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bh=eFhJ5E/uyPdBbrpIyoaIwOP1sjzJ+IF88TEW3wCH5Dk=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=vh5YLJ8WBQ/6v9t45z6wl0Mu2wiNfyM5sOAw3yBJFzd19PoMsMRS+FdbWpusC5gOL XQAK4mofTchsm0wMyfl7MMGBhSkChZ3MlFSWVAPklW11B3C8Xq1tRt7N/FPGc7dOr2 S18JfVhf6NmaVH+xw8LoVw1LQUjoFYGPW5lgM+qY= Date: Tue, 16 May 2023 14:12:45 -0700 From: Andrew Morton To: Oscar Salvador Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Michal Hocko , Vlastimil Babka , Waiman Long , Suren Baghdasaryan , Marco Elver , Andrey Konovalov , Eric Dumazet , Alexander Potapenko Subject: Re: [PATCH v5 0/3] page_owner: print stacks and their counter Message-Id: <20230516141245.356200756ff3750ef4f12094@linux-foundation.org> In-Reply-To: <20230516182537.3139-1-osalvador@suse.de> References: <20230516182537.3139-1-osalvador@suse.de> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 86D31120016 X-Stat-Signature: w3nb5jjo3jxwf4wnbbg5n57foa5k5hd6 X-HE-Tag: 1684271568-39749 X-HE-Meta: U2FsdGVkX19pKP/KotVr55T91fMuoCW2xL4rteoSvReHEvfUrKM1o0XY5UTvSMgYfm/Wk6uVsM1Te8DMj2+sNa827TLBjpR+9ROv+1UNn1d7wUF4dOV42i39CEQfcP8sATg+De7njeCN2f+34/buLRUYQtwNJhKYUvf6Ts8lA0R6IokEh07bfJPYPTS+f53mAiOhiKPxbjSfx5hl9ejh05InDMU4sV5cO4E386rpWQfXlTkV/l+hIHBRL2ZMLFCLwb1lFXhqbfrLQmpgQeRfIyvbkW+xZfN2T5mDXJMlNX2fkok0W/MRD5vpLlSnVvjcpQg5eDNK1sR5T5AO+y87boZwE7e2vavZqbNls4STvPfzJqbvCTAu7pEVm2TsFEH2PQj0Vp3FO9XxqcmYSx4wyHuDqJkm40T+Shla38/l5ggd+h3vyDG/q9GhwXgZlX8UrjgvxB0W/lPlwBN0alByvaQ4+UZ9tpsl3tCjbk07pbdeZOBJmExCEw2zP/8J9Jg31ru4ZDrR7phivjqStGFxNcgABpiYELZe6NjmHdZUMSAUvSKEALp6sfGl/lrqEUR9oYAh1PRp8OpE9Wl6s2wm72MqyjSC1OLnBgOX1nFxqqterzGdiRJ5B4+R45zJ6XdUiGfdAE6QTeaL3rD3wjvvKAkUw+JBZyrlLRl0czF7AAUI5danr2Otl/hWptydXgk/ZfctclxTivyL0W0Sl8Fk18GcFeegLNDPZ9fPjgtbtKJa+LXSjSH67syaJaWdYoTUymbVDwD3M4y1519IGESw18i+Ix5rbvrJUtQJdFuI0M8gJLsJIVVDem/ms9/sMgY5e/1aM5Z3KbOh2TFZ1Sqh/WmpXYSGuyecu+fp9E+U4Xapz7nWlU06DWVm84zQ8LrRd066kYVuLP8tJliAx+9fj/IKn123FLXOdQ3iKDdmv515bohuoGF+rH1c3vtlXKnZLy6w04oIKjRHxlTPk02 7akZPgMO 7gWIstJHbvBm8M3/2dwQs517EQRfah6cHgzQF0R3XfbX0/Tqnn0fvUdH4iOJDbuZEzLaUPsXeV3k0kIJijzeoH01kazyPyj8w5sdSecmctN86qkopTXe+KJTrokBW8JHVCBFW4LsfVdN3+IzdC7yVFbz2kGSl8k7Gs1tAmiUek80RKzaEBWFqJdicBU0MZAQtFx2PzbFgcf6aHOP7coT7Mjb1TA36YBw7ZJg6XAlbbY8qUepJ9tgw1vYdXQl1JOnmdzpOKya98VQ5F4Nr8PmEe9GEikamWn+h7jJddhjpED5w7XjVMdGzNmsLrT/yLzwwY8IXnVf7RBy2/SGfwQSo0kPYDhbEA2VKsflWaWiwZClGFs1d5jkgZ0TQKg== 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: On Tue, 16 May 2023 20:25:34 +0200 Oscar Salvador wrote: > > ... > > page_owner is a great debug functionality tool that gets us to know > about all pages that have been allocated/freed and their stacktrace. > This comes very handy when e.g: debugging leaks, as with some scripting > we might be able to see those stacktraces that are allocating pages > but not freeing theme. > > ... > > include/linux/stackdepot.h | 8 +++ > lib/stackdepot.c | 128 ++++++++++++++++++++++++++++++++++--- > mm/page_owner.c | 54 ++++++++++++++++ > 3 files changed, 180 insertions(+), 10 deletions(-) Documentation/mm/page_owner.rst is feeling very sad. I'll toss it in there for some testing for now. The changelogs would benefit from a bit of proofreading, please - quite a few typos and grammaros.