Hi Lance, Lian, Thanks for sharing this, Lance. I also saw SJ's post yesterday and was very happy to see DAMON being used in a real AI production environment and delivering measurable benefits.
Hopefully, DAMON and other MM features can continue to evolve in the AI era, better supporting diverse workloads and real-world use cases. Looking forward to learning more from the DSec experience and discussing this with everyone at LPC. Thanks, Kunwu On Fri, Sep 25, 2026 at 1:58 PM Lian Wang <[email protected]> wrote: > > Hi Lance, > > Thank you very much for sharing this and for your interest in the related > work. It is great to see DAMON and virtio-balloon being used together in > another real, large-scale system. > > One scenario we have recently been studying came from Sangfor. In a KVM/QEMU > deployment with guest memory backed by shared tmpfs and host THP enabled, > host-side DAMON can report a much larger hot-memory proportion than the > guest's fine-grained activity suggests. The related discussion is here: > > https://lore.kernel.org/all/[email protected]/ > > We are preparing more complete experiments and improvements around this > scenario, and we plan to discuss it in more depth at LPC. > > I am still actively running experiments based in part on SJ's earlier > introductions and our discussions. After LPC, we hope to share results on a > more regular basis, together with discussion outcomes and reports from more > scenarios. I believe DAMON will continue to become even better as these users > and perspectives come together. > > I am also contacting the authors of the DeepSeek paper to learn more about > their setup and experience. We hope they can join the discussion so that we > can work together to improve this area further. > > Kairui is also very interested in this DAMON use case and may already have > discussed related ideas with SJ, so I have kept him in Cc. > > Thank you again, Lance, and thanks everyone! > > Best, > Lian > > On Fri, 25 Sep 2026 13:44:08 +0800 Lance Yang <[email protected]> wrote: > > > I was reading DeepSeek's new DSec paper[1] and found a nice use of DAMON > > and virtio-balloon: > > > > And it worked: time-integrated host memory use fell by 21.2%, while peak > > usage stayed about the same, with no significant CPU overhead.
