Hi, This is stable release announcement for the Userspace RCU project. It covers the two currently maintained stable branches: 0.12 and 0.13, respectively with releases v0.12.4 and v0.13.2.
Especially for the spurious futex wakeup fix, users of the 0.12 and 0.13 (or older) liburcu branches are recommended to upgrade. * Noteworthy in these releases: - Handle spurious futex wakeups in urcu-qsbr, urcu, urcu-wait, defer_rcu, call_rcu, and workqueue code. This has been known to cause issues where the workqueue worker thread spuriously takes nearly 100% of CPU time. - Change method used by _rcu_dereference ot strip type constness. Rather than using pointer arithmetic (which does not work with opaque types), rely on a statement expression trick. - Fix support for Linux systems where sysconf(_SC_NPROCESSORS_CONF) can return a value less than max cpu id. Project website: https://liburcu.org Feedback is welcome! Thanks, Mathieu -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com
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