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b=Y4xIBEclaYjge0kRl9J0ZEMfTN13SWxQ5od+q5AOqu7p+AF20i9NUe0E+fXws3Sft ytWNrxRH9CPQHMcSYGFG1Yv3LewMySjQ2DntCwDIAYl/3Ctbl0F2fBrWbAxhmo+XiY a4+oF+fKXDHI6EBIh0OeopGIdHTSU6rhOiXuFW2VrgCzBUvo18ugeBftvpT1KIKX0h gbeulnr82Jz2kQfJMbP4RuqlwmrLuCh0VCRCoWOwxdcTJtR46hWU8mT5GxzxXpkyXZ 2Gf6iu8XXkDXD5JF/HvmB8D9VMEnFkVGFH1FBP31xBEnkavdP74oqcM1Gb4UA/7Ss6 G/NFgoeUidnqw== From: SeongJae Park 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, lizhijian@cn.fujitsu.com, 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: [RFC PATCH v2 0/7] DAMON based 2-tier memory management for CXL memory Date: Wed, 6 Mar 2024 19:05:50 -0800 Message-Id: <20240307030550.47095-1-sj@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240227235121.153277-1-sj@kernel.org> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: A5E3520008 X-Rspam-User: X-Stat-Signature: ayiibsmzigg1h7f5yjr8y7x3ijfyee6d X-Rspamd-Server: rspam01 X-HE-Tag: 1709780757-701868 X-HE-Meta: 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 s+Hv5qq0 ENON6EZ9kEQaYcVvBNZMTfnJcJrYbK/+dE03js6J8yggcgLjxNjd0nlG4ho24ViCt5aOkVEFOA5ry+tSH2iOTlTLo7GYL067x3xntEdqAOoIjqvTL2ReShcqGaEWUPcU2xlG04thwpbgIHvbyg0xH+jTHY8XLzqQorlP+jVbQ9xrMpg7g2c3nnQZsEtov9yt/R3FbY3L0ozZ8L3ZjgAhj0i9r9wPByEU9773fj/frCeshkBiFxCRLCM3hnbftOScJL+Nlbm0DrY6Rp6OA1CuUM3SULmYiC5Ko8yRUkb6Hg0vngT3vTzgMH8D89qW8StuepRzI6eYPt8UQFm9UJVVDx8LYnoKsQaDSLZkLbz1sdSPehQLVKhFfFbEJqA== 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: 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. > > [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 [...]