liburcu is a LGPLv2.1 userspace RCU (read-copy-update) library. This data synchronization library provides read-side access which scales linearly with the number of cores. It does so by allowing multiples copies of a given data structure to live at the same time, and by monitoring the data structure accesses to detect grace periods after which memory reclamation is possible.

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Discussions about threaded interrupt handlers, system management interrupts, big kernel lock removal, and various types of locks.

An implementation of the basic linux rcu interfaces in user space.

A bunch of useful pointer about RCU.

This article explains a new version of linux's RCU (read-copy-update) that allows this code to scale to thousands of processors. It also has a good overview of the basic concepts behind RCU, and how using RCU improves multi-threaded scalability.

RCU is a synchronization mechanism available in the linux kernel which allows reads concurrently with updates.

RCU is a synchronization mechanism available in the Linux kernel which allows reads concurrent with updates.

RCU (Read-Copy-Update) is a synchronization mechanism in the Linux kernel that allows reads to occur concurrently with updates.