The fairly short series of ten patches basically enhances folio lookup by noticing when folios are hot, and setting a "delay releasing this folio until after a RCU period", and then using that RCU delay it does not just the folio lookup itself under RCU (which we've done forever), but also the actual folio data accesses themselves under RCU. No refcount taking needed for the fastpath where we can just read the data from the folio entirely in an RCU-protected region when the user copy doesn't cause page faults.
Posted Oct 14, 2026 13:56 UTC (Wed) by jpeisach (subscriber, #181966) [Link] (6 responses) Linus: (uses LLM)
Posted Oct 14, 2026 14:03 UTC (Wed) by nreed (subscriber, #153856) [Link] (2 responses) Simply because I am out of context on this. Do you have lore for reference?
