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s=arc-20220608; d=hostedemail.com; t=1709886706; a=rsa-sha256; cv=none; b=F6wLK6WSvJjFmQj0b62p9xx+l15JUu9EH5REiXqXoKcIwhtJL6/86tSIFf6WGp/uP3j0kE zdtKcKOcFwMaU86Zz+sTSfERTXrNOQOfsoKriRZoIEz5jin2FURKEt3kRXpKkScvhpUXhq C2wX3g3ScdVTEonB1Aau//p5tIxZd/k= ARC-Authentication-Results: i=1; imf16.hostedemail.com; dkim=none; spf=pass (imf16.hostedemail.com: domain of honggyu.kim@sk.com designates 166.125.252.92 as permitted sender) smtp.mailfrom=honggyu.kim@sk.com; dmarc=none X-AuditID: a67dfc5b-d85ff70000001748-7f-65eacce93237 From: Honggyu Kim To: SeongJae Park Cc: Honggyu Kim , damon@lists.linux.dev, linux-mm@kvack.org, akpm@linux-foundation.org, apopple@nvidia.com, baolin.wang@linux.alibaba.com, dave.jiang@intel.com, hyeongtak.ji@sk.com, kernel_team@skhynix.com, linmiaohe@huawei.com, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, mathieu.desnoyers@efficios.com, mhiramat@kernel.org, rakie.kim@sk.com, rostedt@goodmis.org, surenb@google.com, yangx.jy@fujitsu.com, ying.huang@intel.com, ziy@nvidia.com, 42.hyeyoo@gmail.com Subject: Re: Re: [RFC PATCH v2 0/7] DAMON based 2-tier memory management for CXL memory Date: Fri, 8 Mar 2024 17:31:25 +0900 Message-ID: <20240308083129.1796-1-honggyu.kim@sk.com> X-Mailer: git-send-email 2.43.0.windows.1 In-Reply-To: <20240307030550.47095-1-sj@kernel.org> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprHIsWRmVeSWpSXmKPExsXC9ZZnoe6rM69SDX4sZbeY2GNgMWf9GjaL XTdCLP7vPcZo8eT/b1aLEzcb2Sw6vy9lsbi8aw6bxb01/1ktjqw/y2Kx+ewZZovFy9Us9nU8 YLI4/PUNk8XkSwvYLF5MOcNocXLWZBaL2UfvsTsIeSw9/YbNY0MTkNg56y67R8u+W+weCzaV erQcecvqsXjPSyaPTas62Tw2fZrE7nFixm8Wj50PLT1ebJ7J6NHb/I7N4/MmuQC+KC6blNSc zLLUIn27BK6MqdubWAqeCVS8/vGKuYFxHW8XIyeHhICJxK47vWww9rJXN1hBbDYBNYkrLycx gdgiAooS5x5fBIpzcTALLGSR6P2+ASwhLBAucarpNXMXIzsHi4CqxNZEkCivgJnEousTWCFG ako83v6THcTmFDCWePnyPTOILSTAI/Fqw35GiHpBiZMzn7CA2MwC8hLNW2czg6ySEDjELrFz 1Q9GiEGSEgdX3GCZwMg/C0nPLCQ9CxiZVjEKZeaV5SZm5pjoZVTmZVboJefnbmIExtqy2j/R Oxg/XQg+xCjAwajEw1tx92WqEGtiWXFl7iFGCQ5mJRFeFgugEG9KYmVValF+fFFpTmrxIUZp DhYlcV6jb+UpQgLpiSWp2ampBalFMFkmDk6pBka2zmn+3wNOSZQfaj3AY3RF5k7IbMPCybt2 OSRmadsH7+SNmROrvP1k4d6vN1y2hB27fe3HFceag+xbOw1LW3bPe3Gq+xNf8r2zbt2eQZpb IyZqXnDtXMIx56nh7IuG/9ddaFnwyOmKfn8/k9rtzb+7Az9zWcoGK7Xnch/eLKP35Fxv42n3 KxeVWIozEg21mIuKEwHxr/zSsQIAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprBIsWRmVeSWpSXmKPExsXCNUNLT/flmVepBjvazSwm9hhYzFm/hs1i 140Qi/97jzFaPPn/m9XixM1GNovPz14zW3Q++c5ocXjuSVaLzu9LWSwu75rDZnFvzX9WiyPr z7JYbD57htli8XI1i0PXnrNa7Ot4wGRx+OsbJovJlxawWbyYcobR4uSsySwWs4/eY3cQ81h6 +g2bx4YmILFz1l12j5Z9t9g9Fmwq9Wg58pbVY/Gel0wem1Z1snls+jSJ3ePEjN8sHjsfWnq8 2DyT0aO3+R2bx7fbHh6LX3xg8vi8SS5AIIrLJiU1J7MstUjfLoErY+r2JpaCZwIVr3+8Ym5g XMfbxcjJISFgIrHs1Q1WEJtNQE3iystJTCC2iICixLnHF4HiXBzMAgtZJHq/bwBLCAuES5xq es3cxcjOwSKgKrE1ESTKK2Amsej6BFaIkZoSj7f/ZAexOQWMJV6+fM8MYgsJ8Ei82rCfEaJe UOLkzCcsIDazgLxE89bZzBMYeWYhSc1CklrAyLSKUSQzryw3MTPHVK84O6MyL7NCLzk/dxMj ML6W1f6ZuIPxy2X3Q4wCHIxKPLwVd1+mCrEmlhVX5h5ilOBgVhLhZbEACvGmJFZWpRblxxeV 5qQWH2KU5mBREuf1Ck9NEBJITyxJzU5NLUgtgskycXBKNTD2e7KsOxDObuh5wr3bdqpo7+Wv 7x/XmBgqzDNsuqf398KjnYvPGl7wkH/O8fLv01zpNYfMzxix7tVsMbo+LSL5wcPz3+1YZCL9 Ky+FWka8WGJXzsNz2fJT8Yx0tQD9F6Lbv/OcU9Fluvh8q9PpAoN71zcefRu49adNX81Spbw8 vpl3mnewvipVYinOSDTUYi4qTgQAsqCBdasCAAA= X-CFilter-Loop: Reflected X-Stat-Signature: qra8681oqnpy368zrdq8aqdnauit9amm X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: D5D71180006 X-Rspam-User: X-HE-Tag: 1709886703-19985 X-HE-Meta: U2FsdGVkX18k2mNBdyPey1vVpFOBo2Kbdjv6DecMaHFSUvr2DVm0V7vK6P8QbSSyWbLgcSpN5y4kJbm7BMstM69QH3+HeMNh4A3Y2F+d8JusSFzl5yOcSzpOo/iG91G4W1RvR3JqXTA08L5hDnOK0yxDV7hW0AOkrqnZlDDeOhxnmSL4XDA7pfSBuKJggGfu4AUCb/Yd4i1p9dPPs7NFFkKXHGk/fmwEDSPUX8/uz+JjmEmXN8+x4tNVTZfszRoL9pxqSp8qmHhxIoaUcsrf49+fv00GYKOb3JD8snO7/0LuO8SDrK/YonFNsa2l+v+JR3dt9qy3mET3xQaypXmEHIfFKHgT35aPzUVBT3XKmttTAKoxkKWtMArzny5qGKOlqFNRjftYYfAqTQNAQC20qcG5Nz0rop5HklZCWsfQZyKf5bb7iUBQ5tAF92nC+HSDTnJwJVaNbWKN/sK+qyTJH9ELgZ0zWkve2H9o/w03WV41dd5Q/a4vewEoReG+5odAuy+e/hAWDQpDFYN4qf6wad1QMPw1oOm8q2jJHdQP5gesIt2TTIlRcfi7oSXi6Ko9PJbJa+llguWy625uTSEJwADldHprK+N5dW/klcB7i2FucAF7UR8fKHcx0qk8jtvYi+pPDwTtGuwq7WsKmFTwWSi01NkGsTHJMM6/FBZnaydNpN2Uz2Kw0+/GlXn3S4KCGQPR391WhQx8ONaseW8K7mIy1o42SF44LI/g1u7WVnhPqYa9MHlOkmjWUZwa7XwaAd2Y/Lkzx+rkSCMETaQbZjIP3UvF1WiF8Mt2O7NuorE4NV1nsh/7OIMuoexSIEQ6 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: Hi SeongJae, I couldn't send email to LKML properly due to internal system issues, but it's better now so I will be able to communicate better. On Wed, 6 Mar 2024 19:05:50 -0800 SeongJae Park wrote: > > Hello, > > On Tue, 27 Feb 2024 15:51:20 -0800 SeongJae Park wrote: > > > On Mon, 26 Feb 2024 23:05:46 +0900 Honggyu Kim wrote: > > > > > There was an RFC IDEA "DAMOS-based Tiered-Memory Management" previously > > > posted at [1]. > > > > > > It says there is no implementation of the demote/promote DAMOS action > > > are made. This RFC is about its implementation for physical address > > > space. > [...] > > Honggyu joined DAMON Beer/Coffee/Tea Chat[1] yesterday, and we discussed about > > this patchset in high level. Sharing the summary here for open discussion. As > > also discussed on the first version of this patchset[2], we want to make single > > action for general page migration with minimum changes, but would like to keep > > page level access re-check. We also agreed the previously proposed DAMOS > > filter-based approach could make sense for the purpose. > > > > Because I was anyway planning making such DAMOS filter for not only > > promotion/demotion but other types of DAMOS action, I will start developing the > > page level access re-check results based DAMOS filter. Once the implementation > > of the prototype is done, I will share the early implementation. Then, Honggyu > > will adjust their implementation based on the filter, and run their tests again > > and share the results. > > I just posted an RFC patchset for the page level access re-check DAMOS filter: > https://lore.kernel.org/r/20240307030013.47041-1-sj@kernel.org > > I hope it to help you better understanding and testing the idea. Thanks very much for your work! I will test it based on your changes. Thanks, Honggyu > > > > > [1] https://lore.kernel.org/damon/20220810225102.124459-1-sj@kernel.org/ > > [2] https://lore.kernel.org/damon/20240118171756.80356-1-sj@kernel.org > > > Thanks, > SJ > > [...] > > >