RCU

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God bless Paul E. McKenney, whose 2004 dissertation put on a rigorous footing the grubby claims of many foul patents. RCU, as it is commonly understood to mean, exploits atomicity of aligned pointer writes to provide high-performance (pretty much optimal for a heavy reader bias) reader-writer locks.

liburcu

The liburcu project of the LTTng (Linux Trace Toolkit Next Generation) effort is a userspace RCU library.

See also