Oct 27, 2025 · Fundamentals

Exploring eBPF‑Based Programmable Memory Management in the Linux Kernel

This article examines recent efforts to make Linux kernel memory management programmable with eBPF, covering BPF‑MM patches for mTHP order, cache‑ext’s customizable LRU, FetchBPF prefetch policies, and BPF OOM hooks, and discusses their design, implementation details, and performance impacts.

LRULinux kernelMemory Management

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Exploring eBPF‑Based Programmable Memory Management in the Linux Kernel

OPPO Kernel Craftsman

Apr 19, 2024 · Fundamentals

Large Folios in the Linux Kernel: Benefits, Implementations, and Future Directions

Large folios in the Linux kernel combine multiple pages to reduce TLB misses, page faults, and reclamation cost while enabling more efficient compression; they are supported by filesystems like XFS and bcachefs, and recent patches add multi‑size THP, swap‑in/out handling, TAO allocation, NUMA balancing, and debug tools, with OPPO’s production deployment showing performance gains and motivating broader adoption and fragmentation mitigation.

NUMASwapTLB

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Large Folios in the Linux Kernel: Benefits, Implementations, and Future Directions