Linus Torvalds uses LLM to optimize Linux kernel folio lookup
October 14, 2026
Linus Torvalds utilized an LLM to develop a ten-patch series that optimizes folio lookup by deferring folio release until after an RCU period. This change allows data accesses to occur under RCU protection without refcount overhead, yielding an order-of-magnitude speedup in read-heavy benchmarks.
HOW THIS AFFECTS YOU
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builderYou can see practical kernel-level performance optimizations being driven by LLM assistance.
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researcherThis demonstrates the utility of LLMs in solving complex concurrency and synchronization problems in low-level systems code.