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It maintains the hotness >> information based on the access history and time of access. >> >> Additionally, it provides per-lowertier-node kernel threads >> (named kpromoted) that periodically promote the pages that >> are eligible for promotion. >> >> Sub-systems that generate hot page access info can report that >> using this API: >> >> int pghot_record_access(u64 pfn, int nid, int src, >> unsigned long time) >> >> @pfn: The PFN of the memory accessed >> @nid: The accessing NUMA node ID >> @src: The temperature source (sub-system) that generated the >> access info >> @time: The access time in jiffies > > How will the page hotness information gather with NUMA balancing hint > page fault be expressed with this interface? Something like this can be done for reporting accesses detected by NUMA balancing - https://lore.kernel.org/linux-mm/20250616133931.206626-5-bharata@amd.com/ However we need to bypass the hot page threshold detection and rate limiting and have the same or similar functionality implemented within this patchset. Regards, Bharata.