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bh=G2Iw3IxT8IO58jdGL/Pq6sBuEnBqkH6E0zGFpouWcLI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=d/fgzTl9jyROkQdOaDMRtcE8vjeYcllTQcSn1X8rT3nx5X/ZKeWNHtKf2/H/XTCNJ TkSQthb547PasR8wsBcGbliRXyFui5i//xQThKkM0bnMH1xuxYlAqoNyVsHOY1dHbh khfXi+uHbsUtQ1gEUQIBR2Cv96nM2DfD6sWwXCwh7ryJWvXM3tVIp78VIvTF7MsETu vBaEhrDHcNS3cOZrHiNr9U8uPlAnnso6TnZI3v0QGOuknN+K0aACyyAPJ2wlvQ+GB0 o6eBDyjL6nbGF8fytvoJKKhgxYnt/UKxWJV4klX6N3fQvbBGomG98I4qXXgtYL19aY LjdjAN4h0tHDQ== From: SJ Park To: "Yongting Lin" Cc: SJ Park , willy@infradead.org, Jonathan.Cameron@huawei.com, akpm@linux-foundation.org, alok.rathore@samsung.com, balbirs@nvidia.com, bharata@amd.com, byungchul@sk.com, dave.hansen@intel.com, dave@stgolabs.net, david@kernel.org, donettom@linux.ibm.com, gourry@gourry.net, joshua.hahnjy@gmail.com, kinseyho@google.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mgorman@techsingularity.net, mingo@redhat.com, nifan.cxl@gmail.com, peterz@infradead.org, raghavendra.kt@amd.com, riel@surriel.com, rientjes@google.com, shivankg@amd.com, weixugc@google.com, xuezhengchu@huawei.com, yiannis@zptcorp.com, ying.huang@linux.alibaba.com, yuanchu@google.com, ziy@nvidia.com Subject: Re: [PATCH v8 0/8] mm: Hot page tracking and promotion infrastructure Date: Mon, 10 Aug 2026 07:37:05 -0700 Message-ID: <20260810143706.93163-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260810033814.83951-1-linyongting@bytedance.com> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: E62EF8000C X-Stat-Signature: 9aohesuz8n45na3q3reof1wbbjkett79 X-Rspam-User: X-HE-Tag: 1786372637-160825 X-HE-Meta: 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 cY2a/nNF H1Y2opk0T+vmNA04zGwVr1BcK1ACFJEixyVjyh1sK7ab/qkqjxtnRzDDlLEnsnlgvQotSanoeHjBe3+MxJZyqHTe7xigY/ZD+B9Re58U09VPruWebql+dsmVCQB7kUNUOwBEnHj2Ev48pgZbxGSnX5gCtFGhiAY/nvHX41NccqbmxqmyOL3LxixnoRHDIUqDwgzrZdy3vUz4PnHU5kvhc4byam0QxK4PsOuoaTKtLXMAd/ryAimXM4r59LYKCpbocuNq7jpO3yluQXuHC2Hn67qnOjnvALsYtlvxpO7/SXYax5j8LSraGNobkd9+LoO9EzK1pwkjFp9Ky3FDSyC4/dIxcUqaleBMzVMIe0FoAlKaeEaI= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, 10 Aug 2026 11:38:14 +0800 "Yongting Lin" wrote: [...] > IBS is not the only possible hardware source. CXL 3.2 defines CHMU for > device-side hotness monitoring, and CHMU has also been discussed in the > DAMON and CXL hotness-monitoring discussions. Yes, we discussed DAMON could be extended for access check primitives other than page table accessed bit, and CHMU could be one of such primitives. The extension is in progress [1]. [...] > We would also be interested in helping test and compare the different > approaches as implementations become available. Please feel free to let me know if you want to test DAMON-based approaches. I will be happy to help :) [1] https://lore.kernel.org/all/20260525225208.1179-1-sj@kernel.org/ Thanks, SJ [...]