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[85.239.239.237]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2df91444814sm5797475ad.59.2026.09.25.00.29.28 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Fri, 25 Sep 2026 00:29:33 -0700 (PDT) From: Lian Wang To: "David Hildenbrand (Arm)" Cc: Lance Yang , sj@kernel.org, mst@redhat.com, damon@lists.linux.dev, linux-mm@kvack.org, virtualization@lists.linux.dev, Kairui Song , kunwu.chan@gmail.com, lianux.mm@gmail.com, baohua@kernel.org, xueyuan.chen21@gmail.com Subject: Re: [FYI] DAMON and virtio-balloon in DeepSeek's DSec paper Date: Fri, 25 Sep 2026 15:28:52 +0800 Message-ID: <20260925072912.39496-1-lianux.mm@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <9f63d60c-913e-4e79-9d28-890dd48ef713@kernel.org> References: <20260925054408.10431-1-lance.yang@linux.dev> <9f63d60c-913e-4e79-9d28-890dd48ef713@kernel.org> Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi David, Indeed, both directions are very exciting. virtio-pmem avoids duplicated page-cache residency, while DAMON with free-page reporting provides a practical path to reclaim cold guest memory and return it to the host. This connects closely with the work we are already doing. We are continuing to improve our DAMON-based experiments, and we would also like to explore how DAMON-based memory reclamation can be coordinated with broader CPU and resource monitoring. At LPC, I plan to bring detailed data and discuss the follow-up design with everyone. I hope we can turn this into an executable milestone, bring the related ideas together, and try more scenarios as a community. Everything looks very encouraging and gives us much to look forward to. With SJ helping coordinate the broader roadmap and everyone contributing, I am confident that we will achieve many more exciting results. Kernel work like this can continue making the world better. Thanks, Lian On Fri, 25 Sep 2026 09:04:41 +0200 "David Hildenbrand (Arm)" wrote: > Free-page reporting makes much more sense. > > When I was at RH we were looking at this issue as well. virtio-pmem was one > way of avoiding the page cache in VM entirely. But it has its own limitations.