729.1029735-1-kirill@shutemov.name> 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 ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZoEEwEIAEQCGwMCF4ACGQEFCwkIBwICIgIG FQoJCAsCBBYCAwECHgcWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaJzangUJJlgIpAAKCRBN 3hD3AP+DWhAxD/9wcL0A+2rtaAmutaKTfxhTP0b4AAp1r/eLxjrbfbCCmh4pqzBhmSX/4z11 opn2KqcOsueRF1t2ENLOWzQu3Roiny2HOU7DajqB4dm1BVMaXQya5ae2ghzlJN9SIoopTWlR 0Af3hPj5E2PYvQhlcqeoehKlBo9rROJv/rjmr2x0yOM8qeTroH/ZzNlCtJ56AsE6Tvl+r7cW 3x7/Jq5WvWeudKrhFh7/yQ7eRvHCjd9bBrZTlgAfiHmX9AnCCPRPpNGNedV9Yty2Jnxhfmbv Pw37LA/jef8zlCDyUh2KCU1xVEOWqg15o1RtTyGV1nXV2O/mfuQJud5vIgzBvHhypc3p6VZJ lEf8YmT+Ol5P7SfCs5/uGdWUYQEMqOlg6w9R4Pe8d+mk8KGvfE9/zTwGg0nRgKqlQXrWRERv cuEwQbridlPAoQHrFWtwpgYMXx2TaZ3sihcIPo9uU5eBs0rf4mOERY75SK+Ekayv2ucTfjxr Kf014py2aoRJHuvy85ee/zIyLmve5hngZTTe3Wg3TInT9UTFzTPhItam6dZ1xqdTGHZYGU0O otRHcwLGt470grdiob6PfVTXoHlBvkWRadMhSuG4RORCDpq89vu5QralFNIf3EysNohoFy2A LYg2/D53xbU/aa4DDzBb5b1Rkg/udO1gZocVQWrDh6I2K3+cCs7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20250904175729.1029735-1-kirill@shutemov.name> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: pjzXvNvCgG09d_vPlIQGJTl_c1zKeiVcrbjFhOgg5Xs_1757067554 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: rspam12 X-Rspamd-Queue-Id: ACACA1C0021 X-Stat-Signature: qq5crnbudft79xbc34p936irt8jzz8sm X-Rspam-User: X-HE-Tag: 1757067556-143659 X-HE-Meta: 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 VEK+D3Vy LmFarx0DrMULKvWzUcV3L4rqAJHTmtKdTNdoFrMUMbeIhTwwLTmWwzF6Gp5KJ7kCl0D2WCB6FBBBJXmEAX5KtThvNf76H1Sh9g5Cx6vDmlMGVdSxF6SQB9STFx+IwjZlE72biSan1sMGhQU6Y/GoNiUvtlVHUEuDVduu1qxH1EqGbCXztCtkx5NP0YfOfcmKjc8KWGpJMcdoeYqNxMXB3Za6Bx9wt9D8gMBDxArWWbZoa5Lg8r+vy6FOgbsUjvABhoMupd4VauAA1/GAvSzixSlkdKbVFG+DD53GP2vRRcwxofCtmprhdmkvnr78Zdm9avxPpFivsd+DvDsZRkLjj6NYCtbxl9QlDSWlanvNLAIdbUrwcYjxJlWbhZrvYlcGfPMsE7BVHe+SWzRGwy94u6w0pJsciM50wP3FX24usA4lFZfClEJqIJzj+qnZXaVgslHpAcV+56PgWkJA= 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 04.09.25 19:57, kirill@shutemov.name wrote: > From: Kiryl Shutsemau > > Add a simple tool that allows to issue an advice on a process or a file. > > It can be useful to experiment with effects of an advice on a workload > without modifying the workload itself. > > Only supports advices available for process_madvise(). > > Signed-off-by: Kiryl Shutsemau > --- > + if (pid) { > + struct iovec vec = { > + .iov_base = (void *)start, > + .iov_len = end - start, > + }; > + ssize_t ret; > + > + ret = process_madvise(fd, &vec, 1, advice, 0); > + if (ret < 0) > + perror("process_madvise"), exit(-1); > + > + if ((unsigned long)ret != end - start) > + printf("Partial advice occurred. Stopped at %#lx\n", start + ret); > + } else { > + unsigned long addr, hpage_pmd_size; > + void *p; > + int ret; > + > + hpage_pmd_size = read_pmd_pagesize(); > + if (!hpage_pmd_size) { > + printf("Reading PMD pagesize failed"); > + exit(-1); > + } > + > + // Allocate virtual address space to align the target mmap to PMD size > + // Some advices require this. I assume the kernel coding-style applies to tools/ as well, so /* * ... */ -- Cheers David / dhildenb