Cpus-Only

A rough plan for CPUs/write-only monitoring RFC v3 and future

Updates after initial posting. 2026-05-25 update: A roadmap for a part of this project is posted 2026-02-18 update: LSF/MM/BPF topic for discussing the NUMA hinting faults reuse is posted. 2026-01-13 update: The RFC v3 has posted to the mailing list. Below is also sent as a mail to DAMON mailing list and relevant people. I’m working [1] on extending DAMON to monitor accesses that are made by specific CPUs, and/or for writes....

DAMON for Write-only or Given CPUs-only Monitoring

2025-12-08 update: The RFC v3 is posted. From the very early days of DAMON, there were attempts to extend it for cpus-aware monitoring and write-only monitoring. In 2022, Xin Hao proposed extending DAMON for NUMA access statistics. In 2022 and 2025, Pedro Demarchi Gomes proposed extending DAMON for writes-only monitoring. Those proposals are not yet upstreamed though. We continued similar DAMON extension discussions publicly and privately, with multiple parties, though....